Operating & Maintenance
Instructions
Model Series
Covered in
This Manual
351700
380700
381700
Model
Type
Code
Note: General Model Series numbers noted above include many specific numbers
like the ones on your engine. To get replacement parts or technical assistance in
the future, write your engine Model, Type, Code and date of purchase here.
Month Day Year
TABLE OF CONTENTS
WARNING
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Engine Information . . . . . . . . . . . . . . . . . . . . . . . . 6
Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Fuel and Starting Information . . . . . . . . . . . . . . . 8
Starting and Stopping . . . . . . . . . . . . . . . . . . . 9-10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15
Parts and Service & Storage . . . . . . . . . . . . . . . 16
Warranty Information . . . . . . . . . . . . . . . . . . . . . 17
Briggs & Stratton does not approve or authorize the use of
these engines on 3-wheel All Terrain Vehicles (ATVs), motor
bikes, aircraft products or vehicles intended for use in
competitive events. Use of these engines in such applications
could result in property damage, serious injury (including
paralysis), or even death.
In the USA and Canada our 24 hour hotline is
1-800-233-3723
Briggs & Stratton Corporation
Milwaukee, Wisconsin 53201
PRINTED IN U.S.A.
Copyright 1999 by Briggs & Stratton Corporation
FORM NO. 274276-10/99
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274276
BEFORE OPERATING ENGINE
• Read entire Operating & Maintenance Instructions AND
the instructions for the equipment this engine powers.*
• Failure to follow instructions could result in serious injury
or death.
THE OPERATING & MAINTENANCE INSTRUCTIONS
CONTAIN SAFETY INFORMATION TO
• Make you aware of hazards associated with engines
• Inform you of the risk of injury associated with those hazards, and
• Tell you how to avoid or reduce the risk of injury.
The safety alert symbol
information about hazards that can result in personal injury.
( )
is used to identify safety
HAZARD SYMBOLS AND MEANINGS
A signal word (DANGER, WARNING, or CAUTION) is
used with the alert symbol to indicate the likelihood and the
potential severity of injury. In addition, a hazard symbol
may be used to represent the type of hazard.
Fire
Moving Parts
DANGER indicates a hazard which, if not
avoided, will result in death or serious injury.
Shock
Explosion
WARNING indicates a hazard which, if not
avoided, could result in death or serious injury.
Hot Surface
Toxic Fumes
CAUTION indicates a hazard which, if not
avoided, might result in minor or moderate
injury.
CAUTION, when used without the alert symbol,
indicates a situation that could result in damage
to the engine.
Kickback
WARNING
The engine exhaust from this prod-
uct contains chemicals known to the
State of California to cause cancer,
birth defects, or other reproductive
harm.
* Briggs & Stratton does not necessarily know what equipment this engine will power. For that reason, you should carefully
read and understand the operating instructions for the equipment on which your engine is placed.
3
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SAFETY
WARNING
WARNING
Unintentional sparking can result in fire or electric
shock.
Gasoline and its vapors are extremely flammable
and explosive.
Unintentional start-up can result in entanglement,
traumatic amputation, or laceration.
Fire or explosion can cause severe burns or death.
WHEN ADDING FUEL
• Turn engine OFF and let engine cool at least 2
BEFORE PERFORMING ADJUSTMENTS OR
REPAIRS
minutes before removing gas cap.
• Fill fuel tank outdoors or in well-ventilated area.
• Do not overfill fuel tank. Fill tank to approximately
1-1/2 inches below top of neck to allow for fuel
expansion.
• Disconnect spark plug wire and keep it away from
spark plug.
• Disconnect battery at negative terminal (only
engines with electric start).
• Keep gasoline away from sparks, open flames,
pilot lights, heat, and other ignition sources.
WHEN TESTING FOR SPARK
• Use approved spark plug tester.
• Check fuel lines, tank, cap, and fittings frequently
for cracks or leaks. Replace if necessary.
• Do not check for spark with spark plug removed.
WHEN STARTING ENGINE
• Make sure spark plug, muffler, fuel cap and air
cleaner are in place.
• Do not crank engine with spark plug removed.
WARNING
• If fuel spills, wait until it evaporates before starting
engine.
• If engine floods, set choke to OPEN/RUN position,
place throttle in FAST and crank until engine starts.
Starting engine creates sparking.
Sparking can ignite nearby flammable gases.
Explosion and fire could result.
WHEN OPERATING EQUIPMENT
• Do not tip engine or equipment at angle which
causes gasoline to spill.
• Do not choke carburetor to stop engine.
WHEN TRANSPORTING EQUIPMENT
• If there is natural or LP gas leakage in area, do not
start engine.
• Transport with fuel tank EMPTY or with fuel shut-off
• Do not use pressurized starting fluids because
valve OFF.
vapors are flammable.
WHEN STORING GASOLINE OR EQUIPMENT
WITH FUEL IN TANK
• Store away from furnaces, stoves, water heaters or
other appliances that have pilot light or other
ignition source because they can ignite gasoline
vapors.
4
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SAFETY
WARNING
WARNING
Engines give off carbon monoxide, an odorless,
colorless, poison gas.
Rotating parts can contact or entangle hands, feet,
hair, clothing, or accessories.
Breathing carbon monoxide can cause nausea,
fainting or death.
Traumatic amputation or severe laceration can
result.
• Start and run engine outdoors.
• Operate equipment with guards in place.
• Keep hands and feet away from rotating parts.
• Tie up long hair and remove jewelry.
• Do not start or run engine in enclosed area, even if
doors or windows are open.
• Do not wear loose-fitting clothing, dangling
drawstrings or items that could become caught.
WARNING
WARNING
Running engines produce heat. Engine parts,
especially muffler, become extremely hot.
Severe thermal burns can occur on contact.
Combustible debris, such as leaves, grass, brush,
etc. can catch fire.
Rapid retraction of starter cord (kickback) will pull hand
and arm toward engine faster than you can let go.
Broken bones, fractures, bruises or sprains could
result.
• Allow muffler, engine cylinder and fins to cool
before touching.
• Remove accumulated combustibles from muffler
• When starting engine, pull cord slowly until
area and cylinder area.
resistance is felt, then pull rapidly.
• Install and maintain in working order a spark
arrester before using equipment on forest-covered,
grass-covered, brush-covered unimproved land.
The state of California requires this (Section 4442
of the California Public Resources Code). Other
states may have similar laws. Federal laws apply
on federal land.
• Remove all external equipment/engine loads
before starting engine.
• Direct coupled equipment components such as,
but not limited to, blades, impellors, pulleys,
sprockets, etc., must be securely attached.
5
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ENGINE PARTS
10
3
9
11
2
8
4
1
12
7
13
5
14
1. Air cleaner
2. Carburetor
6
9. Rotating screen
10. Emission label
3. Rewind starter (if equipped)
4. Blower housing
5. Oil filter (if equipped)
6. Spark plug wire
7. Oil drain plug
11. Engine
Model
xxxxxx
Type
xxxx xx
Code
xxxxxxxx
12. Fuel pump
13. Exhaust manifold
14. 12V electric starter
8. Oil fill/Dipstick
GENERAL INFORMATION
ENGINE MODEL
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
THE INTERNATIONAL SYMBOLS USED
ON THE ENGINE OR
IN THIS MANUAL INCLUDE:
In the state of California, Model Series 350000 and 380000
engines are certified by the California Air Resources Board
to meet emissions standards for 250 hours. Such certifica-
tion does not grant the purchaser, owner or operator of this
engine any additional warranties with respect to the
performance or operational life of this engine. This engine
is warranted solely according to the product and emissions
warranties stated elsewhere in this manual.
Read Owner’s
Safety Alert
On Off
Manual
Oil
Stop
Fuel
MODEL SERIES 350000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.83 in. (72 mm)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.76 in. (70 mm)
Displacement . . . . . . . . . . . . . . . . . . . 34.7 cu. in. (570 cc)
Fuel Shutoff
Choke
MODEL SERIES 380000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.97 in. (75.5 mm)
TUNE-UP SPECIFICATIONS
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.76 in. (70 mm)
Displacement . . . . . . . . . . . . . . . . . . . 38.2 cu. in. (627 cc)
Armature air gap . . . 0.008 – 0.012 in. (0.20 – 0.30 mm)
Spark plug gap . . . . . . . . . . . . . . . . . . 0.030 in. (0.76 mm)
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center (check when engine is cold).
See Repair Manual P/N 272144.
Intake . . . . . . . . . . . . . 0.004 – 0.006 in. (0.10 – 0.15 mm)
Exhaust . . . . . . . . . . . 0.004 – 0.006 in. (0.10 – 0.15 mm)
For practical operation, the horsepower loading should not
exceed 85% of rated horsepower. Engine power will de-
crease 3-1/2% for each 1,000 feet (300 meters) above sea
level and 1% for each 10° F (5.6° C) above 77° F (25° C).
Engine will operate satisfactorily at an angle up to 15°.
6
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274276
OIL
SAE Viscosity Grades
CAUTION: This engine is shipped from Briggs &
Stratton without oil. Check oil level before starting
engine. If you start the engine without oil, the engine
will be damaged beyond repair and will not be
covered under warranty.
**
*
OIL CAPACITY
-20
-30
0
20
32 40
0
60
80
100
40
°F
°C
Engine holds approximately 1-1/2 quarts (48 ounces or 1.4
liters) when changing oil and filter.
-20
-10
10
20
30
STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
TYPE OF OIL TO USE
*
CAUTION: Air cooled engines run hotter than
automotive engines. The use of non-synthetic
multi-viscosity oils (5W-30, 10W-30, etc.) in
temperatures above 40° F (4° C) will result in higher
than normal oil consumption. When using a
multi-viscosity oil, check oil level more frequently.
• Use a high quality detergent oil classified “For Service
SF, SG, SH, SJ” or higher, such as Briggs & Stratton
30W, Part Number 100005 (20 oz) or 100028 (48 oz).
• Do not use special additives.
• Choose a viscosity according to the table opposite.
** CAUTION: SAE 30 oil, if used below 40° F (4° C), will
result in hard starting and possible engine bore
damage due to inadequate lubrication.
Note: Synthetic oil meeting ILSAC GF-2, API
certification mark and API service symbol
(shown at left) with “SJ/CF ENERGY CON-
SERVING” or higher, is an acceptable oil at all
temperatures. Use of synthetic oil does not
alter required oil change intervals.
CHECKING AND ADDING OIL
• Check oil level before starting the engine.
• Check level daily, or after every eight (8) hours.
• Keep oil level at FULL.
• Do not overfill.
Oil checking procedure: before starting engine, check oil level.
Oil Fill
[1] Place engine level. Clean
around oil fill and dipstick.
[2] Remove dipstick and
wipe clean with cloth.
[3] Tighten dipstick down.
Remove & check oil level.
Oil filling procedure: first add 1 quart (32 ounces or 1 liter). Start and run engine at idle for 30 seconds. Shut engine off and
wait 30 seconds. Then add more oil slowly to bring level to Full mark on dipstick.
FULL
[4] Remove oil fill cap (if
equipped). Pour oil slowly.
[5] Fill to FULL line on
[6] Replace dipstick firmly.
dipstick – recheck.
7
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FUEL
• This engine is certified to operate on gasoline. Exhaust
TYPE OF FUEL TO USE
Emission Control System: EM (Engine Modifications).
• Use clean, fresh, regular unleaded gasoline with a
minimum of 85 octane. Fresh fuel prevents gum from
forming in the fuel system or on essential carburetor parts.
Purchase fuel in quantity that can be used within 30 days.
• Do not use gasoline which contains Methanol.
• Do not mix oil with gasoline.
• For engine protection use Briggs & Stratton Gasoline
Additive available from your Authorized Briggs &
Stratton Dealer (P/N 5041 or single use pouch).
CAUTION: Some fuels, called oxygenated or reformu-
lated gasoline, are gasoline blended with alcohols or
ethers. Excessive amounts of these blends can damage
the fuel system or cause performance problems. If any
undesirable operating symptoms occur, use gasoline
with a lower percentage of alcohol or ether.
ADDING FUEL
WARNING
[1] Fill fuel tank outdoors or in well-ventilated area,
away from sparks, open flames, pilot lights, heat,
and other ignition sources.
[4] Remove cap. Fill tank to approximately 1-1/2 inches
below top of neck to allow for fuel expansion. Be
careful not to overfill.
Briggs & Stratton Smart-fill fuel can fills to the
correct level and automatically shuts off, reducing
spills and emissions.
[2] If fuel spills, wait until it evaporates before starting
engine.
[3] Turn engine OFF and let engine cool at least 2
minutes before removing gas cap.
[5] Replace cap before starting.
STARTING
OIL PRESSURE SWITCH
WARNING
If engine is equipped with an oil pressure switch, the switch
will either activate a warning device or stop the engine
when the engine runs low on oil. (Read the operating
instructions supplied by the equipment manufacturer to
determine which way your engine is equipped because the
equipment manufacturer supplies the oil pressure gauge.)
See OIL PRESSURE on page 12 for oil filling instructions.
• Do not use pressurized starting fluids.
• Vapors are flammable.
STARTING AND OPERATING TIPS
♦ Store and fuel equipment in level position.
♦ Use fresh fuel. (See Fuel.)
♦ Periodically remove grass buildup under mower
deck. (See Maintenance.)
♦ Use correct type of oil for expected starting
♦ After engine has started, let it warm up several
seconds to several minutes, depending on outside
temperature.
temperature. (See Oil.)
♦ Remove external equipment/engine loads. (See
equipment operating instructions.)
♦ For maximum performance and life, operate engine
with choke in RUN and throttle in FAST.
♦ Start lawn mower on hard surface or over previously
cut grass.
8
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STARTING AND STOPPING
REWIND (MANUAL) STARTER
TO START ENGINE
FULL
Choke
[2] Open fuel shut-off valve
(if equipped).
[4] Move throttle (if equipped)
to FAST. Operate engine
with throttle in FAST.
[3] Move choke control to
CHOKE or START.
[1] Check oil level (see p. 7).
[7] Let engine warm up.
Choke Equipped: Move
choke
control
lever
toward RUN a short dis-
tance at a time over sev-
eral seconds in warm
weather or minutes in cold
weather. Let engine run
smoothly before each
change. Operate with
choke in RUN.
STOP RUN
WARNING
[5] Push rocker switch (if
equipped) to ON or RUN.
[6] Grasp rope handle. Pull
slowly until resistance is
felt, then pull rapidly to
start engine and avoid
kickback.
TO STOP ENGINE
CAUTION: Do not stop engine by moving choke
control to CHOKE. Backfire, fire or engine damage
could occur.
STOP RUN
[2] Push rocker switch (if
equipped) to OFF or
STOP.
[1] Move
throttle
(if
equipped) to SLOW,
then to STOP.
[3] Close fuel shut-off valve
(if equipped).
9
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STARTING AND STOPPING
ELECTRIC (KEY) STARTER (if equipped)
TO START ENGINE
FULL
Choke
[2] Open fuel shut-off valve
(if equipped).
[4] Move throttle to FAST (if
equipped). Operate en-
gine with throttle in FAST.
[3] Move choke control to
CHOKE or START.
[1] Check oil level (see p. 7).
[7] Let engine warm up.
Choke Equipped: Move
choke
control
lever
toward RUN a short dis-
tance at a time over sev-
eral seconds in warm
weather or minutes in cold
weather. Let engine run
smoothly before each
change. Operate with
choke in RUN.
STOP RUN
[5] Push rocker switch (if
equipped) to ON or RUN.
[6] Insert key and turn to
START.
CAUTION: To prolong starter life, use short
starting cycles (5 seconds maximum, then wait
one minute). Follow equipment manufacturer’s
recommendations for charging battery.
TO STOP ENGINE
STOP RUN
[3] Push rocker switch (if
equipped) to OFF or
STOP.
[2] Turn key to OFF.
Remove key and store
out of reach of children.
[1] Move
throttle
(if
[4] Close fuel shut-off valve
(if equipped).
equipped) to SLOW.
10
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MAINTENANCE
MAINTENANCE
EMISSION CONTROL
Regular maintenance will improve the performance and
extend the life of the engine. See any Authorized Briggs &
Stratton Dealer for service. Use only genuine Briggs &
Stratton parts. Other parts may not perform as well,
may damage the engine, and may result in injury. In
addition, use of other parts may void your warranty.
Maintenance, replacement or repair of the emission
control devices and systems may be performed by any
nonroad engine repair establishment or individual.
However, to obtain no charge repairs under the terms and
provisions of the Briggs & Stratton warranty statement, any
service or emission control part repair or replacement must
be performed by a factory authorized dealer.
Follow the instructions and schedules indicated below.
Task
Perform task at hourly
or calendar interval,
whichever comes first.
Check oil level
Change oil
4
CHANGING OIL
4*
Change oil filter
(if equipped)
4
Service air cleaner
pre-cleaner
4*
*
PIPE
Service air cleaner
cartridge
4*
*
Typical
drain plug
OIL DRAIN
PLUG
Inspect spark arrester
(if equipped)
4
[1] Place engine level.
WARNING
Clean oil cooler
(if equipped)
4*
*
[2] Disconnect spark plug
wires and keep away
from spark plugs. Dis-
connect battery (if equip-
ped with electric starter)
4*
*
Clean cooling system
at negative terminal.
[3] With engine OFF but still warm remove oil drain
plug and drain oil into appropriate receptacle.
Clean/replace
spark plugs
4
Clean/replace in-line
fuel filter (if equipped)
4
4
[4] Reinstall drain plug. Remove dipstick.
[5] Fill to FULL mark on dipstick with new oil.
Check valve clearance
Do not overfill.
Note: Engine holds approximately 1-1/2 quarts
(48 ounces or 1.4 liters) when changing oil and filter.
*
Change oil after first 5 to 8 hours of use, then every
50 hours or every season. Change oil every 25 hours
when operating the engine under heavy load or in high
temperatures.
[6] Replace dipstick.
** Clean more often under dusty conditions or when
airborne debris is present. Replace air cleaner parts, if
very dirty.
CAUTION: Used oil is a hazardous waste product.
Dispose of used oil properly. Do not discard with
household waste. Check with your local authorities,
service center, or dealer for safe disposal/recycling
facilities.
11
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MAINTENANCE
AIR CLEANER
All engines have a round air cleaner cartridge. In addition,
some engines have a pre-cleaner.
CHANGING OIL FILTER (if equipped)
Change oil filter after every 100 hours or every season.
CLEANING PRE-CLEANERS AND CARTRIDGES
CAUTION: Do not use pressurized air or solvents to
clean cartridge. Pressurized air can damage
cartridge; solvents will dissolve cartridge.
OIL FILTER P/N
SEE PAGE 15
Pre-cleaner
To clean pre-cleaner (if equipped), separate it from
cartridge and wash in liquid detergent and water. Squeeze
dry in a clean cloth. Saturate in engine oil. Squeeze in
clean, absorbent cloth to remove all EXCESS oil.
[1] Drain engine oil and remove oil filter.
[2] Before installing new filter, lightly oil filter gasket
with fresh, clean oil.
Cartridge
To clean cartridge, gently tap on a flat surface.
[3] Screw filter on by hand until gasket contacts oil
filter adapter. Tighten 1/2 to 3/4 turn more.
[4] Add fresh oil. Fill to FULL line on dipstick.
[5] Start and run engine at idle to check for leaks.
[6] Stop engine. Re-check oil level. Add oil if required.
REMOVING AND INSTALLING AIR CLEANER
OIL PRESSURE
FOAM PRE-CLEANER
& CARTRIDGE P/N’s
SEE PAGE 16
2
If oil pressure drops below 1-4 psi (.1-.2 kg/cm ), an oil
pressure switch (if engine is equipped) will either activate a
warning device or stop the engine. Check oil level with
dipstick. If oil level is between ADD and FULL mark on
dipstick, Do not try to restart engine. Contact an Authorized
Briggs & Stratton Service Dealer. Do not operate engine
until oil pressure is corrected.
BODY
PLATE
If oil level is below ADD mark on dipstick, add oil to bring
level to FULL mark. Restart engine and check oil pressure.
If pressure is normal, continue to operate engine.
KNOB
Note: Oil pressure gauge, if engine is equipped, is supplied
by manufacturer of equipment.
COVER
CLIPS
Dual element air cleaner
SPARK PLUG
Use only Briggs & Stratton Spark Tester (part number
19368) to check for spark.
[1] Unhook clips on both sides of cover and remove cover.
[2] Remove knob and plate. Carefully remove air cleaner
assembly to prevent debris from entering carburetor.
.030” (0.76 mm)
In some areas, local law
WIRE GAGE
requires using resistor spark
plug to suppress ignition sig-
nals. If this engine was origi-
nally equipped with resistor
spark plug, use same type
[3] Reassemble clean (or new) pre-cleaner on clean (or
new) cartridge.
[4] Reinstall air cleaner assembly, plate and knob in body.
[5] Replace cover and reattach clips to body.
RESISTOR P/N 491055
for replacement.
RESISTOR P/N 496018
12
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MAINTENANCE
ENGINE AND ENGINE PARTS
We recommend that you see an authorized Briggs & Stratton Service Dealer for all maintenance and service of the engine
and engine parts. Use only genuine Briggs & Stratton parts.
If you perform any maintenance on the engine, first disconnect the spark plug wires
from the spark plugs, and disconnect the battery at the negative terminal (electric
WARNING
starter engines only) to prevent unintentional sparking. Unintentional sparking can
result in fire or electric shock. Unintentional start-up can result in entanglement,
traumatic amputation or laceration. Use only correct tools.
• Do not strike the flywheel with a hammer or hard object because the flywheel may
later shatter during operation.
WARNING
• Do not tamper with governor spring, links or other parts to increase engine speed.
MUFFLER
AIR COOLING SYSTEM
Replacement parts for the
muffler must be the same and
installed in the same position
as the original parts, other-
wise fire can occur.
Debris may clog the engine’s air cooling system. Remove
blower housing and clean area shown to prevent overheat-
ing and engine damage.
WARNING
If muffler is equipped with spark
arrestor
screen,
remove
screen for inspection. Replace screen if damaged or plugged.
FUEL SYSTEM
Replacement parts for fuel
system (cap, hoses, tanks,
WARNING
filters, etc.) must be the same
as original parts, otherwise
fire can occur.
CLEAN AREAS
OF ALL DIRT
AND DEBRIS
FUEL FILTER (if equipped)
OIL COOLER (if equipped)
FILTER
Clean oil cooler of
all debris and chaff.
PART NO. 493629
(WITH FUEL PUMP)
[1] Disconnect spark plug
WARNING
wires and keep away
from spark plugs.
[2] Drain fuel tank or close
fuel shut-off valve before
replacing
fuel
filter.
VALVE CLEARANCE
Otherwise, fuel can leak
out, creating a fire/explo-
sion hazard.
Check valve clearance yearly. (See Tune-up Specifications
on page 6).
13
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MAINTENANCE
CLEANING DEBRIS
CAUTION: Do not use water to clean engine parts.
Water could contaminate fuel system. Use a brush
or dry cloth.
Daily or before every use, clean accumulated debris from
engine. Keep linkage, springs and controls clean. Keep
area around and behind muffler free of any combustible
debris.
CLEAN
Engine parts should be kept
WARNING clean to reduce the risk of
overheating and ignition of accu-
Linkage, Springs and Controls
mulated debris. This is especial-
ly important if cutting tall grass.
SPARK
ARRESTER
ROTATING SCREEN
CLEAN
REWIND
STARTER
GUARD
Muffler and Spark Arrester
Finger Guard or Rotating Screen
ADJUSTMENTS
TO ADJUST REMOTE CHOKE CONTROL
CONTROL ADJUSTMENTS
WARNING
PULL
CHOKE
CLOSED
TO CHOKE
WIRE AND
CASING
Prevent unintentional starting.
SCREW
Before performing adjustments:
• Remove spark plug wires from spark plugs.
[1] Remove air cleaner.
• Disconnect battery at negative terminal (only
[2] Move choke control to CHOKE or START position.
(Carburetor choke should be completely closed.)
engines with electric start).
[3] If not, loosen casing clamp screw.
[4] Then move casing, wire and engine choke lever in
direction shown until choke is completely closed.
[5] Tighten casing clamp screw. Replace air cleaner.
14
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ADJUSTMENTS
TO ADJUST REMOTE THROTTLE CONTROL
If the engine does not start or if it runs roughly, the remote
throttle control may need adjustment. See your authorized
Briggs & Stratton dealer or follow the instructions below.
CASING CLAMP SCREW
SWIVEL
EXHAUST
MANIFOLD
GOVERNED IDLE SPRING
(RED OR WHITE)
Governed idle spring
[1] Readjust the idle speed to 1200 rpm, if governed idle
spring is red, or 900 rpm, if governed idle spring is white.
[2] Release carburetor throttle lever. Move throttle
control to FAST position. Engine should accelerate
smoothly. If it does not, readjust idle mixture valves
slightly counterclockwise.
EXHAUST MANIFOLD
THROTTLE STOP
[1] Remove air cleaner. Move throttle control to FAST.
(Swivel should be against throttle stop.)
[2] If not, loosen casing clamp screw. Move casing
and wire in direction shown by arrow until swivel is
against throttle stop.
Engines operated at about 3000 to 5000 feet (900 to 1500
meters) above sea level may require a high altitude carbu-
retor main jet. If erratic performance is observed, contact a
Briggs & Stratton Authorized Service Dealer for cost to
install/purchase a high altitude carburetor main jet.
[3] Tighten casing clamp screw. Replace air cleaner.
CARBURETOR ADJUSTMENT
WARNING
The manufacturer of the equipment on which this
engine is installed specifies top speed at which the
engine will be operated. DO NOT EXCEED this speed.
Differences in fuel, temperature, altitude or load may require
minor carburetor adjustment. Air cleaner and its cover must
be assembled to carburetor before starting engine.
The carburetor on this engine is low emission. It is
equipped with an idle mixture valve with a limiter (see
inset), which allows some adjustment, and an idle speed
adjustment screw. DO NOT remove limiter caps. DO NOT
force beyond limits.
TO ADJUST CARBURETOR
IDLE SPEED SCREW
CARBURETOR
THROTTLE LEVER
CYL # 1
IDLE MIXTURE
VALVES
LIMITER CAP
CYL # 2
[1] Start engine and warm up approximately 5 minutes
before adjusting.
[2] With engine running, place throttle control in SLOW.
[3] Rotate carburetor throttle lever against the idle
speed screw and hold it.
[4] Turn idle speed screw to obtain 1200 rpm.
[5] While still holding carburetor throttle lever against
idle speed screw, set cylinder #1 idle mixture valve
midway between limits.
[6] Then set cylinder #2 idle mixture valve midway
between limits.
15
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SERVICE & STORAGE
PARTIAL LIST OF GENUINE BRIGGS & STRATTON PARTS
BRIGGS & STRATTON
PART NO. (or equivalent)
SERVICE
PART
See an Authorized Briggs & Stratton Service Dealer. Each
one carries a stock of Genuine Briggs & Stratton Parts and
is equipped with special service tools. Trained mechanics
assure expert repair service on all Briggs & Stratton
engines. Only dealers advertising as “Authorized Briggs &
Stratton” are required to meet Briggs & Stratton standards.
Air cleaner cartridge (351700)
394018
272490
5050
692519
692520
Air cleaner pre-cleaner (351700)
Air cleaner pre-cleaner and cartridge (351700)
Air cleaner cartridge (380700)
Air cleaner pre-cleaner (380700)
When you purchase equipment powered by a
Briggs & Stratton engine, you are assured of
highly skilled, reliable service at more than
Oil
100005 or 100028
491056
Oil filter (3-1/2 in. long)
Oil filter (2-1/4 in. long)
Fuel filter
492932 or 5049
493629
30,000
Authorized
Service
Dealers
worldwide, including more than 3,500 Master
Service Technicians. Look for these signs
wherever Briggs & Stratton service is offered.
Gas additive
5041
Resistor spark plug (Champion RC12YC)
Resistor spark plug (Champion RC14YC)
Long life platinum spark plug
(used on most OHV engines)
Spark plug wrench
491055
496018
5066
You may locate your nearest Authorized Briggs & Stratton
Service Dealer in our dealer locator map on our web site
directory under “Engines, Gasoline” or “Gasoline
Engines,” or “Lawn Mowers” or similar category.
An illustrated shop manual includes com-
mon specifications and detailed informa-
tion covering adjustment, tune-up and
repair of Briggs & Stratton OHV, twin
cylinder, 4 cycle engines. It is available for
purchase from an Authorized Briggs &
Stratton Service Dealer or you can order it
from the factory. Write: Briggs & Stratton
19374
19368
5056
Spark tester
Oil pump kit
(uses standard electric drill to remove oil from engine quickly)
Corporation, Attn: Service Division
P. O. Box 1144, Milwaukee, WI 53201
Part No. 272144
STORAGE
Engines stored over 30 days need special attention.
[1] To prevent gum from forming in fuel system or on
essential carburetor parts:
a) if fuel tank contains oxygenated or reformulated
gasoline (gasoline blended with an alcohol or an
ether), run engine until it stops from lack of fuel, or b) if
fuel tank contains gasoline, either run engine until it
stops from lack of fuel, or add a gasoline additive to the
gas in the tank. (See parts list. Single – use pouches of
gas additive are available from your service dealer.) If
you use a gas additive, run the engine for several
minutes to circulate the additive through the carburetor.
Then, engine and fuel can be stored up to 24 months.
[2] While engine is still warm, change oil.
[3] Remove spark plugs and pour about 1 oz. (30 ml) of
engine oil into each cylinder. Replace spark plugs and
crank slowly to distribute oil.
[4] Clean engine of surface debris, chaff or grass.
[5]
Store in a clean, dry area. Do
not store in same area as a
stove, furnace, water heater, or
other appliance that uses a pilot
light or has a device that can
create a spark.
WARNING
16
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Briggs & Stratton Corporation (B&S), the California Air Resources Board (CARB)
and the United States Environmental Protection Agency (U.S. EPA)
Emission Control System Warranty Statement (Owner’s Defect Warranty Rights and Obligations)
EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE
TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995
AND THEREAFTER, WHICH ARE USED IN CALIFORNIA, AND
TO CERTIFIED MODEL YEAR 1997 AND LATER ENGINES
WHICH ARE PURCHASED AND USED ELSEWHERE IN THE
UNITED STATES.
California and United States Emission Control Defects Warranty Statement
The California Air Resources Board (CARB), U.S. EPA and B&S are
pleased to explain the Emission Control System Warranty on your
model year 2000 and later small off-road engine (SORE). In California,
new small off-road engines must be designed, built and equipped to
meet the State’s stringent anti-smog standards. Elsewhere in the
United States, new non-road, spark-ignition engines certified for model
year 1997 and later, must meet similar standards set forth by the U.S.
EPA. B&S must warrant the emission control system on your engine for
the periods of time listed below, provided there has been no abuse, ne-
glect or improper maintenance of your small off-road engine.
Your emission control system includes parts such as the carburetor,
air cleaner, ignition system, muffler and catalytic converter. Also in-
cluded may be connectors and other emission related assemblies.
Where a warrantable condition exists, B&S will repair your small off-
road engine at no cost to you including diagnosis, parts and labor.
Briggs & Stratton Emission Control Defects Warranty Coverage
Small off-road engines are warranted relative to emission control
parts defects for a period of two years, subject to provisions set forth
below. If any covered part on your engine is defective, the part will be
repaired or replaced by B&S.
Owner’s Warranty Responsibilities
As the small off-road engine owner, you are responsible for the per-
formance of the required maintenance listed in your Operating and
Maintenance Instructions. B&S recommends that you retain all your
receipts covering maintenance on your small off-road engine, but
B&S cannot deny warranty solely for the lack of receipts or for your
failure to ensure the performance of all scheduled maintenance.
As the small off-road engine owner, you should however be aware
that B&S may deny you warranty coverage if your small off-road en-
gine or a part has failed due to abuse, neglect, improper mainte-
nance or unapproved modifications.
You are responsible for presenting your small off-road engine to an
Authorized B&S Service Dealer as soon as a problem exists. The
undisputed warranty repairs should be completed in a reasonable
amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and re-
sponsibilities, you should contact a B&S Service Representative at
1-414-259-5262.
The emission warranty is a defects warranty. Defects are judged on
normal engine performance. The warranty is not related to an in-use
emission test.
Briggs & Stratton Emission Control Defects Warranty Provisions
The following are specific provisions relative to your Emission Control Defects Warranty Coverage. It is in addition to the B&S engine warranty
for non-regulated engines found in the Operating and Maintenance Instructions.
1. Warranted Parts
3. No Charge
Repair or replacement of any Warranted Part will be performed
Coverage under this warranty extends only to the parts listed be-
low (the emission control systems parts) to the extent these
parts were present on the engine purchased.
at no charge to the owner, including diagnostic labor which leads
to the determination that a Warranted Part is defective, if the
diagnostic work is performed at an Authorized B&S Service
Dealer. For emissions warranty service contact your nearest Au-
thorized B&S Service Dealer as listed in the “Yellow Pages” un-
der “Engines, Gasoline,” “Gasoline Engines,” “Lawn Mowers,”
or similar category.
a. Fuel Metering System
•
•
•
Cold start enrichment system
Carburetor and internal parts
Fuel Pump
4. Claims and Coverage Exclusions
b. Air Induction System
Warranty claims shall be filed in accordance with the provisions
of the B&S Engine Warranty Policy. Warranty coverage shall be
excluded for failures of Warranted Parts which are not original
B&S parts or because of abuse, neglect or improper mainte-
nance as set forth in the B&S Engine Warranty Policy. B&S is not
liable to cover failures of Warranted Parts caused by the use of
add-on, non-original, or modified parts.
•
•
Air cleaner
Intake manifold
c. Ignition System
•
•
Spark plug(s)
Magneto ignition system
5. Maintenance
d. Catalyst System
Any Warranted Part which is not scheduled for replacement as re-
quired maintenance or which is scheduled only for regular inspec-
tion to the effect of “repair or replace as necessary” shall be war-
ranted as to defects for the warranty period. Any Warranted Part
which is scheduled for replacement as required maintenance
shall be warranted as to defects only for the period of time up to
the first scheduled replacement for that part. Any replacement
part that is equivalent in performance and durability may be used
in the performance of any maintenance or repairs. The owner is
responsible for the performance of all required maintenance, as
defined in the B&S Operating and Maintenance Instructions.
•
•
•
Catalytic converter
Exhaust manifold
Air injection system or pulse valve
e. Miscellaneous Items Used in Above Systems
•
Vacuum, temperature, position, time sensitive valves
and switches
Connectors and assemblies
•
2. Length of Coverage
B&S warrants to the initial owner and each subsequent purchaser
that the Warranted Parts shall be free from defects in materials
and workmanship which caused the failure of the Warranted
Parts for a period of two years from the date the engine is deliv-
ered to a retail purchaser.
6. Consequential Coverage
Coverage hereunder shall extend to the failure of any engine
components caused by the failure of any Warranted Part still un-
der warranty.
In the USA and Canada, a 24 hour hot line, 1-800-233-3723, has a menu of pre-recorded messages offering you engine maintenance information.
17
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About your engine warranty: (see next page for statement of LIMITED WARRANTY).
Briggs & Stratton welcomes warranty repair and apologizes
to you for being inconvenienced. Any Authorized Service
Dealer may perform warranty repairs. Most warranty repairs
are handled routinely, but sometimes requests for warranty
service may not be appropriate. For example, warranty would
not apply if engine damage occurred because of misuse, lack
of routine maintenance, shipping, handling, warehousing or
improper installation. Similarly, warranty is void if the serial
number of the engine has been removed or the engine has
been altered or modified.
4. Parts which are scored or broken because an engine was
operated with insufficient or contaminated lubricating oil,
or an incorrect grade of lubricating oil (check oil level daily
or after every 8 hours of operation. Refill when necessary
and change at recommended intervals.) OIL GARD
may not shut down running engine. Engine damage may
occur if oil level is not properly maintained. Read Operat-
ing & Maintenance Instructions.
5. Repair or adjustment of associated parts or assemblies
such as clutches, transmissions, remote controls, etc.,
which are not manufactured by Briggs & Stratton.
If a customer differs with the decision of the Service Dealer, an
investigation will be made to determine whether the warranty
applies. Ask the Service Dealer to submit all supporting facts to
his Distributor or the Factory for review. If the Distributor or the
Factory decides that the claim is justified, the customer will be
fully reimbursed for those items that are defective. To avoid
misunderstanding which might occur between the customer
and the Dealer, listed below are some of the causes of engine
failure that the warranty does not cover.
6. Damage or wear to parts caused by dirt, which entered
the engine because of improper air cleaner maintenance,
re-assembly, or use of a non-original air cleaner element
or cartridge. (At recommended intervals, clean and re-oil
the Oil-Foam element or the foam pre-cleaner, and re-
place the cartridge.) Read Operating & Maintenance
Instructions.
7. Parts damaged by overspeeding, or overheating caused
by grass, debris, or dirt, which plugs or clogs the cooling
fins, or flywheel area, or damage caused by operating the
engine in a confined area without sufficient ventilation.
(Clean fins on the cylinder, cylinder head and flywheel at
recommended intervals.) Read Operating & Maintenance
Instructions.
Normal wear:
Engines, like all mechanical devices, need periodic parts ser-
vice and replacement to perform well. Warranty will not cover
repair when normal use has exhausted the life of a part or an
engine.
Improper maintenance:
8. Engine or equipment parts broken by excessive vibration
caused by a loose engine mounting, loose cutter blades,
unbalanced blades or loose or unbalanced impellers, im-
proper attachment of equipment to engine crankshaft,
overspeeding or other abuse in operation.
The life of an engine depends upon the conditions under
which it operates, and the care it receives. Some applications,
such as tillers, pumps and rotary mowers, are very often used
in dusty or dirty conditions, which can cause what appears to
be premature wear. Such wear, when caused by dirt, dust,
spark plug cleaning grit, or other abrasive material that has
entered the engine because of improper maintenance, is not
covered by warranty.
9. A bent or broken crankshaft, caused by striking a solid ob-
ject with the cutter blade of a rotary lawn mower, or exces-
sive v-belt tightness.
10. Routine tune-up or adjustment of the engine.
This warranty covers engine related defective material
and/or workmanship only, and not replacement or refund
of the equipment to which the engine may be mounted.
Nor does the warranty extend to repairs required be-
cause of:
1. PROBLEMS CAUSED BY PARTS THAT ARE NOT
ORIGINAL BRIGGS & STRATTON PARTS.
2. Equipment controls or installations that prevent starting,
cause unsatisfactory engine performance, or shorten en-
gine life. (Contact equipment manufacturer.)
Warranty is available only through service dealers which
have been authorized by Briggs & Stratton Corporation.
Your nearest Authorized Service Dealer is listed in the
“Yellow Pages ” of your telephone directory under “En-
gines, Gasoline” or “Gasoline Engines,” “Lawn Mow-
ers,” or similar category.
3. Leaking carburetors, clogged fuel pipes, sticking valves,
or other damage, caused by using contaminated or stale
fuel. (Use clean, fresh, lead-free gasoline and Briggs &
Stratton gasoline stabilizer, Part No. 5041.)
Briggs & Stratton Engines Are Made Under One Or More Of The Following Patents: Design D-247,177 (Other Patents Pending)
5,852,951
5,823,153
5,819,513
5,765,713
5,645,025
5,642,701
5,606,948
5,548,955
5,546,901
5,503,125
5,501,203
5,497,679
5,320,795
5,271,363
5,269,713
5,265,700
5,243,878
5,235,943
5,197,425
5,197,422
5,191,864
5,188,069
5,186,142
5,138,996
5,105,331
5,086,890
5,070,829
5,058,544
5,040,644
5,040,503
5,009,208
4,996,956
4,995,357
4,977,879
4,971,219
4,895,119
4,875,448
4,819,593
4,719,682
4,694,792
4,684,917
4,633,556
4,630,498
4,522,080
4,520,288
4,453,507
4,430,984
4,355,253
DES. 309,458
DES. 309,457
DES. 308,872
DES. 308,871
In the USA and Canada, a 24 hour hot line, 1-800-233-3723, has a menu of pre-recorded messages offering you engine maintenance information.
18
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BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY
effective July 1, 1999
Replaces all undated Warranties and all Warranties
dated before July 1, 1999
LIMITED WARRANTY
“Briggs & Stratton Corporation will repair or replace, free of charge, any part, or parts of the engine that are defective in
material or workmanship or both. Transportation charges on parts submitted for repair or replacement under this Warranty
must be borne by purchaser. This warranty is effective for the time periods and subject to the conditions provided for in this
policy. For warranty service contact your nearest Authorized Service Dealer as listed in the ‘Yellow Pages ’ under ‘Engines,
Gasoline,’ ‘Gasoline Engines,’ ‘Lawn Mowers’ or similar category. THERE IS NO OTHER EXPRESS WARRANTY. IM-
PLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED
WARRANTIES ARE EXCLUDED. LIABILITY FOR CONSEQUENTIAL DAMAGES UNDER ANY AND ALL WARRANTIES
ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW. Some states do not allow limitations on how
long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential dam-
ages, so the above limitation and 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.”
Briggs & Stratton Corporation
F. P. Stratton, Jr.
Chairman and Chief Executive Officer
WARRANTY PERIOD
WITHIN U.S.A. AND CANADA
OUTSIDE U.S.A. AND CANADA
CONSUMER
COMMERCIAL
CONSUMER
COMMERCIAL
ENGINES
USE*
USE*
USE*
USE*
All Vanguard engines.
2 year – engine
}
All Diamond Plus , Industrial Plus , I/C
engines and sleeve bore Intek series.
2 year
2 year
1 year
2 year
}
1 year
Quantum and Diamond Power .
90 days
{
2
y
e
a
r
{
}
90 days
All standard engines and Kool Bore Intek series
installed on lawn mowers, riders, edgers,
chippers, shredders, tillers, and all Sno/Gard
engines.
2 year
1 year
90 days
90 days
1 year
90 days
90 days
All other standard engines and Classic series.
1 year
*
For purposes of this warranty policy, “consumer use” means personal residential household use by the original retail consumer.
“Commercial use” means all other uses, including use for commercial, income producing or rental purposes. Once an engine
has experienced commercial use, it shall thereafter be considered as a commercial use engine for purposes of this warranty.
Engines used in competitive racing or on commercial or rental tracks are not warrantied.
{
}
One (1) year in Australia, New Zealand, Middle East and Africa.
One (1) year in India.
NO WARRANTY REGISTRATION CARD IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON ENGINES.
YOU MUST SAVE THE PURCHASE RECEIPT. A PROOF OF PURCHASE DATE WILL BE REQUIRED TO OBTAIN WARRANTY.
In the USA and Canada, a 24 hour hot line, 1-800-233-3723, has a menu of pre-recorded messages offering you engine maintenance information.
19
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