Engine, Repair/Replace/Maintain

Yanmar 3JH3 Engine Specifications (C387)

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C387 boats have had two types of Yanmar engines -- 3JH3xx and 3JH4xx.  Note that the 3JH3 engine has a much higher engine RPM to reach max horsepower.  Note also that this means that the transmission will also be different.  The change to 3JH4 engines took place around hull #60. The following is the specification for the 3JH3 engine:

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