Forum Discussion

Racorman's avatar
Racorman
Explorer
Jun 05, 2017

Onan 5500 Stops Running after 15 minutes

I have a Class A gasser with the 5500 Onan generator. It has only 70 hours on it and it has run just fine until recently.

I start the generator from the inside control panel and it has no problem starting and running perfectly even under A/C load. Anywhere from 15 to 20 minutes the generator starts to stall and seconds later, it quits and cannot be started

I let it sit for an hour and I can start it up again..... 15 minutes, same stalling occurs.

Any thoughts on trouble shooting?

Thanks,

Racorman
  • Ltrip's avatar
    Ltrip
    Explorer
    Jun 05, 2017
    Mine is doing the same thing. I suspected the fuel pump. When the gen quit, I opened the carb drain and pressed the prime button. No fuel. Later when the gen would start, i shut it down before it quit on its own. I repeated the above and fuel came through.
    So, I have a new fuel pump, fuel filter on order.
    I anticipate that this will fix it. If not, on to the next possibility, which may require expert help.
    A friend of mine had the exact same problem, and this solution solved his problem.
    Good luck! Is your under warrantee?

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,194 PostsLatest Activity: Jan 29, 2025