J MARINE DIESEL ENGINE MODELS: 2GM20(F)M(C) , 3GM30(F)M(C) EPA Certified Engine It meets the low emission standards set by the EPA OPERATION MANUAL California Proposition 65 Warning Diesel engine exhaust and some of its constituents are recognized by the State of California to cause cancer, birth defects, and other reproductive harm.

Page 1

02

Contents CONTENTS INTRODUCTION ............................................... 3 3.3.4 Cautions during Operation ...... 30 3.3.5 Stopping th e Engine ............... 30 1 FOR YOUR SAFETY ................................... .4 3.4 Long term Storage ............................ 32 1 .1 Warning symbols ................................ .4 1 .2 Safety Precautions ............................. .4 1.3 Warning Labels ................................... ? 4 MAINTENANCE & INSP ECnO N ............... 34 4.1 General Inspection Ru l es .................. 34 4.2 Li st of Periodic Inspection lt ems ....... 35 2 PRODUCT EXPLANATION ..........................

8 4.3 Periodic Inspection ltems .................. 37 2.1 Use, Driving System etc ...................... 8 4.3.1 Inspection on Initial 50 Hrs. of 2.2 Engine Specif i cations .......................... 9 Ope ration (or after 1 month) .... 37 2.3 N ames of Parts .................................. 15 4.3.2 Inspection Every 50 H ours 2.4 Major Servicing Parts ........................ 16 (or monthl y) ............................. 37 2.5 Control Equipment ............................ 17 4.3.3 Inspection Every 150 Hr s ........ 39 2 .5.1 Control Panel ....... .. ................. 17 4. 3.4 Inspecti on Every 300 Hrs ........ 39 2.5.2 Single Lever Remote 4.3.5 Inspecti on Every 600 Hrs ........

40 Control Handle .............. .. ........ 19 4.4 EPA Requirements ........................... .41 2.5.3 Stopping Equipment ............... 19 4.4.1 EPA Certifi ca tion Plate ............ 41 2.5.4 Decompression Equipment... .. 19 4.4.2 Conditions to Insure Compliance with Emission 3 OPERATION .............................................. 20 Standards ............................... .42 3.1 Fuel Oi l, Lube Oil & Cooling Water .... 20 4.4.3 Inspection and Maintenance ... 44 3.1.1 Fuel O il ............................... .. ... 20 4.4.4 Emission System Warranty 3.1.2 Lube Oil ................................... 21 Statement ................................

44 3.1.3 Cooling Water ......................... 21 3.2 Before Initial Operation ..................... 22 5 TROUBLE AND TROUBLESHOOTING .... .45 3.2.1 Supply Fuel 011 ........................ 22 3.2.2 Supply Engine Lube 011 ........... 22 6 PIPING DIAGRAMS .................................. .48 3.2.3 Supply C lu tch Lube Oil ........... 23 3.2.4 Supply Cooling Water ............. 23 7 WIRING DIAGRAMS .................................. 50 3.2.5 Cranking (Idling) ...................... 24 3.2.6 Check and Resupply Lube APPENDIX A (Piping diagrams) ..................... A-1 Oil and Coo li ng Water ............. 25 (See the b ack of this Manual) APPENDIX B (Piping diagrams) ....................

B -1 3.3 Operating your Engine ...................... 25 (See the back of this Manual) 3.3.1 I nspec ti on Before Starting ...... 26 3.3.2 How to Start the Engine .......... 27 3.3.3 Operation ................................ 29 2

Page 2

03

Introduction Thank you for purcha si ng a YANMAR Mar ine Diesel Engine. This Operation Manual describes the operation. maintenance and inspection of the 2GM20(F)M(C), 3GM30(F)M(C) Yanmar Marine Diesel Engines. Read this Operation Manual carefully before operating the engine to ensure that it is used correctly and that it stays in the best possible condition. Keep this Operation Manual in a convenient place for easy access. If this Operation Manual is lost or damaged, order a new one from your dealer or distributor. Make sure this manual is transfered to subsequent owners. It should be considered as a permanent part of the engine and remain so.

Constant efforts are made to improve the quality and performance of Yanmar products, so some details included in this Operation Manual may differ slightly from your engine. If you have any questions about this, please contact your Yanmar dealer or distributor. The marine gear described in this manual is Yanmar Model KM Series. With regard to the sail drive, this manual describes lube oil selection and specification only. Please read the Sail Drive Operation Manual, wh ich is supplied with the Sail Drive Unit, for further information. 3 - Operation Manual (Marine Engine) Models 2GM20(F)M(C), 3GM30(F)M(C) Code. No. 499611 - 00680

Page 3

04

1. For your safety 1.1 WARNING SYMB OLS Most operation, maintenance and inspection problems arise due to users' failure to comply with the rules and precaut1ons for safe operation described in this operation manual. Often, users do not understand or recognize the signs of approaching problems. Improper handling can cause burns and other injuries and can result in death. Be sure to read this operation manual carefully before operating the engine and observe all of the instructions and precautions described in this manual. Below follow the warning signs used in this manual. Pay special attention to parts containing these words and signs.

A DANGER DANGER indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury. A WARNING WARNING indicates a potentially hazardous situa- tion which, if not avoided, COULD result in death or serious injury. CAUTION indicates a potentially hazardous situa- tion which, if not avoided, may result in minor or moderate injury. ' A CAUTION This sign is also be used to alert against unsafe practices. The descriptions captioned by are particularly important cautions for handling. If you ignore them, the performance of your machine may deteriorate leading to problems.

1.2 SAFETY PRECAUTIONS (Observe these instructions for your own safety!) Pr ec aution s for Op erat io n A DANGER Filler Cap of Fr es h Wate r Tank Never open the cap of the fresh water tank while the engine is still hot. Steam and hot water will spurt out and burn you seriously. Wait until the temperature of the fresh water tank has dropped , wrap a cloth around the filler cap and loosen the cap slowly. After inspection, refasten the cap firmly. 4

Page 4