All ActivityMost RecentMost LikesSolutionsRe: onan generator 5500Says code four is overcrank. Says, logic: controller unable to sense genset frequency after 30 secs of holding the switch. I never get a code if just hold the start switch for several seconds to try a start.Re: onan generator 5500Blinks four times. I held the switch down as it says in the manual. This is the only code i can get. I've bypassed the oil shut down switch and still no go??onan generator 5500my onan generator starts but then stalls after releasing the start switch.