Why does my Onan 4000 generator keep shutting off?
Why does my Onan 4000 generator keep shutting off? Check the Oil Level If the fuel supply is sufficient but your generator still starts and stops, check the generator's oil level. Onan RV generators have a “low oil” shutoff that could cause a shutdown. As oil warms it thins out and this may cause it to fall below the proper level. How often should I change the oil in my Onan 4000 generator? Onan RV recommends changing the oil every 100 hours or once a year, whichever comes first. It only takes about 20 minutes and you will be good...