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4JHE Marine

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

🚜 Base engine confirmed

The Yanmar 4JHE is a Yanmar marine diesel in the 4JHE family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 4JHE 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)

44 hp32.4 kW
1817 ccdisplacement
82×86 mmbore × stroke
4-cylcylinders
1986–1991year range (approx)
NAaspiration

re-keyed from KBW-20; bore/stroke verify

📋 Full specifications 🚜 Industrial / tractor base 🔧 Aftermarket 65
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 · 85 assemblies

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

Bilge & accessory pumps

Fig 73 — BILGE PUMP 12V

Camshaft & timing gears

Fig 2 — GEARS HOUSINGFig 20 — CAMSHAFTFig 28 — IDLE GEAR

Controls

Fig 57 — SPEED REMOTE CONTROL DEVICEFig 84 — SINGLE LEVER CONTROLFig 85 — MORSE CABLEFig 99 — CONTROL DEVICE

Cooling – fresh water

Fig 38 — COOLING FRESH WATER PUMPFig 39 — COOLING FRESH WATER COOLERFig 42 — COOLING FRESH WATER PIPEFig 43 — THERMOSTAT

Cooling – sea water

Fig 37 — COOLING SEA WATER PUMPFig 40 — COOLING SEA WATER PIPEFig 74 — KINGSTON COCKFig 75 — SEA WATER FILTER

Crankshaft & flywheel

Fig 3 — FLYWHEEL HOUSINGFig 23 — CRANKSHAFTFig 24 — FLYWHEEL

Cylinder block

Fig 1 — CYLINDER BLOCK

Cylinder head & valves

Fig 13 — CYLINDER HEAD (OLD TYPE)Fig 14 — CYLINDER HEAD (NEW TYPE)Fig 15 — BONNET

Electrical & instruments

Fig 56 — ENGINE STOP DEVICEFig 58 — STARTING MOTORFig 67 — STARTING MOTOR COMPONENT PARTSFig 77 — ENGINE STOP CABLEFig 78 — BATTERY SWITCHFig 79 — WIRE HARNESS(FOR B2 TYPE PANELFig 80 — WIRE HARNESS (FOR C,D PANEL)Fig 89 — INSTRUMENT PANEL (B-2 TYPE)Fig 90 — INSTRUMENT PANEL (C TYPE)Fig 91 — INSTRUMENT PANEL (D TYPE)Fig 93 — REMOTE CONTROL WIRE

Fuel injection pump & governor

Fig 44 — FUEL INJECTION PUMPFig 48 — TIMERFig 49 — TIMER & FUEL PUMP DRIVING GEARFig 54 — GOVERNOR

Fuel injectors & nozzles

Fig 46 — FUEL INJECTION VALVE

Fuel lines, tank & filter

Fig 45 — FUEL OIL PUMPFig 50 — FUEL STRAINERFig 51 — FUEL INJECTION PIPEFig 52 — FUEL PIPEFig 53 — FUEL RETURN PIPEFig 76 — FUEL TANK

Gaskets, kits & spare parts

Fig 63 — SPARE PARTSFig 64 — GASKET KIT

Generator (genset)

Fig 59 — GENERATORFig 68 — GENERATOR COMPONENT PARTS

Intake and Exhaust

Fig 16 — SUCTION MANIFOLDFig 18 — MIXING ELBOWFig 22 — TURBO CHARGERFig 32 — LUB.OIL SUCTION PIPEFig 65 — TURBINE(INNER PARTS)(OLD TYPE)Fig 66 — TURBINE(INNER PARTS)(NEW TYPE)Fig 72 — OIL SUCTION/DRAIN PUMPFig 81 — AIR HEATERFig 94 — REPAIR SET

Lubricating

Fig 4 — LUB. OIL SUMPFig 8 — BREATHERFig 29 — LUB.OIL PUMPFig 30 — LUB.OIL COOLERFig 31 — LUB.OIL DIPSTICKFig 33 — LUB.OIL STRAINERFig 34 — LUB.OIL PIPE

Mounting

Fig 11 — ENGINE LIFTERFig 12 — ENGINE BRACKET

Pistons, rods & liners

Fig 6 — MAIN BEARINGFig 7 — CAMSHAFT BEARINGFig 25 — PISTONFig 27 — CONNECTING RODFig 36 — PISTON JET

Tools & labels

Fig 10 — LABELSFig 62 — TOOLSFig 100 — TOOLS (OPTIONAL PARTS)

Transmission & drive

Fig 60 — CLUTCH (KBW-20)Fig 61 — CLUTCH REMOTE CONTROLFig 86 — SOLIDE COUPLINGFig 87 — STRAIGHT COUPLINGFig 88 — SLIT COUPLINGFig 92 — EXTENSION WIREFig 95 — CLUTCH HOUSINGFig 96 — INPUT SHAFTFig 97 — COUNTER SHAFTFig 98 — OUTPUT 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
4JHE
Year range (approx)
1986–1991
Cylinders
4
Rated output
44 hp (32.4 kW)
Bore × stroke
82 × 86 mm
Displacement
1817 cc
Max rpm
3600
Continuous rpm
3500
Aspiration
Naturally aspirated