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Jack_Kay's avatar
Jack_Kay
Explorer
Aug 12, 2013

Onan 5500 Generator stops

We have a Onan 5500 generator in our rig that doesn't want to run more than about 10 minutes when we are driving. When parked, it runs until I shut it off. The unit only has about 28 hours which is not a lot, so the first owners didn't run it much. I changed the oil and filter the other day & thought that might help. I am able to restart after a few minutes, but it will still shut down when rolling down the road. I do have a full fuel tank & the altitude adjustment is set for sea level where we are now. I have the manual and I need to verify what code is blinking, but I don't understand what would be different about driving and sitting still. Fluids being tossed around? Any thoughts?
  • Jack_Kay's avatar
    Jack_Kay
    Explorer
    Aug 13, 2013
    The code is 36 which seems unspecified stopping. Not much help. I parked too close to the pedistal to open the door to check the oil. Have to wait until I move now.
  • WyoTraveler's avatar
    WyoTraveler
    Explorer
    Aug 12, 2013
    My 5500 Onan was doing about same thing. Has been several posts on issue. Mine threw code 36. Fuel pump was over heating. They replaced under warranty. So far runs ok. If it happens again I am going to move the fuel pump away from the generator a few feet and bolt it to the MH frame where it will get more cooling.
  • Dadio24's avatar
    Dadio24
    Explorer
    Aug 12, 2013
    Double check the oil level once again. They have a switch to shut down when oil is low. Turning a corner will likely cause them to shut down when low alos...

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