Briggs & Stratton Vanguard 05000 Manuale utente

Briggs & Stratton VANGUARD™SINGLE CYLINDER OHV AIR-COOLED ENGINES

1/07

Quality Starts With A

Master Service Technician

272147 - Vanguard Single Cylinder OHV Air-Cooled Engines

272144 - Vanguard Twin Cylinder OHV Air-Cooled Engines

275429 - Vanguard Twin Cylinder OHV Liquid-Cooled Engines

MS-0750 - Vanguard 3-Cylinder OHV Liquid-Cooled Gasoline Engines

MS-1055 - Vanguard 3-Cylinder OHV Liquid-Cooled Diesel Engines

Other Briggs & Stratton

Commercial Power Repair Manuals:

Vanguard Single Cylinder

OHV Air-Cooled Engines

™

POST OFFICE BOX 702

MILWAUKEE, WI 53201 USA

BRIGGSandSTRATTON.COM

BRIGGS&STRATTON

CORPORATION

Part No. 272147-1/07

272147 Vanguard Single Cylinder 4/27/07 1:03 PM Page 1

SECTION 1- Safety, Maintenance & Adjustments

SECTION 2 -Troubleshooting

SECTION 3 - Engine Disassembly

SECTION 5 - Fuel Systems & Carburetion

SECTION 6 - Governor Systems

SECTION 7- Cylinder Heads & Valves

SECTION 8 - Starters

SECTION 9 - Lubrication Systems

SECTION 10 - Cylinders, Covers & Sumps

SECTION 11 - Crankshafts, Camshafts, Balancing Systems &

Gear Reductions

SECTION 12 - Pistons, Rings & Connecting Rods

SECTION 13 - Final Engine Assembly

SECTION 14 - Engine Specifications & Reference Tables

SECTION 4 - Exhaust Systems

FORWARD

This guide has been written and published by Briggs & Stratton Corporation to aid our dealers' mechanics

and company service personnel when servicingthe products described herein.

It is assumed that these personnel are familiar with the servicing procedures for these products, or like or

similar products, manufactured byBriggs & Stratton Corporation. It is also assumed that theyhave been

trained in the recommended servicing procedures for these products, which includes theuse of mechanics

hand tools and any special tools that might be required.

Proper service and repair is important to the safe, economical and reliable operation of all engines and

engine driven systems. The troubleshooting, testing, service and repair procedures describedin this guide

are effective methods of performing such operations.

We could not possibly know of andadvise the service trade of all conceivable procedures or methods by

which aservice might be performed, nor of every possible hazards and/or results of each procedure or

method. We have not undertaken any such wideevaluation. Therefore, anyone who uses a procedure or

method not described by the manufacturermust first satisfy himself that neither his safety, nor the safety of

the product, will be endangered by the service or operating procedure selected.

All information, illustrations, and specifications contained in this guide are based on the latest production

information available at the time of publication. However, Briggs & Stratton Corporation reserves the right

to change, alter, or otherwise improve the product at any time without prior notice.

Somecomponents orassemblies of the product described inthis guide may not beconsidered repairable.

Disassembly, repair and reassembly of such components maynot be included in this guide.

No part ofthis material may be reproduced or transmitted, in any form or by any means, electronic or

mechanical, including photocopying, recording or by any information storage and retrieval system, without

prior permission in writing from Briggs & Stratton Corporation.

SECTION 1 - SAFETY, MAINTENANCE AND ADJUSTMENTS

ENGINE SAFETY ................................................................................. 5

InTheInterest Of Safety ..................................................... 5

The SafetyAlert Symbol....................................................................... 5

Additional Precautions.......................................................................... 8

BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEM..... 9

ENGINE MAINTENANCE................................................................... 10

Fuel and Oil Recommendations.......................................................... 10

Changing Oil.......................................................................................11

MAINTENANCE SCHEDULE............................................................. 12

Air Cleaner Service.............................................................................13

In-Line Fuel Filter Service................................................................... 15

ENGINE ADJUSTMENTS .................................................................. 15

Armature Air Gap Adjustments...........................................................15

Carburetor Idle-Mixture Adjustments..................................................15

Control Adjustments...........................................................................16

Cooling System Maintenance............................................................. 18

Flywheel Brake Adjustments (104700) ............................................... 19

Governor Adjustments........................................................................ 19

Electro-Magnetic Idle Down Adjustments ........................................... 25

Spark Plug Maintenance..................................................................... 26

Valve Clearance Adjustments.............................................................26

Combustion Chamber Deposits......................................................... 27

ENGINE SAFETY

In The Interest Of Safety

This repair manual contains safety information

that is designed to:

• Make you aware of hazards associated

with engines.

• Inform youof the risk ofinjury associated

with those hazards.

• Tell you how to avoid or reduce the risk

of injury.

•

The Safety Alert Symbol

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

likelihoodand the potential severity of injury. In

addition, a hazard symbol may be used to

represent the type of hazard.

DANGERindicates 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 this signal word is used

without the alert symbol, it indicates a situation

that could result in damage to the engine.

• Prior towork, read and understand the

section(s) of this manual that pertain to

the job. Follow all safety warnings.

• Wear suitable eye protection.

• When servicing engines or equipment,

prevent accidental startingby removing

the spark plug wire from the spark

plug(s).

• Disconnect negative battery terminal if

the application is equipped with an

electric starting system.

• Periodically clean engine. Keep governor

parts free of dirt, grass and other debris

which can affect engine speed and

cooling.

• Always use fresh gasoline. Stale fuelcan

cause gum deposits in the carburetor

and cause leakage, flow restrictions or

other failures.

• Checkfuel lines and fittings frequently for

cracks or leaks and replace if necessary.

WARNING

Before attempting to service this

equipment, read and understand this

manual and the operating instructions of

the equipment it powers.

Failure to FOLLOW instructions could resultin

DEATH, SERIOUS INJURY (including

paralysis) or property damage.

WARNING

Briggs & Stratton does not approve or

authorize the use of these engines on 3-

wheel All Terrain Vehicles (ATV’s),

motorbikes, fun/recreational vehicles for

use in competitive events. Use of these

engines is such applications could result in

property damage, serious injury (including

paralysis), or even death.

HAZARD SYMBOLS AND

MEANINGS

Explosion Fire Shock

Goggles Chemical Explosive

Burns Pressure

Kick Hot Entanglement

Back Surface

Toxic Read Disconnect

Fumes Spark Plug

WARNING

The engine exhaust from this product

contains chemicals known to the State of

California to cause cancer, birth defects

and other reproductive harm.

WARNING

Gasoline and its vapors are extremely

flammable and explosive.

Fire or explosion can cause severe burns or

death.

When adding fuel:

•Turn engine OFF and let engine cool at

least 2 minutes before filling or refilling.

•Fill fuel tank outdoors or in a well-

ventilated area.

•Do not overfill fuel tank. Fill tankto

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 and

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, setchoke to

OPEN/RUN position. Place throttle in

FAST and crank until engine starts.

When operating equipment:

•Do not tip engine or equipment at an

angle which would cause fuel to spill.

•Do not choke carburetor to stop

engine.

When transporting equipment:

•Transport with fuel tank empty or with

fuel shut-off valve set to OFF.

When storing gasoline or equipment with

fuel in tank:

•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.

DANGER

Running engines produce heat.

Temperature of muffler andsurrounding

areas can exceed 150°F (65°C). Severe

burns can occur on contact.

•Allow muffler,engine cylinder fins and

radiator to cool before touching.

•Remove accumulated combustibles

from muffler area and cylinder area.

•Install and maintain in working order a

spark arrestor before using equipment

on forest-covered, brush-covered

unimproved land. The state of

California requires this (Section 4442

of thePublic 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

severe lacerations.

Before performing adjustments or repairs:

•Disconnect sparkplug wire and keep it

away from spark plug.

•Disconnect negative (-) battery

terminal.

When testing for spark:

•Use approved spark plug tester.

•Do not check for spark with spark plug

removed.

DANGER

Engines give off carbon monoxide, an

odorless, colorless, poison gas.

Breathing carbon monoxide can cause

nausea, fainting or death.

•Start and run engine outdoors.

•Do not start or run engine in an

enclosed area, even if doors and

windows are open.

DANGER

Starting engine creates sparking. Sparking

can ignite nearby flammable gases.

Explosion and fire could result.

•If there is a natural or LP gas leakage

in the area, do not start engine.

•Do not use pressurized starting fluids

because vapors are flammable.

DANGER

Rotating parts cancontact or entangle

hands, feet, hair, clothing or accessories.

Traumatic amputation or severe lacerations

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 entangled in the

equipment.

WARNING

Kerosene and its vapors are extremely

flammable and should be handled with the

same precautions as gasoline.

DANGER

Broken bones, fractures, bruises or sprains

could result.

•Remove all external equipment/engine

loads before starting engine.

•Direct-coupled equipment components

such as, but not limited to blades,

impellers, pulleys and sprockets must

be securely attached.

WARNING

All fuel components should be in good

condition and properly maintained.

•Repairs should only be made with

factory approved parts.

•Repair work should be done by a

qualified technician.

•Flexible supply lines should be

checked regularly to make sure they

are in good condition.

WARNING

Charging batteries produces hydrogen gas.

Do not store or charge andbattery near an

open flame or devices that utilize a pilot

light or can create a spark.

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