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tkcas01's avatar
tkcas01
Explorer
Oct 22, 2013

Onan 7500 Quiet Diesel - "gallops" when trying to start

When my gen is cold, it starts normally. However, if I try to start it when it is hot, it "gallops", meaning it sounds like it is wanting to start but not quite kicking in, and it jumps somewhat viol...
eHoefler's avatar
eHoefler
Explorer II
Oct 23, 2013
Normal. It is called " Dieseling". The simple design of the engine is like the old ones unlike today's diesels. It is from incomplete combustion of a cold engine, as the engine starts to warm up, it will burn the fuel more efficiently.

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