Briggs & Stratton 400000 Professional Series Manual de instalación y operación

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Operating & Maintenance

Instructions

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.

Model Series

Covered in

This Manual

400000

440000

TABLE OF CONTENTS

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

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

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

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

Starting and Stopping 9. . . . . . . . . . . . . . . . . . . . . .

Maintenance 10-13. . . . . . . . . . . . . . . . . . . . . . . . .

Adjustments 13-14. . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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.

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.

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Look For Relevant Emissions Durability Period and

Air Index Information On Your Engine Emissions Label

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.

TheEmissions 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.

The Air Index is a calculated number describing the relative level of emissions for a specific engine family. The lower the

Air Index,the cleaner the engine. This information is displayed in graphical form on the emissions label.

After July 1, 2000, Look For Emissions Compliance Period On

Engine Emissions Compliance Label

After July 1, 2000 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, B = 250 hours

and A = 500 hours. For engines of 225 cc or more, Category C = 250 hours, B = 500 hours and A = 1000 hours.

The displacement of Model Series 400000 is 656 cc and 440000 engines is 725 cc.

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The Power That Works For You.

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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.

275475

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.

WARNING

The engine exhaust from this prod-

uct contains chemicals known to the

State of California to cause cancer,

birth defects, or other reproductive

harm.

HAZARD SYMBOLS AND MEANINGS

Explosion

Toxic Fumes

Moving Parts

ShockHot Surface

Kickback

Fire

THE INTERNATIONAL SYMBOLS USED

ON THE ENGINE OR

IN THIS MANUAL INCLUDE:

On Off

Fuel Shutoff

Read Owner’s

Manual

Stop Fuel

Choke

Safety Alert

Oil

*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.

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SAFETY

Gasoline and its vapors are extremely

flammable and explosive.

Fire or explosion can cause severe burns

or death.

WARNING

WHEN ADDING FUEL

•Turn engine OFF and let engine cool at least 2

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.

•Keep gasoline away from sparks, open flames,

pilot lights, heat, and other ignition sources.

•Check fuel lines, tank, cap, and fittings frequently

for cracks or leaks. Replace if necessary.

WHEN STARTING ENGINE

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

cleaner are in place.

•Do not crank engine with spark plug removed.

•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.

WHEN OPERATING EQUIPMENT

•Do not tip engine or equipment at angle which

causes gasoline to spill.

•Do not choke carburetor to stop engine.

WHEN TRANSPORTING EQUIPMENT

•Transport with fuel tank EMPTY or with fuel shut-off

valve OFF.

WHEN STORING GASOLINE OR EQUIPMENT

WITH FUEL IN TANK

•Store away from furnaces, stoves, water heaters or

other appliances that have pilot light or other

ignition source because they can ignite gasoline

vapors.

Starting engine creates sparking.

Sparking can ignite nearby flammable

gases.

Explosion and fire could result.

WARNING

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

start engine.

•Do not use pressurized starting fluids because

vapors are flammable.

WARNING

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.

•When starting engine, pull cord slowly until

resistance is felt, then pull rapidly.

•Remove all external equipment/engine loads

before starting engine.

•Direct coupled equipment components such as,

but not limited to, blades, impellors, pulleys,

sprockets, etc., must be securely attached.

WARNING

Rotating parts can contact or entangle

hands, feet, hair, clothing, or accessories.

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.

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SAFETY

Engines give off carbon monoxide, an

odorless, colorless, poison gas.

Breathing carbon monoxide can cause

nausea, fainting or death.

WARNING

•Start and run engine outdoors.

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

doors or windows are open.

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.

•Allow muffler, engine cylinder and fins to cool

before touching.

•Remove accumulated combustibles from muffler

area and cylinder area.

•Install and maintain in working order a spark

arrester before using equipment on forest-covered,

grass-covered, brush-covered unimproved land.

The state of California requires this (Section 4442

of the California Public Resources Code). Other

states may have similar laws. Federal laws apply

on federal land.

WARNING

Unintentional sparking can result in fire or

electric shock.

Unintentional start-up can result in en-

tanglement, traumatic amputation, or lac-

eration.

BEFORE PERFORMING ADJUSTMENTS OR

REPAIRS

•Disconnect spark plug wire and keep it away from

spark plug.

•Disconnect battery at negative terminal (only

engines with electric start).

WHEN TESTING FOR SPARK

•Use approved spark plug tester.

•Do not check for spark with spark plug removed.

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.

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ENGINE INFORMATION

1. Rotating screen

2. Oilfill/Dipstick

3. 12V electric starter

4. Fuel filter (if equipped)

5. Oil drain plug

6. Spark plug wire

7. Fuel pump

8. Air cleaner

9. Intake manifold

10. Choke control bracket

11. Carburetor

12. Throttle control bracket

13. Engine Model Type Code

xxxxxx xxxx xx xxxxxxxx

14. Oil filter

GENERAL INFORMATION

This is a twin cylinder, overhead valve (OHV), air-cooled engine.

It is a low emissions engine.

In the state of California, Model Series 400000 and 440000 en-

gines 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 addition-

al warranties with respect to the performance or operational life of

this engine. This engine is warranted solely according to the prod-

uct 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.

(6 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 SERIES 400000

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

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

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

MODEL SERIES 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°.

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OIL

275475

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 1-7/8 quarts

(60 ounces; 1.8 liter).

Engine equipped with oil filter holds approximately

2 quarts (64 ounces; 1.9 liters).

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.

°F-20 0 20 40 60 80 100

°C-30 -20 -10 0 10 20 30 40

STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

*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.

** 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.

SAE Viscosity Grades

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.

[1] Remove oil fill cap

(if equipped).

Pour oil slowly.

[2] Fill to FULL line on

dipstick – recheck. [3] Replace dipstick firmly.

FULL

[4] Place engine level. Clean

around oil fill and dipstick. [5] Remove dipstick and

wipe clean with cloth.

Oil Fill

[6] Tighten dipstick down.

Remove & check oil level.

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FUEL

TYPE OF FUEL TO USE

•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).

•This engine is certified to operate on gasoline. Exhaust

Emission Control System: EM (Engine Modifications).

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.

[2] Replace cap before starting.

•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.

•If fuel spills, wait until it evaporates before

starting engine.

STARTING

WARNING

•Do not use pressurized starting fluids.

•Vapors are flammable.

OIL PRESSURE SWITCH

If engine is equipped with an oil pressure switch, the switch

will either activate a warning light or stop the engine when

the engine runs low on oil. (Read the operating instructions

supplied by the equipment manufacturer to determine

which way your engine is equipped because the equipment

manufacturer supplies the oil pressure gauge.)

See OIL PRESSURE on page 11 for oil filling instructions.

STARTING AND OPERATING TIPS

♦Store and fuel equipment in level position.

♦Use fresh fuel. (See Fuel.)

♦Use correct type of oil for expected starting

temperature. (See Oil.)

♦Remove external equipment/engine loads. (See

equipment operating instructions.)

♦Start lawn mower on hard surface or over previously

cut grass.

♦Periodically remove grass buildup under mower

deck. (See Maintenance.)

♦After engine has started, let it warm up several

seconds to several minutes, depending on outside

temperature.

♦For maximum performance and life, operate engine

with choke in RUN and throttle in FAST.

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STARTING AND STOPPING

ELECTRIC (KEY) STARTER

TO START ENGINE

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

[2] Open fuel shut-off valve

(if equipped).

[3] Move choke control to

CHOKE or START.

[4] Move throttle (if equipped) to

FAST. Operate engine with

throttle in FAST.

Choke

FULL

[5] Insert key and turn to

START.

CAUTION: To prolong

starter life, use short

starting cycles (5 se-

conds maximum, then

wait one minute).

Follow equipment

manufacturer’s rec-

ommendations for

charging battery.

[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 min-

utes in cold weather. Let

engine run smoothly be-

fore each change. Oper-

ate with choke in RUN.

TO STOP ENGINE

[1] Move throttle

(if equipped) to SLOW. [2] Turn key to OFF. Remove key and store out of reach of children.

[3] Close fuel shut-off valve (if equipped).

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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.

Follow the instructions and schedules indicated below.

Task

Performtask at hourly

or calendar interval,

whichever comes first.

Every 8 Hours

or Daily

25 Hours or

Every Season

50 Hours or

Every Season

100 Hours or

Every Season

Yearly

200 Hours or

Every Season

Check oil level 4

Change oil 4*

Change oil filter 4

Service air cleaner

pre-cleaner 4**

Replace air cleaner

cartridge 4**

Clean Extended Life

Seriesair cleaner

cartridge 4**

Replace Extended

Life Seriesair clean-

er cartridge 4**

Inspect spark arrester

(if equipped) 4

Clean cooling system 4**

Replace spark plugs 4

Replace in-line fuel fil-

ter 4

Check valve clear-

ance 4

*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.

CHANGING OIL

OIL DRAIN

PLUG

Typical

drain plugs

PIPE

3/8” SQUARE

[1] Place engine level.

[2] Disconnect spark plug

wires and keep away

from spark plugs. Dis-

connect battery (if equip-

ped with electric starter)

at negative terminal.

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

plug and drain oil into appropriate receptacle.

[4] Reinstall drain plug. Remove dipstick.

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

Do not overfill.

Note: Engine without oil filter holds approximately 1-7/8

quarts (60 ounces; 1.8 liters). Engine equipped with filter

holds approximately 2 quarts (64 ounces; 1.9 liters).

[6] Replace dipstick.

WARNING

FULL

ÏÏ

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.

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