Briggs & Stratton Engine 210000, 280000, 310000 MS5935 Operating Instructions

							Document: - page 1 (Black)
Screen angle and frequency: 45.0000, 150.0000
Briggs & Stratton Corporation
Milwaukee, Wisconsin 53201
www.briggsandstratton.com
© Copyright 2005 by Briggs & Stratton CorporationFORM NO. MS-5935-8/05
PRINTED IN U.S.A.

	 
  

	 
 	
 	 		

   
 


    

 	

  



     
!	   	 
#$	

%&  %   %


()*+ 
 ,






	







-.////0 -1////0 2.//// 
						

							Document: - page 1 (Black)
Screen angle and frequency: 45.0000, 150.0000

 7
1112
9 8
10
234
6
1
513
14

 










 





  
						

							GB
GB
1
Note: (This note applies only to engines used in the U.S.A.) 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.
ENGINE COMPONENTS
 Fig. 1
1Oil drain
2Oil fill / Dipstick
3Rotating screen
4Air cleaner handle
5Muffler / muffler guard, if equipped 
& Spark arrester, if equipped
612 V electric starter
7Rewind starter handle
8Fuel pump (if equipped)
9In-line fuel filter (if equipped)
10Carburetor or LPG / NG Mixer
11Oil filter (if equipped)
12Air Cleaner cover
13Spark plug wire
14Engine Model Type Code
xxxxxx xxxx xx xxxxxxxx
Record your engine
 Model, Type and Code numbers here for
future use.
Record your date of purchase here for future use.
GENERAL INFORMATION
In the state of California, OHV Model Series 210000, 280000
and 310000 engines are certified by the California Air
Resources Board to meet emissions standards for 250 hours.
Such certification 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.
Model Series 210000
Bore 87.31 mm (3.44 in.). . . . . . . . . . . . . . . . . . . . . . . . . 
Stroke 57.66 mm (2.27 in.). . . . . . . . . . . . . . . . . . . . . . . 
Displacement 344 cc (21.00 cu. in.). . . . . . . . . . . . . . . . . 
Model Series 280000
Bore 87.31 mm (3.44 in.). . . . . . . . . . . . . . . . . . . . . . . . . 
Stroke 77.78 mm (3.06 in.). . . . . . . . . . . . . . . . . . . . . . . 
Displacement 466 cc (28.42 cu. in.). . . . . . . . . . . . . . . . . 
Model Series 310000
Bore 90.60 mm (3.56 in.). . . . . . . . . . . . . . . . . . . . . . . . . 
Stroke 77.78 mm (3.06 in.). . . . . . . . . . . . . . . . . . . . . . . 
Displacement 501 cc (30.59 cu. in.). . . . . . . . . . . . . . . . . 
TUNE-UP SPECIFICATIONS
Armature air gap 0.25 − 0.36 mm . . . . . . . . . . . . . . . . . . 
(0.010 − 0.014 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Spark plug gap  0.76 mm (0.30 in.). . . . . . . . . . . . . . . . . 
Valve clearance with valve springs installed and piston 6 mm past
top dead center (check when engine is cold). See Repair
Manual P/N 272147.
Intake valve clearance  0.08 − 0.13 mm . . . . . . . . . . . . . . 
(0.003 − 0.005 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Exhaust valve clearance  0.13 − 0.18 mm . . . . . . . . . . . . . 
(0.005 − 0.007 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Note: Engine power will decrease 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°.
TECHNICAL INFORMATION
Power Ratings
The power ratings for an individual engine model are initially
developed by starting with SAE (Society of Automotive
Engineers) code J1940 (Small Engine Power & Torque Rating
Procedure) (Revision 2002-05). Given both the wide array of
products on which our engines are placed, and the variety of
environmental issues applicable to operating the equipment, it
may be that the engine you have purchased will not develop
the rated horsepower when used in a piece of power
equipment (actual 
on-site" power). This difference is due to a
variety of factors including, but not limited to, the following:
differences in altitude, temperature, barometric pressure,
humidity, fuel, engine lubrication, maximum governed engine
speed, individual engine to engine variability, design of the
particular piece of power equipment, the manner in which the
engine is operated, engine run-in to reduce friction and clean
out of combustion chambers, adjustments to the valves and
carburetor, and other factors. The power ratings may also be
adjusted based on comparisons to other similar engines
utilized in similar applications, and will therefore not necessari-
ly match the values derived using the foregoing codes.
Hazard Symbols and Meanings
Explosion
To x i c  F u m e sShock
Hot Surface KickbackFire
Moving PartsFrostbite
Wear Eye Protection
International Symbols and Meanings
StopFuel Shutoff Read Operator’s
Manual
Fuel Choke Safety Alert
OilOn Off
SAFETY SPECIFICATIONS
•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.
BEFORE OPERATING
ENGINE
* Briggs & Stratton does not necessarily know what equip-
ment 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.
•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 OPERATING &
MAINTENANCE INSTRUCTIONS
CONTAIN SAFETY
INFORMATION TO:
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.
DANGER indicates a hazard which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazard which, if not avoided,
could result in death or serious injury.
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.
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
WARNING 
						

							GB
2
•Start and run engine outdoors.
•Do not start or run engine in enclosed area, even if
doors or windows are open.WARNING
Engines give off carbon monoxide, an
odorless, colorless, poison gas.
Breathing carbon monoxide can cause
nausea, fainting or death.
WARNING
Starting engine creates sparking.
Sparking can ignite nearby flammable
gases.
Explosion and fire could result.
•If there is natural or LP gas leakage in area, do not
start engine.
•Do not use pressurized starting fluids because
vapors are flammable.
WARNING
WHEN FUELING
•Turn engine OFF and let engine cool at least 2
minutes before removing cap or re-fueling engine.
•Fill fuel tank outdoors or in well-ventilated area.
•On GASOLINE operated engines, do not overfill
fuel tank. Fill tank to approximately 1-1/2 inch below
lowest portion of fill opening to allow for fuel
expansion.
•Keep gasoline away from sparks, open flames, pilot
lights, heat, and other ignition sources.
•Check fuel lines, tank, cap, and fittings frequently
for cracks or leaks. Replace if necessary.
WHEN STARTING ENGINE
•Make sure spark plug, muffler, fuel cap and air
cleaner are in place, and firmly secured by
equipped fasteners.
•Do not crank engine with spark plug, air cleaner
cartridge, or air cleaner cover removed.
•If fuel spills, wait until it evaporates before starting
engine.
•If GASOLINE engine floods, set choke to
OPEN/RUN position, place throttle in FAST and
crank until engine starts.
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
•Transport with fuel tank EMPTY or with fuel shut-off
valve OFF.
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.
Fuel and its vapors are extremely
flammable and explosive.
Fire or explosion can cause severe
burns or death.
WARNING
Gaseous fuels are extremely flammable
and readily form explosive air-vapor mix-
tures at ambient temperatures.
IF YOU SMELL GAS:
•DO NOT start the engine.
•DO NOT actuate any electrical switches.
•DO NOT use the phone in the vicinity.
•Evacuate the area.
•Contact the gas supplier or fire department.
REMEMBER:
•LPG vapor is heavier than air and trends to collect in
low areas. NG vapor is lighter than air and tends to
collect in high areas. Both may travel to remote
locations.
•Keep all flames, sparks, pilot lights, and other
ignition sources away from the area where the
engine is operated or repaired.
•DO NOT smoke when operating or repairing the
engine.
•DO NOT store gasoline or other flammable vapors
or liquids in the vicinity of the engine.
•BEFORE doing any service work to the engine, shut
off the gas supply.
•After initial installation or servicing, check for gas
leaks. DO NOT use an open flame. Apply very
soapy water or leak test solution with a brush and
look for bubbles.
•Keep the equipment and the area surrounding the
engine free of debris.
•Install the fuel system according to applicable
fuel/gas codes.
•Installation, adjustment and repair work should be
done by a qualified technician.
•Flexible supply lines should be checked regularly to
make sure they are in good condition. Replace
damaged or leaking components.
WARNING
Wear eye protection when doing repair
work.
Frostbite can result from skin/eye contact
with leaking LP liquid.
•Operate equipment with guards in place.
•Keep hands and feet away from rotating parts.
•Tie up long hair and remove jewelry.
•Do not wear loose-fitting clothing, dangling
drawstrings or items that could become caught.
WARNING
Rotating parts can contact or entangle
hands, feet, hair, clothing, or accessories.
Traumatic amputation or severe lacera-
tion can result.
•When starting engine, pull cord slowly until
resistance is felt, then pull rapidly.
•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.
WARNING
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
area and cylinder area.
•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.
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.
BEFORE PERFORMING ADJUSTMENTS OR RE-
PA I R S
•Disconnect spark plug wire and keep it away from
spark plug.
•Disconnect battery at negative terminal (only
engines with electric start).
WHEN TESTING FOR SPARK
•Use approved spark plug tester.
•Do not check for spark with spark plug removed.
WARNING
Unintentional sparking can result in fire
or electric shock.
Unintentional start-up can result in en-
tanglement, traumatic amputation, or
laceration. 
						

							GB
3
OIL RECOMMENDATIONS
CAUTION: 
Engine shipped from Briggs & Stratton without oil. Beforestarting engine, fill with oil. Do not over-fill.
Use a high quality detergent oil classified 
For Service SG, SH,
SJ, SL" or higher such as Briggs & Stratton 30, Part Number
100005. Use no special additives with recommended oils. Do
not mix oil with gasoline.
 
°C-30°F-20 020 40 60 80 100
-20 -10 0 10 20 30 40
*
**
32
Choose the SAE viscosity grade of oil from this chart that
matches the starting temperature anticipated before the next
oil change.
*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 of SAE 30 oil below 40° F (4° C) will result in hard
starting and possible engine damage due to inade-
quate lubrication.
Note:Synthetic oil meeting ILSAC GF-2, API
certification mark and API service symbol (shown
at left) with 
SJ/CF ENERGY CONSERVING" or
higher, is an acceptable oil at all temperatures.
Use of synthetic oil does not alter required oil
change intervals.
CHECKING & ADDING OILFig. 2
 (Oil capacity is about 1.4 liter or 48 oz.)
•Check oil level before starting engine.
•DO NOT overfill. Keep level at FULL.
•Check level daily, or after every eight (8) hours of use.
1. Place engine level and keep oil fill area clean. 


2. Remove dipstick , wipe with clean cloth,
3. Replace and tighten down again. Remove dipstick and
check oil level. Oil should be at FULL line on dipstick. 

4. If oil is required, add slowly. 
5. Tighten dipstick firmly before starting engine. 
FUEL RECOMMENDATIONS
Gasoline Powered Engines
Use clean, fresh, lead-free, regular gasoline with a minimum of
85 octane. Leaded gasoline may be used if it is commercially
available and if unleaded is unavailable. Purchase fuel in
quantity that can be used within 30 days. See Storage
instructions.
In U.S.A. leaded gasoline may not be used. Some fuels, called
oxygenated or reformulated gasolines, are gasolines 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.
This engine is certified to operate on gasoline. Exhaust
Emission Control System: EM (Engine Modifications).
Do not use gasoline which contains Methanol. Do not mix oil
with gasoline.
For engine protection, we recommend using Briggs & Stratton
Fuel Stabilizer available from an Authorized Briggs & Stratton
Service Dealer.
Check fuel level
WARNING
Before refueling, allow
engine to cool 2 minutes.
Clean around fuel fill before removing cap to refuel. Fill tank to
approximately 1/2 inch below lowest portion of fill opening to
allow for fuel expansion. Be careful not to overfill.
Natural / Liquid Propane Gas
 Powered Engines
•Use clean, dry fuel, free of moisture or any particulate
material. Using fuels outside the following recom-
mended values may cause performance problems.
•In engines set up to run on LPG, commercial grade
HD5 LPG is recommended. Recommended fuel
composition is fuel with a minimum fuel energy of
2500 BTU’s/ft
3 with maximum propylene content of
5% and butane and heavier gas content of 2.5% and
minimum propane content of 90%.
•NG or LPG engines are certified to operate on natural
or liquid propane gas.
WARNING
The equipment on which this engine is
mounted is equipped with an automatic
safety gas 
fuel lock-off" valve. DO NOT
operate the equipment if the 
fuel lock-off"
valve is missing or inoperative.
•Read the operating instructions supplied by the
equipment manufacturer for information on refueling
natural or LP gas engine.
Re-fueling
STARTING / STOPPING
WARNING
Oil Pressure Switch
If engine is equipped with an oil pressure switch, the switch will
either activate a warning light 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.)
BEFORE STARTING
Start, store, and fuel engine in a level position. Remove
external equipment / engine loads. Check oil level, and use
correct type of oil for starting temperature.
 
STARTING ENGINEFig. 3
Gasoline Powered Engines
1. Open fuel shut-off valve (if equipped). 

2. Move throttle  to FAST. Operate engine with throttle in
FAST.
3. Move choke 
 control lever to CHOKE.
4. If choke and throttle are are on the same control, move
to START or CHOKE position. 

5.ELECTRIC START: Insert key and turn to START. 
CAUTION: To prolong starter life, use short
starting cycles (5 seconds maximum, then wait
one minute.) Follow manufacturer’s recommenda-
tions for charging battery.
6.REWIND START: Insert key and turn to START. 

When starting engine, pull cord slowly until resistance is
felt, then pull rapidly. 
7. Allow engine to warm up. 
IF CHOKE EQUIPPED: Slowly adjust toward RUN
position. Wait until engine runs smoothly before each
choke adjustment.
Natural / Liquid Propane Gas
 Powered Engines
1.ELECTRIC START: Insert key and turn to START. 
CAUTION: To prolong starter life, use short
starting cycles (5 seconds maximum, then wait
one minute.) Follow manufacturer’s recommenda-
tions for charging battery.
2.REWIND START: Insert key and turn to START.
When starting engine, pull cord slowly until resistance
is felt, then pull rapidly. 
3. Allow engine to warm up.
 
STOPPINGFig. 4
Do not stop engine by moving
choke control to CHOKE.
Backfire, fire or engine dam-
age could occur.
WARNING
•With throttle (if equipped) in FAST  position, turn key to
OFF. 

•Remove key and store out of reach of children.
•Close fuel valve.
  
						

							GB
4
MAINTENANCE
WARNING
To prevent accidental starting, remove spark
plug wire and ground it before servicing.
We recommend that you see an authorized Briggs & Stratton
Dealer for all maintenance and service. Use only Briggs &
Stratton parts.
WARNINGDo not strike the flywheel with
hammer or hard object. If
done, the flywheel may shatter during operation.
Do not tamper with governor spring, links or other parts to
increase engine speed.
First 5 hours

Change oil
Every 8 hours or daily

Check oil level

Clean finger guard and around muffler
Every 25 hours or every season

Change oil if operating under heavy load or high
ambient temperature

Service air cleaner pre-cleaner, if equipped*

Replace air cleaner cartridge if no pre-cleaner*
Every 50 hours or every season

Change oil

Clean and inspect spark arrester, if equipped

Clean Extended Life Series

 air cleaner cartridge*
Every 100 hours or every season

Replace air cleaner cartridge, if equipped with
pre-cleaner*

Replace oil filter, if equipped

Replace in-line fuel filter, if equipped

Clean cooling system*

Clean or replace spark plug**
Every 200 hours or every season

Replace Extended Life Series

 air cleaner
cartridge*
Every season

Check valve clearance
*Clean more often under dusty conditions, or when
airborne debris is present or after prolonged opera-
tion cutting tall, dry grass.
**In some areas, local law requires using a resistor
spark plug to suppress ignition signals. If this engine
was originally equipped with resistor spark plug, use
same type of spark plug for replacement.
CHANGING ENGINE OILFig. 5
WARNING
Change oil after first 5 hours of operation. Change oil while
engine is warm. Refill with new oil of recommended SAE
viscosity grade.
1. Place engine level.
2. Disconnect spark plug wire and keep it away from spark
plug.
3. With engine OFF but still warm, remove drain plug 

and drain oil into appropriate receptacle.
4. Reinstall oil drain plug. remove dipstick. 
5. Fill to FULL mark on dipstick with new oil. 
DO NOT OVERFILL 6. Replace dipstick. Check oil level.
OIL FILTER (if equipped)
1. Drain engine oil and remove oil filter.
2. Before installing new filter, lightly oil filter gasket with
fresh, clean engine oil.
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. Recheck oil level and add oil if required.
OIL PRESSURE
If oil pressure drops too low, an oil pressure switch (if engine is
equipped) will either activate a warning light 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.
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.
Note: Oil pressure gauge, if engine is equipped, is supplied by
manufacturer of equipment.
 
AIR CLEANERFig. 6
CAUTION: Do not use pressurized air or solvents to
clean cartridge. Pressurized air can damage cartridge;
solvents will dissolve cartridge.
Extended Life Series
 
Air Filter Cartridge
 
This filter, IF STAMPED ‘WASHABLE’, can be washed with
warm water and mild soap. 
IMPORTANT: Rinse in tap water with SCREEN side up
allowing dirt and debris to filter out.
Leave filter to dry overnight before reinstalling.
Cartridge removal / installation
1. Pull up on air cleaner cover 
 handle, and rotate
towards 
 engine.
2. Remove cover 
.
3. Carefully lift air cleaner cartridge , and pre-cleaner
, if equipped, from blower housing.
4. Clean air cleaner base carefully to prevent debris from
falling into carburetor.5. Place new pre-cleaner, if equipped, and cartridge firmly
in base.
6. Align tabs 
	 on cover with slots 
 of blower housing
and replace cover.
7. Hook handle and close cover.
 
HIGH FLOW AIR CLEANER −
CYLINDER FILTERFig. 7
This filter 
 is made of cotton, which is different from a
standard paper filter, it MUST be oiled.
1. Spray the filter with air filter cleaning solution. Allow filter
to soak in solution for 15 minutes.
CAUTION: Never use detergents, high pres-
sure water, or gasoline to clean this filter.
2. Rinse the filter with warm water. Let the water run from
clean side to the dirty side.
3. Allow filter to dry completely. It is best to allow the filter to
dry naturally. Do not use heat, this may shrink the cotton.
4. USE ONLY AIR FILTER OIL, such as the oil included in
the cleaning kit (P/N 5089D), to re-oil the filter.
WARNING
Never use motor oil, transmission fluid, WD40, or
other oils. Failure to follow instructions can cause
fires resulting in death or serious injury. Use only
air filter oil designed specifically for air filters.
5. Pour or spray a small amount on each pleat. Allow the oil
to soak into the filter for 20 minutes. The filter is correctly
oiled when the cotton changes to the color of the oil.
CAUTION: DO NOT over-oil air filter, it will
interfere with engine performance and may cause
engine damage. If the filter is placed on cardboard
for 10 minutes and leaves a stain, it is over oiled.
Wash/clean and re-oil per above instructions.
6. Re-install air filter.
SPARK PLUG



Check the spark plug every season. Replace the spark plug if
upon inspection the electrodes are burned or worn. Ensure the
spark plug is clean. Check the gap with a feeler gage 

 and
reset to .76 mm or 0.30 in. 
 if necessary. 
CLEANING DEBRISFig. 8
Daily or before every use, clean accumulated debris from
engine.
 Keep linkage, springs and controls clean. Keep
area around and behind the muffler free of any combustible
debris.

CAUTION: Do not use water to clean engine parts. Water
could contaminate fuel system. Use a brush or dry cloth.
WARNING
Engine parts should be kept clean to reduce the risk of
overheating and ignition of accumulated debris.
MUFFLER
WARNING
Replacement parts for the muffler must be the same and
installed in the same position as the original parts, otherwise
fire can occur.
If muffler is equipped with spark arrester screen, remove
screen for inspection. Replace screen if damaged or plugged
with debris.
FUEL SYSTEM / IN-LINE FUEL FILTER
WARNING
Replacement parts for fuel system (caps, hoses, tanks, filters,
etc.) must be the same as the original parts otherwise fire can
occur.
Fuel Filter − Drain fuel tank or close fuel shut-off valve before
replacing fuel filter, otherwise fuel can leak out, creating a
potential hazard. 
						

							GB
5
 
AIR COOLING SYSTEM
Fig. 9
It is recommended to clean the air cooling system with blower
housing removed every 100 hours. Clean areas shown.

STORAGE
Engines stored over 30 days need to be protected or drained of
fuel to prevent gum from forming in fuel system or on essential
carburetor parts.
For engine protection, we recommend use of Briggs & Stratton
Fuel Stabilizer available from an Authorized Briggs & Stratton
Service Dealer. Mix stabilizer with fuel in fuel tank or storage
container. Run engine for a short time to circulate stabilizer
through carburetor. Engine and fuel can be stored up to 24
months.
Note: If stabilizer is not used or if engine is operating on
gasoline containing alcohol, e.g. gasohol, remove all fuel from
tank and run engine until it stops from lack of fuel.
1. Change oil.
2. Remove spark plug and pour about 30 ml (1 oz) of
engine oil into cylinder. Replace spark plug and crank
slowly to distribute oil.
3. Clean grass and chaff from cylinder and cylinder head
fins, under finger guard and behind muffler.
4. Store in a clean and dry area, but NOT near a stove,
furnace or water heater which uses a pilot light or any
device that can create a spark.
SERVICE
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.
When you purchase equipment powered by a
Briggs & Stratton engine, you are assured of
highly skilled, reliable service at more than
30,000 Authorized Service Dealers world-
wide, including more than 6,000 Master
Service Technicians. Look for these signs
wherever Briggs & Stratton service is offered.
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, Gasoline"
or 
Gasoline Engines," or 
Lawn Mowers" or
similar category.
™
Note: Walking fingers logo and 
Yellow Pages" are registered
trademarks in various jurisdictions.
An illustrated shop manual includes 
Theories of Operation,"
common specifications and detailed information covering
adjustment, tune-up and repair of Briggs & Stratton single
cylinder, OHV, 4 cycle engines. Order the shop manual from an
Authorized Briggs & Stratton Service Dealer. Order P/N
272147 for all models.
Insist on Genuine Briggs & Stratton replacement parts with our
logo on the box and/or part. Non-original parts may not perform
as well and may void your warranty.
PARTIAL LIST OF GENUINE 
BRIGGS & STRATTON PARTS
Models 280000, 310000 AVS
 SeriesExtended Life Series
 flat air cleaner cartridge
(washable, no pre-cleaner required)
697153 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Extended Life Series
 Maintenance Kit 5128. . . . . . . . 
(Includes oil, A/C filter, spark plug, gas additive)
Flat air cleaner cartridge and pre-cleaner kit  5077. . . . . . 
Flat air cleaner cartridge  698083. . . . . . . . . . . . . . . . . . . 
Flat air cleaner pre-cleaner 697015. . . . . . . . . . . . . . . . . . 
Maintenance Kit 5127. . . . . . . . . . . . . . . . . . . . . . . . . . 
(Includes oil, A/C filter, spark plug, gas additive)
UL approved Flat air cleaner cartridge  790263. . . . . . . . . 
(For NG/LPG Gaseous Fuel engines only.)
Model 210000 AVS

 SeriesFlat air cleaner cartridge and pre-cleaner kit  5079. . . . . . 
Flat air cleaner cartridge  698413. . . . . . . . . . . . . . . . . . . 
Flat air cleaner pre-cleaner 697292. . . . . . . . . . . . . . . . . . 
Maintenance Kit 5126. . . . . . . . . . . . . . . . . . . . . . . . . . 
(Includes oil, A/C filter, spark plug, gas additive)
Oval air cleaner cartridge and pre-cleaner kit 5053. . . . . . 
Oval air cleaner cartridge 496894. . . . . . . . . . . . . . . . . . . 
Oval air cleaner pre-cleaner 272403. . . . . . . . . . . . . . . . . 
High Flow Air Filter (cylinder) 698973. . . . . . . . . . . . . . . . 
High Flow Air Filter Cleaning Kit 5089D. . . . . . . . . . . . . . 
Synthetic Oil (32 oz.) 100074. . . . . . . . . . . . . . . . . . . . . . 
Oil (20 oz.) 100005. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Oil (48 oz.) 100028. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Oil filter (6 cm long) 492932 -or- 5049. . . . . . . . . . . . . . . . 
Oil filter (8.5 cm long) 491056. . . . . . . . . . . . . . . . . . . . . . 
Fuel stabilizer (30 ml, single use pouch) 992030. . . . . . . . 
Fuel stabilizer (125 ml)  999005E -or- 5041. . . . . . . . . . . . 
Fuel filter (without fuel pump) 298090 -or- 5018. . . . . . . . . 
Extended Life Series
 Fuel filter 
(for engines with fuel pump) 695666 -or- 5070. . . . . . . . . . 
Fuel filter (for engines with fuel pump) 394358. . . . . . . . . . 
Resistor spark plug 491055. . . . . . . . . . . . . . . . . . . . . . . 
Long life platinum spark plug
(used on most OHV engines) 5066. . . . . . . . . . . . . . . . . 
Spark tester 19368. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Spark plug wrench 89838 -or- 5023. . . . . . . . . . . . . . . . . . 
Oil pump kit (uses standard electric drill to
remove oil from engine quickly) 5056. . . . . . . . . . . . . . . .  
						

							GB
6
BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY
Effective July 1, 2004 replaces all undated Warranties and all Warranties dated before July 1, 2004
LIMITED WARRANTYBriggs & Stratton Corporation will repair or replace, free of charge, any part(s) of the engine that is defective in material or workmanship or both. Transporta-
tion 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 stated below. For warranty service, find the nearest Authorized Service Dealer in our dealer locator map at
www.briggsandstratton.com
, or by calling 1-800-233-3723, or as listed in the ‘Yellow Pages™’. 
THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICU-
LAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED WARRANTIES
ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY
LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states or countries do not allow the exclusion or
limitation of incidental or consequential damages, 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 and country to country.
Vanguard

ELS

I/C

Industrial Plus

Intek

   (Sleeve Bore)Fource

Intek

   (Kool Bore)
Power Built
 OHV
Quantum

Quattro

Q45

Sprint
Classic

Commercial Use2 years
90 days1 year
Consumer Use
2 years 2 years
90 days1 year
OUR PRODUCT
WARRANTY PERIOD*
Etek

1 year
* Note the following special warranty periods: 2 years for Classic™ engines in the European Union and Eastern European countries, for all consumer products in the European Union, and
for emission control systems on engines certified by EPA and CARB. 5 years for consumer use, 90 days for commercial use of Touch-N-Mow® starter on Quantum® and Intek™ engines.
Engines used in competitive racing or on commercial or rental tracks are not warrantied.
The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the table above. “Consumer use”
means personal residential household use by a 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.
NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASE RECEIPT. IF
YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THE MANUFACTURING DATE OF THE
PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.
ABOUT YOUR ENGINE 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 han-
dled 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.
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 mis-
understanding 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.
Normal wear:
Engines, like all mechanical devices, need periodic parts service
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:
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 cleaninggrit, or other abrasive material that has entered the engine be-
cause of improper maintenance, is not covered by warranty.
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 because 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.)
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 Fuel Stabilizer, Part No. 5041.)
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.
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-oilthe Oil-Foam
 element or the foam pre-cleaner, and
replace the cartridge.) Read Operating & Maintenance
Instructions.
7. Parts damaged by over-speeding, 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.
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,
over-speeding or other abuse in operation.
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.
11. Engine or engine component failure, i.e., combustion
chamber, valves, valve seats, valve guides, or burned
starter motor windings, caused by the use of alternate
fuels such as, liquified petroleum, natural gas, altered
gasolines, etc.
Warranty is available only through service dealers which
have been authorized by Briggs & Stratton Corporation.
your nearest Authorized Service Dealer is listed in the 
Yel-
low Pages™" of your telephone directory under 
Engines,
Gasoline" or 
Gasoline Engines," 
Lawn Mowers," or simi-
lar category.
Briggs & Stratton Engines Are Made Under One Or More Of The Following Patents: Design D-247,177 (Other Patents Pending)
6,691,683
6,647,942
6,622,683
6,615,787
6,617,725
6,603,227
6,595,897
6,595,176
6,584,964
6,557,833
6,542,0746,520,141
6,495,267
6,494,175
6,472,790
6,460,502
6,456,515
6,382,166
6,369,532
6,356,003
6,349,688
6,347,6146,325,036
6,311,663
6,284,123
6,263,852
6,260,529
6,242,828
6,239,709
6,237,555
6,230,678
6,213,083
6,202,6166,145,487
6,142,257
6,135,426
6,116,212
6,105,548
6,347,614
6,082,323
6,077,063
6,064,027
6,040,767
6,014,8086,012,420
5,992,367
5,904,124
5,894,715
5,887,678
5,852,951
5,843,345
5,823,153
5,819,513
5,813,384
5,809,9585,803,035
5,765,713
5,732,555
5,645,025
5,642,701
5,628352
5,619,845
5,606,948
5,606,851
5,605,130
5,497,6795,548,955
5,546,901
5,445,014
5,503,125
5,501,203
5,497,679
5,320,795
5,301,643
5,271,363
5,269,713
5,265,7005,243,878
5,235,943
5,234,038
5,228,487
5,197,426
5,197,425
5,197,422
5,191,864
5,188,069
5,186,142
5,150,6745,138,996
5,086,890
5,070,829
5,058,544
5,040,644
5,009,208
4,996,956
4,977,879
4,977,877
4,971,219
4,895,1194,875,448
4,819,593
4,720,638
4,719,682
4,633,556
4,630,498
4,522,080
4,520,288
4,512,499
4,453,507
4,430,984D 476,629
D 457,891
D 368,187
D 375,963
D 309,457
D 372,871
D 361,771
D 356,951
D 309,457
D 308,872
D 308,871 
						

							Fig. 5
Fig. 6
Fig. 7







 
 

	

Fig. 8Fig. 9



 
						

							
	





	
		

	
	







			
		
		 !!

	 	

	 	
		#$%&	

	 	
#
	




 !




#

#$#%
	

&
(#%
%
	
#

)**+
#

	


,
#



-	

%#	

(





(%.%	
	


#

/001

##

#


 !#(

#

#
	


#


(2







	
#
#

#%
	

3
#
#





	
#


#
2


#



#

%

#


$

(


!(
#%
	
%
		


	
		
	&	

	 


#%
	

(

2

#


(

4
2

(2


	


2

(






!
#$%

	 	

#%
	
(






#


,
#
%


&
	5

!
##




2
	#

#%
	

!
(


.






#


#



#%
	
(
(
2

(
!#
(
2
	
#%
	





	
#
#


2
#
3





	#%
	
6
!
2
7



#



(

#




##



8*

2
,

		(	


!

2



2
/%9/9%):0%:)+)


#(

(7


4	
#
	

#


(

%

#


	
		
	&	

	 

(	

2
2
#7

$2
	

!
	
(%
	

	

&
	5



/ $
 
2
	

(




(


#
#





(





	


 ;
5

	
#
•
#

#
•



•;
 #
•;



	#

 
#
•


•.
#
 	
#
•.	

•5	
	
#
 
#
•2


•#
•4

# 
22


 5


#
•	




#
$
 (

#
	

(
	
	
(



#$
 

2

	%
(.
#
6
!
2
7

;
#(
2



6
!
2
7



?3
( 	
@
?	
A%

@?A
	
@?=(5(
@#
	
9 #2
	

$#


(
2
!	
$ %
$2
	




$
 (
	!





	
#
#



!	
$%
 !

2

$
 



%
%	#

: 5


$
 (



#

,
#

(



	



?




@
(%




(
$
 (



%
#

,
#


(




#






#


#

,2

#


#



#
#



(

%




#

,
#




!&
	5
%


+ 
,
2
	

2
	








	
#





$
 
(

	

	


		



#






)###
		
#7
 


		!
#.
#2


#

#


	

(

#

	



#
	#
(

	




###	
#


(
&
	
!5


(	
	


B

 	




##/):
	
	#



 	




##):*
	
	#


 	




##:**
	
	#

;
#
(.%
(#(

)*):





	

	
(

	(
,
/*/)



#


	

2

2

#

	
#
(






	
#
	#


#


!	#$%%%#
&	(&	(
	
C/)***
		!
	
(


#




2#
 
	

  
)
#; 
)


	


##
 




##



#

	(

	


(#

;


#
,
#
;
	


)):
#

	D/):D):*D:**;
	
)):#

	D):*D:**D/***


#
5


)/****899)E****
	
9+:8/****
	
:*/