TROUBLESHOOTING
INFORMATION
If the engine does not operate properly, refer
to the Troubleshooting Chart on page 79 or
see your authorized Yanmar marine dealer
or distributor.
Supply the authorized Yanmar marine
dealer or distributor with the following
information:
• Model name and serial number of your
engine
• Boat model, hull material, size (tons)
• Use, type of boating, number of hours run
• Total number of operation hours (refer to
hourmeter), age of boat
• The operating conditions when the
problem occurs:
• 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
TROUBLESHOOTING
82 JH4 Series Operation Manual
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