Products
 

4JH3-BE DIESEL ENGINE

Lightweight

Compact design iron block and head feature close spaced cylinders to save space and weight. Extensive use of aluminum alloys in oil pan, covers, and many parts make for good weight savings.

User Friendly

Sophisticated engine mounts, a range of velvet smooth transmissions, micron precise fuel system components, close attention to bearing tolerances and accurate balance of moving parts make for low noise, low vibration, low emission, low downtime and easy to live with engines.

Clean
Inlet swirl design improves fuel-air mix, extra high pressure fuel injection system with micron precision injectors and close attention to coolant flow minimizes hot and cool spots -- these are just some of the ways Yanmar improves combustion efficiency. Exhaust gas emissions clear the strict European BSO regulations.

Thrifty

Diesels are synonymous with fuel economy. But being a Yanmar also means that long years of experience in building some of the worlds most efficient diesels, also the extensive input from our large and ultra-modern research facilities have been incorporated into every new Yanmar engine.

Reliable
Long, trouble-free engine life is a common reason for choosing Yanmar. Worldwide parts backup and quick response times make for minimum downtime. These engines are again and again the favoured choice of bluewater yachtsman and boat owners the world over.

 
 
Model
4JH3-BE
Configuration
4-stroke, vertical, water-cooled diesel engine
Number of cylinders
4 in-line
Bore x stroke mm (in)
84 x 90 (3.31 x 3.54)
Displacement Liter (cu in)
1.995 (121.74)
Maximum output kW(hp)/rpm
41.2 (56) /3800
Cont. rating output kW(hp)/rpm
36.8 (50) /3650
Combustion system
Direct Injection
Starting system
Electric
Cooling system
Freshwater cooling by centrifugal freshwater pump and rubber impeller sea water pump
Lubrication system
Forced lubrication with trochoid pump
Reduction and reversing gear
KM3A (ANGLE DRIVE 7 DEG.)
Reduction gear system
MECHANICAL
Reduction ratio ((Ahead/Astern))
2.33/3.04
2.64/3.04
Propeller speed rpm at cont. rating
1629
1441
Direction of rotation Input shaft
Counterclockwise viewed from stern
Propeller shaft
Clockwise viewed from stern
Dry weight, engine with gear kg (lbs)
223 (492)