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Old 09-09-2016, 08:17 PM   #2
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ChrisL's Avatar
City: San Diego
Country: US
Vessel Name: Morning Star
Vessel Model: Defever 41
Join Date: Jan 2015
Posts: 42

Hi Roger,

I have 78 Defever with a 4.0 Onan. I was told by a local parts supplier that Onan used Kobata's for the gensets for those years, which are generally good diesel engines.

Mine had a small oil leak from the pan, so replaced the gasket and it has been fine since. Depending on the age, it could be something as simple as gaskets or a messy oil change.
Morning Star
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