Yanmar 4JH3E Specifications Page 1

OPERATION MANUALBe sure to read this manual for safe andproper operation.Store this manual carefully after use.

6 2. PRODUCT EXPLANATION2.2 Engine Specifications2.2.1 4JH3-TEEngine model 4JH3-TEUse Pleasure boatType Vertical water-cooled 4-cycle d

2. PRODUCT EXPLANATION 72.2.2 4JH3-TCEEngine model 4JH3-TCEUse Pleasure boat (Sailing boat)Type Vertical water-cooled 4-cycle diesel eng

8 2. PRODUCT EXPLANATION2.2.3 4JH3-HTEEngine model 4JH3-HTEUse Pleasure boatType Vertical water-cooled 4-cycle diesel engineNo. of cyl.-

2. PRODUCT EXPLANATION 92.2.4 4JH3-DTEEngine model 4JH3-DTEUse Pleasure boatType Vertical water-cooled 4-cycle diesel engineNo. of cyl.-

10 2. PRODUCT EXPLANATION2.3 Names of Parts• Operation Side (Right side as viewed from the propeller.) Contains the main parts necessary

2. PRODUCT EXPLANATION 112.4 Major Servicing PartsName of part FunctionFuel filter Removes dust and water from fuel. The filter is a ca

12 2. PRODUCT EXPLANATION2.5 Operation EquipmentExplanation of the equipment used to operate the engine.2.5.1 Instrument PanelThe instr

2. PRODUCT EXPLANATION 13(1) MetersThe following meters are located in the upper center part of the instrument panel.♦B/C and New B/C typ

14 2. PRODUCT EXPLANATION(3) Starter SwitchThis is the switch for starting engine operation. It is a rotary-type 3-step switch. Positio

2. PRODUCT EXPLANATION 152.5.2 Remote Control HandleThis engine is controlled by the remote control handle located in the cockpit. The

Thank you for purchasing a Yanmar Marine Diesel Engine.[ INTRODUCTION ]• This Operation Manual describes the operation, maintenance and inspection, an

16 2. PRODUCT EXPLANATIONOperation of the handle is as follows:• Starting and stoppingPut the handle in NEUTRAL.This puts the clutch in t

2. PRODUCT EXPLANATION 17 KMH4A (2) Trawling HandleThe trawling control is a single remote control handle.The marine gear trawling lever

18 3. BEFORE OPERATION3. BEFORE OPERATIONPerform items 3.1 – 3.7 before starting to prepare for operation.3.1 Fuel Oil, Lube Oil and Co

3. BEFORE OPERATION 193.1.2 Lube oil(1) Selection of Engine Lube OilUse the following lube oil:*API Classification CD(Standards of Ameri

20 3. BEFORE OPERATION3.2 Supplying FuelFires from Oil Ignition• Be sure to use the correct type of fuel when refueling.Mistakenly filli

3. BEFORE OPERATION 213.3 Supplying Engine Lube OilFill with the specified amount of engine oil.1. Remove the oil inlet cap on the top o

22 3. BEFORE OPERATION3.5 Supplying Cooling WaterBurns from Scalding• Never remove the filler cap of the fresh water cooler while the en

3. BEFORE OPERATION 233.6 CrankingWhen the engine is being used for the first time or if it has not been used for a long period of time,

24 4. HOW TO OPERATE4. HOW TO OPERATEAlcohol• Never operate the engine while you are under the influence of alcohol orwhen you are ill o

4. HOW TO OPERATE 25(4) Checking and Resupplying Marine Gear Oil1. Check the marine gear oil level with the dipstick.2. Supply with the r

INDEXpage No.1 FOR SAFE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.1 Warning Symbol

26 4. HOW TO OPERATE4.2 Checking the Illumination Lamps of the Panel Meters Be sure to check the alarm devi

4. HOW TO OPERATE 274.3 starting4.3.1 Daily StartingFollow the following procedures for starting under nor-mal conditions.1. Open the K

28 4. HOW TO OPERATE4.3.4 After the Engine has Started(1) Warming-up runningAfter the engine has started, let it run for about 5 minutes

4. HOW TO OPERATE 294.5 Clutch Operation for the Marine Gear4.5.1 Forward, Neutral, ReverseUse the remote control handle to operate the

30 4. HOW TO OPERATE4.6 Check During OperationAlways be on the lookout for problems during engine operation.Pay particular attention to

4. HOW TO OPERATE 314.7 Stopping the EngineStop the engine in accordance with the following proce-dures.1. Stop the boat.Put the remote

32 4. HOW TO OPERATE4.8 Operation ProcedureThe following diagram shows the procedures for operation explained up to this point.Parts of

4. HOW TO OPERATE 334.9 Long-Term Storage4.9.1 Before storing for long periods of time, perform the following.(1) Periodic InspectionIf

34 4. HOW TO OPERATE♦♦♦♦Draining the Water From the Fresh Water SystemIf antifreeze has not been added to the fresh cooling water, be sur

5. MAINTENANCE & INSPECTION 355. MAINTENANCE & INSPECTIONConduct Periodic Inspection for Your Safety.The functions of engine com

5 MAINTENANCE & INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355.1 List of Periodic Inspections

36 5. MAINTENANCE & INSPECTION5.1 List of Periodic InspectionsDaily and periodic inspection are important to keep the engine in its

5. MAINTENANCE & INSPECTION 375.2 Periodic Inspection Items5.2.1 Inspection After Initial 50Hrs. Operation(1) Replacing the Engine

38 5. MAINTENANCE & INSPECTION KMH4A KMH4A (2) Replacing the Marine gear Oil and Washing the Oil Filters (1st time)Precautions for

5. MAINTENANCE & INSPECTION 395.2.2 Inspection Every 50 Hours(1) Draining the Fuel Tank1. Put a pan under the drain to catch the fue

40 5. MAINTENANCE & INSPECTION(3) Inspection of BatteryFire due to Electric Short-CircuitsAlways turn off the battery switch or detac

5. MAINTENANCE & INSPECTION 415.2.3 Inspection Every 250 Hrs. or 1 yr.(1) Replacing the Fuel FilterReplace the fuel filter periodica

42 5. MAINTENANCE & INSPECTION(4) Replacing the Marine Gear Oil and Washing the Oil Filter (2nd time)Replace the marine gear oil for

5. MAINTENANCE & INSPECTION 43(5C) Adjusting the Position of the Trawling Remote Control Handle1. Check to see that the trawling leve

44 5. MAINTENANCE & INSPECTION(7) Checking the Tension of the V-Belt of the AlternatorWhen there is not enough tension in the V-belt,

5. MAINTENANCE & INSPECTION 455.2.5 Inspection Every 1000 Hrs. or 4 yrs.(1) Replacing the Marine gear Oil and Washing the Lube Oil F

1. FOR SAFE OPERATION 11. FOR SAFE OPERATIONFollowing the precautions described in this manual will enable you to use this engine withco

46 5. MAINTENANCE & INSPECTION(4) Checking and Replacing the fuel pipe and the cooling water pipeThis maintenance requires specialize

6. TROUBLE AND TROUBLESHOOTING 476. TROUBLE AND TROUBLESHOOTING6.1 Simple problems and the appropriate countermeasuresIf you should enc

48 6. TROUBLE AND TROUBLESHOOTINGTrouble Probable Cause Measure ReferenceStarting FailuresStarter works.but engine does not start.No fuel

6. TROUBLE AND TROUBLESHOOTING 496.2 Emergency Repairs for Marine Gear TroubleIf the marine gear should break, the boat will not run. I

50 6. TROUBLE AND TROUBLESHOOTING6.3 Consulting Your Yanmar Dealer or DistributorRefer difficult problems and repairs to your Yanmar dea

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52 7. SYSTEM DIAGRAM7. SYSTEM DIAGRAM7.1 Wiring diagram7.1.1 B type Instrument Panel (Optional)1/2 (Panel side)Detail ofcoupler AAStar

7. SYSTEM DIAGRAM 532/2 (Engine side)Eng. stopmag. valveAir heaterC.W. temp. senderNot available for B typeC.W. temp. SWEng. oil press. S

54 7. SYSTEM DIAGRAM7.1.2 C type / C type × B type(No.2 station) Instrument Panel (Optional)1/2 (Panel side)HarnessNo.2 stationEng. stop

7. SYSTEM DIAGRAM 552/2 (Engine side)Eng. stopmag. valveeAir heater (Cross sectional area of wire)(Customer)Battery SW Starter motorAlter

2 1. FOR SAFE OPERATION1.2 Safety Precautions(Observe these instructions for your own safety.)Precautions for OperationBurns from Scaldi

56 7. SYSTEM DIAGRAM7.1.3 New B type Instrument Panel (Optional)1/2 (Panel side)Color codingStarter switchDetail of couplerCCDetail of c

7. SYSTEM DIAGRAM 572/2 (Engine side)Eng. stopmag. valveeAir heater (Cross sectional area of wire)(Customer)Battery SW Starter motorAlter

58 7. SYSTEM DIAGRAM7.1.4 New C type / New C type × New B type(No.2 station) Instrument Panel (Optional)1/2 (Panel side)BuzzerChargeC.W.

7. SYSTEM DIAGRAM 592/2 (Engine side)Eng. stopmag. valveeAir heater (Cross sectional area of wire)(Customer)Battery SW Starter motorAlter

4JH3-TE/-TCE/-HTE/-DTE49961-202851Operation ManualModels : Marine Engine Code No.

OVERSEAS OPERATIONS DIVISION1-32, CHAYAMACHI, KITA-KU, OSAKA 530-8311, JAPANTEL : 81-6-6376-6411FAX : 81-6-6377-1242YANMAR DIESEL AMERICA CORP.951

1. FOR SAFE OPERATION 3Alcohol• Never operate the engine while you are under the influence of alcohol orwhen you are ill or feel unwell a

4 1. FOR SAFE OPERATION1.3 Location of Product Safety LabelsTo insure safe operation, product safety labels have been attached. Their l

2. PRODUCT EXPLANATION 52. PRODUCT EXPLANATION2.1 Use & Driving SystemThis is light, compact diesel elngine for use in pleasure boa