Yanmar 3JH4E User manual

JH4

series

SERVICE MANUAL

JH4 Series Service Manual 3JH4E

4JH4AE

4JH4-TE

4JH4-HTE

P/N: 0BJH4-G00102

MARINE

ENGINES

ii JH4 Series Service Manual

This Service Manual has been developed for the exclusive use of service and repair professionals such as

Yanmar authorized Distributors and Yanmar authorized Dealers. It is written with these professionals in

mind and may not contain the necessary detail or safety statements that may be required for a

non-professional to perform the service or repair properly and / or safely. Please contact an authorized

Yanmar repair or service professional before working on your Yanmar product.

Disclaimers:

All information, illustrations and specifications in this manual are based on the latest information available

at the time of publishing. The illustrations used in this manual are intended as representative reference

views only. Moreover, because of our continuous product improvement policy, we may modify information,

illustrations, and / or specifications to explain and / or exemplify a product, service, or maintenance

improvement. We reserve the right to make any change at any time.

Yanmar and are registered trademarks of Yanmar Co., Ltd. in Japan, the United States and /

or other countries.

No part of this publication may be reproduced or used in any form by any means - graphic, electronic, or

mechanical, including photocopying, recording, taping, or information storage and retrieval systems -

without the written permission of Yanmar Marine International.

0707

JH4 Series Service Manual iii

JH4 Series Service Manual

TABLE OF

CONTENTS

Page

Introduction ......................................................................................... 1-1

Safety.................................................................................................... 2-1

General Service Information .............................................................. 3-1

Periodic Maintenance ......................................................................... 4-1

Engine .................................................................................................. 5-1

Fuel System ......................................................................................... 6-1

Cooling System ................................................................................... 7-1

Lubrication........................................................................................... 8-1

Turbocharger....................................................................................... 9-1

Starter Motor...................................................................................... 10-1

Alternator ........................................................................................... 11-1

Electrical ............................................................................................ 12-1

Troubleshooting................................................................................ 13-1

TABLE OF CONTENTS

iv JH4 Series Service Manual

Service Standards.............................................................................. 14-1

JH4 Series Service Manual 1-1

JH4 Series Service Manual Section 1

INTRODUCTION

This manual gives specific instructions for the

proper repair of Yanmar JH4 series marine

engines.

Please follow the procedures carefully to ensure

quality service.

Yanmar recommends that you read this Service

Manual completely before starting repairs.

Along with standard tools, Yanmar recommends the

use of special tools necessary to perform repairs

correctly.

Yanmar products are continuously undergoing

improvement. This Service Manual has been

checked carefully in order to avoid errors. However

Yanmar is not liable for any misrepresentations,

errors of description or omissions. Contact an

authorized Yanmar marine dealer or distributor for

any questions you have regarding this Service

Manual.

Thank you very much

for your reading.

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