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4JH57 Marine

Yanmar 4JH57 · 4JH family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Yanmar 4JH57 is a Yanmar marine diesel in the 4JH45 family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 4JH45 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)

57 hp41.9 kW
2190 ccdisplacement
88×90 mmbore × stroke
4-cylcylinders
220 kgengine dry
12 kggearbox
from 2018year range (approx)
NAaspiration

common-rail NA; max-only rating (Yanmar 4JH45/57 datasheet)

📋 Full specifications 15 🚜 Industrial / tractor base 🔧 Aftermarket 34
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 4JH57 — not standard equipment. Use the kit or hardware below when fitting a house-bank / domestic alternator.

Fig 39 — ALTERNATOR KIT(2ND)(OPTIONAL)Fig 60 — (39A)ALTERNATOR KIT(2ND)(ISOLATED TYPE)(OPTIONAL)
Part No.DescriptionIn figure
129677-77600 ALTERNATOR KIT, JHCR Fig 39 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77630 BRACKET, 2ND Fig 39 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77640 ALTERNATOR KIT,ISOLA Fig 60 — (39A)ALTERNATOR KIT(2ND)(ISOLATED TYPE)(OPTIONAL)
129677-77670 HARNESS, 2ND ALT 12V Fig 39 — ALTERNATOR KIT(2ND)(OPTIONAL)
129677-77680 HARNESS, 2ND ALT 24V Fig 39 — ALTERNATOR KIT(2ND)(OPTIONAL)

Parts by section · 74 assemblies

The exploded parts diagrams for the 4JH57, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Belts & pulleys

Fig 8 — COVER(BELT)Fig 23 — V-BELT

Camshaft & timing gears

Fig 2 — GEAR HOUSINGFig 16 — CAMSHAFT & DRIVING GEAR

Controls

Fig 53 — REMOTE CONTROL CABLE(OPTIONAL)

Cooling – fresh water

Fig 22 — COOLING PUMP(FRESH WATER)Fig 24 — COOLER(FRESH WATER)Fig 28 — COOLING PIPE(FRESH WATER)Fig 29 — HOT WATER CONNECTION(OPTIONAL)

Cooling – sea water

Fig 21 — COOLING PUMP(SEA WATER)Fig 25 — COOLING PIPE(SEA WATER)(FOR KM35A2, KM35P, SD60, CLUTCHLESS)Fig 26 — COOLING PIPE(SEA WATER)(FOR ZF30M)Fig 27 — COOLING PIPE(SEA WATER)(FOR KM4A1)Fig 57 — (25A)COOLING PIPE(SEA WATER)(FOR ZF25, ZF25A)

Crankshaft & flywheel

Fig 3 — FLYWHEEL HOUSINGFig 17 — CRANKSHAFT & FLYWHEEL

Cylinder block

Fig 1 — CYLINDER BLOCKFig 9 — COVER(ENGINE)

Cylinder head & valves

Fig 10 — CYLINDER HEADFig 11 — BONNETFig 52 — REMOTE CONTROL HEAD(OPTIONAL)Fig 76 — CONTROL HEAD KIT

Electrical & instruments

Fig 35 — ELECTRONIC CONTROL UNIT(ECU) & BRACKETFig 36 — STARTER MOTORFig 37 — RELAYFig 38 — ALTERNATOR(EARTH TYPE)Fig 40 — WIRE HARNESSFig 44 — ELECTRIC PARTS(FOR SD60)Fig 45 — EMERGENCY STOP SWITCHFig 46 — INSTRUMENT PANEL(B25)(MEDALLION)Fig 47 — INSTRUMENT PANEL(C35)(MEDALLION)Fig 48 — (45A)SENSOR(THROTTLE)(FOR A15, B25, C35 PANEL)Fig 49 — EMERGENCY STOP SWITCH(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 56 — (42A)SHIFT HARNESS(FOR ZF25, ZF25A SOLENOID SHIFT)Fig 59 — (38A)ALTERNATOR(EARTH FLOAT TYPE REMODEL KIT)(OPTIONAL)Fig 61 — (39B)ALTERNATOR(INNER PARTS)Fig 62 — (39C)ALTERNATOR(INNER PARTS)(ISOLATED TYPE)Fig 64 — (45C)INSTRUMENT PANEL(A15)(MEDALLION)Fig 65 — (49A)DISPLAY(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 66 — (49B)CAN CONVERTOR(FOR A15, B25, C35 PANEL)(OPTIONAL)Fig 67 — (49C)VC10(SINGLE ENGINE)(OPTIONAL)Fig 68 — (49D)VC10(TWIN ENGINE)(OPTIONAL)Fig 69 — (49E)VC10(DISPLAY & PANEL)(INNER PARTS)Fig 70 — (49F)CAP(THROTTLE CONNECTOR)(FOR VC10)Fig 74 — DISPLAY(YD42)Fig 75 — DISPLAY(YD25)

Fuel injectors & nozzles

Fig 31 — FUEL INJECTION VALVE & FUEL INJECTION PIPE

Fuel lines, tank & filter

Fig 30 — FUEL SUPPLY PUMPFig 32 — FUEL FILTERFig 33 — FUEL PRE-FILTER(HULL SIDE)Fig 34 — FUEL PIPEFig 58 — (33A)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 55 — (15A)MIXING ELBOW(L TYPE)(FOR BJT)

Lubricating

Fig 4 — OIL SUMPFig 5 — BREATHERFig 19 — LUB. OIL SYSTEMFig 20 — DIPSTICKFig 73 — (5A)BREATHER(SOLAS SPEC.)(OPTIONAL)

Mounting

Fig 7 — MOUNTING FOOTFig 72 — (49H)FLEXIBLE MOUNT(FOR SD60)

Other / general

Fig 54 — (9A)COVER(SERVICE)(OPTIONAL)

Pistons, rods & liners

Fig 18 — PISTON & CONNECTING ROD

Tools & labels

Fig 6 — LABELFig 50 — (51A)TOOLFig 51 — LABEL(SAFETY)(BUNDLED ITEMS)

Transmission & drive

Fig 41 — (45B)TERMINAL ADAPTER & EXTENSION HARNESS(FOR A15, B25, C35Fig 42 — CLUTCH(OPTIONAL)Fig 43 — DAMPER DISC(OPTIONAL)Fig 63 — (44A)PROPELLER NUT(FOR SD60)(OPTIONAL)Fig 71 — (49G)FLEXIBLE MOUNT(FOR KM4A1, KM35A2, KM35P, ZF, CLUTCHLESS)
📚 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 2018
Cylinders
4
Rated output
57 hp (41.9 kW)
Bore × stroke
88 × 90 mm
Displacement
2190 cc
Max rpm
3000
Continuous rpm
3000
Aspiration
Naturally aspirated
Dry weight (engine)
220 kg
Gearbox
12 kg
With standard gearbox
232 kg

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