5. Trouble and Troubleshooting
Trouble Probable Cause
Measure Reference
Starting
Failures
Starter
turns, but engine No fuel. Replenish fuel; vent air.
does not start
Fuel filter is clogged.
Replace element.
Improper fuel. Replace
with recommended fuel.
Faulty fuel
injection.
Ask
for
repairs.
Compression
leakage from Ask
for
repairs.
intake/exhaust
valve.
Starter
does not turn
or
Faulty clutch position.
Shift
to
NEUTRAL and start.
turns
slowly Insufficient battery charge.
Check
fluid lever; recharge; replace.
(Engine can be turned Cable terminal contact failure. Remove rust from terminal; retighten.
manually) Faulty safety switch device.
Ask for repairs.
Faulty starter switch. Ask for repairs.
Power
lacking due
to
other use.
Ask for repairs.
Consult your dealer.
Engine cannot be turned
Internal parts seized; broken. Ask
for
repairs.
manually
Abnormal
Exhaust Colour Load increased. Inspect propeller.
Black
smoke Contaminated intake silencer. Clean element.
Improper fuel.
Replace
with recommended fuel.
Faulty
spraying
of
fuel injection valve. Ask for repairs.
Incorrect intake/exhaust valve head Ask for repairs.
clearance.
White smoke
Improper fuel. Ask for repairs.
Faulty spraying
of
fuel injection valve. Ask for repairs.
Fuel injection timing off.
Ask
for
repairs.
Lube
oil burns; excessive consumption. Ask for repairs.
Consulting Your Yanmar Dealer
or
Distributor
Refer difficult problems and repairs to your Yanmar dealer or distributor.
At the time
of
trouble, check and report the following:
1.
Engine model and number:
2.
Boat name, material of hull, size (tons):
3.
Use, type
of
fishing done, no. of hours run:
4.
Total no.
of
operation hours (refer to hour metre), age
of
boat:
5.
Condition before trouble (engine rpm, type
of
operation, load condition, etc.):
6.
Details
of
trouble:
3.3.2(3)
4.3.4(1)
3.3.2(1)
4.3.2(4)
4.3.4(6)
3.1.1
3.1.1
(exhaust colour; sound
of
engine; does engine start; can engine be turned manually;
type
of
fuel used; brand and viscosity
of
lube oil; etc.)
7.
Past problems and repairs:
43
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