Troubleshooting; Troubleshooting After Starting - Yanmar 6LY3-STC Operation Manual

TROUBLESHOOTING

Before performing any troubleshooting
procedures within this section, review the
Safety section on page 4.
If a problem occurs, stop the engine
immediately. Refer to the Symptom column
in the Troubleshooting Chart to identify the
problem.
CAUTION! If any indicator fails to
illuminate when the key switch is in the
ON position, see your authorized
Yanmar Marine dealer or distributor for
service before operating the engine.
CAUTION! If any indicator illuminates
during engine operation, stop the
engine immediately. Determine the
cause and repair the problem before
you continue to operate the engine.
6LY3 LDC 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 exhaust color normal?
• The continuous emission of black exhaust
smoke indicates engine overloading. This
shortens the engineʼs 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.
© 2008 Yanmar Marine International
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