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4JH80 Yanmar

Yanmar Ref. 4JH80
Last edited by
BO 2026-10-22 11:28
1 contributor · 1 edit
BO
Sources · 2 cited
[Web] Yanmar JH Series Operation Manual (3JH40/4JH45/4JH57/4JH80/4JH110) - specifications and periodic maintenance schedule [Web] Yanmar Marine 4JH80 product page See all →
The Yanmar 4JH80 is a four-cylinder, turbocharged and intercooled marine diesel from Yanmar's JH common rail series, rated 58.8 kW (80 mhp) at 3200 rpm at the crankshaft (56.4 kW / 76.7 mhp at the propeller shaft) from 1.995 L (84 x 90 mm bore x stroke). It uses direct injection with an electronically controlled Bosch common-rail system (up to 160 MPa), freshwater cooling via heat exchanger, a 12V 1.4 kW starter and a 12V 125A alternator. It is offered with ZF30M, ZF25, ZF25A, KM4A2, KMH4A or KMH50V (V-drive) marine gears, the SD60-4 saildrive, or bobtail, and is certified to RCD 2, BSO II, EPA Tier 3 and EPA Tier 3C. Dry weight 229 kg (bobtail), 254 kg with ZF30M.

Characteristics

Hover any value for notes and sources
Horse Power
80 Hp
Torque
— Nm
Torque
Light Duty / High Output / Pleasure Duty
Weight
229KG
Number of Cylinders
4
Cylinder Layout
inline
Displacement litres
1.995Liter
Is Injection
Yes
Has a Turbo
Yes
Block Material
—
Cooling System
Water-cooled
Compression Ratio
—
Starter Type
Electric
RPM Range
3200
Emission Standard
EPA Tier 3–Other Regional Standard
Dimensions
92.5cm  × 61.3cm  × 67.5cm
Certifications
RCD

Sources

2 cited
[1]
Yanmar JH Series Operation Manual (3JH40/4JH45/4JH57/4JH80/4JH110) - specifications and periodic maintenance schedule
Web
[2]
Yanmar Marine 4JH80 product page
Web

Maintenance schedule

15 tasks · 8 intervals
Task After 50h Daily Every 1mo Every 1yr Every 4yr Every 50h Every 250h Every 1000h
Change Change Gearbox Oil
Change Change Oil
Change Change Oil Filter
Inspect Inspect belt tension & Inspect belts for wear and tears
Inspect Check the shaft alignement
Mechanical Check & Adjust valve clearances
Inspect Inspect coolant levels & state
Inspect Check for water in fuel filter
Change Flush/Change coolant
Change Change Fuel Filter
Inspect Inspect air filter
Inspect Check cable connections
Inspect Inspect Exhaust System
Inspect Inspect turbocharger visually
Change Change Raw water impellar