New Onan 5500 gen - oil change and air filter questions

On my Onan 5500 gas generator I use 122-0836 oil filter and 140-3116 air filter. Your manual should contain all of that info and info on oil and temp. If in doubt Call Onan and give them your model and serial number they will give you the info you need.

Onan parts phone: 1-877-938-6762

They were real helpful to me.

BTW: I tried a Napa generic oil filter first. They are shorter and would not fit properly. Onan said there is a check valve in the Onan filter that prevents over pressure.