Yanmar 4BY2 - Troubleshooting; Troubleshooting Information

TROUBLESHOOTING
If a problem occurs, stop the engine
immediately. Refer to the
Problem / Symptom column in the
Troubleshooting Chart to identify the
problem.
TROUBLESHOOTING
INFORMATION
If your engine does not operate properly,
refer to the troubleshooting chart or see your
authorized Yanmar marine dealer or
distributor.
Provide the authorized Yanmar marine
dealer or distributor with the following
information:
• Model name and serial number of your
engine
• Boat name, hull material, size
• Use and type of boating
• Total number of operation hours (refer to
hourmeter), age of boat
• Operating conditions when the problem
occurred:
- Engine rpm
- Color of exhaust smoke
- Type of diesel fuel
- Type of engine oil
- Any abnormal noises or vibration
• Operating environment such as high
altitude or extreme ambient temperatures,
etc.
• Engine maintenance history and previous
problems
• Other factors that contribute to the
problem
BY Series Operation Manual 59
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