Yamaha Outboard Motor 15A User Manual

9.9A

15A

OWNER’S MANUAL

U.S.A.Edition

LIT-18626-04-53

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EMU01448

TO THE OWNER

Thank you for choosing a Yamaha out-

board motor. This Owner’s manual con-

tains information needed for proper oper-

ation, maintenance and care. A thorough

understanding of these simple instruc-

tions 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.

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 advance-

ments 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

your machine and this manual. If there

is any question concerning this manual,

please consult your Yamaha dealer.

In this Owner’s Manual particularly

important information is distinguished in

the following ways.

The Safety Alert Symbol means

ATTENTION! BECOME ALERT!

YOUR SAFETY IS INVOLVED!

NOTE:

Failure to follow WARNING instructions The 15MH and its standard accessories

could result in severe injury or death to are used as a base for the explanations

the machine operator, a bystander, or a and illustrations in this manual. There-

person inspecting or repairing the out- fore, some items may not apply to every

board motor.

model.

EMU01446

9.9A/15A

OWNER'S MANUAL

1st Edition, March 2001

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, USA

is expressly prohibited.

Printed in Japan

P/N LIT-18626-04-53

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CONTENTS

GENERAL INFORMATION

BASIC COMPONENTS

OPERATION

MAINTENANCE

TROUBLE RECOVERY

INDEX

READ THIS OWNER’S MANUAL CAREFULLY

BEFORE OPERATING YOUR OUTBOARD MOTOR.

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EMB00010

Chapter 1

GENERAL

INFORMATION

IDENTIFICATION NUMBERS

RECORD ....................................................1-1

Outboard motor serial number...........1-1

EMISSION CONTROL INFORMATION...1-2

SAFETY INFORMATION..........................1-3

IMPORTANT LABELS ..............................1-5

Warning labels......................................1-5

BASIC BOATING RULES .........................1-6

FUELING INSTRUCTIONS.....................1-10

Gasoline(petrol)..................................1-11

Engine oil ............................................1-11

PROPELLER SELECTION.......................1-12

START-IN-GEAR PROTECTION ............1-13

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EMU00005

IDENTIFICATION NUMBERS

RECORD

EMU00007

OUTBOARD MOTOR SERIAL

NUMBER

YAMAHA MOTOR CO., LTD.

MADE IN JAPAN

PAYS D'ORIGINE JAPON

The outboard motor serial number is

stamped on the label attached to the port

side of the clamp-bracket.

Record your outboard motor serial num-

ber in the spaces provided to assist you in

ordering spare parts from your Yamaha

dealer or for reference in case your out-

board motor is stolen.

401012

1 Outboard motor serial number

1-1

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EMU01385

EMISSION CONTROL

INFORMATION

EMU01386

NORTH AMERICAN MODELS

This engine conforms to U.S. Environ-

mental Protection Agency (EPA) regula-

tions for marine SI engines. See the label

affixed to your engine for details.

108015*

Approval label of Emission control

certificate

This label is attached to the bottom cowl-

ing.

1 Emission control information label

EMISSION CONTROL INFORMATION

ENGINE FAMILY :

THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.

g/kw-hr

rpm IN NEUTRAL

FELs :

IDLE SPEED :

SPARK PLUG GAP (mm) :

SPARK PLUG :

Existing Technology ; N/A

Manufactured date label

This label is attached to the clamp bracket

or the swivel bracket.

2 Manufactured date label

Manufactured:

1-2

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EMU00917

8 This product emits exhaust gases which

contain carbon monoxide, a colorless,

odorless gas which may cause brain

damage or death when inhaled. Symp-

toms include nausea, dizziness, and

drowsiness. Keep cockpit and cabin

areas well ventilated. Avoid blocking

exhaust outlets.

8 Check throttle, shift, and steering for

proper operation before starting the

engine.

8 Attach the engine stop switch lanyard

to a secure place on your clothing, or

your arm or leg while operating. If you

accidentally leave the helm, the lanyard

will pull from the switch, stopping the

engine.

8 Know the marine laws and regulations

where you will be boating - and obey

them. Refer to the “RULES OF THE

ROAD” section for basic boating rules.

8 Stay informed about the weather.

Check weather forecasts before boating.

Avoid boating in hazardous weather.

8 Tell someone where you are going:

leave a Float Plan with a responsible

person. Be sure to cancel the Float Plan

when you return.

8 Use common sense and good judgment

when boating. Know your abilities, and

be sure you understand how your boat

handles 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.

SAFETY

INFORMATION

8 Before mounting or operating the out-

board motor, read this entire manual.

Reading it should give you an under-

standing of the motor and its operation.

8 Before operating the boat, read any

owner’s or operator’s manuals supplied

with it and all labels. Be sure you under-

stand each item before operating.

8 Do not overpower the boat with this

outboard 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 horse-

power capacity of the boat. If the rated

horsepower capacity of the boat is

unknown, consult the dealer or boat

manufacturer.

8 Do not modify the outboard. Modifica-

tions could make the motor unfit or

unsafe to use.

8 Never operate after drinking alcohol or

taking drugs. About 50% of all boating

fatalities involve intoxication.

8 Have an approved personal flotation

device (PFD) on board for every occu-

pant. It is a good idea to wear a PFD

whenever boating. At a minimum, chil-

dren and non-swimmers should always

wear PFDs, and everyone should wear

PFDs when there are potentially haz-

ardous boating conditions.

8 Gasoline is highly flammable, and its

vapors are flammable and explosive.

Handle and store gasoline carefully.

Make sure there are no gas fumes or

leaking fuel before starting the engine.

8 Always watch carefully for swimmers

during the engine operation.

8 Stay away from swimming areas.

8 When a swimmer is in the water near

you shift into neutral and shut off the

engine.

1-3

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8 Be informed about boating safety. Addi-

tional publications and information can

be obtained from many organizations,

including the following:

United States Coast Guard

Consumer Affairs Staff (G-BC)

Office of Boating, Public, and Consumer

Affairs

U.S. Coast Guard Headquarters

Washington, D.C. 20593-0001

Boating Safety Hotline: 1-800-368-5647

National Marine Manufacturers

Association (NMMA)

401 N. Michigan Ave.

Chicago, Il 60611

Marine Retailers Association of America

155 N. Michigan Ave.

Chicago, Il 60601

1-4

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EMB30010

IMPORTANT LABELS

WARNING LABELS

WARNING

●Be sure shift control is in neutral

before starting engine. (except 2HP)

●Do not touch or remove electrical parts

when starting or during operation.

202012*

●Keep hands,hair,and clothes away from flywheel

and other rotating parts while engine is running.

6A1-83625-41

WARNING

This engine is equipped with a neutral starting device.

The engine will not start unless the shift control is

in neutral position.

6E0-83627-41

1-5

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EMB40010

Stand-on Vessel

BASIC BOATING RULES

The vessel with the right-of-way has the

duty to continue its course and speed,

except to avoid an immediate collision.

When you maintain your direction and

speed, the other vessel will be able to

determine how best to avoid you.

(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 internationally, and are

also enforced by the United States Coast

Guard and local agencies. You should be

aware of these rules, and follow them

whenever you encounter another vessel

on the water.

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 always move

in such a way that the operator of the

other vessel can see what you are doing.

Several sets of rules prevail according to

geographic 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 Aux-

iliary or Department of Motor Vehicles for

a complete set of rules governing the

waters in which you will be using your

boat.

“The general prudential rule”

This rule is called Rule 2 in the Inter-

national Rules and says,

‘In obeying and construing these

rules due regard shall be had to all

dangers of navigation and collision,

and to any special circumstances,

which may render a departure from

the above rules necessary in order to

avoid immediate danger.’

STEERING 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 “bur-

dened” vessel. These rules determine

which vessel has the right-of-way, and

what each vessel should do.

In other words, follow the standard rules

except when a collision will occur unless

both vessels try to avoid each other. If

that is the case, both vessels become

“Give-Way” vessels.

1-6

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side. This rule doesn’t apply if both of you

will clear one another if you continue on

your set course and speed.

RULES WHEN ENCOUNTERING

VESSELS

There are three main situations which you

may encounter with other vessels which

could lead to a collision unless the Steer-

ing Rules are followed:

Meeting

(you are approaching another vessel

head-on)

Crossing

(you are travelling across the other

vessel’s path)

102044

Overtaking

Crossing

(you are passing or being passed by

another vessel)

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 ves-

sel is on your port (left) side, remember

that you should maintain course and

direction, provided the other vessel gives

you the right-of-way as it should.

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 ves-

sels 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.

102045

Meeting

102046

If you are meeting another power vessel

head on, and are close enough to run the

risk of collision, neither of you has the

right-of-way! Both of you should alter

course to avoid an accident. You should

keep the other vessel on your port (left)

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

1-7

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of its way until you are clear of it. Like- 1. When the sailing vessel is overtaking

wise, if another vessel is passing you, you

should maintain your speed and direction

the power-driven vessel, the power-

driven vessel has the right-of-way.

so that the other vessel can steer itself 2. Sailing vessels should keep clear of

around you.

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.

OTHER SPECIAL SITUATIONS

There are three other rules you should be

aware of when driving your boat around

other vessels.

Reading Buoys and Other Markers

Narrow Channels and Bends

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, numbers and lights to

show which side of the buoy a boater

should pass on when navigating in a par-

ticular direction. The markings on these

buoys are oriented from the perspective

of being entered from seaward (the

boater is going towards the port). This

means that red buoys are passed on the

starboard (right) side when 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 starboard.

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 vessels, the operator

should sound a prolonged 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 proceed

around the bend with caution. If you navi-

gate such waters with your boat, you will

need to carry a portable air horn, avail-

able from local marine supply stores.

Fishing Vessel Right-of-way

All vessels which are fishing with nets,

lines or trawls are considered to be“fish-

ing vessels” under the International

Rules. Vessels with trolling lines are not

considered fishing vessels. Fishing ves-

sels have the right-of-way regardless of

position. Fishing vessels cannot, howev-

er, impede the passage of other vessels in

narrow channels.

Many bodies of water used by boaters are

entirely within the boundaries of a partic-

ular state. The Uniform State Waterway

Marking System has been devised for

these waters. This system uses buoys and

signs with distinctive shapes and colors

to show regulatory or advisory informa-

tion. These markers are white with black

letters and orange boarders. They signify

speed zones, restricted areas, danger

areas, and general information.

Sailing Vessel Right-of-way

Sailing vessels should normally be given

the right-of-way. The exceptions to this

are:

1-8

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Remember, markings may vary by geo-

graphic location. Always consult local

boating authorities before driving your

boat in unfamiliar waters.

MAIN CHANNEL BUOYS

"1" " 3" " 5" " 7"

" 6"

LIGHTED BUOY (Port Hand)`

C "1"

N " 2"

" 7"

Odd number. increasing toward head of naviga-

tion.Leave to port (left) proceeding upstream.

RB " L"

White Light

Green Light

RG " L"

"5"

new

old

BUOY

COLOR CODE

"4"

BLACK

" 2" " 4" " 6"

LIGHTED BUOY (Starboard Hand)`

RED

Even number,increasing toward head of naviga-

tion. Leave to starboard (right) proceeding up-

stream.

" 3"

GREEN

White Light

Red Light

"A"

" 2"

new

old

"1"

"A"

LIGHTED SAFE WATER BUOY

Proceeding toward head

of navigation from seaward

No number. Marks midchannel, pass on either

side. Letter has no lateral significance, used for

identification and location purposes.

SECONDARY CHANNEL BUOYS

STARTS NEW NUMBERING SYSTEM

Top Mark

White Light

" 1"

CAN BUOY

Odd number. Leave to port.

new

old

new

RB " L"

RG " L"

LIGHTED PREFERRED CHANNEL TO

PORT BUOY

" 2"

NUN BUOY

Even number. Leave to starboard

No number. Topmost band red

preferred

channel is to left of buoy. Letter has no lateral

significance, used for identification and location

purposes.

Red or

White Light

Red Light

new

old

No change

102052

1-9

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EMU00016

FUELING INSTRUCTIONS

GASOLINE AND ITS VAPORS ARE HIGH-

LY FLAMMABLE AND EXPLOSIVE!

8 Do not smoke when refueling, and

keep away from sparks, flames, or

other sources of ignition.

8 Stop engine before refueling.

8 Refuel in a well-ventilated area. Refuel

portable fuel tanks off the boat.

8 Take care not to spill gasoline. If gaso-

line spills, wipe it up immediately with

dry rags.

8 Do not overfill the fuel tank.

8 Tighten the filler cap securely after

refueling.

8 If you should swallow some gasoline

inhale a lot of gasoline vapor, or get

gasoline in your eyes, get immediate

medical attention.

8 If any gasoline spills onto your skin,

immediately wash with soap and

water. Change clothing if gasoline spills

on it.

8 Touch the fuel nozzle to the filler open-

ing or funnel to help prevent electrosta-

tic sparks.

Use only new clean gasoline which has

been stored in clean containers and is not

contaminated with water or foreign mat-

ter.

1-10

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EMU00018

GASOLINE (PETROL)

Recommended gasoline:

Regular unleaded gasoline with a

minimum octane rating of 86

(Pump octane number) = (R+M)/2

If knocking or pinging occurs, use a differ-

ent brand of gasoline or premium unlead-

ed fuel. If unleaded gasoline is not avail-

able, then leaded regular gasoline can be

used.

EMU00027

Gasohol

There are two types of gasohol: gasohol

containing 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. Gasohol containing

methanol is not recommended by Yama-

ha because it can cause fuel system dam-

age or engine performance problems.

EMU00858

ENGINE OIL

Recommended oil:

YAMALUBE 2 STROKE OUTBOARD OIL

If the recommended engine oil is not

available, another 2-stroke engine oil with

a NMMA-certified TC-W3 rating may be

used.

1-11

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EMU01395

PROPELLER SELECTION

The performance of your outboard motor

will be critically affected by your choice of

propeller, as an incorrect choice could

adversely affect 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.

Yamaha outboard motors are fitted with

propellers 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 pro-

peller is more suitable for a smaller oper-

ating load.

Yamaha dealers stock a range of pro-

pellers, and can advise you and install a

propeller on your outboard that is best

suited to your application.

1-12

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NOTE:

At full throttle and under a maximum

boat load, the engine’s rpm should be

within the upper half of the full throttle

operating range, as listed in “SPECIFICA-

TIONS” on page 4-1. Select a propeller

which fulfills this requirement.

If operating under conditions which allow

the engine’s rpm to rise above the maxi-

mum recommended range (such as light

boat loads), reduce the throttle setting to

maintain the rpm in the proper operating

range.

9-1/4x9-3/4-J

1 Propeller diameter (in inches)

2 Propeller pitch (in inches)

2 3

3 Type of propeller (propeller mark)

Refer to the section “CHECKING PRO-

PELLER” for instructions on propeller

removal and installation.

602021

EMU01209

START-IN-GEAR PROTECTION

Yamaha outboard motors or Yamaha

approved remote control units are

equipped with start-in-gear protection

device(s). This feature permits the engine

to be started only when it is Neutral.

Always select Neutral before starting the

engine.

1-13

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EMC00010

Chapter 2

BASIC COMPONENTS

MAIN COMPONENTS..............................2-1

OPERATIONS OF CONTROLS AND

OTHER FUNCTIONS................................2-2

Fuel tank ................................................2-2

Gear shift lever .....................................2-2

Engine stop button...............................2-3

Engine stop lanyard switch.................2-3

Throttle control grip.............................2-4

Choke knob ...........................................2-4

Recoil starter handle ............................2-4

Tiller handle ..........................................2-5

Steering friction adjustment ...............2-6

Trim angle adjusting rod.....................2-6

Tilt lock mechanism .............................2-6

Tilt support bar .....................................2-7

Top cowling lock lever.........................2-7

Carrying handle....................................2-7

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EMU01206

MAIN COMPONENTS

101022*

902063

902051*

101232

1 Top cowling

q Carrying handle

2 Cowling lock lever

3 Cooling water pilot hole

4 Tilt lock lever

5 Recoil starter handle

6 Gear shift lever

7 Throttle control grip

8 Throttle friction adjustment knob

9 Engine stop button/

Engine stop lanyard switch

0 Clamp screw

w Cooling water inlet

e Anti-cavitation plate

r Trim angle adjusting rod

t Clamp bracket

y Rope attachment

u Choke knob

i Fuel tank

o Fuel hose

May not be exactly as shown; also may not

be included as standard equipment on all

models.

2-1

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EMC20010

OPERATIONS OF CONTROLS

AND OTHER FUNCTIONS

EMC21012

FUEL TANK

If your model was equipped with a

portable fuel tank, its function is as fol-

lows.

1 Fuel hose joint

2 Fuel meter(If equipped)

3 Fuel tank cap

4 Air vent screw(If equipped)

Fuel hose joint

This connector is provided for connecting

or disconnecting fuel hose.

902051

Fuel meter

This meter is on the fuel tank cap. It

shows current fuel quantity in the fuel

tank approximately.

Fuel tank cap

This cap is for filling fuel. To remove it,

turn it counterclockwise.

Air Vent screw

This screw is on the fuel tank cap. To

loosen it, turn it counterclockwise.

EMC25010

GEAR SHIFT LEVER

(for Tiller control model):

Turning the gear-shift lever towards you

engages the clutch with the forward gear

so that the boat moves ahead. Turning

the lever away from you engages the

reverse gear so that the boat moves

astern.

406041

1 Neutral

2 Forward

3 Reverse

2-2

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EMC27011

ENGINE STOP BUTTON (for Tiller

control model)

Pushing this button opens the ignition cir-

cuit and stops the engine.

EMU00931

407021*

ENGINE STOP LANYARD SWITCH

(for Tiller control model)

The lock-plate 1 must be attached to the

engine stop lanyard switch for the engine

to run. The lanyard 2 should be attached

to a secure place on the operator’s cloth-

ing, or arm or leg. Should the operator fall

overboard or leave the helm, the lanyard

will pull out the lock plate, stopping igni-

tion to the engine. This will prevent the

boat from running away under power.

407021

8 Attach the lanyard to a secure place on

your clothing, your arm or leg while

operating.

8 Do not attach the lanyard to clothing

that could tear loose. Do not route the

lanyard in such a way that it could

become entangled, preventing it from

functioning.

8 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.

NOTE:

The engine cannot be started with the

lock-plate removed.

2-3

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EMC40010

THROTTLE CONTROL GRIP

(for Tiller control model)

The throttle control grip is on the tiller

handle. Turn the grip counterclockwise to

increase speed and clockwise to decrease

speed.

Throttle indicator

The fuel consumption curve on the throt-

tle indicator shows the relative amount of

fuel consumed for each throttle position.

Choose the setting that offers the best

performance and fuel economy for the

desired operation.

1 Throttle indicator

503013

EMC42310

CHOKE KNOB

Pulling out this knob supplies a rich mix-

ture required to start or warm up the

engine. There are 4 operating position as

shown below :

Position

Function

To start a hot engine

305071

2 or 3

To warm up a cold engine

or restart a warm engine

To start a cold engine

EMC44010

RECOIL STARTER HANDLE

(If equipped)

Pull the handle gently until resistance is

felt. Then vigorously pull the handle

straight out to crank the engine to start it.

209011

2-4

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EMC60010

TILLER HANDLE

(for Tiller control model)

Moving the tiller handle sideways to

adjust the steering direction.

503015

EMC64010

Throttle Friction Adjustment

(for Tiller control model)

A friction device in the tiller handle pro-

vides resistance to movement of the

throttle grip. This is adjustable for opera-

tor preference. An adjusting screw/bolt is

located within the tiller handle.

502011

To increase the resistance:

Turn the adjusting screw/bolt clockwise.

To decrease the resistance:

Turn the adjusting screw/bolt counter-

clockwise.

When constant speed is desired, tighten

the adjusting screw/bolt to maintain the

desired throttle setting.

Do not overtighten the friction adjusting

screw/bolt. If there is too much resis-

tance, it may be difficult to move the

throttle grip, which could result in an

accident.

2-5

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EMD00010

STEERING FRICTION ADJUSTMENT

(for Tiller control model)

A friction device provides resistance to

steering movement. This is adjustable for

operator preference.

An adjusting screw/bolt is located on the

swivel bracket.

408011

To increase the resistance:

Turn the adjusting screw/bolt clockwise.

To decrease the resistance:

Turn the adjusting screw/bolt counter-

clockwise.

not

overtighten

the

friction

screw/bolt. If there is too much resis-

tance, it may be difficult to steer, which

could result in an accident.

EMU01297

TRIM ANGLE ADJUSTING ROD

The position of the trim angle adjusting

rod determines the minimum trim angle

of the outboard motor in relation to the

transom.

404013**

EMD44110

TILT LOCK MECHANISM

(for Manual tilt model)

The tilt-lock mechanism is used to pre-

vent reverse thrust from the propeller lift-

ing the outboard motor when reversing.

To lock it, set the tilt-lock lever in the Lock

position. To release it, place the tilt-lock

lever in the Tilt position.

402014*

1 Tilt-lock lever

2-6

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EMD48010

TILT SUPPORT BAR

The tilt support bar keeps the outboard

motor in the tilted up position.

403013

EMD62011

TOP COWLING LOCK LEVER

To remove the engine top cowling, turn

the lock lever. Then lift off the cowling.

When replacing the cowling, check to be

sure it fits properly in the rubber seal.

Then lock the cowling again by moving

the lever upward.

301012*

1 Top cowling lock lever

EMD68010*

CARRYING HANDLE

The carrying handle is included between

the clamp bracket. The carrying handle

enables you to carry the outboard motor

readily with one hand after setting it up.

To set up the carrying handle, proceed as

follows.

1) Place the tilt lock lever in the lock

position.

2) Securely hook the arm of carrying

handle end to the clamp bracket bar.

Place the tilt lock lever in the lock posi-

tion while using the carrying handle. Oth-

erwise, the lower casing may fall to the

grand while carrying the motor.

1 Clamp bracket bar

2-7

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EMF00010

Chapter 3

OPERATION

INSTALLATION ........................................3-1

Mounting the outboard motor............3-2

Clamping the outboard motor............3-4

FILLING FUEL AND ENGINE OIL............3-5

Filling fuel..............................................3-5

Gasoline (petrol) and oil mixing.........3-6

PRE-OPERATION CHECKS......................3-7

BREAKING IN (RUNNING IN)

ENGINE .....................................................3-8

STARTING ENGINE ...............................3-10

WARMING UP ENGINE.........................3-13

SHIFTING ................................................3-14

Forward ...............................................3-14

Reverse................................................3-15

STOPPING ENGINE ...............................3-16

TRIMMING OUTBOARD MOTOR.........3-17

Adjusting trim angle ..........................3-18

CRUISING IN SHALLOW WATER.........3-20

TILTING UP/DOWN ...............................3-22

CRUISING IN OTHER CONDITIONS.....3-24

_{Cruising in salt water .........................3-24}6

Cruising in turbid water.....................3-24

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EMF10010

INSTALLATION

Incorrect engine height or obstructions to

smooth water flow (such as the design or

condition of the boat or accessories such

as transom ladders/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.

NOTE:

During water testing check the buoyancy

of the boat, at rest, with its maximum

load. Check that the static water level on

the exhaust housing is low enough to pre-

vent water entry into the powerhead,

when water rises due to waves when the

outboard is not running.

3-1

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EMU00176

MOUNTING THE OUTBOARD

MOTOR

Improper mounting of the outboard

motor could result in hazardous condi-

tions such as poor handling, loss of con-

trol, or fire hazards. Observe the follow-

ing:

8 The information presented in this sec-

tion is intended as reference only. It is

not possible to provide complete

instructions

boat/motor

for

every

possible

Proper

combination.

mounting depends in part on experi-

ence and the specific boat/motor com-

bination.

8 Your dealer or other person experi-

enced in proper rigging should mount

the motor. If you are mounting the

motor yourself, you should be trained

by an experienced person. [permanent

mounted type]

8 Your dealer or other person experi-

enced in proper outboard motor

mounting should show you how to

mount your motor. [portable type]

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.

1 Center line (keel line)

104011

3-2

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Overpowering a boat may cause severe

instability. Do not install an outboard

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 manufac-

turer.

EMU01298

Mounting Height

To run your boat at optimum efficiency,

the water-resistance (drag) of the boat

and outboard motor must be made as lit-

tle as possible. The mounting-height of

the outboard motor greatly affects the

water-resistance. If the mounting-height

is too high, cavitation tends to occur, thus

reducing the propulsion; and if the pro-

peller tips cut the air, the engine speed

will rise abnormally and cause the engine

to overheat. If the mounting-height is too

low, the water-resistance will increase

and thereby reduce engine efficiency.

Mount the engine so that the anti-cavita-

tion plate is between the bottom of the

boat and a level 25 mm (1 in.) below it.

NOTE:

0~25mm

104013

8 The optimum mounting height of the

outboard motor is affected by the

boat/motor combination and the

desired use. Test runs at different

heights can help determine the opti-

mum mounting height.

8 Refer to the section “TRIMMING OUT-

BOARD MOTOR” for instructions on

setting the trim angle of the outboard.

3-3

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EMF14010

CLAMPING THE OUTBOARD

MOTOR

1) Place the outboard on the transom so

that it is positioned as close to the

center as possible. Tighten the tran-

som clamp screws evenly and secure-

ly. Check the clamp-screws for tight-

ness occasionally during operation of

the motor as they can work loose due

to engine vibration.

409011

Loose clamp screws could allow the

motor to move on the transom or fall off

the transom. This could cause loss of

control and serious injury. Make sure the

transom screws are tightened securely.

Occasionally check the screws for tight-

ness during operation.

2) An engine restraint cable or chain

should be used. Attach one end to

the engine restraint cable attachment

point and the other to a secure

mounting point on the boat. Other-

wise, the engine could be completely

lost if it accidentally falls off the tran-

som.

410012

3-4

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FILLING FUEL

AND ENGINE OIL

EMF30010

FILLING FUEL

1) Remove the fuel tank cap.

2) Fill the fuel tank carefully.

3) Close the cap securely after refueling.

Wipe up any spilled fuel.

902055

Fuel tank capacity:

Refer to SPECIFICATIONS, Page 4-1.

Ring Free Fuel Additive

Gasoline is a precise blend of many differ-

ent substances, each chosen to give cer-

tain characteristics. Gasoline blends have

been changing in recent years in

response to concerns about pollution and

resulting emissions regulations. One of

the most obvious changes has been the

elimination of lead from most fuels.

As gasoline has changed, the amount of

additives such as aromatics and oxy-

genates has increased. These additives

are important for the engines in passen-

ger cars, but they can have detrimental

effects in marine engines, because of

increased deposits in the combustion

chamber. When enough deposits collect,

piston rings begin sticking. Performance

drops and engine wear increases dramati-

cally.

While many additives available may

reduce deposits, Yamaha recommends

the use of Ring Free Fuel Additive, avail-

able from your Yamaha dealer. Ring Free

has repeatedly proven its ability to clean

combustion deposits from inside the

engine, notably the critical piston-ring-

land area, and fuel system components.

Follow product labeling for use instruc-

tions.

3-5

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EMF35010

GASOLINE (PETROL) AND OIL

MIXING

Pre-mix model

Oil : Gasoline (Petrol)

1 : 25

1 : 100

Break-in period

After break-in

1) Pour oil and gasoline into the fuel

tank, in that order.

1 Oil

2 Gasoline (Petrol)

2) Then mix the fuel thoroughly by shak-

ing.

3) Make sure the oil is mixed with gaso-

line .

902032

8 Avoid using any oil other than the des-

ignated type.

8 Use a thoroughly blended fuel-oil mix-

ture.

8 If the mixture is not thoroughly blend-

ed, or if the mixing ratio is incorrect,

the following problems could occur:

Low oil ratio:

Lack of oil could cause major engine

trouble, such as piston seizure.

High oil ratio:

Too much oil could cause fouled

spark plugs, smoky exgaust, and

heavy carbon deposits.

Mixing ratio

25 : 1

1 L

12 L

14 L

24 L

(0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal,

0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)

Gasoline (Petrol)

Engine oil

0.04 L

0.48 L

0.56 L

0.96 L

(0.04 US qt, (0.51 US qt, (0.59 US qt, (1.01 US qt,

0.04 Imp qt) 0.42 Imp qt) 0.49 Imp qt) 0.84 Imp qt)

3-6

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Mixing ratio

100 : 1

1 L

12 L

14 L

24 L

(0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal,

0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)

Gasoline (Petrol)

Engine oil

0.01 L

0.12 L

0.14 L

0.24 L

(0.01 US qt, (0.13 US qt, (0.15 US qt, (0.25 US qt,

0.01 Imp qt) 0.11 Imp qt) 0.12 Imp qt) 0.21 Imp qt)

NOTE:

If using a permanently installed tank, pour

the oil gradually as the fuel is being

added to the tank.

EMF40012

PRE-OPERATION CHECKS

If any item in the pre-operation check is

not working properly, have it inspected

and repaired before operating the out-

board motor. Otherwise, an accident

could occur.

EMF41110

Fuel

8 Check to be sure you have plenty of fuel

for your trip.

8 Make sure there are no fuel leaks or

gasoline fumes.

8 Check fuel line connections to be sure

they are tight.

8 Be sure the fuel tank is positioned on a

secure, flat surface, and that the fuel

hose is not twisted or flattened, or likely

to contact sharp objects.

EMF42110

Oil

8 Check to be sure you have plenty of oil

for your trip.

3-7

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EMF43010

Controls

8 Check throttle, shift, and steering for

proper operation before starting the

engine.

8 The controls should work smoothly,

without binding or unusual free play.

8 Look for loose or damaged connec-

tions.

8 Check operation of the starter and stop

switches when the outboard motor is in

the water.

EMF43510

Engine

8 Check the engine and engine mounting.

8 Look for loose or damaged fasteners.

8 Check the propeller for damage.

Do not start the engine out of water.

Overheating and serious engine damage

can occur.

EMF50012

BREAKING IN (RUNNING IN)

ENGINE

Your new engine requires a period of

break-in (running-in) to allow mating sur-

faces of moving parts to wear-in evenly.

Correct break-in (running-in) will help

ensure proper performance and longer

engine life.

Failure to follow the break-in (running-in)

procedure may result in reduced engine

life or even severe engine damage.

3-8

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Break-in (running-in) time:10 hours

Break-in (running-in) premix ratio:

Refer to “Gasoline/Petrol and Oil

Mixing”.

EMU00226

Run the engine under load (in gear with a

propeller installed) as follows.

1) First 10 minutes:

Run the engine at the lowest possi-

ble-speed. A fast idle in neutral is

best.

2) Next 50 minutes:

Do not exceed half throttle (approxi-

mately 3,000 r/min). Vary engine

speed occasionally. If you have an

easy-planing boat, accelerate at full

throttle onto plane, then immediately

reduce the throttle to 3,000 r/min or

less.

3) Second hour:

Accelerate at full throttle onto plane,

then reduce engine speed to three-

quarter throttle (approximately 4,000

r/min). Vary engine speed occasional-

ly. Run at full throttle for one minute,

then allow about 10 minutes of opera-

tion at three-quarter throttle or less to

let the engine cool.

4) Third through tenth hours:

Avoid operating at full throttle for

more than 5 minutes at a time. Let the

engine cool between full-throttle runs.

Vary engine speed occasionally.

5) After the first 10 hours:

Operate the engine normally. Use the

standard premix ratio of gasoline :

Oil. (Refer to “Gasoline/Petrol and Oil

Mixing”.)

3-9

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EMU01147

STARTING ENGINE

8 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.

8 When the air vent screw is loosened,

gasoline (petrol) vapor will be released.

Gasoline (petrol) 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.

8 This product emits exhaust gases

which contain carbon monoxide, a col-

orless, odorless gas which may cause

brain damage or death when inhaled.

Symptoms include nausea, dizziness,

and drowsiness. Keep cockpit and

cabin areas well ventilated. Avoid

blocking exhaust outlets.

902053

304013*

902061

902025

1) If there is an air vent screw on the fuel

tank cap, loosen it 2 or 3 turns.

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.

NOTE:

During engine operation place the tank

horizontally, or fuel cannot be drawn into

the engine.

3) Squeeze the primer bulb with the out-

let end up until you feel it become

firm.

3-10

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EMU00854

PROCEDURE FOR TILLER CONTROL

MODEL

4) Place the gear-shift lever in the neu-

tral position.

NOTE:

The start-in-gear protection device pre-

vents the engine from starting except

when in Neutral.

406042

5) Place the throttle control grip in the

“START” position.

503016

6) 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

in the engine stop switch.

8 Attach the engine stop switch lanyard

to a secure place on your clothing, your

arm or leg while operating.

001105

8 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.

8 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.

3-11

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EMU00241*

Manual Start Model

7) Pull out the choke knob completely

when the engine is cold. After the

engine starts, set the choke knob to

the 2nd or 3rd position for warming

up the cold engine. After warming up

the engine, set the choke knob to the

original position.

305072

NOTE:

8 It is not necessary to use the choke

when restarting a hot engine.

8 If the choke knob is left pulled out, the

engine will stall.

8) Pull the starter handle slowly until

you feel resistance. Then, give a

strong pull straight out to start the

engine. Repeat it, if necessary.

9) After the engine starts, return the

starter handle slowly to the original

position before releasing it.

209011

3-12

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EMG00010-*

WARMING UP ENGINE

1) Before beginning operation, allow the

engine to warm up at idling speed for

3 minutes. (Failure to do this will

shorten engine life.)

2) Check for a steady flow of water from

the cooling-water pilot hole.

309012

A continuous flow of water from the pilot

hole shows that the water pump is

pumping water through the cooling pas-

sages. If water is not flowing out of the

pilot hole at all times while the engine is

running, do not continue to run the

engine. Overheating and serious damage

could occur. Stop the engine and check

to see if the water inlet on the lower cas-

ing is blocked. If the problem cannot be

found and corrected, consult your Yama-

ha dealer.

3-13

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EMG20111

SHIFTING

Before shifting, make sure there are no

swimmers or obstacles in the water near

you.

To change the shifting position from for-

ward to reverse or vice-versa, close the

throttle first so that the engine idles (or

runs at low speeds).

EMG22110

FORWARD

1) Place the throttle control grip in the

fully closed position.

503012

2) Turn the gear shift lever quickly and

firmly from Neutral to Forward.

406035

3-14

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EMG33210

REVERSE

When operating in Reverse, go slowly. Do

not open the throttle more than half. Oth-

erwise, the boat may become unstable,

which could result in loss of control and

an accident.

503012

402014

406036

1) Place the throttle control grip in the

fully closed position (for Tiller control

model).

2) Check that the tilt-lock lever (for Man-

ual tilt model) is in the locked posi-

tion.

3) Turn the gear-shift lever quickly and

firmly from Neutral to Reverse.

3-15

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EMG38010

STOPPING ENGINE

Let it cool off for a few minutes at idle or

low speed first. Stopping the engine

immediately after operating at high speed

is not recommended.

EMU00275

1) Push and hold the engine stop button

until the engine comes to a complete

stop.

407021*

2) After stopping the engine, disconnect

the fuel line from the motor.

304013

3) Tighten the air vent screw on the fuel

tank cap after stopping the engine, if

it is equipped.

NOTE:

The engine can also be stopped by

pulling the lanyard and removing the lock

plate from the engine stop lanyard switch.

902052

3-16

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EMU01412

TRIMMING OUTBOARD

MOTOR

The trim angle of the outboard motor

helps determine the position of the bow

of the boat in the water. The correct trim

angle will help improve performance and

fuel economy while reducing strain on the

engine. The correct trim angle depends

upon the combination of boat, engine,

and propeller. Correct trim is also affected

by variables such as the load in the boat,

sea conditions, and running speed.

Excessive trim for the operating condi-

tions (either trim up or trim down) can

cause boat instability and can make

steering 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.

105024*

NOTE:

Refer to the section “ADJUSTING TRIM

ANGLE” for instructions on usage.

1 Trim operating angle

3-17

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ADJUSTING TRIM ANGLE

EMU00951

Manual tilt model

There are 4 or 5 holes provided in the

clamp bracket to adjust the outboard

motor trim angle.

1) Stop the engine.

2) Remove the trim angle adjusting rod

1 from the clamp bracket while tilting

the motor up slightly.

404013*

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 toward the transom.

Make test runs with the trim set to differ-

ent angles to find the position that works

best for your boat and operating condi-

tions.

8 Stop the engine before adjusting the

trim angle.

8 Use care to avoid being pinched when

removing or installing the rod.

8 Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instabili-

ty or control problems. Improper trim

angle can cause loss of control.

NOTE:

The outboard motor trim angle can be

changed approximately 4 degrees by

shifting the trim adjusting-rod one hole.

3-18

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EMG62010

Bow up

When the boat is on plane, a bow-up atti-

tude result in less drag, greater stability

and efficiency. This is generally when the

keel line of the boat is up about 3 to 5

degrees. When trimmed out, the boat

may have more tendency to steer to one

side or the other. Compensate for this as

you steer. The trim tab can also be adjust-

ed to help offset this effect.

Too much trim-out puts the bow of the

boat too high in the water. Performance

and economy are decreased because the

hull of the boat is pushing the water and

there is more air drag.

Excessive trim-up can cause the propeller

to ventilate, which reduces performance

further. When trimmed-out too much, a

boat may “porpoise” (hop in the water),

which could throw the operator and pas-

sengers overboard.

105011

105013

105015

EMG62110

Bow down

When the bow of the boat is down, it is

easier to accelerate from a standing start

onto plane.

Too much trim-in causes the boat to

“plow” through the water, decreasing

fuel economy and making in hard to

increase speed.

Operating 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 operation dif-

ficult and dangerous.

1 Bow up

2 Bow down

3 Optimum angle

3-19

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EMG70011

CRUISING IN SHALLOW

WATER

The outboard motor can be tilted up par-

tially to allow operation in shallow water.

8 Place the gear shift in the Neutral posi-

tion before using the shallow water

cruising system.

000832

8 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.

Hitting an underwater obstacle could

cause the engine to lift out of the

water, resulting in loss of control.

8 Use extra care when operating in

reverse. Too much reverse thrust can

cause the engine to lift out of the

water, increasing the chance of acci-

dent and personal injury.

8 Return the engine to its normal posi-

tion as soon as the boat is back in

deeper water.

Place the gear-shift in the Neutral posi-

tion before using the shallow water cruis-

ing system.

3-20

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EMG71210

PROCEDURE

1) Place the gear shift lever in the neu-

tral position.

406042

402015

403056

403012

2) Pull up the tilt lock lever.

3) Slightly tilt up the engine. The tilt-

support bar will lock automatically,

supporting the engine in a partially

raised position.

NOTE:

If the engine is tilted up completely, the

tilt-lock lever automatically locks. The

shallow water lever is no longer effective.

4) When lowering the engine, push the

tilt lock lever down. Slightly tilt up the

engine until the tilt-support bar auto-

matically returns to the free position.

Then, slowly lower the engine to the

normal position.

3-21

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EMH10110

TILTING UP/DOWN

If the engine will be stopped for some

time, or if the boat is moored in shallows,

the engine should be tilted up to protect

the propeller and casing from damage by

collision with obstructions, and also to

reduce salt corrosion.

105031

8 Before tilting the motor, follow the pro-

cedures under “STOPPING ENGINE”.

Never tilt the motor while the engine is

running. Severe damage from over-

heating can result.

8 Do not tilt up the engine by pushing

the steering handle as this could break

the handle.

8 Keep the power unit higher than the

propeller at all times. Otherwise, water

can run into the cylinder, causing dam-

age.

Be sure all people are clear of the out-

board motor when adjusting the tilt

angle, also be careful not to pinch any

body parts between the drive unit and

engine bracket.

Leaking fuel is a fire hazard. Disconnect

the fuel line if the engine will be tilted for

more than a few minutes. Otherwise, fuel

may leak. (If the fuel connector is provid-

ed on the motor.)

3-22

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EMU00290

PROCEDURE FOR TILTING UP

1) Place the gear shift lever in Neutral.

2) Remove the fuel line connection from

the motor.

304013

3) Place the tilt lock lever in the release

position.

402015

4) Hold the rear of the top cowling with

one hand and fully tilt the engine up.

5) The tilt support bar turns to the

locked position automatically.

403013

EMU00300

PROCEDURE FOR TILTING DOWN

1) Place the tilt lock lever in the lock

position.

2) Slightly tilt up the engine until the tilt

support bar is released automatically.

3) Tilt down the engine.

403012

3-23

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EMH60010

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-

up with salt deposits.

NOTE:

Refer to cooling system flushing instruc-

tions in “TRANSPORTING AND STORING

OUTBOARD MOTOR”.

CRUISING IN TURBID WATER

It is strongly recommended that the

optional chromium-plated water-pump kit

be installed if the outboard is to be used

in turbid (muddy) water conditions.

3-24

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-MEMO-

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EMK00010

Chapter 4

MAINTENANCE

SPECIFICATION DATA.............................4-1

TRANSPORTING AND STORING

OUTBOARD MOTOR ...............................4-3

Trailering outboard motor...................4-3

Storing outboard motor ......................4-4

PERIODIC MAINTENANCE......................4-7

Replacement parts ...............................4-7

Maintenance chart................................4-8

Cleaning and adjusting spark plug.....4-9

Checking fuel system.........................4-11

Inspecting fuel filter ...........................4-12

Adjusting idling speed.......................4-13

Checking wiring and connectors ......4-14

Exhaust leakage..................................4-14

Water leakage.....................................4-14

Greasing..............................................4-15

Checking propeller .............................4-16

Changing gear oil...............................4-18

Cleaning fuel tank...............................4-19

Inspecting and replacing anode .......4-20

Checking bolts and nuts ....................4-21

Motor exterior.....................................4-21

Coating the boat bottom ...................4-21

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EMR50302*

SPECIFICATION DATA

Model

Unit

9.9MHA

Item

DIMENSIONS

8Overall Length

8Overall Height

8Overall Width

8Transom height

8Weight

mm (in.)

kg (lb.)

873 (34.4)

1,040 (40.9)

332 (13.1)

440 (17.3)

36.6 (79.4)

PERFORMANCE

8Full throttle operating range

8Maximum output

8Idling speed (in neutral)

r/min

kW (HP)

r/min

4,500~5,500

7.3 (9.9) at 5,000 r/min.

700~800

ENGINE

8Engine type

Displacement

2-stroke, L2

246 (15.01)

cm (cu.in.)

Bore × stroke

mm (in.)

56 × 50 (2.20 × 1.97)

8Ignition system

C.D.I

8Spark plug

NGK

B7HS-10

Spark plug gap

mm (in.)

0.9~1.0 (0.035~0.039)

8Control system

Tiller control

8Starting system

8Battery capacity

Minimum cold crank peformance

Minimum reserve capacity

8Alternator output

8Starting carburetion system

Manual start

—

12-(80)

Choke valve start system

V-AH (kc)

Amps at -17.8°C (0°F)

minutes at 26.7°C (80°F)

V-A (W)

DRIVE UNIT

8Gear positions

Gear ratio

8Trim/tilt system

8Propeller mark

Forward-Neutral-Reverse

2.08 (27/13)

Manual

FUEL AND OIL

8Fuel

Regular unleaded gasoline

(P.O.N.: minimum 86)

25 (6.6, 5.5)

YAMALUBE, 2 STROKE OUTBOARD OIL or

an equivalent TC-W3 certified outboard oil

100 : 1

Fuel tank capacity

8Recommended engine oil

L (US gal, Imp gal)

cm³(US oz, Imp oz)

Fuel/oil ratio

8Recommended gear oil

Gear oil quantity

Hypoid gear oil (SAE 90)

250 (8.5, 8.8)

TIGHTENING TORQUE

25 (2.5, 18)

17 (1.7, 12)

8Spark plug

8Propeller nut

N•m (kgf•m, lb•ft)

4-1

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15MHA

—

873 (34.4)

1,040 (40.9)

332 (13.1)

440 (17.3)

36.6 (79.4)

4,500~5,500

11.0 (15) at 5,000 r/min.

700~800

2-stroke, L2

246 (15.01)

56 × 50 (2.20 × 1.97)

C.D.I

B7HS-10

0.9~1.0 (0.035~0.039)

Tiller control

Manual start

—

12-(80)

Choke valve start system

Forward-Neutral-Reverse

2.08 (27/13)

Manual

Regular unleaded gasoline

(P.O.N.: minimum 86)

25 (6.6, 5.5)

YAMALUBE, 2 STROKE OUTBOARD OIL or

an equivalent TC-W3 certified outboard oil

100 : 1

Hypoid gear oil (SAE 90)

250 (8.5, 8.8)

25 (2.5, 18)

17 (1.7, 12)

4-2

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EMU01369

TRANSPORTING AND

STORING OUTBOARD MOTOR

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.

TRAILERING OUTBOARD MOTOR

The motor should be trailered and stored

in the normal running position. If there is

insufficient road clearance in this position,

then trailer the motor in the tilt position

using a motor support device such as a

transom saver bar.

Do not use the tilt support lever/knob

when trailering the boat. The outboard

motor could shake loose from the tilt

support and fall. If the motor can not be

trailered in the down position, use an

additional support device to secure it in

the up position.

8 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 accidentally falls.

8 USE CARE when transporting fuel tank,

whether in a boat or car.

DO NOT fill fuel container to maximum

capacity.

Gasoline will expand considerably as it

warms up and can build up pressure in

the fuel container. This can cause fuel

leakage and a potential fire hazard.

4-3

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When transporting or storing the out-

board motor while removed from a boat,

fold the tiller handle and lean the motor

on the tiller handle to keep in a horizontal

position.

1 Vertical position

2 Horizontal position

NOTE:

Place a towel or the like under the out-

board motor to protect it from damage.

Keep the power unit higher than the pro-

peller at all times.

Otherwise, cooling water can run into the

cylinder, which could result in damage.

EMK22010**

STORING OUTBOARD MOTOR

When storing your Yamaha outboard for

prolonged periods of time, (2 months or

longer), several important procedures

must be performed to prevent expensive

damage.

102015

It is advisable to have your outboard ser-

viced by an authorized Yamaha dealer

prior to storage. However, the following

procedures can be performed by you, the

owner, with a minimum of tools.

102013

Filling Fuel Tank

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.

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 sys-

tem is to be drained instead.

4-4

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EMU00338*

Flushing Cooling System and Fogging

Engine

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 expensive engine damage due to

rust. Perform the flushing and fogging at

the same time.

8 Do not tough or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts

while engine is running.

EMU00994*

8 Flushing in a Water Tank

If the fresh water level is below the level

of the anti-cavitation plate, or if the water

supply is insufficient, engine seizure may

occur.

1) Remove the engine top cowling.

2) Install the outboard motor on the

water tank.

3) Fill the tank with fresh water to above

the level of the anti-cavitation plate.

4) Remove the cap a for fogging on the

silencer cover.

5) Run the engine at a fast idle for 10~15

minutes.

6) Just prior to turning off the engine,

quickly spray “Yamaha Stor-Rite

Engine Fogging Oil” (Part No. LUB-

STRRT-12-00) into the silencer cover.

When properly done, the engine will

smoke excessively and almost stall.

7) Remove the motor from the water

tank.

605024

8) Install the cap and the top cowling.

1 Water surface

2 Lowest water level

4-5

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EMK26010

Lubrication

1) Remove the spark plugs, and spray a

10 second spray of Yamaha Stor-Rite

Engine Fogging Oil into each cylinder.

Grease the spark plug threads and

reinstall the spark plugs and torque to

proper specification.

(Refer to the Periodic Maintenance

section, “Cleanning and adjusting

spark plug.”).

2) Turn the engine over with the stop

lanyard disconnected to work the fog-

ging oil into the piston rings.

3) Change the lower unit oil. (Refer to

the Periodic Maintenance section,

“Changing gear oil.”). Inspect the oil

for the presence of water which indi-

cates a leaky seal. Seal replacement

should be performed by an autho-

rized Yamaha dealership prior to use.

4) Grease all grease fittings. (Refer to

the Periodic Maintenance section,

“Greasing.”)

EMK27010

Cleaning and Anti-corrosion Measure

1) Wash down the exterior of the out-

board with fresh water and dry off

completely.

2) Spray the engine’s exterior with

Yamaha Silicone Protectant (Part No.

LUB-SILCNE-13-00).

3) Wax the cowling with a non-abrasive

wax such as Yamaha Silicone Wax

(Part No. ACC-11000-15-02).

4-6

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EMK32110

PERIODIC MAINTENANCE

Be sure to turn off the engine when you

perform maintenance unless otherwise

specified. If the owner is not familiar with

machine servicing, this work should be

done by a Yamaha dealer or other quali-

fied mechanic.

A service manual is available for purchase

through a Yamaha dealer for owners who

have the mechanical skills, tools, and

other equipment necessary to perform

maintenance not covered by this owner’s

manual.

EMK33011

REPLACEMENT PARTS

If replacement parts are necessary, use

only genuine Yamaha parts or equiva-

lents of the same type and of equivalent

strength and materials. Any part of inferi-

or quality may malfunction, and the

resulting loss of control could endanger

the operator and passengers.

Yamaha genuine parts and accessories

are available from a Yamaha dealer.

4-7

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MAINTENANCE CHART

Frequency of maintenance operations may be adjusted according to the operating con-

ditions, but the following table gives general guidelines.

The mark (●) indicates the check-ups which you may carry out yourself.

The mark (1) indicates work to be carried out by your Yamaha dealer.

Interval

Initial

Every

Refer

Page

50 hours 100 hours 200 hours

(3 months) (6 months) (1 year)

10 hours

Item

Cleaning/Adjustment/

Replacement

Spark plug

4-9

Greasing points

Gear oil

Fuel system

Fuel filter

Fuel tank *1

Idling speed

Anode

Outboard motor

exterior

Cooling water passages Cleaning

Greasing

Change

Inspection

Cleaning/Inspection

Cleaning

4-15

4-18

4-11

4-12

4-19

4-13

4-20

Adjustment

Inspection/Replacement

Inspection

4-21

4-5

4-16

4-17

Propeller and cotter pin Inspection/Replacement

Carburetor setting

Ignition timing

Bolts and nuts

Inspection/Adjustment

Retightening

—

4-21

*1. If a portable fuel tank is equipped.

NOTE:

Cooling water passages;

When operating in salt water, turbid or muddy water, the engine should be flushed

with clean water after each use.

4-8

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EMU01202

CLEANING AND ADJUSTING SPARK

PLUG

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

component 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 elec-

trode porcelain is very white, this could

indicate an intake air leak or carburetion

problem in that cylinder. Do not attempt

to diagnose 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

excessive, or if carbon and other deposits

are excessive, you should replace the

spark plug with another of the correct

type.

Standard spark plug:

Refer to “SPECIFICATIONS”, page 4-1.

Before fitting the spark plug, measure the

electrode gap with

wire thickness

gauge; adjust the gap to specification if

necessary.

Spark plug gap:

Refer to “SPECIFICATIONS”, page 4-1.

4-9

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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:

Refer to “SPECIFICATIONS”, page 4-1.

NOTE:

If a torque-wrench is not available when

you are fitting a spark plug, a good esti-

mate of the correct torque is 1/4 to 1/2 a

turn past finger-tight. Have the spark plug

adjusted to the correct torque as soon as

possible with a torque-wrench.

Initial of spark plug Plug wrench size

I.D. mark

903022

21 mm (13/16 in.)

16 mm (5/8 in.)

C/BK

18.3 mm (23/32 in.)

1 Spark plug gap

2 Spark plug I.D. mark (NGK)

4-10

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EMK38010

CHECKING FUEL SYSTEM

Gasoline (petrol) and its vapors are highly

flammable and explosive. Keep away

from sparks, cigarettes, flames or other

sources of ignition.

Check the fuel line for leaks, cracks, or

malfunctions. If any problem is found, it

should be repaired immediately by Yama-

ha dealer or other qualified mechanic.

Checking points

Fuel system parts leakage.

Fuel hose joint leakage.

Fuel hose cracks or other damage.

Fuel connector leakage.

Leaking fuel can result in fire or explo-

sion.

8 Check for fuel leakage regularly.

8 If any fuel leakage is found, the fuel

system must be repaired by a qualified

mechanic.

Improper repairs can make the out-

board unsafe to operate.

4-11

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EMU00370

INSPECTING FUEL FILTER

Gasoline (petrol) is highly flammable, and

its vapors are flammable and explosive.

8 If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

8 Do not perform this procedure on a hot

or running engine. Allow the engine to

cool.

8 There will be fuel in the fuel filter. Keep

away from sparks, cigarettes, flames or

other sources of ignition.

8 This procedure will allow some fuel to

spill. Catch fuel in a rag. Wipe up any

spilled fuel immediately.

8 The fuel filter must be reassembled

carefully with O-ring, filter cup, and

hoses in place. Improper assembly or

replacement can result in a fuel leak,

which could result in a fire or explosion

hazard.

EMU00978*

1) Remove the nut holding the fuel filter

assembly if equipped.

2) Unscrew the filter cup 1, catching

any spilled fuel in a rag.

3) Remove the filter element 2, and

wash it in solvent.

207012

Allow it to dry. Inspect the filter ele-

ment and O-ring 3 to make sure they

are in good condition. Replace them if

necessary.

4) Reinstall the filter element in the cup.

Make sure the O-ring in position in

the cup. Firmly screw the cup onto

the filter housing 4.

5) Attach the filter assembly to the

bracket with that the fuel hoses are

attached to the filter assembly.

6) Run the engine and check the filter

207013*

and lines for leaks.

4-12

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EMU00991

ADJUSTING IDLING SPEED

8 Do not touch or remove electrical parts

when starting or during operation.

8 Keep hands, hair and clothes away

from flywheel and other rotating parts

while engine is running.

This procedure must be performed while

the outboard motor is in the water. A

flushing attachment or test tank can be

used.

A diagnostic tachometer should be used

for this procedure.

1) Start the engine and allow it to warm

up fully in Neutral until it is running

smoothly. If the outboard is mounted

on a boat, be sure the boat is tightly

moored.

2) Adjust the throttle stop-screw 1 to

set the idling speed to specification

(see “SPECIFICATIONS” on page 4-1)

by turning the stop-screw clockwise

to increase the idling speed, and turn-

ing it counterclockwise to decrease

the idling speed.

204021*

NOTE:

Correct idling-speed adjustment is only

possible if the engine is fully warmed-up.

If not warmed up fully, the speed setting

will tend to be too high. If you have diffi-

culty obtaining the specified idle, consult

Yamaha dealer or other qualified

mechanic.

4-13

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EMK78010

CHECKING WIRING AND

CONNECTORS

1) Check that each grounding wire is

properly secured.

2) Check that each connector is engaged

securely.

606011

EXHAUST LEAKAGE

Start the engine and check that no

exhaust leaks from the joints between the

exhaust cover, cylinder head and crank

case.

WATER LEAKAGE

Start the engine and check that no water

leaks from the joints between the exhaust

cover, cylinder head and crank case.

4-14

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EMU00366

GREASING

Yamaha marine grease

(Water resistant grease)

103011

4-15

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EML08110-*

CHECKING PROPELLER

You could be seriously injured if the

engine accidentally starts while you are

near the propeller.

8 Before

inspecting,

removing

installing the propeller, remove the

spark plug caps from the spark plugs.

Also, put the shift control in Neutral,

put the main switch in the OFF position

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.

210012

8 Do not use your hand to hold the pro-

peller when loosening or tightening the

propeller nut. Put

wood block

between the cavitation plate and the

propeller to prevent the propeller from

turning.

602051

1) Check each of the propeller blades for

wear, erosion from cavitation or ven-

tilation, or other damage.

2) Check the splines for wear and dam-

age.

3) Check for fish line winding around the

propeller shaft.

602054

Check the propeller shaft oil seal for

damage.

4-16

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[How to remove propeller]

1) Using the pliers provided, straighten

the cotter-pin and pull it out.

2) Remove the propeller nut.

3) Remove the propeller.

1 Thrust washer

2 Propeller

3 Washer

4 Propeller nut

5 Cotter pin

602052

[How to install propeller]

1) Apply Yamaha Marine grease D or

Marine

grease

(water-resistant

grease) to the propeller-shaft.

2) Slide the propeller over the propeller-

shaft.

Be sure to install the thrust washer

before installing propeller, otherwise,

lower case and propeller boss may be

damaged.

602042

3) Tighten the propeller nut to the speci-

fied torque.

Tightening torque:

Refer to SPECIFICATIONS, Page 4-1

4) Align the propeller nut with the pro-

peller shaft hole. Insert a new cotter

pin in the hole and bend the cotter pin

ends.

NOTE:

When the propeller nut does not align

with the propeller shaft hole after tighten-

ing to the specified torque, then tighten it

more to align the hole.

Be sure to use a new cotter pin and bend

the ends over securely. Otherwise, the

propeller could come off during operation

and be lost.

602053

4-17

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EML20010

CHANGING GEAR OIL

Never get under the lower unit while it is

tilted, even when the tilt- support lever is

locked. Severe injury could occur if the

outboard accidentally falls.

1) Put the outboard in a vertical position

(not tilted).

Be sure the outboard is securely fastened

to the transom or a stable stand. You

could be severely injured if the outboard

falls on you.

2) Place a suitable container under the

gearcase.

102015

3) Remove the oil drain plug.

NOTE:

The oil drain plug is magnetic. Remove all

metal particles from the plug before rein-

stalling it.

4) Remove the oil level plug to allow the

oil to drain completely.

1 Oil-level plug

2 Oil drain-plug

601021

Inspect the used oil after it has been

drained. If the oil is milky, water is get-

ting into the gearcase which can cause

gear damage. Consult a Yamaha dealer

for repair of the lower unit seals.

NOTE:

For disposal of used oil consult your

Yamaha dealer.

4-18

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5) With the outboard motor in an verti-

cal position, using a flexible or pres-

surized filling device, inject outboard

motor hypoid gear oil (SAE 90) into

the oil drain plug hole.

Gear oil capacity:

Refer to SPECIFICATIONS, Page 4-1.

601015

6) When oil begins to flow out of the oil

level plug hole, insert and tighten the

oil level plug.

7) Insert and tighten in the oil drain

plug.

EML22010

CLEANING FUEL TANK

Gasoline (petrol) is highly flammable, and

its vapors are flammable and explosive.

8 If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

8 Keep away from sparks, cigarettes,

flames or other sources of ignition

when cleaning the fuel tank.

8 Remove the fuel tank from the boat

before cleaning it. Work only outdoors

in an area with good ventilation.

8 Wipe up any spilled fuel immediately.

8 Reassemble the fuel tank carefully.

Improper assembly can result in a fuel

leak, which could result in a fire or

explosion hazard.

8 Dispose of old gasoline according to

local regulations.

4-19

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To clean the fuel tank:

1) Empty the fuel tank into an approved

gasoline container.

2) Pour a small amount of suitable sol-

vent in the tank. Reinstall the cap and

shake the tank. Drain the solvent

completely.

To clean the fuel filter:

1) Remove the screws holding the fuel

meter assembly. Pull the assembly

out of the tank.

2) Clean the filter (located on the end of

the suction pipe) in a suitable clean-

ing solvent. Allow the filter to dry.

3) Replace the gasket with a new one.

Reinstall the fuel meter assembly and

tighten the screws firmly.

EML24010

INSPECTING AND REPLACING

ANODE

Yamaha outboard motor is protected

from corrosion by sacrificial anode.

Check the anode periodically. Remove the

scales from surfaces of the anode.

For the replacement of the anode, consult

a Yamaha dealer.

604011*

Do not paint the anode, for this would

render it ineffective.

4-20

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EML40010

CHECKING BOLTS AND NUTS

1) Check that bolts securing the cylinder

head and engine and the nut securing

the flywheel are tightened with their

specified tightening torques.

2) Check the tightening torques of other

bolts and nuts.

EMU00409

MOTOR EXTERIOR

EMU00410

Cleaning the Outboard Motor

After use, wash the exterior of the out-

board with fresh water.

Flush the cooling system with fresh

water.

NOTE:

Refer to Flushing Cooling System instruc-

tions in “TRANSPORTING AND STORING

OUTBOARD MOTOR”.

102031

Checking Painted Surface of Motor

Check the motor for scratches, nicks, or

flaking paint. Areas with damaged paint

are more likely to corrode.

If necessary, clean and paint the areas.

Consult a Yamaha dealer for touch-up

paint.

EML44010

COATING THE BOAT BOTTOM

A clean hull improves boat performance.

The boat bottom should be kept as clean

of marine growths as possible.

If necessary, the boat bottom can be coat-

ed with an anti-fouling paint approved for

your area to inhibit marine growth.

Do not use anti-fouling paint which

includes copper or graphite. These paints

can cause more rapid engine corrosion.

102025

4-21

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EMN00010

Chapter 5

TROUBLE RECOVERY

TROUBLESHOOTING ..............................5-1

TEMPORARY ACTION IN

EMERGENCY............................................5-5

Impact damege.....................................5-5

Starter will not operate........................5-6

Treatment of submerged motor.........5-8

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EMU01204¯

TROUBLESHOOTING

A problem in the fuel, compression, or ignition systems can cause poor starting, loss of

power, or other problems. The troubleshooting chart describes basic checks and possi-

ble remedies. (This chart covers all Yamaha outboard motors. Therefore, some items

may not apply to your model.)

If your outboard motor requires repair, bring it to a Yamaha dealer.

Trouble

Possible Cause

1. Fuel tank empty.

2. Fuel contaminated or stale.

3. Fuel filter clogged.

Remedy

1. Fill tank with clean, fresh fuel.

2. Fill tank with clean, fresh fuel.

3. Clean or replace filter.

4. Read "STARTING ENGINE"

section.

4. Starting procedure incorrect.

5. Fuel pump malfunctions.

5. Have serviced by a Yamaha

dealer.

6. Spark plug(s) fouled or incorrect

type.

7. Spark plug cap(s) fitted incorrectly.

8. Poor connections or damaged

ignition wiring.

6. Inspect spark plug(s). Clean or

replace with recommended type.

7. Check and re-fit cap(s).

8. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

9. Have serviced by a Yamaha

dealer.

A. Engine will not

start (Starter

operates).

9. Ignition parts faulty.

10. Engine stop switch lanyard not

attached.

10. Attach lanyard.

11. Shift lever in gear.

12. Engine inner parts damaged.

11. Shift to neutral.

12. Have serviced by a Yamaha

dealer.

5-1

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Trouble

Possible Cause

Remedy

1. Spark plug(s) fouled or incorrect

type.

2. Fuel system obstructed.

1. Inspect spark plug(s). Clean or

replace with recommended type.

2. Check for pinched or kinked fuel

line or other obstructions in fuel

system.

3. Fuel contaminated or stale.

4. Fuel filter clogged.

5. Failed ignition parts.

3. Fill tank with clean, fresh fuel.

4. Clean or replace filter.

5. Have serviced by a Yamaha

dealer.

6. Spark plug gap incorrect.

7. Poor connections or damaged

ignition wiring.

6. Inspect and adjust as specified.

7. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

8. Check and replace oil as specified.

9. Have serviced by a Yamaha

dealer.

8. Specified engine oil not used.

9. Thermostat faulty or clogged.

B. Engine idles

irregularly or stalls.

10. Carburetor adjustments incorrect.

11. Fuel pump damaged.

10. Have serviced by a Yamaha

dealer.

11. Have serviced by a Yamaha

dealer.

12. Air vent screw on the fuel tank

closed.

12. Open the air vent screw.

13. Choke knob pulled out.

14. Motor angle too high.

13. Return to home position.

14. Return to normal operating

position.

15. Carburetor clogged.

15. Have serviced by a Yamaha

dealer.

16. Fuel joint connection incorrect.

17. Throttle valve adjustment incorrect.

16. Connect correctly.

17. Have serviced by a Yamaha

dealer.

5-2

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Trouble

Possible Cause

1. Propeller damaged.

Remedy

1. Have propeller repaired or

replaced.

2. Propeller pitch or diameter incorrect.

3. Trim angle incorrect.

2. Install correct propeller to operate

outboard at its recommended

speed (r/min) range.

3. Adjust trim angle to achieve most

efficient operation.

4. Motor mounted at incorrect height

on transom.

4. Have motor adjusted to proper

transom height.

5. Boat bottom fouled with marine

growth.

5. Clean boat bottom.

6. Spark plug(s) fouled or incorrect

type.

7. Weeds or other foreign matter

tangled on gear housing.

8. Fuel system obstructed.

6. Inspect spark plug(s). Clean or

replace with recommended type.

7. Remove foreign matter and clean

lower unit.

8. Check for pinched or kinked fuel

line or other obstructions in fuel

system.

9. Fuel filter clogged.

9. Clean or replace filter.

10. Fill tank with clean, fresh fuel.

11. Inspect and adjust as specified.

12. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

13. Have serviced by a Yamaha

dealer.

C. Engine power loss.

10. Fuel contaminated or stale.

11. Spark plug gap incorrect.

12. Poor connections or damaged

ignition wiring.

13. Failed ignition parts.

14. Specified engine oil not used.

15. Thermostat faulty or clogged.

14. Check and replace oil with

specified type.

15. Have serviced by a Yamaha

dealer.

16. Air vent screw closed.

17. Fuel pump damaged.

16. Open the air vent screw.

17. Have serviced by a Yamaha

dealer.

18. Fuel joint connection incorrect.

18. Connect correctly.

19. Heat range of spark plug incorrect.

19. Inspect spark plug and replace it

with recommended type.

20. Have serviced by a Yamaha

dealer.

20. Engine not responding properly to

shift lever position.

5-3

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Trouble

Possible Cause

1. Propeller damaged.

Remedy

1. Have propeller repaired or

replaced.

2. Propeller shaft damaged.

2. Have serviced by a Yamaha

dealer.

D. Engine vibrates

excessively.

3. Weeds or other foreign matter

tangled on propeller.

3. Remove and clean propeller.

4. Motor mounting bolt loose.

5. Steering pivot loose or damaged.

4. Tighten bolt.

5. Tighten or have serviced by a

Yamaha dealer.

5-4

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EMN20010

TEMPORARY ACTION IN

EMERGENCY

EMH80010

IMPACT DAMAGE

The outboard motor can be seriously

damaged by a collision while operating

or trailering. Damage could make the out-

board motor unsafe to operate.

If the outboard motor hits any object in

the water, follow the procedure below;

1) Stop the engine immediately.

2) Inspect control system and all compo-

nents for damage. Also, inspect the

boat damage.

3) However damage is found or not

found, go back to a nearest harbor

slowly and carefully.

607011

4) Have a Yamaha dealer inspection of

the outboard motor, before operating

it again.

5-5

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EMN30110

STARTER WILL NOT OPERATE

If the starter mechanism does not operate

(engine cannot be cranked with the

starter), the engine can be started with an

emergency starter rope.

8 Use this procedure only in an emer-

gency and only to return to port for

repairs.

8 When the emergency starter rope is

used to start the engine, the start-in-

gear protection device does not oper-

ate. Make sure the transmission is in

neutral. Otherwise, the boat could

unexpectedly start to move, which

could result in an accident.

8 Be sure no one is standing behind you

when pulling the starter rope. It could

whip behind you and injure someone.

8 An unguarded rotating flywheel is very

dangerous. Keep loose clothing and

other objects away when starting the

engine. 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.

8 Do not touch the ignition coil, high

voltage wire, spark plug cap or other

electrical components when starting of

operating the motor. You could be

shocked.

5-6

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Procedure

1) Remove the top cowling.

301012

2) Remove the starter/flywheel cover by

removing the bolts.

NOTE:

On a model equipped with the start-in-

gear protection device (cable), disconnect

the cable from the starter.

208012

3) Prepare the engine for starting. See

"STARTING ENGINE" for procedures.

Be sure the engine is in Neutral and

that the lanyard is attached to the

engine stop switch.

On the electric start model the main

switch must be on if the main switch

is equipped.

407021**

EMR00001

4) To start the engine with emergency

starter rope, insert the knotted end of

the rope into the notch in the flywheel

rotor and wind the rope several turns

clockwise. Then, give a strong pull

straight out to crank the engine.

Repeat if necessary.

208014

5-7

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EMN50011

TREATMENT OF SUBMERGED

MOTOR

If the outboard motor is submerged,

immediately take it a Yamaha dealer. Oth-

erwise, some corrosion may begin almost

immediately. If you cannot immediately

take the outboard motor to a Yamaha

dealer, follow the procedure bellow for

taking care to minimize engine damage.

107012

1) Thoroughly wash away mud, salt,

seaweed, etc. with fresh water.

2) Remove the spark plugs and face the

spark plug holes downward to allow

any water, mud or contaminants to

drain.

3) Drain the fuel from the carburetor.

4) Feed fogging oil or engine oil through

the carburetors and spark plug holes

while cranking with the manual

starter or emergency starter rope.

5) Take the outboard motor to a Yamaha

dealer as soon as possible.

107013

Do not attempt to run the motor until it

has been completely inspected.

107014

5-8

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-MEMO-

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EMP00010

Chapter 6

INDEX

INDEX........................................................6-1

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EMP10010

Fuel hose joint..........................................2-2

Fuel meter.................................................2-2

Fuel tank....................................................2-2

Fuel tank cap.............................................2-2

Fueling instructions ...............................1-10

Gasohol...................................................1-11

Gasoline (petrol) ....................................1-11

Gasoline (petrol) and oil mixing.............3-6

Gear shift lever.........................................2-2

Greasing..................................................4-15

Identification numbers record................1-1

Impact damage ........................................5-5

Important labels.......................................1-5

Index..........................................................6-1

Inspecting and replacing anode...........4-20

Inspecting fuel filter...............................4-12

Installation ................................................3-1

INDEX

Adjusting idling speed ..........................4-13

Adjusting trim angle..............................3-18

Air vent screw...........................................2-2

Basic boating rules (Rules of the road) ..1-6

Breaking in (running in) engine..............3-8

Carrying handle........................................2-7

Changing gear oil...................................4-18

Checking bolts and nuts........................4-21

Checking fuel system ............................4-11

Checking painted surface of motor......4-21

Checking propeller.................................4-16

Checking wiring and connectors..........4-14

Choke knob...............................................2-4

Clamping the outboard motor................3-4

Cleaning and adjusting spark plug ........4-9

Cleaning and Anti-corrosion Measure...4-6

Cleaning fuel tank ..................................4-19

Cleaning the outboard motor...............4-21

Coating the boat bottom.......................4-21

Cruising in other conditions .................3-24

Cruising in salt water.............................3-24

Cruising in shallow water .....................3-20

Cruising in turbid water ........................3-24

Emission control information.................1-2

Engine oil................................................1-11

Engine stop button ..................................2-3

Engine stop lanyard switch.....................2-3

Exhaust leakage .....................................4-14

Filling fuel .................................................3-5

Filling fuel and engine oil........................3-5

Filling fuel tank.........................................4-4

Flushing cooling system and fogging

engine........................................................4-5

Forward...................................................3-14

Lubrication................................................4-6

Main components....................................2-1

Maintenance chart ...................................4-8

Motor exterior ........................................4-21

Mounting height ......................................3-3

Mounting the outboard motor ...............3-2

Operations of controls and other

functions ...................................................2-2

Outboard motor serial number ..............1-1

Periodic maintenance..............................4-7

Pre-operation checks...............................3-7

Propeller selection .................................1-12

Recoil starter handle................................2-4

Replacement parts...................................4-7

Reverse ...................................................3-15

Safety information...................................1-3

6-1

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Shifting....................................................3-14

Specification data ....................................4-1

Start-in-gear protection.........................1-13

Starter will not operate............................5-6

Starting engine.......................................3-10

Steering friction adjustment...................2-6

Stopping engine.....................................3-16

Storing outboard motor..........................4-4

Temporary action in emergency............5-5

Throttle control grip.................................2-4

Throttle friction adjustment....................2-5

Throttle indicator .....................................2-4

Tiller handle..............................................2-5

Tilt lock mechanism.................................2-6

Tilt support bar.........................................2-7

Tilting up/down......................................3-22

Top cowling lock lever ............................2-7

Trailering outboard motor ......................4-3

Transporting and storing outboard

motor.........................................................4-3

Treatment of submerged motor ............5-8

Trim angle adjusting rod.........................2-6

Trimming outboard motor....................3-17

Troubleshooting.......................................5-1

Warming up engine...............................3-13

Warning labels .........................................1-5

Warranty information .................Next page

Water leakage.........................................4-14

6-2

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EMU01599

IMPORTANT WARRANTY INFORMATION FOR U.S.A. AND

CANADA

Welcome to the Yamaha Family!

Congratulations on the purchase of your new Yamaha marine power. Yamaha is commit-

ted to exceptional customer satisfaction, and we want your ownership experience to be

a satisfying one. Please read the following warranty information to help ensure satisfac-

tion with your Yamaha.

Yamaha is ready to stand behind your purchase with strong warranty coverage. To be sure

you receive all the benefits of warranty, please take the following steps:

1. Be sure your new Yamaha is registered for warranty. Your boat dealer should do this at

the time of sale. Make sure your dealer gives you a copy of the completed Yamaha regis-

tration card for your records. If you are unsure whether or not your Yamaha is registered,

complete the Warranty Registration card found inside the cover of the Owner's Manual.

Mail it to the distributor for the country in which you live (see step 6 for the correct

address). If your Yamaha is not properly registered, a warranty repair could be unneces-

sarily delayed while registration records are checked.

2. Read the Limited Warranty statement which follows these instructions. This warranty

applies to Yamaha outboard motors sold in the United States, whether purchased sepa-

rately or when supplied as original equipment by a boat builder. The terms also apply to

original equipment packages sold in Canada, with coverage provided by Yamaha Motor

Canada (see ``Warranty Guide'' for Canadian models). This warranty explains the condi-

tions of the warranty, including the obligations that your dealer and you as the owner

have under the warranty. For example, your Yamaha outboard must receive a proper

pre-delivery inspection (PDI) by the selling dealer. Failure to take this important step

could jeopardize warranty coverage!

3. If you need warranty repairs, you must take your Yamaha outboard to an authorized

Yamaha outboard dealer. Be aware that not all selling boat dealers are authorized Yama-

ha dealers. Only authorized dealers have the factory training, special tools, and Yamaha

support needed to perform warranty repairs.

4. If you are away from home, or your selling dealer is not an authorized Yamaha dealer,

use the following toll-free numbers to find the nearest Yamaha dealer.

United States Dealer Locations: 1-800-692-6242

Canada Dealer Locations:

1-800-267-8577

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5. Your warranty applies specifically to repairs made in the country of purchase. If your

U.S.-purchased Yamaha needs warranty service while in Canada, or your Canadian pur-

chased Yamaha needs service while in the United States, Yamaha will assist the local

dealer whenever possible. However, some products available in one country may not be

sold or serviced in the other.

6. If you need any additional information about your Yamaha or warranty coverage which

your dealer cannot provide, please contact us directly.

Yamaha Motor Corporation, U.S.A.

P.O. Box 6555

Cypress, CA 90630

Attention: Customer Relations Department

Telephone No.

Fax No.

(714) 761-7439

(714) 761-7559

Yamaha Motor Canada Ltd.

480 Gordon Baker Road

Toronto, Ontario

M2H 3B4

Attention: Customer Relations Department

Telephone No.

Fax No.

(416) 498-1911

(416) 491-3122

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EMU00912*

YAMAHA MOTOR CORPORATION, U.S.A.

OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY

Yamaha Motor Corporation, U.S.A. is proud of its heritage and reputation for producing products with high standards of quality and

workmanship. Product excellence provides the cornerstone for our commitment to customer satisfaction. The Yamaha Outboard Limit-

ed Warranty is your assurance of this commitment.

This warranty provides you with protection against the expense of repairs for your outboard motor that are required as a result of

defects in materials or workmanship. When maintained and utilized in the prescribed manner, you can count on your Yamaha outboard

to provide reliable service.

This warranty provides you with specific coverage and notes your responsibilities in maintaining and operating your outboard. Please

take the time to read and become familiar with this warranty.

PERIOD OF WARRANTY. Any new Yamaha outboard motor purchased and registered with Yamaha Motor Corporation, U.S.A. for plea-

sure use in the United States, will be warranted against defects in material or workmanship for a period of two (2) years from date of

purchase, subject to exclusions noted herein. Any Yamaha outboard motor purchased and utilized for commercial applications will be

warranted for a period of one (1) year from the date of purchase, subject to exclusions noted herein. Yamaha peripheral equipment

included with the motor, such as gauges, fuel tanks and hoses, remote control boxes, propellers, and wiring external from the motor

unit, will be warranted for one (1) year from the date of purchase for either pleasure or commercial use. Replacement parts used in war-

ranty repairs will be warranted for the balance of the applicable warranty period.

The second year of warranty (if applicable) shall be limited to covering the cost of parts and labor for major components only. The major

components covered are:

Power Unit Section

8 Power Head

8 Intake Manifold and Reed Valve Assembly

8 Carburetor Assembly and its Related Components

8 Fuel and Oil Pump Assemblies

8 Ignition System (Standard and Microcomputer)

8 Precision Blend ® System

Bracket Section

8 Bracket System

8 Power Trim and Tilt Assembly

Lower Unit Section

8 Exhaust System

8 Upper Casing

8 Lower Unit Assembly

The warranty described here applies to outboard motor purchased and registered for use in the United States only excluding its territo-

ries. For warranty provisions outside the United States, contact the particular country’s local Yamaha distributor.

WARRANTY REGISTRATION. To be eligible for warranty coverage, the outboard motor must first be registered with Yamaha Motor Cor-

poration, U.S.A. A warranty registration form is provided in the Owner`s Manual with each outboard. This form must be completed and

mailed to Yamaha by either the selling dealer or the purchaser. Warranty registration can also be accomplished by any authorized

Yamaha outboard dealer. Upon receipt of the registration, an Owner`s Warranty Card will be sent by Yamaha to the registered purchas-

er.

OBTAINING REPAIRS UNDER WARRANTY. To receive repairs under this warranty, a valid Owner`s Warranty Card must be presented to

an authorized Yamaha outboard dealer.

During the period of warranty, any authorized Yamaha outboard dealer will, free of charge, repair or replace, at Yamaha`s option, any

parts adjudged defective by Yamaha due to faulty workmanship or material from the factory. All replaced parts will become the property

of Yamaha Motor Corporation, U.S.A.

CUSTOMER`S RESPONSIBILITY. Under the terms of this warranty, the customer will be responsible for ensuring that the outboard

motor is properly operated, maintained and stored as specified in the applicable Owner’s Manual.

The owner of the outboard motor shall give notice to an authorized Yamaha marine dealer of any and all apparent defects within ten

(10) days of discovery and make the motor available at that time for inspection and repairs at the dealer’s place of business.

GENERAL EXCLUSIONS FROM WARRANTY. This warranty will not cover the repair of damage if the damage is a result of abuse or

neglect of the product. Examples of abuse and neglect include, but are not limited to:

Racing or competition use, modification of original parts, abnormal strain.

Lack of proper maintenance and off-season storage as described in the Owner`s Manual, improper mounting of the motor, installa-

tion of parts or accessories that are not equivalent in design and quality to genuine Yamaha parts.

Operation of the motor at an rpm other than specified, improper propeller selection, use of lubricants, oils, and fuel/oil mixtures

that are not suitable for outboard motor use.

Damage as a result of accidents, collisions, contact with foreign materials, or submersion.

Growth of marine organisms on motor surfaces.

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SPECIFIC PARTS EXCLUDED FROM WARRANTY. Parts replaced due to normal wear or routine maintenance such as oil, spark plugs,

shear pins, propellers, hubs, fuel and oil filters, brushes for the starter motor and power tilt motor, water pump impellers, and anodes

are not covered by warranty. Charges for removal of the motor from a boat and transporting the motor to and from an authorized Yama-

ha outboard dealer are excluded from warranty coverage.

Specific parts excluded from the second year of warranty (if applicable) are:

8 Top and Bottom Cowling

8 Electric Components (other than ignition system)

8 Rubber Components (such as hoses, tubes, rubber seals, fittings, and clamps)

TRANSFER OF WARRANTY. Transfer of the warranty from the original purchaser to any subsequent purchaser is possible by having the

motor inspected by an authorized Yamaha outboard dealer and requesting the dealer to submit a change of registration to Yamaha

Motor Corporation, U.S.A. within ten (10) days of the transfer.

EMISSION CONTROL SYSTEM WARRANTY. Yamaha warrants to the ultimate purchaser and each subsequent purchaser, that this

engine is designed, built, and equipped so as to conform at the time of sale with applicable regulations under section 213 of the Clean

Air Act and this engine is free from defects in materials and workmanship which cause said engine to fail to conform with applicable

regulations for one (1) year from date of purchase.

YAMAHA MOTOR CORPORATION, U.S.A. MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND

TIME LIMITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPORATION, U.S.A. AND

EXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION

MAY NOT APPLY TO YOU. ALSO EXCLUDED FROM THIS WARRANTY ARE ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES

INCLUDING LOSS OF USE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUEN-

TIAL DAMAGES, SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE

TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.

Post Office Box 6555

Cypress, California 90630

WARRANTY QUESTIONS AND ANSWERS

Q. What costs are my responsibility during the warranty period?

A. The customer`s responsibility includes all costs of normal maintenance services, non-warranty repairs, accident and collision dam-

ages.

Q. What are some examples of ``abnormal’’ strain, neglect, or abuse?

A. These terms are general and overlap each other in areas. Specific examples include:

Running the machine out of oil, operating the machine with a broken or damaged part which causes another part to fail, damage or

failure due to improper or careless transportation, and/or tie down. If you have any specific questions on operation or mainte-

nance, please contact your Yamaha outboard dealer for advice.

Q. Does the warranty cover incidental costs such as towing or transportation due to a failure?

A. No. The warranty is limited to repair of the machine itself.

Q. May I perform any or all of the recommended maintenance shown in the Owner’s Manual instead of having the dealer do them?

A. Yes, if you are a qualified mechanic and follow the procedures specified in the Owner’s and Service Manuals. We do recommend,

however, that items requiring special tools or equipment be done by a Yamaha outboard dealer.

Q. Will the warranty be void or canceled if I do not operate or maintain my new outboard exactly as specified in the Owner’s Manual?

A. No. The warranty on a new outboard cannot be ’’voided`` or ’’canceled``. However, if a particular failure is caused by operation or

maintenance other than as shown in the Owner’s Manual, that failure may not be covered under warranty.

Q. What responsibility does a Yamaha outboard dealer have under this warranty?

A. Each Yamaha outboard dealer is expected to:

1. Completely set up each outboard he sells prior to delivery.

2. Explain the operation, maintenance, and warranty requirements to your satisfaction at the time of sale, and upon your request

at any later date.

In addition, each Yamaha outboard dealer is held responsible for his setup, service and warranty repair work.

Q. Is the warranty transferable to second owners?

A. Yes. The remainder of any existing warranty can be transferred upon request. The unit has to be inspected and re-registered by an

authorized Yamaha outboard dealer for the policy to remain effective.

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CUSTOMER SERVICE

If your machine requires warranty service, you must take it to any authorized Yamaha outboard dealer within the continental United

States. Be sure to bring your warranty registration identification or other valid proof of the original date of purchase. If a question or

problem arises regarding warranty, first contact the owner of the dealership. Since all warranty matters are handled at the dealer level,

this person is in the best position to help you. If you are still not satisfied and require additional assistance, please write:

YAMAHA MOTOR CORPORATION U.S.A.

CUSTOMER RELATIONS DEPARTMENT

P.O.Box 6555

Cypress, California 90630

When contacting Yamaha Motor Corporation, U.S.A. don’t forget to include any important information such as names, addresses,

model, engine serial number, dates, and receipts.

CHANGE OF ADDRESS

The federal government requires each manufacturer of a motor vehicle to maintain a complete, up-to-date list of all first purchasers

against the possibility of a safety-related defect and recall. This list is complied from the purchase registrations sent to Yamaha Motor

Corporation, U.S.A. by the selling dealer at the time of your purchase.

If you should move after you have purchased your new outboard, please advise us of your new address by sending a postcard listing

your outboard model name, engine serial number, dealer number (or dealer’s name) as it is shown on your warranty identification, your

name and new mailing address. Mail to:

YAMAHA MOTOR CORPORATION, U.S.A.

WARRANTY DEPARTMENT

P.O.Box 6555

Cypress, California 90630

This will ensure that Yamaha Motor Corporation, U.S.A. has an up-to-date registration record in accordance with federal law.

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EMU01178

IMPORTANT WARRANTY INFORMATION

IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA

Welcome to the Yamaha Family!

Congratulations on the purchase of your new Yamaha marine power. Yamaha is com-

mitted to exceptional customer satisfaction, and we want your ownership experience

to be a satisfying one. Please read the following warranty information to help ensure

satisfaction with your Yamaha.

This model was manufactured as a U.S.A. specification model, and the warranty state-

ment shown in this manual is for market. To receive the benefits of the warranty that

applies to the country in which you use your Yamaha, please note the following infor-

mation.

1. The warranty on this model is the same as equivalent models sold in the country

where you will receive service. If you need more information about your warranty

coverage or your Yamaha outside the U.S.A. or Canada, please contact an autho-

rized Yamaha dealer in your country.

2. Keep a copy of your sales contract or invoice for the purchase of your Yamaha and

present it if you need warranty repairs. This document should show the date of

purchase, which is important evidence the repairing dealer will need to be sure

your Yamaha is covered by warranty.

3. If your Yamaha needs warranty repairs, contact an authorized Yamaha dealer in

the country where you are. He will explain how to get warranty service in that

country.

4. This Yamaha model may not be sold in some countries. Therefore, in some cases

your local dealer may not have all the parts or service information he may need,

which may unavoidably delay repairs. If this happens, we thank you for your

understanding and assure you we will attempt to resolve the situation as quickly as

possible.

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Printed in Japan

March 2001—0.5 × 1 !

63V-28199-14

(9.9FMH/15FMH)

(E)

Printed on recycled paper

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