Forum Discussion

mcewena's avatar
mcewena
Explorer
Jul 02, 2023

Onan propane rough, quits

The generator will start but then fart and sputter for a couple of minutes then die. Then won’t start. Leave it for a few hours and it might or might not be ok. Seems more failure prone in the mornings but still in the 70’s early morning and today it turns over freely but won’t fire.

No code flashes, vent tube clear , new air filter, propane tank full.

Ideas?

12 Replies

Show More
  • wolfe10's avatar
    wolfe10
    Explorer
    Jul 02, 2023
    Is this a liquid or vapor LP generator-- i.e. looking at the propane tank, it the port supplying the generator liquid or vapor?

    What year/model?
  • nickthehunter's avatar
    nickthehunter
    Nomad III
    Jul 02, 2023
    I could list about a hundred possibilities. Air, fuel, spark - if you could narrow it down to which one seems to be deficient at the generator itself (I.e,: saying the propane tank is full doesn’t mean the propane is getting in the generator cylinder) that would lead to better answers to your problem.
    If all else fails, clean the carbon out of the exhaust muffler, and check the oil.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,262 PostsLatest Activity: Jun 11, 2025