How do you fix an Onan 4000 generator that is surging?

Answer by  Jsands1982 (871)

If your generator is surging check all your wiring. But make sure that you disconnect all power to it. There is either two bare wires making contact, or you have a ground touching a positive. Consult the maker or a manual to solve this issue.

Answer by  ijlalnoor (2656)

Check all of the wiring because it sounds like two wires are making contact. Make sure all the wires are separated.

Answer by  Anonymous

Fuel varnishing in the carb is the main cause. Carb cleaner/injector cleaner might help a mild case.

Answer by  japratt (1687)

If your generator seems to be surging a lot then you will need to take it in to be fixed.