Details

The Yanmar 4JH57 is a 57hp (41.9kW) inline, 4-cylinder, common rail diesel engine with a displacement of 2.19L, natural aspiration, and a max speed of 3000 RPM, featuring electronic controls, freshwater cooling, and meeting strict emission standards (EPA Tier 3/RCD 2). Typical gearbox pairings, like the Yanmar KM35P or KM4A, provide reductions for propulsion, with common options including mechanical controls or optional electronic monitoring (VC10/VC20). 

Key Engine Specs:

• Power: 57 mhp / 41.9 kW @ 3000 RPM
• Cylinders: 4, In-line
• Displacement: 2.19 L (134 cu in)
• Aspiration: Natural
• Combustion: Bosch Common Rail System, Direct Injection
• Cooling: Fresh Water (with sea water pump)
• Alternator: 12V - 125A
• Weight (Dry, w/o gear): Approx. 220 kg (485 lbs)
• Emissions: EPA Tier 3, EU RCD 2, BSO II 

Gearbox Options (Examples):

• KM35P: A common pairing, often with a specific ratio like 2.14:1.
• KM4A: Another popular choice with specific reduction ratios.
• Type: Mechanical (standard), with electronic controls (VC10/VC20) available. 

Features:

• Electronic engine management.
• HVO fuel approved, ensuring compatibility with sustainable fuels.
• Digital instrument panel (YD25) available. 

Typical Application:

• Designed as a reliable, fuel-efficient power source for sailing yachts and smaller powerboats.