Quote:
Originally Posted by Jimbo56
I’d like to ask an Onan 4000 question as I’ve searched and can’t find another thread. In my manual, and during PDI, I was told to hold the off button down until the red light (priming) comes on, for 5 seconds. Well of course it started fine. But ever since leaving dealer 2 years ago, I have to prime it for 30 seconds. It will always start. And it runs fine. If it was a 1970 Chevy I’d think the vacuum pump diaphragm was bad. Is this just normal?
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Like the old Chevy, the carb is higher than the fuel tank and depending how tight the tolerances are, how well the float valve seats or the fuel pump check valve seals, the fuel will have a tendency to seep to a lower spot (the fuel tank).