Technical Data for Yanmar 4JH2
    

Model. 4JH2(B)E
Bore x Stroke. 82 X 86mm
Displacement. 1,817 cc.
Configuration. 4 Cylinder, vertical, 4cycle water-cooled diesel engine. Direct injection.
Sales date app.. 1990 - 1998
Dimensions LxWxH mm. 869 X 561 X 643mm
Dry weight. 226Kg (228Kg)
Output: max. / continuous. 50Hp(36,8Kw)/3600Rpm / 46Hp(33,8Kw)/3400Rpm
Cooling System. Constant high temperature fresh water cooling
Starting System. Starter: 12V - 1,8Kw Generator: 12V - 55A (LR155-20)
Lubrication system. Forced lubrication by trochoid pump
Mounting flange No. SAE 4
Clutch. Constant mesh, multiple friction disc (KBW20)
Rotation, crankshaft / propel. Counterclockwise / Clockwise viewed from stern
Fire Order. 1 - 3 - 4 2 - 1
Max. Torque. 11,2Kgm/3200Rpm
Fuel Consumption. Max rpm. 185g/Hp-Hr
Notes: (B)= Gearbox KM4A downangel 7 Cone type. Birotation
Service Data:  
Engine oil. 7,0L CD - 15W/40
Gear oil. 1,2L ATF "A" (KBW20) / 1,3L CD 15W/40 (KM4A)
Valve clearance (Cold). Intake: 0,2mm Exhaust: 0,2mm
Fuel Injection Timing. 14 B.T.D.C.
Fuel Injection Pressure. 200+- 5Kg/cm2
Exhaust gas Temp. 560 C at max. output
Lub. Oil press. 3,5 - 4,5Kgf/cm2 at max. output
Top Clearance / Compression. 0,71 - 0,89mm / 22 - 27Kg/Cm2
Tightning Torque:*  
Cylinder Head. 8,5Kgm
Bearing Con-Rod. 5,5Kgm
Bearing Main. 11,5Kgm
Flywheel Bolt. 8,0Kgm
Damper disk bolts. 2,6Kgm
Crankshaft V-pulley bolt. 12,0Kgm