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Discussion Starter · #1 ·
Hello, I am a bit of a greenhorn on this deal, but I am looking for help with a Case 646 new to me project. The Onan B43m runs goood!!, but....
idle it knocks near governor shaft, not coming from valves or rod ends only seems to be originating from this area. I am not that familiar with onan's but is it normal or am I in for a project. Engine only makes this noise at idle mid range and top no load are sounding fine. Tractor is a 1983 seems all original with low hours. Any help, opinions, answers would be appreciated!!!!:praying:
 

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Discussion Starter · #4 ·
thanks for the replies, i was kinda thinking camshaft bearing too, after seeing the thread about rebuilding. I gonna try to move the governor shaft when running too see if it changes, will let you know.:thanku:
 

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Discussion Starter · #5 ·
Moving the governor up and down does not change the sound however I can feel the tapping thru the gov. shaft, thank for the help!
 
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