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4JH80 Marine

Yanmar 4JH80 · 4JH family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Yanmar 4JH80 is a Yanmar marine diesel in the 4JH80 family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 4JH80 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)

80 hp58.8 kW
2000 ccdisplacement
84×90 mmbore × stroke
4-cylcylinders
229 kgengine dry
28.5 kggearbox
from 2013year range (approx)
Turbo + ICaspiration

common-rail turbo+IC; max-only rating (Yanmar 4JH80 datasheet)

📋 Full specifications 15 🚜 Industrial / tractor base 🔧 Aftermarket 42
Cheaper-part coverage · 4/8
🚜 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.

Second Alternator OEM option

The OEM parts book lists a factory second / extra alternator option for the 4JH80 — not standard equipment. Use the kit or hardware below when fitting a house-bank / domestic alternator.

Fig 48 — ALTERNATOR KIT(2ND)(OPTIONAL)Fig 70 — (48A)ALTERNATOR KIT(2ND)(ISOLATED TYPE)(OPTIONAL)
Part No.DescriptionIn figure
129677-77600 ALTERNATOR KIT, JHCR Fig 48 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77630 BRACKET, 2ND Fig 48 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77640 ALTERNATOR KIT,ISOLA Fig 70 — (48A)ALTERNATOR KIT(2ND)(ISOLATED TYPE)(OPTIONAL)
129677-77670 HARNESS, 2ND ALT 12V Fig 48 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77680 HARNESS, 2ND ALT 24V Fig 48 — ALTERNATOR KIT(2ND)(OPTIONAL)

Parts by section · 90 assemblies

The exploded parts diagrams for the 4JH80, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Belts & pulleys

Fig 8 — COVER(BELT)

Camshaft & timing gears

Fig 2 — GEAR HOUSINGFig 16 — CAMSHAFT & DRIVING GEAR

Controls

Fig 64 — REMOTE CONTROL CABLE(OPTIONAL)

Cooling – fresh water

Fig 18 — INTER COOLERFig 29 — COOLING PUMP(FRESH WATER)Fig 30 — COOLER(FRESH WATER)Fig 37 — COOLING PIPE(FRESH WATER)Fig 38 — HOT WATER CONNECTION(OPTIONAL)

Cooling – sea water

Fig 25 — COOLING PUMP(SEA WATER)(FRONT MOUNT SPEC.)Fig 26 — COOLING PUMP(SEA WATER)(REAR MOUNT SPEC.)Fig 27 — COOLING PUMP(SEA WATER)(INNER PARTS)(FRONT MOUNT SPEC.)Fig 28 — COOLING PUMP(SEA WATER)(INNER PARTS)(REAR MOUNT SPEC.)Fig 31 — COOLING PIPE(SEA WATER)(MIXING ELBOW)Fig 32 — COOLING PIPE(SEA WATER)(FOR SD60, CLUTCHLESS)Fig 33 — COOLING PIPE(SEA WATER)(FOR KMH4A)Fig 34 — COOLING PIPE(SEA WATER)(FOR KM4A2)Fig 35 — COOLING PIPE(SEA WATER)(FOR ZF25, ZF25A)Fig 36 — COOLING PIPE(SEA WATER)(FOR ZF30M)Fig 62 — SEA WATER PUMP INLET JOINT(OPTIONAL)

Crankshaft & flywheel

Fig 3 — FLYWHEEL HOUSINGFig 20 — CRANKSHAFT & FLYWHEEL

Cylinder block

Fig 1 — CYLINDER BLOCKFig 9 — COVER(ENGINE)

Cylinder head & valves

Fig 10 — CYLINDER HEADFig 11 — BONNETFig 63 — REMOTE CONTROL HEAD(OPTIONAL)

Electrical & instruments

Fig 44 — ELECTRONIC CONTROL UNIT(ECU) & BRACKETFig 45 — STARTER MOTORFig 46 — RELAYFig 47 — ALTERNATOR(EARTH TYPE)Fig 49 — WIRE HARNESSFig 54 — EMERGENCY STOP SWITCHFig 55 — INSTRUMENT PANEL(B25)(MEDALLION)Fig 56 — INSTRUMENT PANEL(C35)(MEDALLION)Fig 57 — (54A)SENSOR(THROTTLE)(FOR A15, B25, C35 PANEL)Fig 58 — EMERGENCY STOP SWITCH(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 66 — (51A)SHIFT HARNESS(FOR ZF25, ZF25A SOLENOID SHIFT)Fig 69 — (47A)ALTERNATOR(EARTH FLOAT TYPE REMODEL KIT)(OPTIONAL)Fig 71 — (48B)ALTERNATOR(INNER PARTS)Fig 72 — (48C)ALTERNATOR(INNER PARTS)(ISOLATED TYPE)Fig 77 — (54C)INSTRUMENT PANEL(A15)(MEDALLION)Fig 78 — (58A)DISPLAY(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 79 — (58B)CAN CONVERTOR(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 80 — (58C)VC10(SINGLE ENGINE)(OPTIONAL)Fig 81 — (58D)VC10(TWIN ENGINE)(OPTIONAL)Fig 82 — (58E)VC10(DISPLAY & PANEL)(INNER PARTS)Fig 91 — DISPLAY(YD42)Fig 92 — DISPLAY(YD25)

Fuel injectors & nozzles

Fig 40 — FUEL INJECTION VALVE & FUEL INJECTION PIPE

Fuel lines, tank & filter

Fig 39 — FUEL SUPPLY PUMPFig 41 — FUEL FILTERFig 42 — FUEL PRE-FILTER(HULL SIDE)Fig 43 — FUEL PIPEFig 68 — (42A)FUEL COOLER(HULL SIDE)(OPTIONAL)

Intake and Exhaust

Fig 12 — SUCTION MANIFOLDFig 13 — AIR INTAKE SILENCERFig 14 — MIXING ELBOW(L TYPE)Fig 15 — MIXING ELBOW(U TYPE)Fig 17 — TURBINEFig 19 — AIR DUCT

Lubricating

Fig 4 — OIL SUMPFig 5 — BREATHERFig 22 — LUB. OIL SYSTEMFig 23 — LUB. OIL PIPEFig 24 — DIPSTICKFig 67 — (22A)LUB. OIL COOLER(FOR KMH50V)Fig 90 — (5A)BREATHER(SOLAS SPEC.)(OPTIONAL)

Mounting

Fig 7 — MOUNTING FOOTFig 85 — (60B)FLEXIBLE MOUNT(FOR SD60)Fig 86 — (60C)FLEXIBLE MOUNT(FOR KMH50V)

Other / general

Fig 65 — (9A)COVER(SERVICE)(OPTIONAL)

Pistons, rods & liners

Fig 21 — PISTON & CONNECTING ROD

Tools & labels

Fig 6 — LABELFig 59 — (61A)TOOLFig 61 — LABEL(SAFETY)(BUNDLED ITEMS)

Transmission & drive

Fig 50 — (54B)TERMINAL ADAPTER & EXTENSION HARNESS(FOR A15, B25, C35 PANEL)Fig 51 — CLUTCH(OPTIONAL)Fig 52 — DAMPER DISC(OPTIONAL)Fig 53 — ELECTRIC PARTS(FOR SD60, S2 DRIVE)Fig 60 — FLEXIBLE MOUNT(FOR S2 DRIVE)Fig 73 — (52A)TROLLING VALVE(A2)(FOR KMH4A)(OPTIONAL)Fig 74 — (52B)COUPLING(FOR KMH50V)Fig 75 — (52C)S2 DRIVEFig 76 — (53A)PROPELLER NUT(FOR SD60)(OPTIONAL)Fig 83 — (58F)CAP(THROTTLE CONNECTOR)(FOR VC10, S2 DRIVE)Fig 84 — (60A)FLEXIBLE MOUNT(FOR KM4A2, KMH4A, ZF, CLUTCHLESS)Fig 87 — (60D)WIRE HARNESS(FOR S2 DRIVE)Fig 88 — (60E)EXTENSION HARNESS(FOR S2 DRIVE)(OPTIONAL)Fig 89 — (60F)SUPPORT(FLYWHEEL HOUSING)(FOR S2 DRIVE)
📚 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)
from 2013
Cylinders
4
Rated output
80 hp (58.8 kW)
Bore × stroke
84 × 90 mm
Displacement
2000 cc
Max rpm
3200
Continuous rpm
3200
Aspiration
Turbocharged + intercooled
Dry weight (engine)
229 kg
Gearbox
28.5 kg
With standard gearbox
257.5 kg

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