Briggs & Stratton Vanguard 10V300 Betriebsanleitung

10V300/12V300 Repair Manual

381584EN (Revision A)

BRIGGS&STRAT TON, LLC

CUSTOMER EDUCATION

Milwaukee, WI 53201 USA

VANGUARDPOWER.COM

Vanguard®Single Cylinder OHV

Air Cooled Engine Repair

10V300/12V300

REPAIR MANUAL

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Foreword

This manual was written to assist engine technicians and service personnel with the maintenance and

repair procedures for Briggs & Stratton® engines. It assumes that persons using this manual have been

properly trained and are familiar with the service procedures for these products, including the proper use

of required tools and the application of appropriate safety practices. Persons untrained or unfamiliar with

these procedures or products should not attempt to perform such work.

Proper maintenance and repair is important to safe, reliable operation of all engines and engine-

driven systems. The maintenance, troubleshooting, and repair procedures described in this manual are

appropriate for the Briggs & Stratton engines described herein. Alternative methods or procedures may

pose risks to both personal safety and engine reliability and are not endorsed or recommended by Briggs

& Stratton.

All information, illustrations, and specifications contained in this manual were based on the data available

at the time of publication. Briggs & Stratton, LLC reserves the right to change, alter, or otherwise improve

the product or the product manuals at any time without prior notice.

Briggs & Stratton offers two complementary publications to enhance understanding of engine technology,

maintenance, and repair. However, neither publication is a substitute for a recognized training program for

engine technicians.

• For consumers, Small Engine and Equipment Maintenance Guide (Part No. CE8155) provides a

comprehensive overview of how small air-cooled engines work, basic troubleshooting, and step-by-

step maintenance procedures.

• For engine technicians and consumers alike, an in-depth study of engine theory and operation can be

found in the textbook Small Engines (Part No. CE8020).

Both publications can be purchased at BRIGGSandSTRATTON.COM or through a local Briggs & Stratton

Authorized Service Dealer.

No part of this manual may be reproduced or transmitted in any form or by any means, electronic or

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

prior written permission from Briggs & Stratton, LLC.

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This engine repair manual includes the following engine models:

• MODEL 10V300

• MODEL 12V300

NOTE: Some models have limited service parts. Review the Illustrated

Parts List for part availability before conducting any service work.

NOTE: The images in this document are representative and may differ according to model.

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HOW TO USE THIS MANUAL

Besides describing the service maintenance tasks and the intervals at which they are to be performed,

two basic levels of service are presented in this manual: engine top end service and engine bottom end

service. The manner in which these instructions are used depends upon the tasks to be performed and

the level of disassembly required.

Remove External Assemblies

To prepare the engine for service, whether top or bottom end, first seeSECTION 4 - REMOVE

EXTERNAL ASSEMBLIESto remove the air cleaner, fuel tank, carburetor, etc. The order in which the

topics are presented is the order in which the assemblies are most easily removed from the engine.

NOTE: A few exceptions to this rule do exist, such as the muffler and rewind starter, which may be

serviced without having to remove other external assemblies.

Top End Service

If servicing only cylinder head components, seeSECTION 5 - DISASSEMBLE ENGINE, TOP END

DISASSEMBLY,and then proceed toSECTION 6 - SERVICE ENGINE SUBASSEMBLIES, CYLINDER

HEAD.When cylinder head service is complete, seeSECTION 7 - ASSEMBLE ENGINE, TOP END

ASSEMBLY.

Bottom End Service

If servicing bottom end components, such as the piston, connecting rod, crankshaft, etc., first

seeSECTION 5 - DISASSEMBLE ENGINE, TOP END DISASSEMBLY,and then proceed toBOTTOM

END DISASSEMBLYin the same section. When finished, move toSECTION 6 - SERVICE ENGINE

SUBASSEMBLIES,and seePISTON AND CONNECTING ROD; FLYWHEEL, CRANKSHAFT AND

CAMSHAFT;andCRANKCASE AND CRANKCASE COVER,for all service instructions. When bottom

end service is complete, seeSECTION 7 - ASSEMBLE ENGINE, BOTTOM END ASSEMBLY,and then

proceed toTOP END ASSEMBLYin the same section.

Install External Assemblies

When the top and bottom ends of the engine are assembled, seeSECTION 8 - INSTALL EXTERNAL

ASSEMBLIESto complete the project. The order in which the topics are presented is the order in which

the assemblies are most easily installed on the engine. These instructions also include any cleaning,

inspection, or adjustments that may be recommended.

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SECTION 1 – SAFETY AND GENERAL INFORMATION 1

SECTION 2 – MAINTENANCE 2

SECTION 3 – TROUBLESHOOTING/SPECIAL TOOLS 3

SECTION 4 – REMOVE EXTERNAL ASSEMBLIES 4

SECTION 5 – DISASSEMBLE ENGINE 5

SECTION 6 – SERVICE ENGINE SUBASSEMBLIES 6

SECTION 7 – ASSEMBLE ENGINE 7

SECTION 8 – INSTALL EXTERNAL ASSEMBLIES 8

SECTION 9 – SPECIFICATIONS 9

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SECTION 1 – SAFETY AND GENERAL INFORMATION

SAFETY ------------------------------------------------------------------------------------------------------------------------------------------------ 4

Safety Alert Symbol and Signal Words ---------------------------------------------------------------------------------------------------4

Hazard Symbols and Meanings ------------------------------------------------------------------------------------------------------------ 4

General Safety Messages --------------------------------------------------------------------------------------------------------------------4

GENERAL INFORMATION ------------------------------------------------------------------------------------------------------------------------7

Engine Identification --------------------------------------------------------------------------------------------------------------------------- 7

Fuel Recommendations -----------------------------------------------------------------------------------------------------------------------7

High Altitude ------------------------------------------------------------------------------------------------------------------------------------- 7

Oil Recommendations ------------------------------------------------------------------------------------------------------------------------- 7

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SAFETY

This manual contains safety information that will:

• Make you aware of hazards associated with engines.

• Inform you of the risk of injury associated with those

hazards.

• Instruct you how to avoid or reduce the risk of injury.

Safety Alert Symbol and Signal Words

The safety alert symbol identifies 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,couldresult in minor or moderate injury.

NOTICEindicates information considered important but

not hazard-related.

Hazard Symbols and Meanings

Symbol Meaning Symbol Meaning

Safety information

about hazards that

can result in personal

injury.

Read and understand

the Operator's Manual

before operating or

servicing the unit.

Fire hazard Explosion hazard

Shock hazard Explosion hazard

Hot surface hazard Toxic fume hazard

Amputation hazard -

moving parts

Chemical hazard

Kickback hazard Thrown object hazard -

wear eye protection

Amputation hazard -

entanglement

General Safety Messages

Prior to work, read and understand the section(s) of this

manual that pertain to the job. Follow all safety warnings.

• Always use fresh gasoline. Stale fuel can cause gum

deposits in the carburetor and cause leakage, flow

restrictions, or other problems.

• Check fuel 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 engine and the equipment.

WARNING

Failure to follow instructions could result in serious

injury (including paralysis) and even death.

WARNING

Battery post, terminals, and related accessories contain

lead and lead compounds - chemicals known to the

State of California to cause cancer and reproductive

harm. Wash hands after handling.

WARNING

Certain components in this product and its related

accessories contain chemicals known to the State

of California to cause cancer, birth defects, or other

reproductive harm. Wash hands after handling.

WARNING

Briggs & Stratton Engines are not designed for and are

not to be used to power: fun-karts; go-karts; children's,

recreational, or sport all-terrain vehicles (ATVs);

motorbikes; hovercraft; aircraft products; or vehicles

used in competitive events not sanctioned by Briggs

& Stratton. For information about competitive racing

products, see www.briggsracing.com. For use with

utility and side-by-side ATVs, please contact Briggs &

Stratton Power Application Center, 1-866-927-3349.

Improper engine application may result in serious injury

or 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.

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