Briggs Stratton Lawn Mower 380700 User Manual

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 Owners  
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, SJor 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-  
SERVINGor 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 manufacturers  
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/Ns  
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 engines 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 &  
Strattonare 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  
www.briggsandstratton.com or in the Yellow Pages ”  
directory under Engines, Gasolineor Gasoline  
Engines,or Lawn Mowersor 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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