Briggs & Stratton 440000, 400000 User Manual

Operator’s Manual

Model 400000 Model 440000

Intek
Extended Life Series

Intek
Extended Life Series

BRIGGSandSTRATTON.com

ECopyright Briggs & Stratton Corporation

Milwaukee, Wisconsin 53201 U.S.A.

Form No. 277103-3/07

Printed in U.S.A.

Safety References

SYMBOLS ASSOCIATED

WITH THIS ENGINE:

The safety alert symbol is used to identify safety
information about hazards that can result in personal
injury. 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.

This manual contains safety

information to make you aware of
the hazards and risks associated with engines, and
how to avoid them. Because Briggs & Stratton does
not necessarily know what equipment this engine will
power, it is important that you read and understand
these instructions and the instructions for the
equipment this engine powers.

Read

Fire

Explosion

Kickback

Hot Surface

Toxic F ume s

Moving Parts

Shock

Hazardous
Chemical

Slow Fast

Operating
Manual

Oil

Fuel

Fuel Shutoff

On Off

Run

Choke

Stop

Table of Contents

Safety References 2. . . . . . . . . . . . . . . . . . . . . . . . .

Features 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Information 4. . . . . . . . . . . . . . . . . . . . . . . . .

Starting 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stopping 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage and Service 15. . . . . . . . . . . . . . . . . . . . . .

Specifications and Emission Information 16. . . . .

Warranty Information 17. . . . . . . . . . . . . . . . . . . . . .

2

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.

WARNING

The engine exhaust from this product contains
chemicals known to the State of California to
cause cancer, birth defects, or other reproductive
harm.

CAUTION

This engine is shipped from Briggs & Stratton
without oil. If you start the engine without oil, the
engine will be damaged beyond repair and will
not be covered under warranty.

Features

3

4

1

2

10

5

6

1. Dipstick/Oil fill

2. Rotating screen

3. Fuel pump

4. Air cleaner

5. Intake manifold

6. Choke control bracket

7. Carburetor

8. Speed control bracket

9. Engine Identification
(Model-Type-Code)

10. Spark plug wire

11. Oil filter

12. Fuel filter (if equipped)

13. 12V electric starter

14. Oil drain plug

7

8

9

11

4

3

1

12

14

13

10

3

Safety Information

WARNING

Gasoline and its vapors are extremely
flammable and explosive.

Fire or explosion can cause severe
burns or death.

WHEN ADDING FUEL

S Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.

S Fill fuel tank outdoors or in well-ventilated

area.

S Do not overfill fuel tank.
S Keep gasoline away from sparks, open

flames, pilot lights, heat, and other ignition
sources.

S Check fuel lines, tank, cap, and fittings

frequently for cracks or leaks. Replace if
necessary.

WHEN STARTING ENGINE

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

cleaner are in place.

S Do not crank engine with spark plug removed.
S If fuel spills, wait until it evaporates before

starting engine.

S If engine floods, set choke to OPEN/RUN

position, place throttle in FAST and crank until
engine starts.

WHEN OPERATING EQUIPMENT

S Do not choke carburetor to stop engine.

WHEN TRANSPORTING EQUIPMENT

S Transport with fuel tank EMPTY.

WHEN STORING GASOLINE OR EQUIPMENT
WITH FUEL IN TANK

S Store away from furnaces, stoves, water

heaters or other appliances that have pilot
light or other ignition source because they can
ignite gasoline vapors.

WARNING

Engines give off carbon monoxide, an
odorless, colorless, poison gas.

Breathing carbon monoxide can
cause nausea, fainting or death.

S Start and run engine outdoors.
S Do not start or run engine in enclosed area,

even if doors or windows are open.

WARNING

Starting engine creates sparking.
Sparking can ignite nearby flammable

gases.
Explosion and fire could result.

S If there is natural or LP gas leakage in area, do

not start engine.

S Do not use pressurized starting fluids because

vapors are flammable.

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.

S When starting engine, pull cord slowly until

resistance is felt, then pull rapidly.

S Direct coupled equipment components such as,

but not limited to, blades, impellers, pulleys,
sprockets, etc., must be securely attached.

4

Safety Information

WARNING

Rotating parts can contact or entangle
hands, feet, hair, clothing, or accesso­ries.

Traumatic amputation or severe lacera­tion can result.

S Operate equipment with guards in place.
S Keep hands and feet away from rotating parts.
S Tie up long hair and remove jewelry.
S 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.

S Allow muffler, engine cylinder and fins to cool

before touching.

S Remove accumulated combustibles from

muffler area and cylinder area.

S 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

Unintentional sparking can result in
fire or electric shock.

Unintentional start-up can result in
entanglement, traumatic amputation,
or laceration.

BEFORE PERFORMING ADJUSTMENTS
OR REPAIRS

S Disconnect spark plug wire and keep it away

from spark plug.

S Disconnect battery at negative terminal (only

engines with electric start.)

S Do not strike the flywheel with a hammer or

hard object because the flywheel may later
shatter during operation.

S Do not tamper with governor spring, links or

other parts to increase engine speed.

S Use only correct tools.

WHEN TESTING FOR SPARK

S Use approved spark plug tester.
S Do not check for spark with spark plug

removed.

5

Starting

1. Check oil level. Ensure level is at FULL mark on
dipstick. Use a high quality motor oil. Review oil
recommendations for selection of oil grade for
expected starting temperature.

2. Open the fuel shut-off valve, if equipped.

3. Move choke control to CHOKE and speed control to
FAST or RUN.

4. Insert key and turn to START.

Note: To prolong starter life, use short starting
cycles (5 seconds maximum, then wait one
minute). Follow equipment manufacturer’s
recommendations for charging battery.

5. Let engine warm up.

6. 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 smoothly before each
change.

7. Operate with choke in RUN or OPEN position.

Stopping

1. Move speed control to SLOW, if equipped.

2. Turn key to OFF. Remove key and store out of
reach of children.

3. Close fuel shut-off valve, if equipped.

CAUTION

Operation of this engine is for the application it
was intended. All the components used to build
this engine assembly must remain in place for
the proper operation of this engine.

OIL PRESSURE SWITCH

If engine is equipped with an oil pressure switch, read the
operating instructions supplied by the equipment
manufacturer to understand how the switch functions.

WARNING

Engines give off carbon
monoxide, an odorless, colorless,
poison gas.

Breathing carbon monoxide can
cause nausea, fainting or death.

WARNING

DO NOT stop engine by choking
carburetor. Backfire, fire or engine
damage could occur.

1-800-233-3723

Need assistance?

6

(USA and Canada ONLY, Pre-recorded message.)

www.briggsandstratton.com

Troubleshooting

Engine will not start.

r Out of Fuel

S Add clean fresh fuel.

r Engine Flooded

S Move CHOKE to RUN position. Turn engine over

(use short starting cycles 5 seconds, then wait a
minute) until engine starts.

r Low Oil

S Check oil level with dipstick.

S Refer to Oil Pressure Switch in Maintenance section of

this manual.

r Spark Plug Fouling

S Remove spark plug. Clean, check gap, re-install. Refer to

Maintenance section for details.

r Oil Level is OVER FULL mark on dipstick.

S Drain excess oil from engine to bring level to FULL mark

on dipstick.

S Check air cleaner filter for oil saturation.

If saturated, clean or replace filter.

WARNING

S Ensure fuel cap, and air

cleaner are in place
before starting engine.

S Before refueling − turn

engine OFF and let
engine cool at least 2
minutes before
removing gas cap.

S Check fuel lines, tank,

cap, and fittings for
cracks or leaks.
Replace if necessary.

S Do not crank engine with

spark plug removed.

CAUTION

DO NOT OVERFILL.
Overfilling crankcase with oil
may cause smoking, hard
starting, spark plug fouling or
oil saturation of air filter.

Engine is Smoking or Running Rough.

r Spark Plugs Fouled

S Check and ensure the spark plugs are clean. Check the

gap with a feeler gauge. If necessary, reset to .76 mm
or .030 in.

S Replace the spark plugs if upon inspection the

electrode is burned or worn.

r Air Cleaner Dirty

S Ensure there is nothing blocking the air intake of the

engine. Check the air cleaner cartridge for dirt or
debris that may be clogging air movement. If very
dirty replace with new cartridge.

CAUTION

If engine is tipped to transport
equipment, to remove debris,
to drain oil, etc., keep the

spark plug side of engine
up.

7

Oil

Capacity

Engine without oil filter holds approximately 1-7/8 quarts
(60 ounces; 1.8 liter).

Engine equipped with oil filter holds approximately
2 quarts (64 ounces; 1.9 liters).

Recommendations

S Use a high quality detergent motor oil, such as

Briggs & Stratton 30W, Part Number 100005 (20 oz)
or 100028 (48 oz).

S DO NOT use special additives.

S Choose a viscosity according to the table shown.

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 and Adding Oil

1. Place engine level. Clean around dipstick and oil fill.

2. Remove dipstick and wipe clean with cloth.

3. Tighten dipstick down. Remove & check oil level.

4. If oil is needed, slowly pour into oil fill tube.
Add only a couple ounces and recheck level.

5. Fill to FULL line on dipstick.

6. Replace dipstick. Tighten down firmly.

SAE Viscosity Grades

**

*

-20 0 20 40 60 80 100

°F

-30 -20 -10 0 10 20 30 40

°C

STARTING TEMPERAT URE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

32

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.

** SAE 30 oil, if used below 40° F (4° C), will

result in hard starting and possible engine
bore damage due to inadequate lubrication.

8 oz.

8

Fuel

Recommendations

S 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.

S Do not use gasoline which contains Methanol.
S Do not mix oil with gasoline.
S For engine protection use Briggs & Stratton

Gasoline Additive available from your Authorized
Briggs & Stratton Dealer (P/N 5041 or single use
pouch).

S This engine is certified to operate on gasoline.

Exhaust Emission Control System: EM (Engine
Modifications).

Adding Fuel

1. Clean area around fuel cap and remove.

2. Replace cap before starting.

CAUTION

Some fuels, called oxygenated or reformulated
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.

WARNING

S Turn engine OFF and let engine

cool at least 2 minutes before
removing fuel cap.

S Fill fuel tank outdoors or in

well-ventilated area.

S DO NOT overfill fuel tank. Fill tank

to approximately 1-1/2 inches
below top of neck to allow for fuel
expansion.

S If fuel spills, wait until it evaporates

before starting engine.

S Keep fuel away from sparks, open

flames, pilot lights, heat and other
ignition sources.

S Check fuel lines, tank, cap, and

fittings frequently for cracks or
leaks. Replace if necessary.

9

Maintenance

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.

Emission Control

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. See Emission Warranty
section for details.

Follow the instructions and
schedules indicated below.

WARNING

Unintentional sparking can result
in fire or electric shock.

Fire or explosion can cause
severe burns or death.

Unintentional start-up can result
in entanglement, traumatic
amputation, or laceration.

Before performing maintenance:

S Disconnect spark plug wire and

keep it away from spark plug.

S Disconnect battery at negative

terminal (only engines with electric
start).

S Do not strike the flywheel with a

hammer or hard object because the
flywheel may later shatter during
operation.

S Do not tamper with governor spring,

links or other parts to increase
engine speed.

S Use only correct tools.

When testing for spark:

S Use approved spark plug tester.
S Do not check for spark with spark

plug removed.

Task

Perform task at hourly
or calendar interval,
whichever comes first.

Check Oil Level

Clean Debris

Service Air Cleaner*

Change Oil **

Replace Spark Plugs

Clean Air Cooling System

Replace Fuel Filter, If Equipped

Clean Combustion Chamber

* Clean more often under dusty conditions or when airborne debris is present. Replace air cleaner, if very dirty.
** Change oil after first 5 to 8 hours of use, then every 50 hours. Change oil every 25 hours when operating the

engine under heavy load or in high temperatures.

10

Changing Oil

Change oil after first 5 to 8 hours of use, then every 50

hours. Change oil every 25 hours when operating the
engine under heavy load or in high temperatures.

1. Place engine/equipment level.

2. Change oil with engine OFF but still warm.

3. Clean around oil drain plug

4. Drain oil into appropriate receptacle.

5. Reinstall drain plug.

6. Clean around dipstick and remove.

7. Fill to FULL mark on dipstick with new oil. DO

NOT OVERFILL.

Note: See Oil Capacity.

8. Reinstall dipstick firmly.

 and remove.



Changing Oil Filter

Change oil filter after every 100 hours of use or every
season.

1. After draining engine oil, remove oil filter.

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.

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.



WARNING

S Disconnect spark plug wires and

keep away from spark plugs.

S Disconnect battery at negative pole.

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.

Oil Pressure Switch

If engine is equipped with an oil pressure switch, the
equipment will have a device that warns of a drop in oil
pressure. Read the operating instructions supplied by
the equipment manufacturer to understand how the
device functions.

The device may indicate low pressure if the oil level
drops below the ADD mark on the dipstick. See
“Checking And Adding Oil”.

CAUTION

If oil pressure signal continues and the 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.



11

Extended Life Seriest Air Cleaner

1. To remove, loosen the screws of the air cleaner
cover and pull cover off.

2. The air cleaner cartridge is located under the
cover. To remove the cartridge, pull up along the
outside edge until it snaps out.

3. Inspect the cartridge and brush off any dirt or
debris. Clean engine around air cleaner area.

CAUTION

Do not use pressurized air or a solvents to clean
cartridge. (They may damage the cartridge.)

Improper installation of air cleaner cover may
cause damage to engine.





Note: The cartridge is surrounded by a thin foam
sleeve. If this sleeve is torn or damaged, replace the
entire cartridge.

CAUTION

DO NOT OIL the foam sleeve or the cartridge, this

will damage the cartridge. If there is oil or heavy
debris on the cartridge, replace immediately.

4. Replace cartridge by aligning the hole of the

cartridge with the air vent on the engine. 

5. Push the cartridge in, toward the engine, until
cartridge snaps into place.

6. Reinstall air cleaner cover and tighten screws.











12

Flat Panel Air Cleaner

1. See illustration for removing and installing air
cleaner cover.

2. Carefully remove air cleaner cartridge, and foam
pre-cleaner (if equipped) to prevent debris from
entering carburetor.

3. Wash pre-cleaner in liquid detergent and water to
clean. Squeeze dry in a clean cloth. Saturate with
engine oil. Remove ALL EXCESS oil on
pre-cleaner by squeezing inside a clean
absorbent cloth.

Note: Always replace cartridge and pre-cleaner if

damaged.

4. Install pre-cleaner in base with mesh side up.

5. Install cartridge on pre-cleaner.

6. Replace cover. To ensure proper fit, tabs
equipped), must be hooked and visible into slots

.

7. Tighten knobs completely to secure cover.

 (if

CAUTION

Do not use pressurized air or a solvents to clean
cartridge. (They may damage the cartridge.)

Improper installation of air cleaner cover may
cause damage to engine.





Spark Plug

Check the spark plug every 100 hours. Replace the
spark plug if upon inspection the electrodes  are
burned or worn. Ensure the spark plug is clean. Check
the gap
or 0.030 in. if necessary. Use only Briggs & Stratton
Spark Tester (part number 19368) to check for spark.

Note: In some areas, local law requires using resistor

 with a feeler gauge  and reset to .76 mm

spark plug to suppress ignition signals. If this
engine was originally equipped with resistor
spark plug, use same type for replacement.

Fuel System

Drain fuel tank or close fuel shut-off valve before
replacing fuel filter. Otherwise, fuel can leak out
creating a fire/explosion hazard.
Replacement parts for fuel system (cap, hoses, tanks,
filters, etc.) must be the same as original parts,
otherwise fire can occur.

Replace in-line fuel filter, if equipped, every 100 hours.

Muffler

Replacement parts for the muffler must be the same
and installed in the same position as the original parts,
otherwise fire can occur.



WARNING

WARNING





FUEL FILTER

13

Carburetor Adjustment

The carburetor on this engine is not adjustable.

Engines operated above 5000 feet (1524 meters) may
require a high altitude carburetor main jet. Contact a
Briggs & Stratton Authorized Service Dealer for high
altitude carburetor main jet information.

Combustion Deposits

We recommend that after every 100-400 hours you
have an authorized Briggs & Stratton Service Dealer
remove combustion deposits from the cylinder, cylinder
head, top of piston, and around valves.

Cleaning Debris

Daily or before every use, clean accumulated debris
from engine. Keep linkage, spring and controls clean.

Keep muffler area clean and muffler in working order.
Daily or more often, before running engine, clean
muffler area to remove all grass and combustible
debris. If engine muffler is equipped with spark arrester
screen, remove for cleaning and inspection. Replace if
damaged or plugged.

Air Cooling System

Over time debris may accumulate in cylinder cooling
fins and cannot be removed without partial engine
disassembly. We recommend that you have an
authorized Briggs & Stratton Service Dealer clean the
air cooling system at the recommended intervals.

Proper cleaning will require the removal of blower
housing and cleaning of areas shown.

overheating and engine damage.
Equally important is to keep top of engine free from
debris. See Cleaning Debris section.

 This prevents

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.

WARNING

Engine parts should be kept clean to reduce
the risk of overheating and ignition of accu­mulated debris.

CAUTION

Do not use water to clean engine parts. Water
could contaminate fuel system. Use a brush or dry
cloth.

14



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 plug and pour about 1/2 oz. (15ml)
of engine oil into cylinder. Replace spark plug 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

When Transporting Equipment:

S Transport with fuel tank EMPTY

or with fuel shut-off valve OFF.

When storing gasoline or
equipment with fuel in tank:

S Store away from furnaces,

stoves, water heaters, or other
appliances that have a pilot light
or other ignition source because
they can ignite gasoline vapors.

Service

Contact 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 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 Pagest” 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.

PARTIAL LIST OF

GENUINE BRIGGS & STRATTON

PARTS

Oil 100005 or 100028. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Extended Life Series™ oil filter 696854. . . . . . . . . . . . . .

Standard Oil Filter 492932 or 5049. . . . . . . . . . . . . . . . .

Extended Life Series™ air cleaner cartridge 792105. . .

Flat panel air cleaner cartridge 499486. . . . . . . . . . . . . .

Flat panel air cleaner pre-cleaner 273638. . . . . . . . . . . .

Extended Life Series™ Fuel Filter (3.5” length) 695666

Standard Fuel filter (2.75” length) 691035. . . . . . . . . . . .

Gas Additive 5041. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Resistor Spark Plug 491055. . . . . . . . . . . . . . . . . . . . . . .

Long Life premium Spark Plug 5066. . . . . . . . . . . . . . .

Static Suppression Spark Plug 691043. . . . . . . . . . . . . .

Spark Plug Wrench 19374. . . . . . . . . . . . . . . . . . . . . . . . .

Spark Tester 19368. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil Pump Kit 5056. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

An illustrated shop manual includes common
specifications and detailed information covering
adjustment, tune-up and repair of Briggs & Stratton
V-Twin engines. It is available for purchase from an
Authorized Briggs & Stratton Service Dealer P/N
273521 or you can order it from

www.briggsandstratton.com

15

Specifications

We recommend that you contact an authorized Briggs
& Stratton Service Dealer for all maintenance and
service of the engine and engine parts. Use only
genuine Briggs & Stratton parts.

In the state of California, Model 400000 and 440000
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.

Tune-up Specifications

Armature air gap 0.008 − 0.012 in. (0.20 − 0.30 mm). .

Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . .

Valve clearance with valve springs installed and piston 1/4
in. (3 mm) past top dead center (check when engine is
cold). See Repair Manual P/N 273521.

Intake 0.004 − 0.006 in. (0.10 − 0.15 mm). . . . . . . . . . . .

Exhaust 0.004 − 0.006 in. (0.10 − 0.15 mm). . . . . . . . . .

Model 400000

Bore 2.97 in. (75.44 mm). . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2.89 in. (73.4 mm). . . . . . . . . . . . . . . . . . . . . . . . .

Displacement 40.0 cu. in. (656cc). . . . . . . . . . . . . . . . . . .

Model 440000

Bore 3.12 in. (79.25 mm). . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2.89 in. (73.4 mm). . . . . . . . . . . . . . . . . . . . . . . . .

Displacement 44.2 cu. in. (725 cc). . . . . . . . . . . . . . . . . .

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, Type and Code Number

To get replacement parts or technical assistance in the
future write your engine Model, Type and Code number
along with the date of purchase here. These numbers
are located on your engine.

Model

Type

Code

Purchase Date

Technical Information

Engine Power Rating Information

The gross power rating for individual gas engine models is
labeled in accordance with SAE (Society of Automotive
Engineers) code J1940 (Small Engine Power & Torque Rating
Procedure), and rating performance has been obtained and
corrected in accordance with SAE J1995 (Revision 2002-05).
Torque values are derived at 3060 RPM; horsepower values
are derived at 3600 RPM. Actual gross engine power will be
lower and is affected by, among other things, ambient
operating conditions and engine-to-engine variability. Given
both the wide array of products on which engines are placed
and the variety of environmental issues applicable to operating
the equipment, the gas engine will not develop the rated gross
power when used in a given piece of power equipment (actual
“on-site” or net power). This difference is due to a variety of
factors including, but not limited to, accessories (air cleaner,
exhaust, charging, cooling, carburetor, fuel pump, etc.),
application limitations, ambient operating conditions
(temperature, humidity, altitude), and engine-to-engine
variability. Due to manufacturing and capacity limitations,
Briggs & Stratton may substitute an engine of higher rated
power for this Series engine.

Emission Information

Engines that are certified to meet the California Air
Resources Board (CARB) Tier 2 Emission Standards
must display information regarding the Emissions
Durability Period and the Air Index. Briggs & Stratton
makes this information available to the consumer on
our emission labels. The engine emission label will
indicate certification information.

The Emissions Durability Period describes the
number of hours of actual running time for which the
engine is certified to be emissions compliant, assuming
proper maintenance in accordance with the Operating
& Maintenance Instructions. The following categories
are used:

Moderate:

Engine is certified to be emission compliant for 125
hours of actual engine running time.

Intermediate:

Engine is certified to be emission compliant for 250
hours of actual engine running time.

Extended:

Engine is certified to be emission compliant for 500
hours of actual engine running time. For example, a
typical walk-behind lawn mower is used 20 to 25 hours
per year. Therefore, the Emissions Durability Period
of an engine with an intermediate rating would equate
to 10 to 12 years.

Certain Briggs & Stratton engines will be certified to
meet the United States Environmental Protection
Agency (USEPA) Phase 2 emission standards. For
Phase 2 certified engines, the Emissions Compliance
Period referred to on the Emissions Compliance label
indicates the number of operating hours for which the
engine has been shown to meet Federal emission
requirements.

For engines less than 225 cc displacement:
Category C = 125 hours
Category B = 250 hours
Category A = 500 hours

For engines of 225 cc or more displacement:
Category C = 250 hours
Category B = 500 hours
Category A = 1000 hours

16

Warranty Information

Briggs & Stratton Corporation (B&S), the California Air Resources Board (CARB)

and the United States Environmental Protection Agency (U.S. EPA)

Emissions Control System Warranty Statement

(Owner’s Defect Warranty Rights and Obligations)

The California Air Resources Board (CARB), U.S. EPA and
B&S are pleased to explain the Emissions Control System
Warranty on your small off-road engine (SORE). In
California, new small off-road engines model year 2006 and
later 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 emissions control system on your engine for the

periods of time listed below, provided there has been no
abuse, neglect or improper maintenance of your small
off-road engine.

Your emissions control system includes parts such as the
carburetor, air cleaner, ignition system, fuel line, muffler and
catalytic converter. Also included may be connectors and
other emissions 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 Emissions Control Defects Warranty Coverage

Small off-road engines are warranted relative to emissions 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 performance of the required maintenance listed in your
Operating and Maintenance Instructions. B&S recommends
that you retain all your receipts covering maintenance on
your small off-road engine, but B&S cannot deny warranty
solely for the lack of receipts or for your failure to ensure the
performance of all scheduled maintenance.

As the small off-road engine owner, you should however be
aware that B&S may deny you warranty coverage if your
small off-road engine or a part has failed due to abuse,
neglect, improper maintenance or unapproved
modifications.

You are responsible for presenting your small off-road engine
to an Authorized B&S Service Dealer as soon as a problem
exists.

The undisputed warranty repairs should be completed in a
reasonable amount of time, not to exceed 30 days.

If you have any questions regarding your warranty rights and
responsibilities, you should contact a B&S Service
Representative at 1-414-259-5262.

The emissions warranty is a defects warranty. Defects are
judged on normal engine performance. The warranty is not
related to an in-use emissions test.

Briggs & Stratton Emissions Control Defects Warranty Provisions

The following are specific provisions relative to your Emissions 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
Coverage under this warranty extends only to the parts
listed below (the emissions control systems parts) to the
extent these parts were present on the engine
purchased.
a. Fuel Metering System

• Cold start enrichment system

• Carburetor and internal parts

• Fuel pump

• Fuel line, fuel line fittings, clamps

• Fuel tank, cap and tether

• Carbon canister

b. Air Induction System

• Air cleaner

• Intake manifold

• Purge and vent line

c. Ignition System

• Spark plug(s)

• Magneto ignition system

d. Catalyst System

• Catalytic converter

• Exhaust manifold

• Air injection system, Pulse valve

e. Miscellaneous Items

• 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 delivered to a retail purchaser.

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 Service Dealer as listed in the “Yellow
Pages” under “Engines, Gasoline,” “Gasoline Engines,”
“Lawn Mowers,” or similar category.

4. Claims and Coverage Exclusions
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 maintenance 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.

5. Maintenance
Any Warranted Part which is not scheduled for
replacement as required maintenance or which is
scheduled only for regular inspection to the effect of
“repair or replace as necessary” shall be warranted 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.

6. Consequential Coverage
Coverage hereunder shall extend to the failure of any
engine components caused by the failure of any
Warranted Part still under warranty.

17

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 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.

If a customer differs with the decision of the Service
Dealer, an investigation will be made to determine
whether the warranty applies. Ask the Service Dealer
to submit all supporting facts to his Distributor or the
Factory for review. If the Distributor or the Factory
decides that the claim is justified, the customer will be
fully reimbursed for those items that are defective. To
avoid misunderstanding which might occur between
the customer and the Dealer, listed below are some of
the causes of engine failure that the warranty does not
cover.

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 cleaning grit, or other abrasive
material that has entered the engine because of
improper maintenance, is not covered by warranty.

This warranty covers engine related defective
material and/or workmanship only
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 engine 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.)

, and not

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 Operating & 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-oil the
Oil-Foam
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, improper attachment of
equipment to engine crankshaft, over-speeding or
other abuse in operation.

9. A bent or broken crankshaft, caused by striking a
solid object with the cutter blade of a rotary lawn
mower, or excessive 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 “Yellow Pages™” of your
telephone directory under “Engines, Gasoline” or
“Gasoline Engines,” “Lawn Mowers,” or similar
category.

element or the foam pre-cleaner, and

18

BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY

Effective 12/06

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

LIMITED WARRANTY

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 and is subject to the time
periods and 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.

WARRANTY TERMS **

Brand / Product Type Consumer Use Commercial Use

Vanguard 2 years 2 years
Extended Life Series, I/C, Intek I/C, Intek Pro 2 years 1 year
Kerosene Fuel Operated Engines 1 year 90 days
All Other Briggs & Stratton Engines 2 years 90 days

** Engines used on Home Standby Generator applications are warranted under consumer use only.
This warranty does not apply to engines on equipment used for prime power in place of a utility.

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

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.

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
6,542,074

6,520,141
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
6,347,614

6,325,036
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
6,202,616

6,145,487
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
6,014,808

6,012,420
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
5,809,958

5,803,035
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
5,497,679

5,548,955
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
5,265,700

5,243,878
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
5,150,674

5,138,996
5,086,890
5,070,829
5,058,544
5,040,644
5,009,208
4,996,956
4,977,879
4,977,877
4,971,219
4,895,119

4,875,448
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
4,430,984

D 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

19