JH Series Operation Manual
135
TROUBLESHOOTING
SAFETY PRECAUTIONS
Before performing any troubleshooting
procedures within this section, review the
Safety section on page 3.
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 smoke color normal?
The continuous emission of black exhaust
smoke indicates engine overloading.
This shortens the engines 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
alarm lamps and stop the engine for
repairs.
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