Briggs Stratton 420000 User Manual

Operating & Maintenance

Instructions

Model Series

Covered in

This Manual

420000

460000

Model

Type

Code

Note: General Model Series number noted above is inclusive of the specific model

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.

Month Day Year

TABLE OF CONTENTS

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

WARNING

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.

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

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. 274796-5/03

274796

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

Manual

Safety Alert

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

Starting engine creates sparking.

Gasoline and its vapors are extremely

flammable and explosive.

Sparking can ignite nearby flammable

gases.

Fire or explosion can cause severe burns

or death.

Explosion and fire could result.

WHEN ADDING FUEL

• Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.

• If there is natural or LP gas leakage in area, do not

start engine.

• Do not use pressurized starting fluids because

vapors are flammable.

• 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.

• 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.

WARNING

Rapid retraction of starter cord (kickback) will

pull hand and arm toward engine faster than

you can let go.

WHEN STARTING ENGINE

• Make sure spark plug, muffler, fuel cap and air

cleaner are in place.

Broken bones, fractures, bruises or sprains

could result.

• Do not crank engine with spark plug removed.

• If fuel spills, wait until it evaporates before starting

engine.

• When starting engine, pull cord slowly until

resistance is felt, then pull rapidly.

• If engine floods, set choke to OPEN/RUN position,

place throttle in FAST and crank until engine starts.

• 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.

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

WARNING

valve OFF.

Rotating parts can contact or entangle

hands, feet, hair, clothing, or accessories.

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.

Traumatic amputation or severe laceration

can result.

• 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.

SAFETY

WARNING

Engines give off carbon monoxide, an

odorless, colorless, poison gas.

Unintentional sparking can result in fire or

electric shock.

Breathing carbon monoxide can cause

nausea, fainting or death.

Unintentional start-up can result in en-

tanglement, traumatic amputation, or lac-

eration.

• Start and run engine outdoors.

• Do not start or run engine in enclosed area, even if

doors or windows are open.

BEFORE PERFORMING ADJUSTMENTS OR

REPAIRS

• Disconnect spark plug wire and keep it away from

spark plug.

WARNING

Running engines produce heat. Engine

parts, especially muffler, become extremely

hot.

• Disconnect battery at negative terminal (only

engines with electric start).

Severe thermal burns can occur on contact.

WHEN TESTING FOR SPARK

• Use approved spark plug tester.

Combustible debris, such as leaves, grass,

brush, etc. can catch fire.

• Do not check for spark with spark plug removed.

• 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.

ENGINE INFORMATION

TECHNICAL INFORMATION

POWER RATINGS: The power ratings for an individual engine

model are initially developed by starting with SAE (Society of Auto-

motive 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 en-

vironmental 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, tempera-

ture, barometric pressure, humidity, fuel, engine lubrication, maxi-

mum governed engine speed, individual engine to engine variabil-

ity, 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 necessarily match the

values derived using the foregoing codes.

ENGINE INFORMATION

1. Spark plug wire

2. Carburetor

3. Air cleaner

6. Oil drain plug

7. Crankshaft

8. 12V electric starter

9. Fuel filter

10. Oil fill/Dipstick

11. Blower housing

4. Rotating screen

5. Emission label and Engine

Model

xxxxxx

Type

xxxx xx

Code

xxxxxxxx

label

GENERAL INFORMATION

ENGINE MODEL

This is a twin cylinder, L-head, air-cooled engine. It is a low

emissions engine.

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 271172.

In the state of California, the 420000 and 460000 series

engines covered in this manual are certified by the

California Air Resources Board to meet emissions stan-

dards for 125 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.

Intake . . . . . . . . . . . . . 0.006 – 0.008 in. (0.15 – 0.20 mm)

Exhaust . . . . . . . . . . . 0.009 – 0.011 in. (0.23 – 0.28 mm)

Note: For practical operation, the horsepower loading

should not exceed 85% of rated horsepower. 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). It will operate satisfactorily at an angle up to 15°.

MODEL SERIES 420000

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

Stroke . . . . . . . . . . . . . . . . . . . . . . . . 2-9/32 in. (57.94 mm)

Displacement . . . . . . . . . . . . . . . . 42.33 cu. in. (694.0 cc)

MODEL SERIES 460000

Bore . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9/16 in. (90.49 mm)

Stroke . . . . . . . . . . . . . . . . . . . . . . . . 2-9/32 in. (57.94 mm)

Displacement . . . . . . . . . . . . . . . . 45.48 cu. in. (745.2 cc)

274796

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

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

(48 ounces; 1.4 liter).

-20

-30

32 40

100

°F

°C

-20

-10

STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

Engine equipped with oil filter holds approximately

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

CAUTION: Use 5W-30 oil or synthetic oil if anticipated

temperatures are below 40° F (4° C) to prevent

internal engine damage at startup due to inadequate

lubrication. Air cooled engines run hotter than

automotive engines. The use of non-synthetic

multi-viscosity oils, e.g. 5W-30, 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.

TYPE OF OIL TO USE

• 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.

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.

** 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.

CHECKING AND ADDING OIL

• Check oil level before starting the engine.

• Keep oil level at FULL.

• Do not overfill.

• Check level daily, or after every eight (8) hours.

Dipstick

FULL

Oil Fill

[2] Remove dipstick and wipe clean with cloth.

[1] Place engine level. Clean

around oil fill and dipstick.

[3] Then push dipstick back in and remove to check oil level.

FULL

[4] Remove dipstick. Pour oil

slowly.

[5] Fill to FULL line on dipstick

– recheck.

[6] Replace dipstick firmly.

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 77 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,

pilot lights, heat, and other ignition sources.

[2] Replace cap before starting.

• 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 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.)

• 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

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).

[5] Grasp rope handle. Pull slowly

until resistance is felt, then pull

rapidly to start engine and avoid

kickback.

WARNING

[6] 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.

Rewind starter

Rope starter

TO STOP ENGINE

CAUTION:

[1] Move throttle

(if equipped)

Do not stop engine

by moving choke

control to CHOKE.

Backfire, fire or en-

SLOW, then to STOP.

[2] Close fuel shut-off

valve

gine

damage

could occur.

(if equipped).

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.

[1] Check oil level.

[3] Move choke control to CHOKE or

START.

[6] Let engine warm up. Choke

Equipped: Move choke

control lever toward RUN a

short distance at a time over

several seconds in warm

weather or minutes in cold

weather. Let engine run

CAUTION:

To prolong starter life,

use short starting cycles

(5 seconds maximum,

then wait one minute).

equipment

manufacturer’s recom-

mendations for charging

battery.

smoothly

before

each

[5] Insert key and turn to

START.

change. Operate with choke

in RUN.

TO STOP ENGINE

[2] Turn key to OFF.

Remove key and

store out of reach of

children.

[3] Close fuel shut-off

valve (if equipped).

[1] Move throttle

(if equipped) to SLOW.

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.

PIPE

Check oil Level

Change oil

Typical

drain

plug

Change oil filter

(if equipped)

Service air cleaner

pre-cleaner (if equipped)

OIL DRAIN PLUG

4**

Service air cleaner car-

tridge (if not equipped

with pre-cleaner)

[1] Place engine level.

[2] Disconnect spark plug

WARNING

wires and keep away

from spark plugs. Dis-

connect battery (if equip-

ped with electric starter)

at negative 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.

Clean or replace

spark plugs

[4] Reinstall drain plug. Remove dipstick.

Replace in-line fuel filter

(if equipped)

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

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

4**

Clean combustion

chamber

[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.

FULL

** 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

AIR CLEANER

CHANGING OIL FILTER (IF EQUIPPED)

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

some engines have a pre-cleaner.

Change oil filter after every 100 hours.

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.

OIL FILTER P/N

SEE PAGE 16

CAUTION: Do not use pressurized air or solvents to

clean cartridge. Pressurized air can damage

cartridge; solvents will dissolve cartridge.

1/2-3/4

TURN

REMOVING/INSTALLING AIR CLEANER w/o TANK

[1] Drain engine oil and remove oil filter.

KNOBS

COVER

[2] Before installing new filter, lightly oil filter gasket

with fresh, clean oil.

[3] Screw filter on by hand until gasket contacts oil

filter adapter. Tighten 1/2 to 3/4 turn more.

WING UNTS

PRE-CLEANER

and

CARTRIDGE

PART NO. 5052

CARBURETOR

PLATE

[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.

CARTRIDGE

PART NO. 394019

PRE-CLEANER

PART NO. 272490

CARBURETOR

SHIELD

OIL PRESSURE

Normal warm operating oil pressure for a pressure lube

engine (engine with oil filter) is 10 to 50 psi at normal

operating temperature. If pressure drops below normal

range, stop engine and check oil level with dipstick. If oil

level is between ADD and FULL mark on dipstick, Do not

restart engine. Contact an Authorized Briggs & Stratton

Service Dealer. Do not operate engine until oil pressure is

corrected.

BODY

Dual element air cleaner

[1] Remove knobs and cover.

[2] Slide pre-cleaner off cartridge.

[3] Remove wing nuts, and cartridge plate. Carefully

remove cartridge to prevent debris from entering

carburetor.

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.

[4] Reinstall cartridge and cartridge plate. Tighten wing

nuts securely.

Note: Oil pressure gauge, if engine is equipped, is supplied

by manufacturer of equipment.

[5] Reassemble pre-cleaner on cartridge.

[6] Replace cover and tighten knobs securely.

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.

WARNING

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

MUFFLER

Replacement parts for the

muffler must be the same and

installed in the same position

as the original parts, other-

wise fire can occur.

SPARK PLUG

Use only Briggs & Stratton Spark Tester (part number

19368) to check for spark.

WARNING

.030” (0.76 mm)

WIRE GAGE

Note: In some areas, local

law requires using resistor

If muffler is equipped with spark

spark plug to suppress igni-

tion signals. If this engine

was originally equipped with

resistor spark plug, use

arrestor

screen,

remove

screen for inspection. Replace screen if damaged or plugged.

same type for replacement.

RESISTOR P/N 802592

FUEL SYSTEM

Replacement parts for fuel

system (cap, hoses, tanks,

WARNING

AIR COOLING SYSTEM

filters, etc.) must be the same

as original parts, otherwise

fire can occur.

Debris may clog

the engine’s air

cooling system.

Remove blower

housing

and

clean area shown

to prevent over-

heating and en-

gine damage.

FUEL FILTER (if equipped)

FILTER

PART NO. 394358

(WITH FUEL PUMP)

PART NO. 298090 or 5018

(WITHOUT FUEL PUMP)

CLEAN AREAS OF

ALL DIRT AND DEBRIS

[1] Disconnect spark plug

wires and keep away

from spark plugs.

WARNING

[2] Drain fuel tank or close

fuel shut-off valve before

replacing

fuel

filter.

Otherwise, fuel can leak

out, creating a fire/explo-

sion hazard.

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

DEBRIS

GUARD

ROTATING

SCREEN

ARRESTER

(IF EQUIPPED)

CLEAN

Muffler and Spark Arrester

Debris Guard or Rotating Screen

ADJUSTMENTS

TO ADJUST REMOTE CHOKE CONTROL

CONTROL ADJUSTMENTS

WARNING

CHOKE

CLOSED

CHOKE

LEVER

CASING

CLAMP

SCREW

Prevent unintentional starting.

Before performing adjustments:

• Remove spark plug wire from spark plug.

• Disconnect battery at negative terminal (only

engines with electric start).

[1] Remove air cleaner.

[2] Move choke control to CHOKE or START position.

(Carburetor choke should be completely closed.)

[3] If not, loosen casing clamp screw.

[4] Then move casing, wire and engine choke lever

until choke is completely closed.

[5] Tighten casing clamp screw. Replace air cleaner.

ADJUSTMENTS

TO ADJUST REMOTE THROTTLE CONTROL

TO ADJUST CARBURETOR

IDLE

SPEED

SCREW

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

NON-ADJUSTABLE

IDLE MIXTURE JET

[1] Start engine and warm up approximately 5 minutes

before adjusting.

[2] With engine running, place throttle control in SLOW

position.

CASING

CLAMP

SCREW

SWIVEL

[3] Rotate carburetor throttle lever against the idle

speed screw and hold it.

[4] Turn idle speed screw to obtain 1500 to 1600 rpm.

Note: Governed idle has been set to 1750 rpm at factory.

QUARTER CIRCLE

CASING

CLAMP

SCREW

[1] Remove air cleaner.

[2] Move throttle control to FAST. (Swivel should be

against side of quarter circle.)

[3] If not, loosen casing clamp screw. Move casing

and wire in direction shown by arrow until swivel is

against side of quarter circle.

[4] 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 air

cleaner cover must be assembled to carburetor before

starting engine.

The carburetor on this engine is low emission. It is

equipped with an idle speed adjustment screw and a

non-adjustable idle mixture valve.

Note: Engines operated at approximately 3000 to 5000 feet

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

tude carburetor 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.

SERVICE & STORAGE

PARTIAL LIST OF GENUINE BRIGGS & STRATTON PARTS

BRIGGS & STRATTON

SERVICE

PART

Air cleaner cartridge

Air cleaner pre-cleaner

PART NO. (or equivalent)

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.

394019

272490

5052

100005 or 100028

491056

Air cleaner pre-cleaner and cartridge

Oil

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

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

Fuel filter (with fuel pump)

Fuel filter (without fuel pump)

Gas additive

Resistor spark plug

When you purchase equipment powered by a

Briggs & Stratton engine, you are assured of

highly skilled, reliable service at more than

492932 or 5049

394358

298090 or 5018

5041

30,000

Authorized

Service

Dealers

worldwide, including more than 5,000 Master

Service Technicians. Look for these signs

wherever Briggs & Stratton service is offered.

802592

Long life platinum spark plug

5062

(used on most L-head engines)

You may locate your nearest Authorized Briggs & Stratton

Service Dealer in our dealer locator map on our web site

Spark plug wrench

Spark tester

Oil pump kit

89838 or 5023

19368

m or in the “Yellow Pages”

directory under “Engines, Gasoline” or “Gasoline

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

5056

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

An illustrated shop manual includes com-

mon specifications and detailed informa-

tion covering adjustment, tune-up and

repair of Briggs & Stratton L-head, 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

Corporation, Attn: Service Division

Part No. 271172

P. O. Box 1144, Milwaukee, WI 53201

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

LIMITED WARRANTY

Briggs & Stratton Corporation will repair or replace, free of charge, any part(s) of the engine that is 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 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

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 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.

(Kool Bore)

(Sleeve Bore)

Consumer Use

2 years

1 year

2 years

90 days

1 year

90 days

2 years

1 year

Commercial Use

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 pur-

poses 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.

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EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 AND THERE-

AFTER, 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).

The California Air Resources Board (CARB), U.S. Elsewhere in the United States, new non-road, Your emission control system includes parts

EPA and B&S are pleased to explain the Emission spark-ignition engines certified for model year such as the carburetor, air cleaner, ignition sys-

Control System Warranty on your model year 1997 and later must meet similar standards set tem, muffler and catalytic converter. Also in-

2002 and later small off-road engine (SORE). In forth by the U.S. EPA. B&S must warrant the emis- cluded may be connectors and other emission

California, new small off-road engines must be de- sion control system on your engine for the periods related assemblies.

signed, built and equipped to meet the State’s of time listed below, provided there has been no

Where a warrantable condition exists, B&S will

repair your small off-road engine at no cost to

you including diagnosis, parts and labor.

stringent anti-smog standards.

abuse, neglect or improper maintenance of your

small off-road engine.

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.

As the small off-road engine owner, you are re- As the small off-road engine owner, you should The undisputed warranty repairs should be

sponsible for the performance of the required however be aware that B&S may deny you war- completed in a reasonable amount of time, not

maintenance listed in your Operating and Main- ranty coverage if your small off-road engine or a to exceed 30 days.

tenance Instructions. B&S recommends that part has failed due to abuse, neglect, improper

you retain all your receipts covering mainte- maintenance or unapproved modifications.

If you have any questions regarding your war-

ranty rights and responsibilities, you should con-

nance on your small off-road engine, but B&S

You are responsible for presenting your small

tact

B&S Service Representative at

cannot deny warranty solely for the lack of re-

off-road engine to an Authorized B&S Service

1-414-259-5262.

ceipts or for your failure to ensure the perfor-

mance of all scheduled maintenance.

Dealer as soon as a problem exists.

The emission warranty is a defects warranty.

Defects are judged on normal engine perfor-

mance. The warranty is not related to an in-use

emission test.

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

2. Length of Coverage

set forth in the B&S Engine Warranty Policy.

B&S is not liable to cover failures of War-

ranted Parts caused by the use of add-on,

non-original, or modified parts.

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 delivered to

a retail purchaser.

Coverage under this warranty extends only

to the parts listed below (the emission con-

trol systems parts) to the extent these parts

were present on the engine purchased.

5. Maintenance

a. Fuel Metering System

Any Warranted Part which is not scheduled

for replacement as required maintenance or

which is scheduled only for regular inspec-

tion to the effect of “repair or replace as nec-

essary” shall be warranted as to defects for

the warranty period. Any Warranted Part

which is scheduled for replacement as re-

quired 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 perfor-

mance and durability may be used in the per-

formance of any maintenance or repairs.

The owner is responsible for the perfor-

mance of all required maintenance, as de-

fined in the B&S Operating and Maintenance

Instructions.

•

Cold start enrichment system

Carburetor and internal parts

Fuel Pump

3. No Charge

Repair or replacement of any Warranted

Part will be performed 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 Authorized B&S Ser-

vice Dealer as listed in the “Yellow Pages”

under “Engines, Gasoline,” “Gasoline En-

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

b. Air Induction System

•

Air cleaner

Intake manifold

c. Ignition System

•

Spark plug(s)

Magneto ignition system

d. Catalyst System

•

Catalytic converter

Exhaust manifold

Air injection system, Pulse valve

4. Claims and Coverage Exclusions

Warranty claims shall be filed in accordance

with the provisions of the B&S Engine War-

ranty Policy. Warranty coverage shall be ex-

cluded for failures of Warranted Parts which

are not original B&S parts or because of

abuse, neglect or improper maintenance as

e. Miscellaneous Items

6. Consequential Coverage

•

Vacuum, temperature, position,

time sensitive valves

and switches

Coverage hereunder shall extend to the fail-

ure of any engine components caused by

the failure of any Warranted Part still under

warranty.

•

Connectors and assemblies

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5,819,513

5,813,384

5,765,713

5,645,025

5,642,701

5,619,845

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

5,086,890

5,070,829

5,058,544

5,040,644

5,009,208

4,996,956

4,977,879

4,971,219

4,895,119

4,819,593

4,719,682

4,633,556

4,630,498

4,522,080

4,520,288

4,512,499

4,453,507

4,430,984

DES. 308,871

DES. 308,872

DES. 309,457

DES. 356,951

DES. 361,771

DES. 375,963

6,325,036

6,284,123

6,260,529

6,230,678

6,202,616

6,116,212

6,077,063

6,064,027

6,014,808

5,894,715

5,852,951

5,823,153

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INFORMATIONS IMPORTANTES

CORPORATION BRIGGS & STRATTON

FAMILLE YBSXS.3192VA 274812

CE MOTEUR EST CONFORME AUX NORMES

ANTIPOLLUTION 2000 – 2001 DE CALIFORNIE

POUR LES PETITS MOTEURS HORS ROUTE ET

AUX NORMES ENVIRONNEMENTALES

AMÉRICAINES (EPA PHASE 2) POUR LES

PETITS MOTEURS HORS ROUTE. CONSULTEZ

LE MANUEL DU PROPRIÉTAIRE POUR LES

SPÉCIFICATIONS, L’ENTRETIEN ET LES

AJUSTEMENTS. CONFORME À LA PÉRIODE

D’ÉMISSION EPA : CATÉGORIE : C

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