Briggs Stratton Automobile Parts 310000 User Manual

Operating & Maintenance

Instructions

Model Series

Covered in

This Manual

210000

280000

310000

Model

Type

Code

Month Day

Year

Note: General Model Series numbers noted above are inclusive of the specific mod-

el number found on your engine. To get replacement parts or technical assistance

in the future, write your engine Model, Type, Code and date of purchase here.

TABLE OF CONTENTS

WARNING

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Engine Information . . . . . . . . . . . . . . . . . . . . . . . . 6

Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fuel and Starting Information . . . . . . . . . . . . . . . 8

Starting and Stopping . . . . . . . . . . . . . . . . . . . 9-10

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 11-13

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Parts and Service & Storage . . . . . . . . . . . . 15-16

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.

Need assistance? Go to www.briggsandstratton.com

for detailed information regarding

Briggs & Stratton engines.

Or call, 1-800-233-3723, (U.S.A. and Canada)

to hear a menu of pre-recorded messages

offering engine maintenance information.

PRINTED IN U.S.A.

FORM NO. 275038-6/01

275038

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

Explosion

Moving Parts

DANGER indicates a hazard which, if not

avoided, will result in death or serious injury.

Toxic Fumes

Hot Surface

Kickback

Shock

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.

THE INTERNATIONAL SYMBOLS USED

ON THE ENGINE OR

CAUTION, when used without the alert symbol,

indicates a situation that could result in damage

to the engine.

IN THIS MANUAL INCLUDE:

WARNING

On Off

Fuel

Read Owner’s

Safety Alert

Manual

The engine exhaust from this prod-

uct contains chemicals known to the

State of California to cause cancer,

birth defects, or other reproductive

harm.

Oil

Choke

Stop Fuel Shutoff

* 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.

SAFETY

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.

SAFETY

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

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.

ENGINE PARTS

1. Oil drain

7. Air cleaner

2. Oil fill/Dipstick

3. Rotating screen

4. Blower housing

8. In-line fuel filter (if equipped)

9. Carburetor

10. Oil filter (if equipped)

11. Spark plug wire

5. Muffler/(Muffler guard, if equipped)/

(Spark arrester, if equipped)

12. Engine

Model

xxxxx

Type

xxxx xx

Code

xxxxxxxx

6. 12 V electric starter

MODEL SERIES 210000

GENERAL INFORMATION

ENGINE MODEL

This is a single cylinder, overhead valve (OHV), air-cooled

Bore . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7/16 in. (87.31 mm)

Stroke . . . . . . . . . . . . . . . . . . . . . . . 2-17/64 in. (77.78 mm)

Displacement . . . . . . . . . . . . . . . . 21.00 cu. in. (344.1 cc)

MODEL SERIES 280000

Bore . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7/16 in. (87.31 mm)

Stroke . . . . . . . . . . . . . . . . . . . . . . . . 3-1/16 in. (77.78 mm)

Displacement . . . . . . . . . . . . . . . . 28.42 cu. in. (465.7 cc)

MODEL SERIES 310000

engine. It is a low emissions engine.

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.

Bore . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9/16 in. (90.60 mm)

Stroke . . . . . . . . . . . . . . . . . . . . . . . . 3-1/16 in. (77.78 mm)

Displacement . . . . . . . . . . . . . . . . 30.59 cu. in. (501.2 cc)

Note: 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°.

TUNE-UP SPECIFICATIONS

Armature air gap . . . 0.010 – 0.014 in. (0.25 – 0.36 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 272147 or 274008.

Intake . . . . . . . . . . . . . 0.003 – 0.005 in. (0.08 – 0.13 mm)

Exhaust . . . . . . . . . . . 0.005 – 0.007 in. (0.13 – 0.18 mm)

275038

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

32 40

100

°F

°C

Engine without oil filter holds approximately 1-1/2 quarts

(48 ounces; 1.4 liters). Engine equipped with oil filter holds

approximately 1-3/4 quarts (56 ounces; 1.7 liters).

-20

-10

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 Fill

[3] Replace and tighten dip-

stick. Remove and check

[1] Place engine level and

clean around oil fill area.

[2] Remove dipstick and

wipe clean with cloth.

oil level.

[4] Oil level should be at

FULL line on dipstick.

[5] If needed, add oil slowly -

recheck. Do not over fill.

[6] Replace and tighten dip-

stick.

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] 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 canfills to the

correct level and automatically shuts off, reduc-

ing spills and emissions.

• Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.

• Fill fuel tank outdoors or in well-ventilated area.

• Keep gasoline away from sparks, open flames,

[2] Replace cap before starting.

pilot lights, heat, and other ignition sources.

• If fuel spills, wait until it evaporates before

starting engine.

STARTING

OIL PRESSURE SWITCH

WARNING

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.)

• Do not use pressurized starting fluids.

• Vapors are flammable.

See OIL PRESSURE on page 12 for oil filling instructions.

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.

STARTING AND STOPPING

REWIND (MANUAL) STARTER (auxiliary)

TO START ENGINE

1/4 TURN

Choke/throttle control

Choke

Throttle

[1] Check oil level (see p. 7).

[4] If choke and throttle are on the

same control, move control to

CHOKE or START

[3] If choke and throttle controls are

separate, move choke control to

CHOKE. Move throttle to FAST.

[2] Open fuel shut-off valve

(if equipped) 1/4 turn.

WARNING

[7] Let engine warm up.

If choke equipped:

Slowly adjust toward

RUN position. Wait

until engine runs

smoothly before each

choke adjustment.

[6] Grasp rope handle. Pull slowly until resistance is

felt, then pull rapidly to start engine and avoid

kickback.

[5] Insert key and

turn to RUN.

TO STOP ENGINE

CAUTION: Do not stop

engine by moving choke

control to CHOKE.

Backfire, fire or engine

damage could occur.

1/4 TURN

[2] Close fuel shut-off valve

(if equipped).

[1] With throttle in FAST, turn key to OFF.

Remove key and store out of reach of children.

STARTING AND STOPPING

ELECTRIC (KEY) STARTER (if equipped)

TO START ENGINE

Choke

Throttle

Choke/throttle control

[2] If choke and throttle controls are sepa-

rate, move choke control to CHOKE.

Move throttle to FAST.

[3] If choke and throttle are on the

same control, move control to

CHOKE or START

[1] Check oil level.

CAUTION:

To prolong starter life,

1/4 TURN

[6] Let engine warm up.

If choke equipped:

Slowly adjust toward

RUN position. Wait

until engine runs

smoothly before each

choke adjustment.

use

short

starting

cycles (5 seconds max-

imum, then wait one

minute). Follow equip-

ment manufacturer’s

recommendations for

charging battery.

[4] Open fuel shut-off

valve (if equipped).

[5] Insert key and

turn to START.

TO STOP ENGINE

1/4 TURN

[1] With throttle in FAST, turn key to OFF.

Remove key and store out of reach of children.

[2] Close fuel shut-off valve

(if equipped).

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.

CHANGING OIL

Task

Perform task at hourly

or calendar interval,

whichever comes first.

TO REMOVE

5/16” HEX

Check Oil Level

Change Oil

3/8” SQUARE

7/16” PIPE

Change oil filter

(if equipped)

OIL DRAIN

PLUG

Typical drain

plugs

Service air cleaner

pre-cleaner (if equipped)

4**

[1] Place engine level.

Service air cleaner car-

tridge (if not equipped

with pre-cleaner)

WARNING

[2] Disconnect spark plug

wire and keep away from

spark plug. Disconnect

battery (if equipped with

electric starter) at nega-

tive terminal.

Service air cleaner car-

tridge (if equipped with

pre-cleaner)

4**

Inspect spark arrester

(if equipped)

[3] With engine OFF but still warm remove oil drain

plug and drain oil into appropriate receptacle.

[4] Reinstall drain plug. Remove dipstick.

Replace spark plug

[5] Fill to FULL mark on dipstick with new oil.

Replace in-line fuel filter

(if equipped)

Do not overfill.

Note: Engine without oil filter holds approximately 1-1/2

quarts (48 ounces; 1.4 liters). Engine equipped with filter

holds approximately 1-3/4 quarts (56 ounces; 1.7 liters).

Clean cooling system

Check valve clearance

4**

[6] Replace dipstick.

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.

** 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.

MAINTENANCE

OIL PRESSURE

OIL FILTER (IF EQUIPPED)

Replace oil filter after every 100 hours of operation.

[1] Drain engine oil and remove oil filter.

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.

[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.

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.

[4] Add fresh oil. Fill to FULL line on dipstick.

[5] Start and run engine at idle to check for oil leaks.

[6] Stop engine. Recheck oil level and add oil if required.

AIR CLEANER REMOVAL/ INSTALLATION

AIR CLEANER

All engines have an air cleaner cartridge. In addition, some

engines have a pre-cleaner.

[1] Pull up on air cleaner cover handle, and rotate toward

engine.

[2] Remove air cleaner cover.

CAUTION: Do not use pressurized air or solvents

to clean cartridge. Pressurized air can damage

cartridge; solvents will dissolve cartridge.

[3] Carefully lift air cleaner cartridge and pre-cleaner, if

equipped, from blower housing.

Note: To clean pre-cleaner, wash in soapy water. Squeeze

dry in a clean cloth. DO NOT OIL.

OVAL AIR CLEANER REMOVAL / INSTALLATION

[4] Clean base of air cleaner cartridge area carefully to

prevent debris from entering engine.

[1] Remove cover knob and cover.

[2] Remove cartridge knob.

[5] Place air cleaner pre-cleaner, if equipped, and cartridge

into blower housing. Cartridge must fit securely in base.

[3] Carefully lift air cleaner assembly (pre-cleaner, if

equipped, and cartridge) from base over stud.

[6] Align tabs on cover with slots of blower housing and

replace cover.

[7] Hook handle and close cover.

Note: To clean pre-cleaner (if equipped), separate it from

cartridge and wash soapy water. Squeeze dry in a clean

cloth. Saturate in engine oil. Squeeze in clean, absorbent

cloth to remove all EXCESS oil.

TO OPEN AIR CLEANER COVER

[4] Clean base carefully to prevent debris from entering

carburetor.

[5] Reassemble pre-cleaner on cartridge and place assem-

bly over stud. Air cleaner must fit securely in base.

[6] Tighten cartridge knob securely.

[7] Replace cover and tighten cover knob securely.

COVER

KNOB

PRE-CLEANER

CARTRIDGE

(if equipped)

COVER

CARTRIDGE

KNOB

CARTRIDGE &

PRE-CLEANER

5053

CARTRIDGE

496894

PRE-CLEANER

212403

COVER

STUD

BASE

TABS

SLOTS

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 wire

from the spark plug, 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.

• Do not tamper with governor spring, links or other parts to increase engine speed.

WARNING

MUFFLER

FUEL SYSTEM

WARNING

Replacement parts for the muffler

must be the same and installed in the

same position as the original parts,

otherwise fire can occur.

Replacement parts for fuel system

(cap, hoses, tanks, filters, etc.)

must be the same as original parts,

otherwise fire can occur.

WARNING

If muffler is equipped with spark arrester screen, remove

screen for inspection. Replace screen if damaged or

plugged.

REPLACE FUEL FILTER (if equipped)

Drain fuel tank or close

FUEL FILTER

fuel shut-off valve be-

fore replacing fuel filter.

Otherwise, fuel can leak

out, creating a fire/ex-

plosion hazard.

PART NO. 394358

(WITH FUEL PUMP)

PART NO. 298090 OR 5018

(WITHOUT FUEL PUMP)

SPARK PLUG

Use only Briggs & Stratton Spark Tester (part number

19368) to check for spark.

FUEL HOSE

CLAMPS

AIR COOLING SYSTEM

Debris may clog the en-

gine’s air cooling system.

Remove blower housing

and clean area shown to

prevent overheating and

engine damage.

CLEAN OUT CHAFF AND

DEBRIS

Note: In some areas,

.030” (0.76 mm)

WIRE GAGE

local law requires using

resistor spark plug to

suppress ignition signals.

If this engine was origi-

nally equipped with resis-

tor spark plug, use same

type for replacement.

RESISTOR P/N 491055

CLEANING DEBRIS

Daily or before every use, clean grass, chaff or accumu-

lated debris from engine. Keep linkage, spring and

controls clean. Keep area around and behind muffler free

of any combustible debris.

Engine parts should be kept clean to

WARNING

reduce the risk of overheating and

ignition of accumulated debris. This is

especially important if cutting tall grass.

CAUTION: Do not use water to clean engine parts.

Water could contaminate fuel system. Use a brush

or dry cloth.

CLEAN

Muffler,

Spark Arrester

Linkage, Springs,

Controls

Finger Guard

Rotating Screen

ADJUSTMENTS

TO ADJUST REMOTE CHOKE

CONTROL ADJUSTMENTS

CASING

CLAMP

SCREW

WARNING

[1] Hold choke control to CHOKE or START position.

[2] Loosen casing clamp screw.

[3] Pull casing, wire and choke lever in direction of

arrow to end of travel.

Prevent unintentional starting.

[4] Tighten casing clamp screw.

CARBURETOR ADJUSTMENT

WARNING

Before performing adjustments:

• Remove spark plug wire from spark plug.

• Disconnect battery at negative terminal (only

engines with electric start).

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 equipped with an idle

mixture valve with a limiter (see inset), which allows some

adjustment, and an idle speed adjustment screw.

TO ADJUST CARBURETOR

TO ADJUST REMOTE THROTTLE

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.

CARBURETOR

THROTTLE

LEVER

IDLE MIXTURE

VALVE

WITH LIMITER

HOLE IN

GOVERNOR

CONTROL LEVER

STOP

SWITCH

GOVERNOR

CONTROL PLATE

IDLE

SPEED

SCREW

[1] To adjust idle speed, start engine and warm up

about 5 minutes.

[2] With engine running, place equipment throttle

control in SLOW position.

[3] Rotate carburetor throttle lever against the idle

speed screw and hold it. Turn idle speed screw to

obtain 1750 rpm (use a tachometer).

GOVERNOR CONTROL RACK

CASING CLAMP SCREW

[1] Move remote throttle control to FAST position.

[2] Hole in governor control lever (located just behind

governor control plate) must align with hole in

governor control plate, as illustrated above.

[4] Then rotate idle mixture valve full travel clockwise

and then counterclockwise.

Note: DO NOT remove limiter caps. DO NOT

force beyond limits.

[3] If holes do not line up, loosen casing clamp screw

and then move governor control rack until it does.

[5] Then, position idle mixture valve in middle of travel.

[6] Check idle speed. Re-adjust to 1750 rpm, if needed.

[7] Move throttle control to FAST position. Engine

should accelerate smoothly. If it does not, adjust

idle mixture valve counterclockwise 1/8 turn.

[4] Tighten casing clamp screw.

[5] Check operation of throttle. Move throttle control to

STOP position.

Note: Engines operated at approximately 3000 to 5000 feet

(900 to 1500 meters) above sea level may require a high alti-

tude carburetor nozzle. If erratic performance is observed,

contact a Briggs & Stratton Authorized Service Dealer for cost

to install/purchase a high altitude carburetor nozzle.

[6] Governor control lever must make good contact with

stop switch (if equipped). Readjust if necessary.

SERVICE & STORAGE

An illustrated shop manual includes common specifica-

tions and detailed information covering adjustment, tune-

up and repair of Briggs & Stratton single cylinder, OHV, 4

cycle engines. It is available for purchase from an

Authorized Briggs & Stratton Service Dealer or you can

order it from the factory. Write:

PARTIAL LIST OF GENUINE BRIGGS &

STRATTON PARTS

PART

PART NO.

Air cleaner cartridge

Air cleaner pre-cleaner

Cartridge and pre-cleaner

Oil

496894

212403

Briggs & Stratton Corporation

Attn: Service Division

P. O. Box 1144

5053

Milwaukee, WI 53201

100005 or 100028

491056

Oil filter (3-1/2 in. long)

Oil filter (2-1/4 in. long)

Fuel filter (without filter)

Fuel filter (with filter)

Gas additive

492932

298090 (5018)

394358

5041

Resistor spark plug

491055

Long life platinum spark plug

(used on most OHV engines)

5066

Part No. 272147

for all Models except

28S700 & 311700

Part No. 274008

for Models

28S700 & 311700

Spark plug wrench

Spark tester

89838 (5023)

19368

Oil pump kit

5056

(uses standard electric drill to remove oil from engine quickly)

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

worldwide, including more than 4,000 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

“

”

directory under “Engines, Gasoline” or “Gasoline

Engines,” or “Lawn Mowers” or similar category.

Note: Walking fingers logo and “Yellow Pages” are regis-

tered trademarks in various jurisdictions.

SERVICE & STORAGE

[2] While engine is still warm, change oil.

STORAGE

Engines stored over 30 days need special attention.

[3] Remove spark plug and pour about 1 oz. (30 ml) of

engine oil into cylinder. Replace spark plug and crank

slowly to distribute oil.

[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.

[4] Clean engine of surface debris, chaff or grass.

[5]

Store in a clean, dry area.

WARNING 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.

(

)

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 (AND AFTER JANUARY 1, 2001 IN CANADA).

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.

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.

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.

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 retaqil 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.

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

its 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.

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.

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 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.

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.

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:

Warranty is available only through service dealers which

have been authorized by Briggs & Stratton Corporation.

1. PROBLEMS CAUSED BY PARTS THAT ARE NOT

ORIGINAL BRIGGS & STRATTON PARTS.

You may locate your nearest Authorized Briggs & Stratton

Service Dealer in our dealer locator map at

www.briggsandstratton.com.

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 gasoline stabilizer, Part No. 5041.)

Your nearest Authorized Service Dealer is also listed in

the “Yellow Pages ” of your telephone directory under

“Engines, Gasoline” or “Gasoline Engines,” “Lawn

Mowers,” or similar category.

Briggs & Stratton Engines Are Made Under One Or More Of The Following Patents: Design D-247,177 (Other Patents Pending)

5,894,715

5,823,153

5,819,513

5,813,384

5,809,958

5,765,713

5,645,025

5,642,701

5,606,948

5,606,851

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

5,040,503

5,040,644

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

DES. 309,458

DES. 309,457

DES. 308,871

DES. 308,872

DES. 356,951

DES. 361,771

DES. 375,963

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.

BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY

effective July 1, 2000

Replaces all undated Warranties and all Warranties

dated before July 1, 2000

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, find the nearest Authorized Service Dealer in our dealer locator map at www.briggsandstratton.com or as

listed in the ‘Yellow Pages ’ under ‘Engines, Gasoline,’ ‘Gasoline Engines,’ ‘Lawn Mowers’ or similar category. THERE IS NO

OTHER EXPRESS WARRANTY. IMPLIED 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 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.”

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*

All Vanguard engines.

2 year

2 year }

All Diamond Plus , Industrial Plus , I/C

engines and sleeve bore Intek series.**

2 year

1 year

2 year }

1 year

Quantum and Diamond Power and Kool

Bore Intek series.**

2 year

90 days

2 year {}Z

90 days

All standard engines installed on lawn mowers,

riders, edgers, chippers, shredders, tillers and all

Sno/Gard engines.

2 year

1 year

90 days

1 year

90 days

All other standard engines and Classic series.

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.

Engines used in competitive racing or on commercial or rental tracks are not warranted.

** Touch-N-Mow starter on Quantum and Intek series engines (if equipped). Five (5) year “consumer use” or 90 days

“commercial use.”

*** A two year warranty applies to the emission control system on engines certified by EPA and CARB.

{

}

One (1) year in Australia, New Zealand, Middle East and Africa.

One (1) year in India.

Z One (1) year Kool Bore Intek series, consumer use outside U.S.A. and Canada.

WARRANTY REGISTRATION IS NOT NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON ENGINES.

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 ENGINE WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

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.

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