Yanmar 4JH4-TE Service Manual

9. Coolant system
264
9.2.1 Specifications of seawater pump
(1) Performance
(2) Durability (reference data)
Flow Min. 3800 L/h at
pin = -5 kPa (-0.05 bar)
pout = 95 kPa (0.95 bar)
n = 3250 min
-1
after 1500 h duty
Self-priming ability Max. 10 s at
Suction head = 0.5 m
length of pipe = 0.6 m
n = 500 min
-1
Tightness test 400 kPa (4 bar)
Impeller
Flow drop
Min. 1500 h
Max. 10% after 1000 h
Leakage from seals
Mechanical seal, water
Lip seal, oil
Max. 3 cm
3
/h
3000 h
3000 h
Cover, wear plate Min. 3000 h
Other parts Min. 6000 h

Yanmar 4JH4-TE Specifications

General

Number of Cylinders	4
Aspiration	Turbocharged
Fuel System	Direct injection
Alternator	12V - 80A
Cooling System	Fresh water cooling with heat exchanger
Engine Type	4-stroke, water-cooled diesel engine
Rated Output	55 kW (75 mhp) at 3200 rpm
Starting System	Electric starting
Lubrication System	Forced lubrication with gear pump