Troubleshooting; Safety Precautions; Troubleshooting After Starting - Yanmar 4JH45 Operation Manual

TROUBLESHOOTING

SAFETY PRECAUTIONS

Before performing any troubleshooting
procedures within this section, review the
Safety section on page
If a problem occurs, stop the engine
immediately. Refer to the Symptom
column in the Troubleshooting Chart to
identify the problem.
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JH Series Operation Manual
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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