Yanmar 4JH3-TE, Operation Manual

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48 6. TROUBLE AND TROUBLESHOOTING
Trouble Probable Cause Measure Reference
Starting Failures
Starter works.
but engine does not start. No fuel
Air in fuel line
Bad fuel
Clogged fuel filter
Poor fuel injection
Pressure leakage from
intake/exhaust valves
Replenish fuel; bleed.
Bleed.
Replace with recommended fuel.
Replace fuel filter.
Ask for repairs.
Ask for repairs.
3.2
3.2.2
3.1.1
5.2.3(1)
Starter does not turn or turns
too slowly
(Can be turned by hand) Insufficient battery charge
Faulty cable connection at terminal
Faulty starter switch
Faulty clutch safety switch
Faulty starter Check battery fluid, recharge.
Remove rust from terminal; retighten
Ask for repairs.
Ask for repairs.
Ask for repairs. 5.2.2(3)
Cannot be turned manually. Inner parts seized or damaged Ask for repairs. -
♦
Poor exhaust color
Black smoke emitted. Overload
Improper fuel
Boost pressure low
Faulty spraying of F.O. injection
Excessive intake/exhaust
valve clearance Reduce load.
Replace with recommended fuel.
Wash turbocharger blower.
Ask for repairs.
Ask for repairs.
3.1.1
5.2.3(5)
White smoke emitted. Improper fuel
Faulty spraying of F.O. injection
Fuel injection timing delay
Lube oil burns/excessive
consumption Replace with recommended fuel.
Ask for repairs.
Ask for repairs
Ask for repairs. 3.1.1
♦
Faulty Clutch Action
Remote control handle
action is heavy
Rusty cable Grease the cable or replace.
-
Propeller shaft revolves
when in NEUTRAL Clutch lever is incorrectly aligned.
Propeller shaft incorrectly installed.
Adjust the position of the clutch lever.
Ask for repairs.
5.2.3(5B)
Propeller shaft does not
revolve when in
FORWARD or REVERSE.
Or, revolves with insufficient
speed Operating at high speed while
trawling position.
Insufficient clutch oil.
Broken oil pump.
Worn clutch friction plate. Change the trawling lever to H position
Refill with clutch oil.
Ask for repairs.
Ask for repairs. 2.5.2(2)
3.4
When the clutch is broken and the boat will not move,
see.[6.2 Emergency Repairs for Marine gear trouble].