Re: Onan Aux Issue
Onan's Onamax oil is 15-40 and they recommend it for all their machines. It gets very thick after running for longer than it should in the newer machines. 150 hours or less is a recommended oil change interval. Older Onan's like this one had a very hd bottom end and oil pump. Pressure loss on one of those was not common and they had 30-40 lbs of oil pressure at 1800 rpm
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Rich Biebel
S/C 1479
Stock 147R
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