Briggs & Stratton Q45 User manual

Operating & Maintenance

Instructions

FORM NO. 276231-7/05

PRINTED IN U.S.A.

The Power That Works For You)

Model 90000, 100000 Series covered in this manual

www.briggsandstratton.com

Quick Start Guide

on page 4

Safety References

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.

Because Briggs & Stratton does not necessarily

know what equipment this engine will power, it is

important that you read the instructions and the

instructions for the equipment this engine powers.

Table of Contents

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

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

QuickStart Guide 4. . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6. . . . . . . . . . . . . . . . . . . . . .

Starting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating & Stopping 8. . . . . . . . . . . . . . . . .

Oil 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications & Emission Information 12

Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . .

Storage & Service 16. . . . . . . . . . . . . . . . . . .

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

SYMBOLS ASSOCIATED

WITH THIS ENGINE:

Explosion

Toxic Fumes

Moving Parts

Shock

Hot Surface

Kickback

Fire

On Off

Fuel Shutoff

Read

Operating

Manual

Fuel

Choke

Oil

Run

Stop

Slow Fast

Hazardous

Chemical

WARNING

Briggs & Stratton does not approve or authorize the

use of these engines on 3-wheel All Terrain

Vehicles (ATVs), motor bikes, fun/recreational

go-karts, 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.

The engine exhaust from this product

contains chemicals known to the State of

California to cause cancer, birth defects, or

other reproductive harm.

WARNING

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.

CAUTION

Starter

Handle

Fuel Fill

Carburetor

Primer

Bulb

Spark

Plug Wire

Air Cleaner

Governor

Control Lever

(if equipped)

Know Your Engine

Oil Fill/

Dipstick

Oil Drain

Plug

Engine Model Type

XXXXX XXXX XX

Code

XXXXXXXX

Muffler/Muffler Guard (if

equipped)/Spark Arrester

(if equipped)

See page 9 for details.

HOW ?

Unscrew and remove oil cap.

Pour in oil. Replace cap.

WHAT KIND ?

High quality SAE 30 detergent oil rated SF, SG,

SH or higher.

HOW MUCH ?

To FULL line on dipstick.

Engine holds about 18 oz.

SPECIAL CONCERNS ?

Do not overfill.

Do not tip enigine.

See page 11 for details.

WARNING

Starting engine creates sparking.

Gasoline and its vapors are

extremely flammable and

explosive. Fire or explosion can

cause severe burns or death.

If fuel spills, wait until it

evaporates before starting engine.

DO NOT use pressurized starting

fluids.

HOW ?

Remove gas cap. Pour in gas. Replace cap.

WHAT KIND ?

HOW MUCH ?

Fill to one inch below top of fuel fill neck.

SPECIAL CONCERNS ?

Fuel equipment outdoors. If fuel spills, wait until

it evaporates before starting engine.

Unleaded, 85 octane or higher.

FULL

ADD OIL

WIPE DIPSTICK.

REPLACE DIPSTICK

AND TIGHTEN CAP.

REMOVE DIPSTICK

TO READ LEVEL.

1234

ADD GAS

123 4

This manual contains safety information to make you aware of the hazards and risks

associated with engines. Read the Operating Manual before starting your engine.

For complete starting instructions

see page 7.

HOW ?

Locate primer bulb. Press with finger. Wait two

seconds between each press.

HOW MANY TIMES ?

Press 5times the FIRST TIME you start engine.

For all future starts, press 3 times.

SPECIAL CONCERNS ?

Pressing primer too many times can flood

engine with gas. A flooded engine will not start.

See Troubleshooting section.

HOW ?

Stand behind equipment.

Close bail, or operator control bar, on

equipment with this feature. If you do not keep

bail held against equipment handle, engine will

not start.

Slowly pull cord until you feel resistance, then

pull quickly.

SPECIAL CONCERNS ?

Rapid retraction of starter cord

(kickback) will pull hand and arm

toward engine faster than you can

let go. To avoid kickback, slowly

pull the cord until you feel

resistance, then pull rapidly.

Broken bones, fractures, bruises

or sprains could result.

Rotating parts can contact or

entangle hands, feet, hair, clothing,

or accessories.

Traumatic amputation or severe

laceration can result.

To Stop Engine −

Let go of brake release bar, which activates

brake and stops engine from running.

WARNING

PUSH PRIMER

1 2 34

PULL STARTER HANDLE

1 2 3 4

Need assistance? 1-800-233-3723

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

www.briggsandstratton.com

If speed control equipped, start in FAST position.

Also, see warning at right.

Starter handle will not pull.

•Ensure all external equipment/engine loads are removed

before starting engine. Direct coupled equipment

components must be securely attached such as, but not

limited to, blades, impellers, pulleys, sprockets, etc.

WARNING

Troubleshooting

Engine will not start.

•Drain excess oil from engine to bring level to

FULL mark on dipstick.

•Check air cleaner filter for oil saturation.

If saturated, clean or replace filter.

rOil Level is OVER FULL

mark on dipstick. DO NOT OVERFILL.

Overfilling may cause

smoking, hard starting, spark

plug fouling or oil saturation of

air filter.

CAUTION

rOut of Fuel

rEngine Flooded

rSpark Plug Fouling

•Add gasoline.

•Prime engine.

•Set choke (if equipped) to OPEN/RUN

position, place throttle (if equipped) in FAST

and continue to pull starter handle.

•Remove spark plug. Clean, check gap,

replace. See Maintenance section.

WARNING

•Ensure fuel cap, and air

cleaner are in place

before starting engine.

•Before refueling −turn

engine OFF and let

engine cool at least 2

minutes before

removing gas cap.

•Check fuel lines, tank,

cap, and fittings for

cracks or leaks. Replace

if necessary.

•Do not crank engine with

spark plug removed.

Engine emits smoke or running rough.

•Check for fouled spark plug.

•Check air cleaner filter for oil saturation.

If saturated, clean or replace filter.

If engine is tipped to transport

equipment, to remove debris,

to drain oil, etc., keep the

spark plug side of engine up.

CAUTION

rEngine may have been

tipped during transport.

KEEP SPARK PLUG UP

rThe proper equipment handle is not

engaged which releases the brake from

the flywheel allowing the engine to turn

over.

rPlace equipment on flat level surface.

Starting

[1] Check oil level. Ensure level is at FULL mark on

dipstick. Use the correct oil type for expected

starting temperature.

[2] Fill with fresh gasoline. Move throttle to FAST.

(if equipped)

[3] Firmly push primer bulb 3 times.

Note: If starting a NEW ENGINE, press 5 times.

If engine floods, set choke to OPEN/RUN

position, place throttle in FAST (if equipped)

and crank until engine starts.

[4] Squeeze brake release bar toward handle on

mower and any other equipment with this feature.

If you do not keep brake release bar held against

mower handle, engine will not start, or remain

running.

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

felt, then pull rapidly to start engine and avoid

kickback.

•Make sure spark plug, muffler, fuel

cap and air cleaner are in place.

•Do not crank engine with spark plug

removed.

•DO NOT start engine if there is a

natural or LP gas leak in area.

•Do not use pressurized starting fluids

because vapors are flammable.

WARNING

•Start and run engine outdoors.

•Do not start or run engine in

enclosed area, even if doors or

windows are open.

WARNING

Rapid retraction of starter cord

(kickback) will pull hand and arm

toward engine faster than you can

let go. To avoid kickback, slowly pull

the cord until you feel resistance,

then pull rapidly.

Broken bones, fractures, bruises

or sprains could result.

Rotating parts can contact or

entangle hands, feet, hair,

clothing, or accessories.

Traumatic amputation or severe

laceration can result.

WARNING

Operating

Engines give off carbon

monoxide, an odorless,

colorless, poison gas.

Breathing carbon mon-

oxide can cause nausea,

fainting or death.

WARNING

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

throttle in FAST.

•Do not tip engine or

equipment at angle

which causes gasoline

to spill.

•Do not choke

carburetor to stop

engine.

Periodically remove grass

buildup under mower deck.

(See Maintenance.)

•Operate equipment with guards in

place.

•Keep hands and feet away from

rotating parts.

•Tie up long hair and remove

jewelry.

•Do not wear loose-fitting clothing,

dangling drawstrings or items that

could become caught.

WARNING

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.

WARNING

•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.

Stopping

[1] Move throttle (if equipped) to SLOW, then

[2] Release safety brake control handle.

Do not stop engine by moving choke control to

CHOKE (if equipped). Backfire, fire or engine

damage could occur.

CAUTION

WARNING

Oil

Oil Capacity

The engine holds approximately 18 oz. or 0.5 liter.

•Use a high quality detergent oil classified “For

Service SF, SG, SH, SJ” or higher, such as Briggs &

Stratton SAE 30.

•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 CONSERVING” or

higher, is an acceptable oil at all

temperatures. Use of synthetic oil

does not alter required oil change

intervals.

Oil Recommendation

°F-20 0 20 40 60 80 100

°C-30 -20 -10 0 10 20 30 40

EXPECTED STARTING TEMPERATURE RANGE BEFORE NEXT OIL CHANGE

SAE Viscosity Grades

* 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.

CAUTION

Checking Oil Level

•Check oil level before starting the engine.

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

•Keep oil level at FULL.

[1] Place engine level

and clean around oil

fill area.

[2] Remove dipstick and

wipe clean with cloth.

[3] Replace and tighten

dipstick. Remove and

check oil level. Oil level

should be at FULL line

on dipstick.

[4] If needed, add oil slowly -

recheck. Do not over fill.

[5] Wipe dipstick clean,

replace and tighten.

Remove and check oil

level. Oil level should be

at FULL line on dipstick.

Do not overfill. Overfilling with oil may cause the

engine to not start, or hard starting. If over the

FULL mark on dipstick, drain oil to reduce oil

level to FULL mark on dipstick.

CAUTION

Changing Oil

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.

[1] Run engine until it runs out of fuel. Otherwise, fuel

can leak out, creating a fire/explosion hazard,

when you tip engine in Step 4.

[2] Disconnect spark plug wire and keep it away

from spark plug.

[3] With engine OFF but still warm remove dipstick.

[4] Top oil drain, keep spark plug side up. Bottom or

side oil drain (if equipped), keep engine level.

Drain oil into appropriate receptacle.

Note: Top oil drain is recommended method,

however oil can drain from side (if equipped) or

bottom as shown.

[5] Place engine level. Add about (18 ounces: 0.5

liter) new oil. Fill to FULL line on dipstick. Do not

overfill. Replace dipstick.

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.

CAUTION

On bottom oil drain, DO NOT rotate blade or

any other parts unless spark plug wire is

disconnected from spark plug.

DRAIN

PLUGS PIPE 3/8”

SQUARE

WARNING

RATCHET

AND

EXTENSION

CUTTING

BLADE OIL DRAIN

PLUG

Low Oil Fill

(if equipped)

High Oil Fill

(if equipped)

Side Oil Drain

(if equipped)

Top Oil DrainBottom Oil Drain

SPARK PLUG

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