TROUBLESHOOTING
If a problem occurs, stop the engine
immediately. Refer to the SYMPTOM
column in the Troubleshooting Chart to
identify the problem.
TROUBLESHOOTING
AFTER STARTING
Just after the engine has started, check the
following items at a low engine speed:
Is sufficient water being discharged
from the seawater outlet pipe?
• If the discharge is low, stop the engine
immediately. Identify the cause and
repair.
Is the exhaust color normal?
• The continuous emission of black exhaust
smoke indicates engine overloading. This
shortens the engine's life and should be
avoided.
Are there abnormal vibrations or noise?
• Depending on the hull structure, engine
and hull resonance may suddenly
increase at certain engine speed ranges,
causing heavy vibrations. Avoid operation
in this speed range. If any abnormal
sounds are heard, stop the engine and
inspect for cause.
Alarm sounds during operation.
• If the alarm sounds during operation,
lower the engine speed immediately,
check the warning lamps and stop the
engine for repairs.
Is there water, oil or fuel leakage? Are
there any loose bolts or connections?
JH4 Series Operation Manual 77
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