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4JH2E Marine

Yanmar 4JH2E · 4JH family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Yanmar 4JH2E is a Yanmar marine diesel in the 4JH2E family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 4JH2E parts book and often sell cheaper through industrial/agricultural channels than under marine dealer pricing. — Yanmar OEM parts catalog in-repo (brands/yanmar/data/extracted/catalogs.csv)

50 hp36.8 kW
1817 ccdisplacement
82×86 mmbore × stroke
4-cylcylinders
217 kgengine dry
1991–1999year range (approx)
NAaspiration
📋 Full specifications 8 🚜 Industrial / tractor base 🔧 Aftermarket 88
Cheaper-part coverage · 5/8
🚜 Base engine ✓🌀 Impeller ✓💧 Raw-water pump🛢️ Oil filter⛽ Fuel filter ✓🌡️ Thermostat ✓➰ Belt ✓⚓ Anode

A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.

Parts by section · 89 assemblies

The exploded parts diagrams for the 4JH2E, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Camshaft & timing gears

Fig 2 — GEAR HOUSINGFig 12 — CAMSHAFT & DRIVING GEAR

Controls

Fig 40 — SPEED REMOTE CONTROL DEVICEFig 56 — SINGLE LEVER CONTROLFig 71 — CONTROL DEVICE

Cooling – fresh water

Fig 23 — COOLING FRESH WATER PUMPFig 24 — COOLING FRESH WATER COOLERFig 28 — COOLING FRESH WATER PIPE

Cooling – sea water

Fig 22 — COOLING SEA WATER PUMPFig 25 — C.S.W.PIPE(4JH2-HTE,DTE,UTE)Fig 25 — COOLING SEA WATER PIPE(4JH2-HTE,DTE,UTE)Fig 26 — C.S.W.PIPE(4JH2E)Fig 26 — COOLING SEA WATER PIPE(4JH2E)Fig 27 — C.S.W.PIPE(4JH2-TE)Fig 27 — COOLING SEA WATER PIPE(4JH2-TE)Fig 50 — SEA WATER FILTER

Crankshaft & flywheel

Fig 3 — FLYWHEEL HOUSINGFig 17 — CRANKSHAFT & FLYWHEEL

Cylinder block

Fig 1 — CYLINDER BLOCK

Cylinder head & valves

Fig 7 — CYLINDER HEAD

Electrical & instruments

Fig 39 — ENGINE STOP& COLD START DEVICEFig 39 — ENGINE STOP & COLD START DEVICEFig 41 — STARTING MOTORFig 44 — WIRE HARNESS & SENSOR(4JH2-UTEFig 44 — WIRE HARNESS & SENSOR(4JH2-UTE)Fig 49 — ELECTRIC BILGE PUMP(12V)Fig 52 — ENGINE STOP DEVICEFig 53 — WIRE HARNESS & SENSOR(B-2 TYPEFig 53 — WIRE HARNESS & SENSOR(B-2 TYPE)Fig 54 — WIRE HARNESS & SENSOR(C,D,E TYFig 54 — WIRE HARNESS & SENSOR(C,D,E TYPE)Fig 57 — INSTRUMENT PANEL(B-2 TYPE)Fig 58 — INSTRUMENT PANEL(C-TYPE)Fig 59 — INSTRUMENT PANEL(D-TYPE)Fig 60 — INSTRUMENT PANEL(E-TYPE)Fig 93 — (57A)INSTRUMENT PANEL(B-TYPE,NEW)Fig 94 — (58A)INSTRUMENT PANEL(C-TYPE,NEW)Fig 95 — (59A)INSTRUMENT PANEL(D-TYPE,NEW)

Fuel injection pump & governor

Fig 29 — F.I.PUMP(4JH2-TE,HTE,DTE)Fig 29 — FUEL INJECTION PUMP(4JH2-TE,HTE,DTE)Fig 30 — FUEL INJECTION PUMP(4JH2E)Fig 31 — FUEL INJECTION PUMP(4JH2-UTE)Fig 34 — TIMER(4JH2-E,DTE)Fig 37 — GOVERNOR(4JH2-TE,HTE,DTE)Fig 38 — GOVERNOR(4JH2E)

Fuel lines, tank & filter

Fig 32 — F.I.PIPE(4JH2-E,TE,HTE,DTE)Fig 32 — FUEL INJECTION PIPE(4JH2-E,TE,HTE,DTE)Fig 33 — FUEL INJECTION PIPE(4JH2-UTE)Fig 35 — FUEL PIPE(4JH2-E,TE,HTE,DTE)Fig 36 — FUEL PIPE(4JH2-UTE)Fig 51 — FUEL TANK

Gaskets, kits & spare parts

Fig 46 — SPARE PARTFig 62 — GASKET SETFig 63 — REEQUIP MENT KIT

Generator (genset)

Fig 42 — GENERATOR

Intake and Exhaust

Fig 9 — SUCTION MANIFOLD(4JH2E)Fig 10 — SUCTION MANIFOLD(4JH2-TE)Fig 11 — SUCTION MANIFOLD(4JH2HT,DT,UTEFig 11 — SUCTION MANIFOLD(4JH2-HTE,DTE,UTE)Fig 13 — MIXING ELBOWFig 14 — TURBOCHARGERFig 15 — AIR COOLER(4JH2-HTE)Fig 16 — AIR COOLER(4JH2-DTE,UTE)Fig 61 — REPAIR SET

Lubricating

Fig 4 — LUB. OIL SUMPFig 8 — BONNET & BREATHERFig 19 — LUB.OIL COOLERFig 20 — LUB. OIL SYSTEMFig 21 — LUB. OIL LINEFig 70 — LUB. OIL COOLER

Mounting

Fig 6 — MOUNTING FOOT

Pistons, rods & liners

Fig 18 — PISTON & CONNECTING ROD

Tools & labels

Fig 5 — LABELFig 45 — TOOLFig 72 — TOOL(OPTIONAL)

Transmission & drive

Fig 43 — CLUTCH REMOTE CONTROLFig 43 — CLUTCH REMOTE CONTROL(KBW20 & KBW21)Fig 55 — COUPLINGFig 64 — CLUTCH ASSY(KM4A)Fig 65 — CLUTCH HOUSINGFig 66 — INPUT SHAFTFig 67 — CLUTCH SHAFTFig 68 — COUNTER SHAFTFig 69 — OUT PUT SHAFTFig 73 — CLUTCH ASSY(KBW20)Fig 77 — OUTPUT SHAFTFig 80 — CLUTCH ASSY(KBW21)Fig 87 — CLUTCH ASSY(KM3P2)Fig 89 — INPUT SHAFT & COUNTER SHAFT
📚 Manuals & Sources
Specs— none yet
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List— none yet
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Category
Marine
Engine family
4JH
Year range (approx)
1991–1999
Cylinders
4
Rated output
50 hp (36.8 kW)
Bore × stroke
82 × 86 mm
Displacement
1817 cc
Max rpm
3600
Continuous rpm
3500
Aspiration
Naturally aspirated
Dry weight (engine)
217 kg

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