F6D
F8D
T8D
OWNER’S MANUAL
U.S.A.Edition
LIT-18626-05-98
60R-F8199-10
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Important manual information
EMU25100
your machine and this manual. If there is any
question concerning this manual, please con-
To the owner
Thank you for choosing a Yamaha outboard
motor. This Owner’s Manual contains infor-
mation needed for proper operation, mainte-
nance and care. A thorough understanding of
these simple instructions will help you obtain
maximum enjoyment from your new Yamaha.
If you have any question about the operation
or maintenance of your outboard motor,
please consult a Yamaha dealer.
sult your Yamaha dealer.
NOTE:
The F6MH, F8MH, T8PH, T8EH, T8PR and
the standard accessories are used as a base
for the explanations and illustrations in this
manual. Therefore some items may not apply
to every model.
EMU25130
In this Owner’s Manual particularly important
information is distinguished in the following
ways.
F6D, F8D, T8D
OWNER’S MANUAL
©2004 by Yamaha Motor Corporation,
USA
The Safety Alert Symbol means AT-
TENTION! BECOME ALERT! YOUR SAFE-
TY IS INVOLVED!
EWM00780
1st Edition, January 2004
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in France
WARNING
Failure to follow WARNING instructions
could result in severe injury or death to the
machine operator, a bystander, or a per-
son inspecting or repairing the outboard
motor.
P/N LIT-18626-05-98
ECM00700
CAUTION:
A CAUTION indicates special precautions
that must be taken to avoid damage to the
outboard motor.
NOTE:
A NOTE provides key information to make
procedures easier or clearer.
Yamaha continually seeks advancements in
product design and quality. Therefore, while
this manual contains the most current product
information available at the time of printing,
there may be minor discrepancies between
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Table of contents
Throttle indicator........................... 17
Engine stop lanyard switch........... 18
Choke knob for pull type............... 19
Manual starter handle................... 19
Starter button................................ 19
Steering friction adjuster............... 20
Flushing device ............................ 22
General information ......................1
Outboard motor serial number ....... 1
Emission control information....... 1
North American models.................. 1
Star labels ...................................... 2
Important labels........................... 4
Warning labels................................ 4
Caution labels................................. 5
Basic boating rules
(Rules of the road) ................... 5
Steering and sailing rules and
Rules when encountering
vessels........................................ 6
Gasoline ....................................... 10
Engine oil...................................... 10
Battery requirement................... 10
Battery specifications ................... 11
Without a rectifier or Rectifier
Engine .......................................... 27
Checking the engine oil level........ 27
Filling fuel.................................. 27
Ring Free Fuel Additive................ 27
Operating engine ...................... 28
Feeding fuel (portable tank) ......... 28
Starting engine ............................. 29
Warming up engine................... 32
Manual start models..................... 32
Shifting...................................... 33
Regulator .................................. 11
Propeller selection..................... 11
Start-in-gear protection ............. 12
Main components...................... 13
Fuel tank....................................... 14
Fuel joint....................................... 15
Fuel gauge ................................... 15
Fuel tank cap................................ 15
Air vent screw............................... 15
Remote control............................. 15
Remote control lever .................... 15
Neutral interlock trigger ................ 16
Neutral throttle lever..................... 16
Choke switch................................ 16
Tiller handle.................................. 16
Gear shift lever............................. 16
Throttle grip .................................. 17
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Forward (tiller handle and remote
control models) ......................... 33
Reverse (manual tilt and hydro tilt
models) ..................................... 34
Stopping engine ........................ 35
Procedure..................................... 35
Procedure..................................... 35
Adjusting trim angle for manual tilt
models ...................................... 36
Adjusting trim angle
(power tilt models)..................... 37
Adjusting boat trim........................ 38
Tilting up and down................... 38
Procedure for tilting up
(manual tilt models)................... 39
Procedure for tilting up ................. 40
Procedure for tilting down
Replacement parts ....................... 51
spark plug ................................. 55
Checking fuel system ................... 55
Checking wiring and
Exhaust leakage........................... 58
Checking power trim and
Checking propeller ....................... 59
Removing the propeller ................ 60
Installing the propeller .................. 61
Changing gear oil ......................... 61
Inspecting and replacing
(manual tilt models)................... 40
Procedure for tilting down............. 41
Cruising in shallow water .......... 41
Cruising in shallow water
(manual tilt models)................... 41
Power trim and tilt models /
Cruising in other conditions....... 44
(for electric start models) .......... 63
Connecting the battery ................. 64
Transporting and storing
outboard motor....................... 46
Clamp screw mounting models .... 47
Storing outboard motor................. 47
Procedure..................................... 48
Lubrication (except oil injection
Troubleshooting ........................ 66
Temporary action in
emergency............................. 69
Impact damage............................. 69
Replacing fuse.............................. 69
Power trim and tilt will not
operate...................................... 70
Starter will not operate ................. 70
Emergency starting engine........... 70
Engine fails to operate .............. 72
Ignition system malfunction.......... 72
models) ..................................... 49
Cleaning and anticorrosion
measures .................................. 49
Battery care.................................. 49
Flushing power unit ...................... 50
Cleaning the outboard motor........ 51
Checking painted surface of
motor......................................... 51
Periodic maintenance................ 51
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Table of contents
Treatment of submerged
motor...................................... 72
Procedure..................................... 72
Consumer information................74
Important warranty information
for U.S.A. and Canada........... 74
YAMAHA MOTOR
CORPORATION, U.S.A.
FOUR-STROKE OUTBOARD
MOTOR THREE-YEAR
LIMITED WARRANTY ........... 76
IMPORTANT WARRANTY
INFORMATION IF YOU USE
YOUR YAMAHA OUTSIDE
U.S.A. OR CANADA .............. 78
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General information
EMU25170
Identification numbers record
EMU25182
Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket or the upper part of the swivel
bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is sto-
len.
EKMeU2y519n0 umber
If a main key switch is equipped with the mo-
tor, the key identification number is stamped
on your key as shown in the illustration.
Record this number in the space provided for
reference in case you need a new key.
1. Outboard motor serial number location
1. Key number
EMEU25m220ission control information
ENMoU2r52t3h0 American models
1. Outboard motor serial number location
This engine conforms to U.S. Environmental
Protection Agency (EPA) regulations for ma-
rine SI engines. See the label affixed to your
engine for details.
EMU25241
Approval label of emission control certifi-
cate
This label is attached to the bottom cowling.
1
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General information
New Technology; (4-stroke/HPDI) EM
Manufactured:
ZMU04346
ESMtUa25r27l2abels
1. Approval label location
Your outboard motor is labeled with a Califor-
nia Air Resources Board (CARB) star label.
See below for a description of your particular
label.
ZMU01699
EMU25261
Manufactured date label
This label is attached to the clamp bracket or
the swivel bracket.
1. Star labels location
EMU25280
One Star—Low Emission
The one-star label identifies engines that
meet the Air Resources Board’s 2001 ex-
haust emission standards. Engines meeting
these standards have 75% lower emissions
than conventional carbureted two-stroke en-
gines. These engines are equivalent to the
U.S. EPA’s 2006 standards for marine en-
gines.
1. Manufactured date label location
2
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General information
ZMU01702
ZMU01704
EMU25290
EMU25360
Two Stars—Very Low Emission
The two-star label identifies engines that meet
the Air Resources Board’s 2004 exhaust
emission standards. Engines meeting these
standards have 20% lower emissions than
One Star-Low-Emission engines.
Safety information
G Before mounting or operating the outboard
motor, read this entire manual. Reading it
should give you an understanding of the
motor and its operation.
G Before operating the boat, read any own-
er’s or operator’s manuals supplied with it
and all labels. Be sure you understand each
item before operating.
G Do not overpower the boat with this out-
board motor. Overpowering the boat could
result in loss of control. The rated power of
the outboard should be equal to or less than
the rated horsepower capacity of the boat.
If the rated horsepower capacity of the boat
is unknown, consult the dealer or boat man-
ufacturer.
G Do not modify the outboard. Modifications
could make the motor unfit or unsafe to use.
G Never operate after drinking alcohol or tak-
ing drugs. About 50% of all boating fatalities
involve intoxication.
ZMU01703
EMU25300
Three Stars—Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s 2008 ex-
haust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low-Emission engines.
G Have an approved personal flotation device
(PFD) on board for every occupant. It is a
good idea to wear a PFD whenever boat-
ing. At a minimum, children and non-swim-
mers should always wear PFDs, and
3
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General information
everyone should wear PFDs when there G Always watch carefully for swimmers during
are potentially hazardous boating condi-
tions.
the engine operation.
G Stay away from swimming areas.
G Gasoline is highly flammable, and its va- G When a swimmer is in the water near you
pors are flammable and explosive. Handle shift into neutral and shut off the engine.
and store gasoline carefully. Make sure Be informed about boating safety. Additional
there are no gas fumes or leaking fuel be- publications and information can be obtained
fore starting the engine.
from many organizations, including the follow-
G This product emits exhaust gases which ing:
contain carbon monoxide, a colorless, United States Coast Guard
odorless gas which may cause brain dam- Consumer Affairs Staff (G-BC)
age or death when inhaled. Symptoms in-
Office of Boating, Public, and Consumer Af-
clude nausea, dizziness, and drowsiness. fairs
Keep cockpit and cabin areas well ventilat-
ed. Avoid blocking exhaust outlets.
U.S. Coast Guard Headquarters
Washington, D.C. 20593-0001
operation before starting the engine.
Boating Safety Hotline: 1-800-368-5647
National Marine Manufacturers Associa-
G Attach the engine stop switch lanyard cord tion (NMMA)
to a secure place on your clothing, or your 401 N. Michigan Ave.
arm or leg while operating. If you acciden-
Chicago, Il 60611
tally leave the helm, the cord will pull from Marine Retailers Association of America
the switch, stopping the engine.
155 N. Michigan Ave.
G Know the marine laws and regulations
where you will be boating—and obey them.
For basic boating rules, see “Rules of the
road” on page 5.
G Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
Chicago, Il 60601
EMU25380
Important labels
EMU25395
Warning labels
G Tell someone where you are going: leave a
Float Plan with a responsible person. Be
sure to cancel the Float Plan when you re-
turn.
G Use common sense and good judgment
when boating. Know your abilities, and be
sure you understand how your boat han-
dles under the different boating conditions
you may encounter. Operate within your
limits, and the limits of your boat. Always
operate at safe speeds, and keep a careful
watch for obstacles and other traffic.
EMU25401
Label
EWM01260
WARNING
G Be sure shift control is in neutral before
starting engine. (except 2HP)
4
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General information
G Do not touch or remove electrical parts
when starting or during operation.
G Keep hands, hair, and clothes away from
flywheel and other rotating parts while
engine is running.
EMU25431
Label
EWM01300
WARNING
G This engine is equipped with a neutral
starting device.
G The engine will not start unless the shift
control is in neutral position.
EMBU25a500sic boating rules (Rules of
the road)
Just as there are rules which apply when you
are driving on streets and high ways, there
are waterway rules which apply when you are
driving your boat. These rules are used inter-
nationally, and are also enforced by the Unit-
ed States Coast Guard and local agencies.
You should be aware of these rules, and fol-
low them whenever you encounter another
vessel on the water.
ECMaU2u54t6i4on labels
Several sets of rules prevail according to geo-
graphic location, but are all basically the same
as the International Rules of the Road. The
rules presented here in your Owner’s Manual
are condensed, and have been provided for
your convenience only. Consult your local
U.S. Coast Guard Auxiliary or Department of
Motor Vehicles for a complete set of rules
governing the waters in which you will be us-
ing your boat.
EMU25472
Label
ECM01190
CAUTION:
Transport and store the engine only as
shown. Otherwise, engine damage could
result from Leaking oil.
ESMtUe25e51r0ing and sailing rules and sound
signals
Whenever two vessels on the water meet one
another, one vessel has the right-of-way; it is
called the “stand-on” vessel. The vessel
which does not have the right-of-way is called
the “give-way” or “burdened” vessel. These
rules determine which vessel has the right-of-
way, and what each vessel should do.
5
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General information
Stand-on vessel
Overtaking: (you are passing or being
passed by another vessel)
The vessel with the right-of-way has the duty
to continue its course and speed, except to
avoid an immediate collision. When you main-
tain your direction and speed, the other vessel
will be able to determine how best to avoid
you.
In the following illustration, your boat is in the
center. You should give the right-of-way to
any vessels shown in white area (you are the
Give-Way vessel). Any vessels in the shaded
area must yield to you (they are the Give-Way
vessels). Both you and the meeting vessel
must alter course to avoid each other.
Give-way vessel
The vessel which does not have the right-of-
way has the duty to take positive and timely
action to stay out of the way of the Stand-On
vessel. Normally, you should not cross in front
of the vessel with the right-of-way. You should
slow down or change directions briefly and
pass behind the other vessel. You should al-
ways move in such a way that the operator of
the other vessel can see what you are doing.
“The general prudential rule”
This rule is called Rule 2 in the International
Rules and says,
Meeting
“In obeying and construing these rules due re-
gard shall be had to all dangers of navigation
and collision, and to any special circumstanc-
es, which may render a departure from the
above rules necessary in order to avoid im-
mediate danger.”
In other words, follow the standard rules ex-
cept when a collision will occur unless both
vessels try to avoid each other. If that is the
case, both vessels become “Give-Way” ves-
sels.
If you are meeting another power vessel head
on, and are close enough to run the risk of col-
lision, neither of you has the right-of-way!
Both of you should alter course to avoid an ac-
cident. You should keep the other vessel on
your port (left) side. This rule doesn’t apply if
both of you will clear one another if you con-
tinue on your set course and speed.
ERMuU2l5e52s0 when encountering vessels
There are three main situations which you
may encounter with other vessels which could
lead to a collision unless the Steering Rules
are followed:
Meeting: (you are approaching another ves-
sel head-on)
Crossing: (you are traveling across the other
vessel’s path)
6
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General information
Crossing
vessels, the operator should sound a pro-
longed blast on the whistle (4 to 6 seconds). If
another vessel is around the bend, it too
should sound the whistle. Even if no reply is
heard, however, the vessel should still pro-
ceed around the bend with caution. If you nav-
igate such waters with your boat, you will
need to carry a portable air horn, available
from local marine supply stores.
When two power driven vessels are crossing
each other’s path close enough to run the risk
of collision, the vessel which has the other on
the starboard (right) side must keep out of the
way of the other. If the other vessel is on your
right, you must keep out of its way; you are the
Give-Way vessel. If the other vessel is on
your port (left) side, remember that you
should maintain course and direction, provid-
Fishing vessel right-of-way
ed the other vessel gives you the right-of-way All vessels which are fishing with nets, lines or
as it should.
trawls are considered to be “fishing vessels”
under the International Rules. Vessels with
trolling lines are not considered fishing ves-
sels. Fishing vessels have the right-of-way re-
gardless of position. Fishing vessels cannot,
however, impede the passage of other ves-
sels in narrow channels.
Sailing vessel right-of-way
Sailing vessels should normally be given the
right-of-way. The exceptions to this are:
1. When the sailing vessel is overtaking the
power-driven vessel, the power-driven
vessel has the right-of-way.
2. Sailing vessels should keep clear of any
fishing vessel.
3. In a narrow channel, a sailing vessel
should not hamper the safe passage of a
power-driven vessel which can navigate
only in such a channel.
Overtaking
If you are passing another vessel, you are the
“Give-Way” vessel. This means that the other
vessel is expected to maintain its course and
speed. You must stay out of its way until you
are clear of it. Likewise, if another vessel is
passing you, you should maintain your speed
and direction so that the other vessel can
Reading buoys and other markers
steer itself around you.
EMU25530
The waters of the United states are marked
for safe navigation by the lateral system of
buoyage. Simply put, buoys and markers
have an arrangement of shapes, colors, num-
bers and lights to show which side of the buoy
a boater should pass on when navigating in a
particular direction. The markings on these
buoys are oriented from the perspective of be-
ing entered from seaward (the boater is going
towards the port). This means that red buoys
are passed on the starboard (right) side when
Other special situations
There are three other rules you should be
aware of when driving your boat around other
vessels.
Narrow channels and bends
When navigating in narrow channels, you
should keep to the right when it is safe and
practical to do so. If the operator of a power-
driven vessel is preparing to go around a
bend that may obstruct the view of other water
7
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General information
proceeding from open water into port, and
black buoys are to port (left) side. When navi-
gating out of port, your position with respect to
the buoys should be reversed; red buoys
should be to port and black buoys to star-
board.
Many bodies of water used by boaters are en-
tirely within the boundaries of a particular
state. The Uniform State Waterway Marking
System has been devised for these waters.
This system uses buoys and signs with dis-
tinctive shapes and colors to show regulatory
or advisory information. These markers are
white with black letters and orange boarders.
They signify speed zones, restricted areas,
danger areas, and general information.
Remember, markings may vary by geograph-
ic location. Always consult local boating au-
thorities before driving your boat in unfamiliar
waters.
8
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General information
ZMU01708
EMU25540
EWM00010
G Do not smoke when refueling, and keep
away from sparks, flames, or other
sources of ignition.
G Stop engine before refueling.
G Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
Fueling instructions
WARNING
GASOLINE AND ITS VAPORS ARE HIGH-
LY FLAMMABLE AND EXPLOSIVE!
9
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General information
EEMnU2g56i8n0 e oil
G Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
Recommended engine oil:
4-stroke motor oil with a combination of
corresponding SAE and API as shown
in the chart
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
G Do not overfill the fuel tank.
G Tighten the filler cap securely after refu-
eling.
G If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.
G If any gasoline spills onto your skin, im-
mediately wash with soap and water.
Change clothing if gasoline spills on it.
G Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostat-
ic sparks.
ECM00010
CAUTION:
ECM01050
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign matter.
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
EMU25570
Gasoline
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
Recommended gasoline:
Regular unleaded gasoline with a
minimum octane rating of 86 (Pump
Octane Number) = (R+M)/2
Gasohol
There are two types of gasohol: gasohol con-
taining ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10% and the
fuel meets minimum octane ratings. Yamaha
does not recommended gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
ZMU01710
EMU25690
Battery requirement
ECM01060
CAUTION:
Do not use a battery that does not meet the
specified capacity. If a battery which does
not meet specifications is used, the elec-
10
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General information
EMU25741
tric system could perform poorly or be
overloaded, causing electric system dam-
age.
Propeller selection
The performance of your outboard motor will
be critically affected by your choice of propel-
ler, as an incorrect choice could adversely af-
fect performance and could also seriously
damage the motor. Engine speed depends on
the propeller size and boat load. If engine
speed is too high or too low for good engine
performance, this will have an adverse effect
on the engine.
For electric start models, choose a battery
which meets the following specifications.
EBMaU2t5t71e1ry specifications
Minimum cold cranking amps
(CCA/SAE):
T8PRD 245.0 A
T8PHD 245.0 A
Yamaha outboard motors are fitted with pro-
pellers chosen to perform well over a range of
applications, but there may be uses where a
propeller with a different pitch would be more
appropriate. For a greater operating load, a
smaller-pitch propeller is more suitable as it
enables the correct engine speed to be main-
tained. Conversely, a larger-pitch propeller is
more suitable for a smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller on
your outboard that is best suited to your appli-
cation.
T8EHD 245.0 A
Minimum marine cranking amps
(MCA/ABYC):
T8PRD 323.0 A
T8PHD 323.0 A
T8EHD 323.0 A
Minimum reserve capacity (RC/SAE):
T8PRD 52 minutes
T8PHD 52 minutes
T8EHD 52 minutes
EMU25730
Without a rectifier or Rectifier
Regulator
ECM01090
CAUTION:
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, install
an optional Rectifier Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the bat-
tery significantly.
Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an op-
tional Rectifier Regulator.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
11
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General information
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
NOTE:
Select a propeller which will allow the engine
to reach the middle or upper half of the oper-
ating range at full throttle with the maximum
boat load. If operating conditions such as light
boat loads then allow the engine r/min to rise
above the maximum recommended range, re-
duce the throttle setting to maintain the en-
gine in the proper operating range.
For instructions on propeller removal and in-
stallation, see page 59.
EMU25770
Start-in-gear protection
Yamaha outboard motors or Yamaha-ap-
proved remote control units are equipped with
start-in-gear protection device(s). This feature
permits the engine to be started only when it
is in neutral. Always select neutral before
starting the engine.
12
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Basic components
EMU25795
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F6, F8
1. Top cowling
16.Clamp screw
17.Rope attachment
18.Flushing device
19.Choke knob
2. Top cowling lock lever
3. Anti-cavitation plate
4. Propeller*
5. Cooling water inlet
6. Drain screw
7. Trim rod
8. Clamp bracket
9. Manual starter handle
10.Warning indicator
11.Engine stop button/Engine stop lanyard
switch
12.Gear shift lever
13.Tiller handle
14.Steering friction lever
15.Tilt lock lever
13
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Basic components
T8
1. Top cowling
21.Choke knob
2. Top cowling lock lever
3. Anti-cavitation plate
4. Propeller
5. Cooling water inlet
6. Drain screw
22.Remote control box (side mount type)*
EMU25802
Fuel tank
If your model was equipped with a portable
fuel tank, its function is as follows.
EWM00020
7. Trim rod
8. Clamp bracket
9. Power tilt switch*
10.Manual starter handle*
11.Warning indicator
12.Starter button*
13.Engine stop button/Engine stop lanyard
switch*
14.Gear shift lever*
15.Tiller handle*
WARNING
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Com-
mercial users should conform to relevant
licensing or approval authority regula-
tions.
16.Steering friction lever*
17.Tilt lock lever*
18.Clamp screw
19.Rope attachment
20.Flushing device
14
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Basic components
4
1
3
2
ZMU01992
1. Power trim and tilt switch
2. Remote control lever
3. Neutral interlock trigger
4. Neutral throttle lever
1. Air vent screw
2. Fuel gauge
3. Fuel joint
4. Fuel tank cap
5. Main switch / choke switch
6. Engine stop lanyard switch
7. Throttle friction adjuster
EMU25830
Fuel joint
This joint is used to connect the fuel line.
EMU25841
ERMeU2m619o0 te control lever
Fuel gauge
This gauge is located on either the fuel tank
cap or on the fuel joint base. It shows the ap-
proximate amount of fuel remaining in the
tank.
EMU25850
Moving the lever forward from the neutral po-
sition engages forward gear. Pulling the lever
back from neutral engages reverse. The en-
gine will continue to run at idle until the lever
is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.
EAMiUr25v86e0 nt screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
ERMeU2m618o0 te control
The remote control lever actuates both the
shifter and the throttle. The electrical switches
are mounted on the remote control box.
1. Neutral “ ”
2. Forward “ ”
3. Reverse “ ”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
15
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Basic components
ENMeU2u62t01ral interlock trigger
ECMhU2o622k1e switch
To shift out of neutral, first pull the neutral in- To activate the choke system, press in the
terlock trigger up.
main switch while the key is turned to the “
”
(on) or “ ” (start) position. The choke sys-
tem will then supply the rich fuel mixture re-
quired to start the engine. When the key is
released, the choke will switch off automati-
cally.
1. Neutral interlock trigger
ENMeU2u62t11ral throttle lever
To open the throttle without shifting into either
forward or reverse, put the remote control le-
ver in the neutral position and lift the neutral
throttle lever.
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
NOTE:
The neutral throttle lever will operate only
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed
position.
EMU25921
Gear shift lever
Pulling the gear shift lever towards you puts
the engine in forward gear so that the boat
moves ahead. Pushing the lever away from
you puts the engine in reverse gear so that the
boat moves astern.
1. Fully open
2. Fully closed
16
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Basic components
1. Forward “ ”
2. Neutral “ ”
3. Reverse “ ”
1. Throttle indicator
EMU25970
Throttle friction adjuster
A friction device provides adjustable resis-
tance to movement of the throttle grip or the
remote control lever, and can be set accord-
ing to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
EMU25941
Throttle grip
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.
adjuster counterclockwise.
EWM00030
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move throttle lever or grip,
which could result in an accident.
EMU25961
Throttle indicator
The fuel consumption curve on the throttle in-
dicator shows the relative amount of fuel con-
sumed for each throttle position. Choose the
setting that offers the best performance and
fuel economy for the desired operation.
17
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Basic components
NOTE:
The engine cannot be started with the lock
plate removed.
When constant speed is desired, tighten the
adjuster to maintain the desired throttle set-
ting.
EEMnU2g59i9n0 e stop lanyard switch
1. Lanyard
2. Lock plate
The lock plate must be attached to the engine
stop switch for the engine to run. The lanyard
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
lanyard will pull out the lock plate, stopping ig-
nition to the engine. This will prevent the boat
from running away under power.
EWM00120
WARNING
G Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
1. Lanyard
2. Lock plate
G Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entan-
gled, preventing it from functioning.
G Avoid accidentally pulling the lanyard
during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
EEMnU2g60i0n1 e stop button
To open the ignition circuit and stop the en-
gine, push this button.
18
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Basic components
ECMhU2o601k1e knob for pull type
To supply the engine with the rich fuel mixture
required to start, pull out this knob.
EMU26090
Main switch
The main switch controls the ignition system;
its operation is described below.
EMU26070
G “
” (off)
Manual starter handle
With the main switch in the “
tion, the electrical circuits are off, and the key
can be removed.
” (off) posi-
To start the engine, first gently pull the handle
out until resistance is felt. From that position,
then pull the handle straight out quickly to
crank the engine.
G “ ” (on)
With the main switch in the “ ” (on) position,
the electrical circuits are on, and the key can-
not be removed.
G “
” (start)
With the main switch in the “
” (start) po-
sition, the starter motor turns to start the en-
gine. When the key is released, it returns
automatically to the “ ” (on) position.
ESMtUa26r08t0er button
To start the engine with the electric starter,
push the starter button.
EPMoU2w610e2 r tilt switch
The power tilt system adjusts the outboard
motor angle in relation to the transom. Push-
ing the switch “ ” (up) tilts the outboard mo-
19
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Basic components
ESMtUe26e11r0ing friction adjuster
tor up. Pressing the switch “ ” (down) tilts
the outboard motor down. When the switch is
released, the outboard motor will stop in its
current position.
A friction device provides adjustable resis-
tance to the steering mechanism, and can be
set according to operator preference. An ad-
juster lever is located on the bottom of the
tiller handle bracket.
To increase resistance, turn the lever to the
left.
To decrease resistance, turn the lever to the
right.
EWM00040
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.
EMU26261
Trim rod (tilt pin)
The position of the trim rod determines the
minimum trim angle of the outboard motor in
relation to the transom.
NOTE:
For instructions on using the power tilt switch,
see pages 36 and 38.
20
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Basic components
EMU26312
Tilt lock mechanism
The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when in reverse gear.
EPMoU2w636e0 r tilt unit
This unit tilts the outboard motor up and down
and is controlled with the power tilt switch.
ECM00630
1. Tilt lock lever
CAUTION:
To lock it, set the tilt lock lever in the “
(lock) position. To release, push the tilt lock le-
ver in the “ ” (release) position.
EMU26320
”
Do not step on or exert pressure on the
power tilt motor. The power tilt unit could
be damaged as a result.
Tilt support knob
To keep the outboard motor in the tilted up po-
sition, push the tilt support knob under the
swivel bracket.
1. Power tilt unit
2. Power tilt motor
EMU26382
Top cowling lock lever (pull up type)
To remove the engine top cowling, pull up the
lock lever(s) and lift off the cowling. When in-
stalling the cowling, check to be sure it fits
properly in the rubber seal. Then lock the
cowling by moving the lever(s) downward.
EMU26330
Tilt support bar
The tilt support bar keeps the outboard motor
in the tilted up position.
21
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Basic components
1. Warning indicator
EMU26460
Flushing device
EMU26501
Low oil pressure warning indicator
If oil pressure drops too low, this indicator will
flash. For further information, see page 23.
ECM00020
This device is used to clean the cooling water
passages of the motor using a garden hose
and tap water.
NOTE:
CAUTION:
For details on usage, see page 50.
G Do not continue to run the engine if the
low oil pressure warning indicator is on
and the engine oil level is lower. Serious
engine damage will occur.
G The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remain-
ing oil quantity. For further information,
see page 27.
1. Flushing device
EMU26300
Warning indicator
If the engine develops a condition which is
cause for warning, the indicator lights up. For
details on how to read the warning indicator,
see page 23.
22
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Basic components
EMU26801
ECM00090
Warning system
CAUTION:
Do not continue to operate the engine if a
warning device has activated. Consult
your Yamaha dealer if the problem cannot
be located and corrected.
EMU30164
Low oil pressure warning
If the oil pressure drops too low, the warning
device will activate.
Activation of warning device
G The engine speed will automatically de-
crease to about 2000 r/min.
G The low oil pressure warning indicator will
light.
G The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).
If the warning system has activated, stop the
engine as soon as it is safe to do so. Check
the oil level and add oil as needed. If the oil
level is correct and the warning device does
not switch off, consult your Yamaha dealer.
ECM00100
CAUTION:
Do not continue to run the engine if the
low oil pressure warning indicator is on.
Serious engine damage could occur.
23
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Operation
EMU26901
EWM00830
Installation
WARNING
ECM00110
Improper mounting of the outboard motor
could result in hazardous conditions such
as poor handling, loss of control, or fire
hazards. Observe the following:
G For permanently mounted models, your
dealer or other person experienced in
proper rigging should mount the motor.
If you are mounting the motor yourself,
you should be trained by an experienced
person.
CAUTION:
Incorrect engine height or obstructions to
smooth water flow (such as the design or
condition of the boat, or accessories such
as transom ladders or depth finder trans-
ducers) can create airborne water spray
while the boat is cruising. Severe engine
damage may result if the motor is operat-
ed continuously in the presence of air-
borne water spray.
G For portable models, your dealer or oth-
er person experienced in proper out-
board motor mounting should show you
how to mount your motor.
NOTE:
During water testing check the buoyancy of
the boat, at rest, with its maximum load.
Check that the static water level on the ex-
haust housing is low enough to prevent water
entry into the powerhead, when water rises
due to waves when the outboard is not run-
ning.
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise the
boat will be hard to steer. For boats without a
keel or which are asymmetrical, consult your
dealer.
EMU26910
Mounting the outboard motor
EWM00820
WARNING
G Overpowering a boat could cause se-
vere instability. Do not install an out-
board motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
G The information presented in this sec-
tion is intended as reference only. It is
not possible to provide complete in-
structions for every possible boat and
motor combination. Proper mounting
depends in part on experience and the
specific boat and motor combination.
1
ZMU01760
1. Center line (keel line)
EMU26920
Mounting height
To run your boat at optimum efficiency, the
water resistance (drag) of the boat and out-
board motor must be made as little as possi-
ble. The mounting height of the outboard
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
24
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Operation
EWM00640
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
low, the water resistance will increase and
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is between the bottom of the boat and a
level 25 mm (1 in.) below it.
WARNING
Loose clamp screws could allow the out-
board motor to fall off or move on the tran-
som. This could cause loss of control and
serious injury. Make sure the transom
screws are tightened securely. Occasion-
ally check the screws for tightness during
operation.
0–25mm
(0–1in.)
ZMU02011
ZMU02012
NOTE:
equipped on your engine, an engine re-
straint cable or chain should be used. At-
tach one end to the engine restraint cable
attachment and the other to a secure
mounting point on the boat. Otherwise
the engine could be completely lost if it
accidentally falls off the transom.
G The optimum mounting height of the out-
board motor is affected by the boat and mo-
tor combination and the desired use. Test
runs at different heights can help determine
the optimum mounting height. Consult your
Yamaha dealer or boat manufacturer for
further information on determining the prop-
er mounting height.
G For instructions on setting the trim angle of
the outboard motor, see page 36.
ECMlUa26m970ping the outboard motor
1. Place the outboard motor on the transom
so that it is positioned as close to the cen-
ter as possible. Tighten the transom
clamp screws evenly and securely. Oc-
casionally check the clamp screws for
tightness during operation of the out-
board motor because they could become
loose due to engine vibration.
ZMU02013
25
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Operation
3. Secure the clamp bracket to the transom 1. For the first hour of operation:
using the bolts provided with the out-
board (if packed). For details, consult
your Yamaha dealer.
Run the engine at 2000 r/min or at ap-
proximately half throttle.
2. For the second hour of operation:
Run the engine at 3000 r/min or at ap-
proximately three-quarter throttle.
3. For the next eight hours of operation:
Avoid continuous operation at full throttle
for more than five minutes at a time.
4. After the first 10 hours:
EWM00650
WARNING
Avoid using bolts, nuts or washers other
than those contained in the engine pack-
aging. If used, they must be of at least the
same quality of material and strength and
must be tightened securely. After tighten-
ing, test run the engine and check their
tightness.
Operate the engine normally.
EMU27101
Preoperation checks
EWM00080
WARNING
If any item in the preoperation check is not
working properly, have it inspected and
repaired before operating the outboard
motor. Otherwise an accident could occur.
ECM00120
1
CAUTION:
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
ZMU02014
1. Bolts
EMU30171
EMU27110
Breaking in engine
Fuel
G Check to be sure you have plenty of fuel for
your trip.
G Make sure there are no fuel leaks or gaso-
line fumes.
Your new engine requires a period of break-in
to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help en-
sure proper performance and longer engine
G Check fuel line connections to be sure they
are tight (if equipped Yamaha fuel tank or
boat tank).
life.
ECM00800
CAUTION:
Failure to follow the break-in procedure G Be sure the fuel tank is positioned on a se-
could result in reduced engine life or even
severe engine damage.
cure, flat surface, and that the fuel line is not
twisted or flattened, or likely to contact
sharp objects (if equipped Yamaha fuel
tank or boat tank).
EPMrUo27c080edure for 4-stroke models
Run the engine under load (in gear with a pro-
peller installed) as follows.
ECMoU2n713t0rols
G Check throttle, shift, and steering for proper
operation before starting the engine.
26
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Operation
G The controls should work smoothly, without
binding or unusual free play.
G Look for loose or damaged connections.
G Check operation of the starter and stop
switches when the outboard motor is in the
water.
EEMnU2g71i4n0 e
G Check the engine and engine mounting.
G Look for loose or damaged fasteners.
G Check the propeller for damage.
ECMhU2e71c63king the engine oil level
1. Put the outboard motor in an upright po-
sition (not tilted).
NOTE:
Be sure to completely insert the dipstick into
the dipstick guide.
EMU27433
2. Remove oil dipstick and wipe it clean.
3. Completely insert the dipstick and re-
move it again.
Filling fuel
EWM00060
WARNING
4. Check the oil level using the dipstick to be
sure the level falls between the upper and
lower marks. Fill with oil if it is below the
lower mark, or drain to the specified level
if it is above the upper mark.
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
1. Remove the fuel tank cap.
2. Carefully fill the fuel tank.
3. Securely close the cap after filling the
tank. Wipe up any spilled fuel.
1
3
2
Fuel tank capacity:
12 L (3.17 US gal) (2.64 Imp.gal)
ERMiUn27g270Free Fuel Additive
ZMU02082
Gasoline is a precise blend of many different
substances, each chosen to give certain char-
acteristics. Gasoline blends have been
changing in recent years in response to con-
cerns about pollution and resulting emissions
regulations. One of the most obvious changes
has been the elimination of lead from most fu-
els.
1. Lower level mark
2. Oil dipstick
3. Upper level mark
27
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Operation
As gasoline has changed, the amount of addi-
tives such as aromatics and oxygenates has
increased. These additives are important for
the engines in passenger cars, but they can
have detrimental effects in marine engines,
because of increased deposits in the combus-
tion chamber. When enough deposits collect,
piston rings begin sticking. Performance
drops and engine wear increases dramatical-
ly.
drowsiness. Keep cockpit and cabin ar-
eas well ventilated. Avoid blocking ex-
haust outlets.
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
While many additives available may reduce
deposits, Yamaha recommends the use of
Ring Free Fuel Additive, available from your
Yamaha dealer. Ring Free Fuel Additive
has repeatedly proven its ability to clean com-
bustion deposits from inside the engine, nota-
bly the critical piston-ring-land area, and fuel
system components. Follow product labeling
2. If there is a fuel joint on the motor, firmly
connect the fuel line to the joint. Then
firmly connect the other end of the fuel
line to the joint on the fuel tank.
for use instructions.
EMU27450
Operating engine
EMU27461
Feeding fuel (portable tank)
EWM00420
WARNING
G Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
G When the air vent screw is loosened,
gasoline vapor will be released. Gaso-
line is highly flammable, and its vapors
are flammable and explosive. Refrain
from smoking, and keep away from
open flames and sparks while loosening
the air vent screw.
G This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which could cause brain
damage or death when inhaled. Symp-
toms include nausea, dizziness, and
ZMU02024
28
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Operation
3. If a steering friction adjuster is provided 2. Attach the engine stop switch lanyard to
on your outboard motor, securely attach
the fuel line to the fuel line clamp.
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the en-
gine stop switch.
NOTE:
During engine operation place the tank hori-
zontally, otherwise fuel cannot be drawn from
the fuel tank.
EWM00120
WARNING
G Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
4. Squeeze the primer pump with the outlet
end up until you feel it become firm.
G Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entan-
gled, preventing it from functioning.
G Avoid accidentally pulling the lanyard
during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
ZMU02025
ESMtUa27r4t90ing engine
EMU27505
Manual start models (tiller control)
1. Place the gear shift lever in neutral.
3. Place the throttle grip in the “
”
(start) position.
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neu-
tral.
29
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Operation
4. Pull out / turn the choke knob fully. After 6. After the engine starts, slowly return the
the engine starts, replace / return the
knob to the home position.
manual starter handle to its original posi-
tion before releasing it.
7. Slowly return the throttle grip to the fully
closed position.
ZMU02030
NOTE:
G It is not necessary to use the choke when
starting a warm engine.
G If the choke knob is left in the “
NOTE:
” (start)
G When the engine is cold, it needs to be
warmed up. For further information, see
page 32.
position while the engine is running, the en-
gine will run poorly or stall.
G If the engine does not start on the first try,
repeat the procedure. If the engine fails to
start after 4 or 5 tries, open the throttle a
small amount (between 1/8 and 1/4) and try
again. Also if the engine is warm and fails to
start, open the throttle a same amount and
try to start the engine again. If the engine
still fails to start, see page 66.
5. Pull the manual starter handle slowly until
you feel resistance. Then give a strong
pull straight out to crank and start the en-
gine. Repeat if necessary.
EMU27642
Electric start / remote control models
1. Place the remote control lever in neutral.
30
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Operation
3. Turn the main switch to “ ” (on).
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neu-
tral.
ON
OFF
2. Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the en-
gine stop switch.
EWM00120
ZMU01880
WARNING
4. Open the throttle slightly without shifting
using the neutral throttle lever or free ac-
celerator. You may need to change the
throttle opening slightly depending on en-
gine temperature. After the engine starts,
return the throttle to the original position.
G Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
G Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entan-
gled, preventing it from functioning.
G Avoid accidentally pulling the lanyard
during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
31
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Operation
NOTE:
G On remote controls equipped with a neutral
throttle lever, a good starting point is to lift
the lever just until you feel resistance, then
lift slightly more.
G The neutral throttle lever or free accelerator
can only be used when the remote control
lever is in neutral.
5. Press in and hold the main switch to op-
erate the remote choke system. The re-
mote choke switch automatically returns
to its normal position when you release
your hand. Therefore keep the switch
pressed in.
7. Immediately after the engine starts, re-
lease the main switch and allow it to re-
turn to “ ” (on).
ECM00191
CAUTION:
G Never turn the main switch to “
”
(start) while the engine is running.
G Do not keep the starter motor turning for
more than 5 seconds. If the starter motor
is turned continuously for more than 5
seconds, the battery will be quickly dis-
charged, thus making it impossible to
start the engine. The starter can also be
damaged. If the engine will not start after
5 seconds of cranking, return the main
switch to “ ” (on), wait 10 seconds,
then crank the engine again.
NOTE:
G It is not necessary to use the choke when
starting a warm engine.
EMU27670
Warming up engine
EMU27731
G Push in the main switch fully, or the remote
choke system will not operate.
Manual start models
1. After starting the engine, return the choke
knob to the halfway position. For approx-
imately the first 5 minutes after starting,
warm up the engine by operating at one
fifth throttle or less. After the engine has
warmed up, push the choke knob in fully.
Failure to do so will shorten engine life.
6. Turn the main switch to “
” (start),
and hold it for a maximum of 5 seconds.
NOTE:
G If the choke knob is left pulled out after the
engine starts, the engine will stall.
32
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Operation
ECM00220
G In temperatures of -5°C or less, leave the
choke knob pulled out fully for approximate-
ly 30 seconds after starting.
CAUTION:
To change the boat direction or shifting
position from forward to reverse or vice-
versa, first close the throttle so that the en-
gine idles (or runs at low speeds).
2. Check for a steady flow of water from the
cooling water pilot hole.
ECM00510
EMU27763
CAUTION:
Forward (tiller handle and remote
control models)
Tiller control models
1. Place the throttle grip in the fully closed
position.
A flow of water from the hole on the ex-
haust cover shows that the water pump is
pumping water through the cooling pas-
sages. If water is not flowing out of the
hole at all times while the engine is run-
ning, overheating and serious damage
could occur. Stop the engine and check
whether the cooling water inlet on the low-
er case or the cooling water pilot hole is
blocked. Consult your Yamaha dealer if
the problem cannot be located and cor-
rected.
ZMU02030
2. Move the gear shift lever quickly and firm-
ly from neutral to forward.
EMU27740
Shifting
EWM00180
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
Remote control models
Pull up the neutral interlock trigger (if
equipped) and move the remote control lever
quickly and firmly from neutral to forward.
33
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Operation
ERMeU2v77e95rse (manual tilt and hydro tilt
3. Move the gear shift lever quickly and firm-
ly from neutral to reverse.
models)
EWM00190
WARNING
When operating in reverse, go slowly. Do
not open the throttle more than half. Other-
wise the boat could become unstable,
which could result in loss of control and
an accident.
Tiller control models
1. Place the throttle grip in the fully closed
position.
Remote control models
1. Check that the tilt lock lever is in the lock
position.
ZMU02030
2. On models equipped with a tilt lock lever,
check that it is in the lock/down position.
2. Pull up the neutral interlock trigger (if
equipped) and move the remote control
lever quickly and firmly from neutral to re-
verse.
34
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Operation
EMU27820
3. Disconnect the fuel line if you are using
an external fuel tank.
Stopping engine
Before stopping the engine, first let it cool off
for a few minutes at idle or low speed. Stop-
ping the engine immediately after operating at
high speed is not recommended.
EPMrUo27c83e2 dure
1. Push and hold the engine stop button un-
til the engine comes to a complete stop.
NOTE:
If the outboard motor is equipped with an en-
gine stop switch lanyard, the engine can also
be stopped by pulling the lanyard and remov-
ing the lock plate from the engine stop switch.
EPMrUo27c851edure
1. Turn the main switch to “
2. After stopping the engine, tighten the air
vent screw on the fuel tank cap and set
the fuel cock lever or knob to the closed
position, if equipped.
” (off).
35
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Operation
2. After stopping the engine, disconnect the
fuel line or close the fuel cock if there is a
fuel joint or a fuel cock on the boat.
3. Tighten the air vent screw on the fuel tank
cap (if equipped).
4. Remove the key if the boat will be left un-
attended.
NOTE:
The engine can also be stopped by pulling the
lanyard and removing the clip from the engine
stop switch, then turning the main switch to
“
” (off).
EMU27T861rimming outboard motor
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help im-
prove performance and fuel economy while
reducing strain on the engine. Correct trim an-
gle depends upon the combination of boat,
engine, and propeller. Correct trim is also af-
fected by variables such as the load in the
1
ZMU02043
1. Trim operating angle
EAMdU2j7u871sting trim angle for manual tilt
models
There are 4 or 5 holes provided in the clamp
bracket to adjust the outboard motor trim an-
gle.
boat, sea conditions, and running speed.
EWM00740
WARNING
Excessive trim for the operating condi-
tions (either trim up or trim down) can
cause boat instability and can make steer-
ing the boat more difficult. This increases
the possibility of an accident. If the boat
begins to feel unstable or is hard to steer,
slow down and/or readjust the trim angle.
1. Stop the engine.
2. Remove the trim rod from the clamp
bracket while slightly tilting the outboard
motor up.
1. Trim rod
36
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Operation
3. Reposition the rod in the desired hole.
To raise the bow (“trim-out”), move the rod
away from the transom.
To lower the bow (“trim-in”), move the rod to-
ward the transom.
G Use the power tilt switch located on the
bottom engine cowling (if equipped)
only when the boat is at a complete stop
with the engine off.
Tilt the engine to the desired angle using the
power tilt switch.
Make test runs with the trim set to different an-
gles to find the position that works best for
your boat and operating conditions.
EWM00400
WARNING
G Stop the engine before adjusting the
trim angle.
G Use care to avoid being pinched when
removing or installing the rod.
G Use caution when trying a trim position
for the first time. Increase speed gradu-
ally and watch for any signs of instability
or control problems. Improper trim an-
gle can cause loss of control.
NOTE:
The outboard motor trim angle can be
changed approximately 4 degrees by shifting
the trim rod one hole.
EAMdU2j7u901sting trim angle (power tilt
models)
EWM00750
WARNING
G Be sure all people are clear of the out-
board motor when adjusting the tilt an-
gle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
G Use caution when trying a trim position
for the first time. Increase speed gradu-
ally and watch for any signs of instability
or control problems. Improper trim an-
gle can cause loss of control.
37
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Operation
mance further, and the boat may “porpoise”
(hop in the water), which could throw the op-
erator and passengers overboard.
NOTE:
Stay within the trim operating angle when
trimming the outboard motor using the power
tilt system.
To raise the bow (“trim-out”), tilt the engine up.
To lower the bow (“trim-in”), tilt the engine
down.
Make test runs with the trim set to different an-
gles to find the position that works best for
your boat and operating conditions.
EAMdU2j7u91s1 ting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi-
ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden-
cy to steer to one side or the other. Compen-
sate for this as you steer. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operat-
ing with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making opera-
tion difficult and dangerous.
Bow Up
NOTE:
Too much trim-out puts the bow of the boat
too high in the water. Performance and econ-
omy are decreased because the hull of the
boat is pushing the water and there is more air
drag. Excessive trim-out can also cause the
propeller to ventilate, which reduces perfor-
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27931
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propel-
38
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Operation
ler and casing from damage by collision with 2. Disconnect the fuel line from the out-
obstructions, and also to reduce salt corro-
board motor.
sion.
EWM00220
WARNING
Be sure all people are clear of the out-
board motor when tilting up and down,
also be careful not to pinch any body parts
between the drive unit and engine bracket.
EWM00250
WARNING
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon-
nect the fuel line or close the fuel cock if
the engine will be tilted for more than a few
minutes. Otherwise fuel may leak.
3. Place the tilt lock lever (if equipped) in the
release/up position.
ECM00241
CAUTION:
G Before tilting the outboard motor, stop
the engine by following the procedure
on page 35. Never tilt the outboard mo-
tor while the engine is running. Severe
damage from overheating can result.
G Do not tilt up the engine by pushing the
tiller handle (if equipped) because this
could break the handle.
4. Pull up the shallow water lever (if
equipped).
5. Hold the rear of the top cowling with one
hand and tilt the engine up fully.
6. Push the tilt support knob into the clamp
bracket. Or the tilt support bar will turn to
the lock position automatically.
EPMrUo27c97e5 dure for tilting up (manual tilt
models)
1. Place the gear shift lever in neutral.
39
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Operation
EPMrUo28c00e4 dure for tilting up
Power trim and tilt models / power tilt models
1. Place the remote control lever / the gear
shift lever in neutral.
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever toward
you to support the engine.
2. Disconnect the fuel line from the out-
board motor or close the fuel cock.
3. Press the power trim and tilt switch / pow-
er tilt switch “ ” (up) until the outboard
motor has tilted up completely.
EWM00260
WARNING
After tilting the outboard motor, be sure to
support it with the tilt support knob or tilt
support lever. Otherwise the outboard mo-
tor could fall back down suddenly if oil in
the power trim and tilt unit loses pressure.
5. Models equipped with trim rods: Once the
outboard motor is supported with the tilt
support lever, press the power trim and
tilt switch “ ” (down) to retract the trim
rods.
ECM00250
CAUTION:
Be sure to retract the trim rods completely
during mooring. This protects the rods
from marine growth and corrosion which
could damage the power trim and tilt
mechanism.
EPMrUo30c19e0 dure for tilting down (manual tilt
models)
1. Place the tilt lock lever in the lock posi-
tion.
40
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Operation
UP
DN
DN
ZMU01936
2. Slightly tilt the engine up until the tilt sup-
port bar is automatically released.
3. Slowly tilt the engine down.
EPMrUo28c05e2 dure for tilting down
Power trim and tilt models / power tilt models
1. Push the power tilt / power trim and tilt
switch “ ” (up) until the outboard motor
is supported by the tilt rod and the tilt sup-
port lever / tilt support knob becomes
free.
2. Release the tilt support lever or pull out
the tilt support knob.
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
ECMrUu280i7s1ing in shallow water (manual tilt
3. Push the power tilt / power trim and tilt
switch “ ” (down) to lower the outboard
motor to the desired position.
models)
EWM00710
WARNING
G Place the gear shift in neutral before us-
ing the shallow water cruising system.
41
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Operation
G Run the boat at the lowest possible
speed when using the shallow water
cruising system. The tilt lock mecha-
nism does not work while the shallow
water cruising system is being used. Hit-
ting an underwater obstacle could
cause the outboard motor to lift out of
the water, resulting in loss of control.
G Do not rotate the outboard motor 180°
and operate the boat in reverse. Place
the gear shift in reverse to operate the
boat in reverse.
2. Place the tilt lock lever in the release/up
position.
G Use extra care when operating in re-
verse. Too much reverse thrust can
cause the outboard motor to lift out of
the water, increasing the chance of acci-
dent and personal injury.
G Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
ECM00260
CAUTION:
3. Slightly tilt the outboard motor up. The tilt
support bar will lock automatically, sup-
porting the outboard motor in a partially
raised position.
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set-
ting up for and cruising in shallow water.
Otherwise severe damage from overheat-
ing can result.
NOTE:
This outboard motor has 2 positions for shal-
low water cruising.
ZMU02047
EMU28123
Procedure
1. Place the gear shift lever in neutral.
42
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Operation
EMU28183
4. To return the outboard motor to the nor-
mal running position, place the gear shift
lever in neutral, then place the tilt lock le-
ver in the lock/down position.
Procedure for power trim and tilt / power
tilt models
1. Place the gear shift lever in neutral.
2. Slightly tilt the outboard motor up to the
desired position using the power trim / tilt
switch.
5. Slightly tilt the outboard motor up until the
tilt support bar automatically returns to
the free position.
6. Slowly lower the outboard motor to the
normal position.
UP
EPMoU2w809e0 r trim and tilt models / power tilt
models
UP
DN
The outboard motor can be tilted up partially
to allow operation in shallow water.
EWM00660
WARNING
ZMU01935
G Place the gear shift in neutral before set-
ting up for shallow water cruising.
G Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
ECM00260
CAUTION:
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when set-
ting up for and cruising in shallow water.
Otherwise severe damage from overheat-
ing can result.
43
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Operation
3. To return the outboard motor to the nor-
mal running position, press the power
trim / tilt switch and slowly tilt the out-
board motor down.
EMU28190
Cruising in other conditions
Cruising in salt water
After operating in salt water, wash out the
cooling water passages with fresh water to
prevent them from becoming clogged with salt
deposits.
NOTE:
For cooling system flushing instructions, see
page 46.
Cruising in turbid water
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
if you use the outboard motor in turbid (mud-
dy) water conditions.
44
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Maintenance
EMU28213
Weight (AL) L:
Specifications
F6MHD 39.5 kg (87 lb)
F8MHD 39.5 kg (87 lb)
T8EHD 46.5 kg (103 lb)
T8PRD 49.0 kg (108 lb)
T8PHD 52.0 kg (115 lb)
Weight (AL) X:
T8EHD 47.5 kg (105 lb)
T8PRD 50.0 kg (110 lb)
T8PHD 53.0 kg (117 lb)
Performance:
Full throttle operating range:
F6MHD 4500–5500 r/min
F8MHD 5000–6000 r/min
T8PRD 5000–6000 r/min
T8PHD 5000–6000 r/min
T8EHD 5000–6000 r/min
Maximum output:
Dimension:
Overall length:
F6MHD 1038 mm (40.9 in)
F8MHD 1038 mm (40.9 in)
T8PHD 1038 mm (40.9 in)
T8PRD 552 mm (21.7 in)
T8EHD 1038 mm (40.9 in)
Overall width:
F6MHD 371 mm (14.6 in)
F8MHD 371 mm (14.6 in)
T8PRD 312 mm (12.3 in)
T8PHD 371 mm (14.6 in)
T8EHD 371 mm (14.6 in)
Overall height S:
F6MHD 998 mm (39.3 in)
F8MHD 998 mm (39.3 in)
Overall height L:
F6MHD 1125 mm (44.3 in)
F8MHD 1125 mm (44.3 in)
T8PRD 1187 mm (46.7 in)
T8PHD 1187 mm (46.7 in)
T8EHD 1187 mm (46.7 in)
Overall height X:
F6MHD 4.4 kW@5000 r/min (6 HP@5000
r/min)
F8MHD 5.9 kW@5500 r/min (8 HP@5500
r/min)
T8PRD 5.9 kW@5500 r/min (8 HP@5500
r/min)
T8PHD 5.9 kW@5500 r/min (8 HP@5500
r/min)
T8PRD 1255 mm (49.4 in)
T8PHD 1255 mm (49.4 in)
T8EHD 1255 mm (49.4 in)
Transom height S:
F6MHD 435 mm (17.1 in)
F8MHD 435 mm (17.1 in)
Transom height L:
T8EHD 5.9 kW@5500 r/min (8 HP@5500
r/min)
Idling speed (in neutral):
1050 50 r/min
Engine:
Type:
F6MHD 562 mm (22.1 in)
F8MHD 562 mm (22.1 in)
T8PRD 557 mm (21.9 in)
T8PHD 557 mm (21.9 in)
T8EHD 557 mm (21.9 in)
Transom height X:
4-stroke L
Displacement:
197.0 cm³ (12.02 cu.in)
Bore × stroke:
56.0 × 40.0 mm (2.20 × 1.57 in)
Ignition system:
T8PRD 625 mm (24.6 in)
T8PHD 625 mm (24.6 in)
T8EHD 625 mm (24.6 in)
Weight (AL) S:
CDI
Spark plug (NGK):
BR6HS-10
Spark plug gap:
F6MHD 38.0 kg (84 lb)
F8MHD 38.0 kg (84 lb)
0.9–1.0 mm (0.035–0.039 in)
Control system:
F6MHD Tiller
F8MHD Tiller
T8PRD Remote control
T8PHD Tiller
T8EHD Tiller
45
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Maintenance
Starting system:
F6MHD Manual
F8MHD Manual
Recommended fuel:
Unleaded regular gasoline
Min. pump octane:
T8PRD Electric
86
T8PHD Electric
Recommended engine oil:
4-stroke outboard motor oil
Engine oil grade API:
API SE, SF, SG, SH, SJ
Engine oil type SAE:
SAE10W30 or SAE10W40
Lubrication:
Wet sump
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
T8EHD Manual and electric
Starting carburetion system:
Choke valve
Valve clearance (cold engine) IN:
0.15–0.20 mm (0.0059–0.0079 in)
Valve clearance (cold engine) EX:
0.20–0.25 mm (0.0079–0.0098 in)
Battery:
Min. cold cranking amps (CCA/SAE):
T8PRD 245.0 A
T8PHD 245.0 A
T8EHD 245.0 A
F6MHD 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)
F8MHD 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)
T8PRD 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
Min. marine cranking amps (MCA/ABYC):
T8PRD 323.0 A
T8PHD 323.0 A
T8EHD 323.0 A
T8PHD 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
T8EHD 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
Min. reserve capacity (RC/SAE):
T8PRD 52 minutes
T8PHD 52 minutes
T8EHD 52 minutes
Alternator output for battery DC:
6.0 A
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
Drive unit:
Gear positions:
F6MHD 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)
F8MHD 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)
T8PRD 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
T8PHD 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
T8EHD 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
Engine oil drain bolt:
Forward-neutral-reverse
Gear ratio:
F6MHD 2.08 (27/13)
F8MHD 2.08 (27/13)
T8PRD 2.92 (38/13)
T8PHD 2.92 (38/13)
T8EHD 2.92 (38/13)
Trim and tilt system:
F6MHD Manual tilt
F8MHD Manual tilt
T8PRD Power tilt
24.0 Nm (17.7 ft-lb) (2.45 kgf-m)
EMU28222
Transporting and storing
outboard motor
EWM00690
T8PHD Power tilt
T8EHD Manual tilt
Propeller mark:
F6MHD N
F8MHD N
T8PRD R
T8PHD R
T8EHD R
WARNING
G Leaking fuel is a fire hazard. When trans-
porting and storing the outboard motor,
close the air vent screw and fuel cock to
prevent fuel from leaking.
G USE CARE when transporting fuel tank,
whether in a boat or car.
Fuel and oil:
46
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Maintenance
G DO NOT fill fuel container to maximum
capacity. Gasoline will expand consider-
ably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
EWM00700
WARNING
Never get under the lower unit while it is
tilted, even if a motor support bar is used.
Severe injury could occur if the outboard
motor accidentally falls.
ECM00660
CAUTION:
Do not use the tilt support lever or knob
when trailering the boat. The outboard mo-
tor could shake loose from the tilt support
and fall. If the motor cannot be trailered in
the normal running position, use an addi-
tional support device to secure it in the tilt
position.
NOTE:
Place a towel or something similar under the
outboard motor to protect it from damage.
The outboard motor should be trailered and
stored in the normal running position. If there
is insufficient road clearance in this position,
then trailer the outboard motor in the tilt posi-
tion using a motor support device such as a
transom saver bar. Consult your Yamaha
dealer for further details.
ECMlUa28m235p screw mounting models
When transporting or storing the outboard
motor while removed from a boat, keep the
outboard motor in the attitude shown.
ESMtUo28r24i1ng outboard motor
When storing your Yamaha outboard motor
for prolonged periods of time (2 months or
longer), several important procedures must
be performed to prevent excessive damage.
It is advisable to have your outboard motor
serviced by an authorized Yamaha dealer pri-
or to storage. However, you, the owner, with a
minimum of tools, can perform the following
procedures.
ECM01080
CAUTION:
G To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
47
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Maintenance
the outboard motor on its side (not up-
right), put it on a cushion after draining
the engine oil.
G Do not place the outboard motor on its
side before the cooling water has
water may enter the cylinder through the
exhaust port and cause engine trouble.
G Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
1
2
ZMU02051
1. Water surface
2. Lowest water level
EPMrUo28c30e1 dure
EMU28371
5. Fill the tank with fresh water to above the
Flushing in a test tank
level of the anti-cavitation plate.
ECM00300
1. Wash the outboard motor body using
fresh water. For further information, see
page 51.
2. Fill the fuel tank with fresh fuel and add
one ounce of “Yamaha Fuel Conditioner
and Stabilizer” (Part No. LUB-FUELC-12-
00) to each gallon of fuel.
CAUTION:
Do not run the engine without supplying it
with cooling water. Either the engine water
pump will be damaged or the engine will
be damaged from overheating. Before
starting the engine, be sure to supply wa-
ter to the cooling water passages.
NOTE:
The use of “Yamaha Fuel Conditioner and
Stabilizer” eliminates the need to drain the
fuel system. Consult your Yamaha dealer or
other qualified mechanic if the fuel system is
to be drained instead.
ECM00290
CAUTION:
If the fresh water level is below the level of
the anti-cavitation plate, or if the water
supply is insufficient, engine seizure may
3. Remove the engine top cowling and si- occur.
lencer cover.
4. Install the outboard motor on the test
tank.
6. Cooling system flushing is essential to
prevent the cooling system from clogging
up with salt, sand, or dirt. In addition, fog-
ging of the engine is mandatory to pre-
vent excessive engine damage due to
rust. Perform the flushing and fogging at
the same time.
EWM00090
WARNING
G Do not touch or remove electrical parts
when starting or during operation.
48
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Maintenance
ECM01330
G Keep hands, hair, and clothes away from
the flywheel and other rotating parts
while the engine is running.
CAUTION:
If equipped Electronic Fuel Injection: Do
not spray when the engine is running. Al-
so, do not spray near the silencer and ox-
ygen sensor cover or into the engine.
Otherwise the oxygen sensor for Electron-
ic Fuel Injection system could be dam-
aged.
7. Run the engine at a fast idle for 10–15
minutes in neutral position.
8. Just prior to turning off the engine, quickly
spray “Yamaha Stor-Rite Engine Fogging
Oil” (Part No. LUB-STRRT-12-00) alter-
nately into each carburetor or the fogging
hole of the silencer cover, if equipped.
When properly done, the engine will
smoke excessively and almost stall.
9. Remove the outboard motor from the test
tank.
3. Wax the cowling with a non-abrasive wax
such as “Yamaha Silicone Wax” (Part No.
ACC-11000-15-02).
EBMaU2t8t43e0ry care
EWM00330
10. Install the silencer cover/cap and top
cowling.
EMU28400
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poi-
sonous and highly caustic.
Lubrication (except oil injection
models)
Always follow these preventive measures:
G Avoid bodily contact with electrolytic
fluid as it can cause severe burns or per-
manent eye injury.
the spark plug(s) and torque to proper
specification. For information on spark
plug installation, see page 55.
G Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):
2. Change the gear oil. For instructions, see
page 61. Inspect the oil for the presence
of water that indicates a leaky seal. Seal
replacement should be performed by an
authorized Yamaha dealer prior to use.
3. Grease all grease fittings. For further de-
tails, see page 54.
G SKIN - Flush with water.
G EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
ECMlUe28a42n0 ing and anticorrosion measures
1. Wash down the exterior of the outboard
motor with fresh water and dry off com-
pletely.
2. Spray the outboard motor exterior with
“Yamaha Silicone Protectant” (Part No.
LUB-SILCNE-13-00).
G Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydro-
gen gas; therefore, you should always fol-
low these preventive measures:
G Charge batteries in a well-ventilated ar-
ea.
49
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Maintenance
G Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
G DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
Batteries vary among manufacturers. There-
fore the following procedures may not always
apply. Consult your battery manufacturer’s in-
structions.
Procedure
1. Disconnect and remove the battery from
the boat. Always disconnect the black
negative cable first to prevent the risk of
shorting.
2. Clean the battery casing and terminals.
Fill each cell to the upper level with dis-
tilled water.
3. Store the battery on a level surface in a
cool, dry, well-ventilated place out of di-
rect sunlight.
1. Fitting
2. Garden hose connector
3. Garden hose
2. Screw the garden hose connector onto a
garden hose which is connected to a
fresh water supply.
4. Once a month, check the specific gravity
of the electrolyte and recharge as re-
3. With the engine off, turn on the water tap
and let the water flush through the cool-
ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose.
4. When flushing is complete, reinstall the
garden hose connector on the fitting on
the bottom cowling. Tighten the connec-
quired to prolong battery life.
EMU28440
Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
1. After shutting off the engine, unscrew the
garden hose connector from the fitting on
the bottom cowling.
tor securely.
ECM00540
CAUTION:
Do not leave the garden hose connector
loose on the bottom cowling fitting or let
the hose hang free during normal opera-
tion. Water will leak out of the connector
instead of cooling the engine, which can
50
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Maintenance
EMU28483 Periodic maintenance
connector is tightened securely on the fit-
ting after flushing the engine.
EWM01070
WARNING
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you or the owner is not famil-
iar with machine servicing, this work
should be done by your Yamaha dealer or
other qualified mechanic.
NOTE:
G When flushing the engine with the boat in
the water, tilting up the outboard motor until
it is completely out of the water will achieve
better results.
G For cooling system flushing instructions,
see page 46.
Maintenance, replacement, or repair of the
emission control devices and systems
may be performed by any marine engine
repair establishment or individual. All war-
ranty repairs, however, including those to
the emission control system, must be per-
formed by an authorized Yamaha marine
dealership.
ECMlUe28a45n0 ing the outboard motor
After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling sys-
tem with fresh water.
A service manual is available for purchase
through your Yamaha dealer for owners who
have the mechanical skills, tools, and other
equipment necessary to perform mainte-
nance not covered by this owner’s manual.
ERMeU2p85l1a0 cement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of the same
type and of equivalent strength and materials.
Any part of inferior quality may malfunction,
and the resulting loss of control could endan-
ger the operator and passengers. Yamaha
genuine parts and accessories are available
from your Yamaha dealer.
ZMU02052
NOTE:
For cooling system flushing instructions, see
page 46.
ECMhU2e84c60king painted surface of motor
Check the motor for scratches, nicks, or flak-
ing paint. Areas with damaged paint are more
likely to corrode. If necessary, clean and paint
the areas. A touch-up paint is available from
your Yamaha dealer.
51
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Maintenance
EMU28521
Maintenance chart
Frequency of maintenance operations may be adjusted according to the operating conditions,
but the following table gives general guidelines. Refer to the sections in this chapter for expla-
nations of each owner-specific action.
The “ ” symbol indicates the check-ups which you may carry out yourself.
The “ ” symbol indicates work to be carried out by your Yamaha dealer.
Initial
Every
Item
Actions
Inspection /
10 hours 50 hours 100 hours 200 hours
(1 month) (3 months) (6 months) (1 year)
Anode(s) (external)
replacement
Inspection /
replacement
Anode(s) (internal)
Battery
Inspection / charging
Cooling water
passages
Cleaning
Cowling clamp
Inspection
Inspection /
replacement
Fuel filter (disposable)
Fuel system
Inspection
Fuel tank (Yamaha
portable tank)
Inspection / cleaning
Gear oil
Change
Greasing points
Greasing
Idling speed
(carburetor models)
Inspection / adjustment
Power trim and tilt unit
Inspection
Inspection /
replacement
Propeller and cotter pin
Shift link / shift cable
Thermostat
Inspection / adjustment
Inspection
Throttle link / throttle
cable / throttle pick-up
timing
Inspection / adjustment
Water pump
Engine oil
Inspection
Inspection / change
Oil filter (built into oil
pan)
Inspection / cleaning /
change
Cleaning / adjustment /
replacement
Inspection /
replacement
Spark plug(s)
Timing belt
52
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Maintenance
Initial
10 hours
Every
Item
Actions
50 hours 100 hours 200 hours
(1 month) (3 months) (6 months) (1 year)
Valve clearance (OHC,
OHV)
Inspection / adjustment
NOTE:
When operating in salt water, turbid or muddy water, the engine should be flushed with clean
water after each use.
EMU28871
Maintenance chart (additional)
Every
Item
Timing belt
Actions
Replacement
500 hours (2.5 years)
1000 hours (5 years)
53
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Maintenance
ECMlUe28a95n0 ing and adjusting spark plug
EWM00560
WARNING
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if the
center electrode porcelain is very white, this
could indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to di-
agnose any problems yourself. Instead, take
the outboard motor to a Yamaha dealer. You
should periodically remove and inspect the
spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes ex-
cessive, or if carbon and other deposits are
excessive, you should replace the spark plug
with another of the correct type.
1. Spark plug gap
2. Spark plug I.D. mark (NGK)
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
When fitting the plug, always clean the gasket
surface and use a new gasket. Wipe off any
dirt from the threads and screw in the spark
plug to the correct torque.
Spark plug torque:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
NOTE:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 a turn past finger-
tight. Have the spark plug adjusted to the cor-
rect torque as soon as possible with a torque-
wrench.
Standard spark plug:
BR6HS-10
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
ECMhU2e89c61king fuel system
EWM00900
WARNING
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
EWM00910
WARNING
Leaking fuel can result in fire or explosion.
55
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Maintenance
G Check for fuel leakage regularly.
G If any fuel leakage is found, the fuel sys-
tem must be repaired by a qualified me-
chanic. Improper repairs can make the
outboard unsafe to operate.
Check the fuel lines for leaks, crack, or mal-
function. If a problem is found, your Yamaha
dealer or other qualified mechanic should re-
pair it immediately.
EInMUs29p04e0 cting idling speed
EWM00450
WARNING
G Do not touch or remove electrical parts
when starting or during operation.
G Keep hands, hair, and clothes away from
the flywheel and other rotating parts
while the engine is running.
G 2-hp models: The propeller rotates
whenever the engine is running. Do not
move the throttle control lever from the
start position during warm-up. The boat
could unexpectedly start to move, which
could result in an accident.
ECM00490
CAUTION:
This procedure must be performed while
the outboard motor is in the water. A flush-
ing attachment or test tank can be used.
Checkpoints
G Fuel system parts leakage
G Fuel line joint leakage
G Fuel line cracks or other damage
G Fuel connector leakage
ECMhU2e89c90king fuel filter
A diagnostic tachometer should be used for
this procedure. Results may vary depending
on whether testing is conducted with the
flushing attachment, in a test tank, or with the
outboard motor in the water.
Check the fuel filter periodically. The fuel filter
is a one piece, disposable type. If foreign mat-
ter is found in the filter, replace it. For replace-
ment of the fuel filter, consult your Yamaha
dealer.
1. Start the engine and allow it to warm up
fully in neutral until it is running smoothly.
2-hp model: Warm the engine with the
throttle in the start position or less. If the
outboard is mounted on a boat, be sure
the boat is tightly moored.
56
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Maintenance
NOTE:
Correct idling speed inspection is only possi-
ble if the engine is fully warmed up. If not
warmed up fully, the idle speed will measure
higher than normal. If you have difficulty veri-
fying the idle speed, or the idle speed requires
adjustment, consult a Yamaha dealer or other
qualified mechanic.
2. Verify whether the idle speed is set to
specification. For idle speed specifica-
tions, see page 45.
2. Prepare a suitable container that holds a
larger amount than the engine oil capaci-
ty. Loosen and remove the drain screw
while holding the container under the
drain hole. Then remove the oil filler cap.
Let the oil drain completely. Wipe up any
spilled oil immediately.
ECMhU2a90n72ging engine oil
EWM00760
WARNING
G Avoid draining the engine oil immediate-
ly after stopping the engine. The oil is
hot and should be handled with care to
avoid burns.
G Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
ECM00970
CAUTION:
G Do not overfill the oil, and be sure the
outboard motor is upright (not tilted)
when checking and changing the engine
oil.
G If the oil level is above the upper level
mark, drain until the level meets the
specified capacity. Overfilling the oil
could cause leakage or damage.
1. Drain screw
3. Put a new gasket on the oil drain screw.
Apply a light coat of oil to the gasket and
install the drain screw.
Drain screw tightening torque:
24.0 Nm (17.7 ft-lb) (2.45 kgf-m)
1. Put the outboard motor in an upright po-
sition (not tilted).
NOTE:
If a torque wrench is not available when you
are installing the drain screw, finger tighten
the screw just until the gasket comes into con-
tact with the surface of the drain hole. Then
57
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Maintenance
tighten 1/4 to 1/2 turn more. Tighten the drain
screw to the correct torque with a torque
wrench as soon as possible.
4. Add the correct amount of oil through the
filler hole. Install the filler cap.
Recommended engine oil:
4-stroke outboard motor oil
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
ZMU02058
7. Dispose of used oil according to local
regulations.
NOTE:
G For more information on the disposal of
used oil, consult your Yamaha dealer.
G Change the oil more often when operating
the engine under adverse conditions such
as extended trolling.
ECMhU2e91c11king wiring and connectors
G Check that each grounding wire is properly
secured.
G Check that each connector is engaged se-
curely.
1. Oil filler cap
5. Start the engine and watch to make sure
the low oil pressure warning indicator (if
equipped) turns off. Make sure that there
are no oil leaks.
ECM00680
CAUTION:
If the low oil pressure warning indicator
does not turn off or if there are oil leaks,
stop the engine and find the cause. Con-
tinued operation with a problem could
cause severe engine damage. Consult
your Yamaha dealer if the problem cannot
be located and corrected.
EEMxU2h91a20ust leakage
Start the engine and check that no exhaust
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
6. Turn off the engine and wait 3 minutes.
Recheck the oil level using the dipstick to
be sure the level falls between the upper
and lower marks. Fill with oil if it is below
the lower mark, or drain to the specified
level if it is above the upper mark.
58
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Maintenance
EMU29130
3. Tilt the outboard motor up and check that
the trim and tilt rod is pushed out com-
pletely.
4. Check that the trim and tilt rod is free of
corrosion or other flaws.
Water leakage
Start the engine and check that no water
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
EEMnU2g91i4n0 e oil leakage
5. Tilt the outboard motor down. Check that
the trim and tilt rod operates smoothly.
Check for oil leaks on the around the engine.
NOTE:
NOTE:
If any leaks are found, consult your Yamaha Consult your Yamaha dealer if any operation
dealer.
is abnormal.
ECMhU2e91c61king power trim and tilt system
ECMhU2e91c71king propeller
EWM00430
EWM00321
WARNING
WARNING
G Never get under the lower unit while it is You could be seriously injured if the en-
tilted, even when the tilt support lever is gine accidentally starts when you are near
locked. Severe injury could occur if the the propeller.
outboard motor accidentally falls.
G Make sure no one is under the outboard
motor before performing this test.
G Before inspecting, removing, or install-
ing the propeller, remove the spark plug
caps from the spark plugs. Also, place
the shift control in neutral, turn the main
1. Check the power trim and tilt unit for any
sign of oil leaks.
switch to “
” (off) and remove the key,
and remove the lanyard from the engine
stop switch. Turn off the battery cut-off
switch if your boat has one.
G Do not use your hand to hold the propel-
ler when loosening or tightening the
propeller nut. Put a wood block between
the anti-cavitation plate and the propel-
ler to prevent the propeller from turning.
1. Tilt rod
2. Operate each of the power trim and tilt
switches / the power tilt switches on the
remote control and engine bottom cowl-
ing (if equipped) to check that all switches
work.
59
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Maintenance
ERMeU2m919o3 ving the propeller
1. Straighten the cotter pin and pull it out us-
ing a pair of pliers.
2. Remove the propeller nut, washer, and
spacer (if equipped).
ZMU01897
Checkpoints
G Check each of the propeller blades for
wear, erosion from cavitation or ventilation,
or other damage.
G Check the propeller shaft for damage.
G Check the splines / shear pin for wear or
damage.
G Check for fish line tangled around the pro-
peller shaft.
1. Cotter pin
2. Propeller nut
3. Washer
4. Propeller
5. Thrust washer
G Check the propeller shaft oil seal for dam-
age.
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
NOTE:
If the shear pin equipped: it is designed to
break if the propeller hits a hard underwater
obstacle to help protect the propeller and
drive mechanism. The propeller will then spin 3. Remove the propeller and thrust washer.
freely on the shaft. If this happens, the shear
pin must be replaced.
60
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Maintenance
EInMUs29t2a30lling the propeller
ECMhU2a92n80ging gear oil
ECM00340
EWM00800
CAUTION:
WARNING
G Be sure to install the thrust washer be- G Be sure the outboard motor is securely
fore installing the propeller, otherwise
the lower case and propeller boss could
be damaged.
G Be sure to use a new cotter pin and bend
the ends over securely. Otherwise the
propeller could come off during opera-
tion and be lost.
fastened to the transom or a stable
stand. You could be severely injured if
the outboard motor falls on you.
G Never get under the lower unit while it is
tilted, even when the tilt support lever or
knob is locked. Severe injury could oc-
cur if the outboard motor accidentally
falls.
1. Apply Yamaha marine grease or a corro-
sion resistant grease to the propeller 1. Tilt the outboard motor so that the gear oil
shaft.
drain screw is at the lowest point possi-
ble.
2. Install the spacer(if equipped), thrust
washer, and propeller on the propeller 2. Place a suitable container under the gear
shaft.
case.
3. Install the spacer (if equipped) and the 3. Remove the gear oil drain screw.
washer. Tighten the propeller nut to the
specified torque.
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
2
1
ZMU02064
1. Gear oil drain screw
2. Oil level plug
NOTE:
If the magnetic gear oil drain screw equipped:
remove all metal particles from the screw be-
fore installing it.
ZMU02063
NOTE:
If the propeller nut does not align with the pro-
peller shaft hole after tightening to the speci-
fied torque, tighten the nut further to align it
with the hole.
4. Remove the oil level plug to allow the oil
to drain completely.
61
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Maintenance
ECM00710
7. Insert and tighten the gear oil drain
screw.
CAUTION:
ECMlUe29a30n2 ing fuel tank
Inspect the used oil after it has been
drained. If the oil is milky, water is getting
into the gear case which can cause gear
damage. Consult a Yamaha dealer for re-
pair of the lower unit seals.
EWM00920
WARNING
Gasoline is highly flammable, and its va-
pors are flammable and explosive.
G If you have any question about properly
doing this procedure, consult your
Yamaha dealer.
G Keep away from sparks, cigarettes,
flames, or other sources of ignition
when cleaning the fuel tank.
G Remove the fuel tank from the boat be-
fore cleaning it. Work only outdoors in
an area with good ventilation.
G Wipe up any spilled fuel immediately.
G Reassemble the fuel tank carefully. Im-
proper assembly can result in a fuel
leak, which could result in a fire or ex-
plosion hazard.
NOTE:
For disposal of used oil consult your Yamaha
dealer.
5. With the outboard motor in a vertical po-
sition, and using a flexible or pressurized
filling device, inject the gear oil into the
gear oil drain screw hole.
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F6MHD 150.0 cm³ (5.07 US oz) (5.29
Imp.oz)
F8MHD 150.0 cm³ (5.07 US oz) (5.29
Imp.oz)
T8PRD 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
G Dispose of old gasoline according to lo-
cal regulations.
T8PHD 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
T8EHD 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
1. Empty the fuel tank into an approved con-
tainer.
2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.
3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.
ZMU02065
6. When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
62
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Maintenance
ZMU02067
4. Clean the filter (located on the end of the
suction pipe) in a suitable cleaning sol-
vent. Allow the filter to dry.
5. Replace the gasket with a new one. Re-
install the fuel joint assembly and tighten
the screws firmly.
EInMUs29p31e2 cting and replacing anode(s)
Yamaha outboard motors are protected from
corrosion by sacrificial anodes. Inspect the
external anodes periodically. Remove scales
from the surfaces of the anodes. Consult a
Yamaha dealer for replacement of external
anodes.
ECM00720
CAUTION:
Do not paint anodes, as this would render
them ineffective.
NOTE:
Inspect ground leads attached to external an-
odes on equipped models. Consult a Yamaha
dealer for inspection and replacement of inter-
nal anodes attached to the power unit.
ECMhU2e93c20king battery (for electric start
models)
EWM00330
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poi-
sonous and highly caustic.
Always follow these preventive measures:
63
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Maintenance
G Avoid bodily contact with electrolytic
fluid as it can cause severe burns or per-
manent eye injury.
G Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):
G SKIN - Flush with water.
G EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
G Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydro-
gen gas; therefore, you should always fol-
low these preventive measures:
G Charge batteries in a well-ventilated ar-
ea.
G Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
G DO NOT SMOKE when charging or han-
dling batteries.
2. Always keep the battery in a good state of
charge. Installing a voltmeter will help
you monitor your battery. If you will not
use the boat for a month or more, remove
the battery from the boat and store it in a
cool, dark place. Completely recharge
the battery before using it.
3. If the battery will be stored for longer than
a month, check the specific gravity of the
fluid at least once a month and recharge
the battery when it is low.
NOTE:
Consult a Yamaha dealer when charging or
re-charging batteries.
ECMoU2n933n1ecting the battery
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
EWM00570
ECM00360
WARNING
CAUTION:
Mount the battery holder securely in a dry,
G A poorly maintained battery will quickly well-ventilated, vibration-free location in
deteriorate. the boat. Install a fully charged battery in
G Ordinary tap water contains minerals the holder.
harmful to a battery, and should not be
ECM01121
used for topping up.
CAUTION:
G Make sure the main switch (on applica-
1. Check the electrolyte level at least once a
month. Fill to the manufacturer’s recom-
mended level when necessary. Top up
only with distilled water (or pure de-ion-
ized water suitable to use in batteries).
ble models) is “
” (off) before working
on the battery.
G Reversal of the battery cables will dam-
age the electrical parts.
64
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Maintenance
G Connect the red battery cable first when tom can be coated with an anti-fouling paint
installing the battery and disconnect the approved for your area to inhibit marine
black battery cable first when removing growth.
it. Otherwise, the electrical parts can be Do not use anti-fouling paint which includes
damaged.
copper or graphite. These paints can cause
G The electrical contacts of the battery more rapid engine corrosion.
and cables must be clean and properly
connected, or the battery will not start
the engine.
Connect the red battery cable to the POSI-
TIVE (+) terminal first. Then connect the black
battery cable to the NEGATIVE (-) terminal.
ZMU01943
1. Red cable
2. Black cable
3. Battery
EDMiUs29c37o0 nnecting the battery
Disconnect the BLACK cable from the NEGA-
TIVE (-) terminal first. Then disconnect the
RED cable from the POSITIVE (+) terminal.
ECMhU2e93c90king top cowling
Check the fitting of the top cowling by pushing
it with both hands. If it is loose have it repaired
by your Yamaha dealer.
ECMoU2a94t00ing the boat bottom
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine
growth as possible. If necessary, the boat bot-
65
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Trouble Recovery
EMU29422
Q. Is fuel filter clogged?
A. Clean or replace filter.
Troubleshooting
A problem in the fuel, compression, or ignition
systems can cause poor starting, loss of pow-
er, or other problems. This section describes
basic checks and possible remedies, and cov-
ers all Yamaha outboard motors. Therefore
some items may not apply to your model.
If your outboard motor requires repair, bring it
to your Yamaha dealer.
Q. Is starting procedure incorrect?
A. See page 29.
Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.
If the engine trouble warning indicator is flash-
ing, consult your Yamaha dealer.
Starter will not operate.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of rec-
ommended capacity.
Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).
Q. Is ignition wiring damaged or poorly con-
nected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.
Q. Are battery connections loose or corrod-
ed?
A. Tighten battery cables and clean battery
terminals.
Q. Is fuse for electric start relay or electric cir-
cuit blown?
A. Check for cause of electric overload and
repair. Replace fuse with one of correct am-
perage.
Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer.
Q. Is engine stop switch lanyard not at-
tached?
A. Attach lanyard.
Q. Are starter components faulty?
A. Have serviced by a Yamaha dealer.
Q. Are engine inner parts damaged?
A. Have serviced by a Yamaha dealer.
Q. Is shift lever in gear?
A. Shift to neutral.
Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.
Engine will not start (starter operates).
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is fuel system obstructed?
66
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Trouble Recovery
A. Check for pinched or kinked fuel line or oth- A. Return to home position.
er obstructions in fuel system.
Q. Is motor angle too high?
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
A. Return to normal operating position.
Q. Is carburetor clogged?
Q. Is fuel filter clogged?
A. Clean or replace filter.
A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?
A. Connect correctly.
Q. Have ignition parts failed?
A. Have serviced by a Yamaha dealer.
Q. Is throttle valve adjustment incorrect?
A. Have serviced by a Yamaha dealer.
Q. Has warning system activated?
A. Find and correct cause of warning.
Q. Is battery cable disconnected?
A. Connect securely.
Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.
Warning buzzer sounds or indicator lights.
Q. Is ignition wiring damaged or poorly con- Q. Is cooling system clogged?
nected?
A. Check water intake for restriction.
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken Q. Is engine oil level low?
wires.
A. Fill oil tank with specified engine oil.
Q. Is specified engine oil not being used?
A. Check and replace oil as specified.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with rec-
ommended type.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Are carburetor adjustments incorrect?
A. Have serviced by a Yamaha dealer.
Q. Is engine oil contaminated or deteriorated?
A. Replace oil with fresh, specified type.
Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer.
Q. Is oil filter clogged?
A. Have serviced by a Yamaha dealer.
Q. Is air vent screw on fuel tank closed?
A. Open air vent screw.
Q. Has oil feed/injection pump malfunc-
tioned?
Q. Is choke knob pulled out?
A. Have serviced by a Yamaha dealer.
67
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Trouble Recovery
Q. Is load on boat improperly distributed?
A. Remove foreign matter and clean lower
A. Distribute load to place boat on an even unit.
plane.
Q. Is fuel system obstructed?
Q. Is water pump or thermostat faulty?
A. Have serviced by a Yamaha dealer.
A. Check for pinched or kinked fuel line or oth-
er obstructions in fuel system.
Q. Is there excess water in fuel filter cup?
A. Drain filter cup.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Engine power loss.
Q. Is propeller damaged?
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
A. Have propeller repaired or replaced.
Q. Is spark plug gap incorrect?
Q. Is propeller pitch or diameter incorrect?
A. Install correct propeller to operate outboard
at its recommended speed (r/min) range.
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly con-
nected?
Q. Is trim angle incorrect?
A. Check wires for wear or breaks. Tighten all
A. Adjust trim angle to achieve most efficient loose connections. Replace worn or broken
operation. wires.
Q. Is motor mounted at incorrect height on Q. Have ignition parts failed?
transom?
A. Have serviced by a Yamaha dealer.
A. Have motor adjusted to proper transom
height.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Has warning system activated?
A. Find and correct cause of warning.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Is boat bottom fouled with marine growth?
A. Clean boat bottom.
Q. Is air vent screw closed?
A. Open the air vent screw.
Q. Are spark plug(s) fouled or of incorrect
type?
Q. Is fuel pump damaged?
A. Inspect spark plug(s). Clean or replace with A. Have serviced by a Yamaha dealer.
recommended type.
Q. Is fuel joint connection incorrect?
Q. Are weeds or other foreign matter tangled A. Connect correctly.
on gear housing?
Q. Is heat range of spark plug incorrect?
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Trouble Recovery
A. Inspect spark plug and replace it with rec-
ommended type.
Q. Is high pressure fuel pump drive belt bro-
ken?
A. Have serviced by a Yamaha dealer.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.
1. Stop the engine immediately.
Engine vibrates excessively.
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
2. Inspect the control system and all compo-
nents for damage. Also inspect the boat
for damage.
3. Whether damage is found or not, return
to the nearest harbor slowly and careful-
ly.
Q. Is propeller shaft damaged?
A. Have serviced by a Yamaha dealer.
4. Have a Yamaha dealer inspect the out-
board motor before operating it again.
ERMeU2p94l6a2 cing fuse
If the fuse has blown on an electric start mod-
Q. Are weeds or other foreign matter tangled
on propeller?
A. Remove and clean propeller.
el, open the fuse holder and replace the fuse
with a new one of the proper amperage.
EWM00630
Q. Is motor mounting bolt loose?
A. Tighten bolt.
WARNING
Q. Is steering pivot loose or damaged?
A. Tighten or have serviced by a Yamaha
dealer.
Be sure to use the specified fuse. An in-
correct fuse or a piece of wire could allow
excessive current flow. This could cause
electric system damage and a fire hazard.
ETMeU29m431porary action in emergency
EImMU2p94a40ct damage
EWM00870
WARNING
The outboard motor can be seriously dam-
aged by a collision while operating or
trailering. Damage could make the out-
board motor unsafe to operate.
If the outboard motor hits an object in the wa-
ter, follow the procedure below.
1. Fuse box
69
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Trouble Recovery
G When the emergency starter rope is
used to start the engine, the start-in-
gear protection device does not operate.
Make sure the remote control lever is in
neutral. Otherwise the boat could unex-
pectedly start to move, which could re-
sult in an accident.
2. Fuse (10 A)
3. Spare fuse (10 A)
4. Fuse puller
NOTE:
Consult your Yamaha dealer if the new fuse
immediately blows again.
G Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
G Do not attach the lanyard to clothing
that could tear loose. Do not route the
cord where it could become entangled,
preventing it from functioning.
G Avoid accidentally pulling the lanyard
during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
EPMoU2w952e0 r trim and tilt will not operate
If the engine cannot be tilted up or down with
the power trim and tilt/ the power tilt because
of a discharged battery or a failure with the
power trim and tilt unit/the power tilt, the en-
gine can be tilted manually.
1. Loosen the manual valve screw by turn-
ing it counterclockwise until it stops.
G Be sure no one is standing behind you
when pulling the starter rope. It could
whip behind you and injure someone.
G An unguarded, rotating flywheel is very
dangerous. Keep loose clothing and
other objects away when starting the en-
gine. Use the emergency starter rope
only as instructed. Do not touch the fly-
wheel or other moving parts when the
engine is running. Do not install the
starter mechanism or top cowling after
the engine is running.
G Do not touch the ignition coil, spark plug
wire, spark plug cap, or other electrical
components when starting or operating
the motor. You could get an electrical
shock.
1. Manual valve screw
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
ESMtUa29r5t31er will not operate
If the starter mechanism does not operate
(the engine cannot be cranked with the start-
er), the engine can be started with an emer-
gency starter rope.
EWM01020
WARNING
G Use this procedure only in an emergen-
cy and only to return to port for repairs.
EEMmU29e56r1gency starting engine
1. Remove the top cowling.
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Trouble Recovery
2. Remove the start-in-gear protection ca-
ble from the starter, if equipped.
ON
OFF
ZMU01880
5. If equipped the choke knob, pull out it
when the engine is cold. After the engine
starts, gradually return the choke knob to
its home position as the engine warms
up.
1. Start-in-gear protection cable
3. Remove the starter/flywheel cover after
removing the bolt(s).
4. Prepare the engine for starting. For fur-
ther information, see page 29. Be sure
the engine is in neutral and that the en-
gine stop switch lanyard lock plate is at-
tached to the engine stop switch. The
main switch must be “ ” (on), if
equipped.
6. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope several turns
around the flywheel clockwise.
7. Give a strong pull straight out to crank
and start the engine. Repeat if neces-
sary.
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Trouble Recovery
1. Yellow cord
EMU29670Engine fails to operate
EMU29760
EIgMUn29i6t9i1on system malfunction
Treatment of submerged motor
If the outboard motor is submerged, immedi-
ately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immediate-
ly.
If the battery voltage is low or in the unlikely
event of an ignition system malfunction, the
engine speed may become erratic or the en-
gine may stop. In such a situation, follow the
procedure below.
1. Remove the CDI unit cover or electrical
cover, if equipped.
2. Disconnect the yellow cord (emergency
If you cannot immediately take the outboard
motor to a Yamaha dealer, follow the proce-
dure below in order to minimize engine dam-
age.
EPMrUo29c783edure
circuit) of the CDI unit to return to port.
EWM00350
1. Thoroughly wash away mud, salt, sea-
WARNING
weed, and so on, with fresh water.
When the yellow cord is disconnected, the
idle and low speeds are slightly higher
than normal. Use care when starting off or
stopping.
ECM00380
CAUTION:
Follow this procedure only in an emergen-
cy and just long enough to return to port
for repairs.
ZMU02075
2. Remove the spark plug(s), then face the
spark plug holes downward to allow any
water, mud, or contaminants to drain.
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Trouble Recovery
ZMU02076
3. Drain the fuel from the carburetor, fuel fil-
ter, and fuel line. Drain the engine oil
completely.
4. Fill the sump with the fresh engine oil.
Engine oil capacity:
0.8 L (0.85 US qt) (0.70 Imp.qt)
5. Feed engine fogging oil or engine oil
through the carburetor(s) and spark plug
holes while cranking the engine with the
manual starter or emergency starter
rope.
ZMU02077
6. Take the outboard motor to a Yamaha
dealer as soon as possible.
ECM00400
CAUTION:
Do not attempt to run the outboard motor
until it has been completely inspected.
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Consumer information
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Consumer information
77
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YAMAHA MOTOR CORPORATION, USA
Printed in France
January 2004–0.3 × 1 CR
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