Onan generator storage, winterization, or no-start after sitting
Use this when an Onan generator will not start after storage, winterization, or sitting through cold weather; the official Cummins flyer and support pages point owners to record last run, fuel condition, hour meter, model/spec, and service history before service.
Owner-safe checklist
- Turn the generator off and do not keep repeating start attempts after repeated no-start or fault flashes.
- Record storage or winterization dates, last successful run, fuel age, hour meter, model/spec, and serial information.
- Use only the normal owner manual and support guidance for exercise or maintenance that applies to the installed model.
- Call qualified Cummins Onan service for stale-fuel symptoms, repeated no-start after storage, leaks, exhaust odor, or fault codes that return.