Forum Discussion

joebedford's avatar
joebedford
Nomad II
Sep 26, 2024

gas Onan 5500 built-in runs for half an hour then stops

It seems to be doing this consistently regardless of the outside temperature. It's <1000' above sea level. It's a 2011 model. It worked fine for years and suddenly started doing this last winter (FL...
IB853347201's avatar
IB853347201
Nomad
Sep 27, 2024

Sounds like the fuel pump. Had the same problem with my 5500 2 years ago.

joebedford's avatar
joebedford
Nomad II
Sep 27, 2024

I know nothing is easy on the Onan built-in, but is the fuel pump change simple?

  • IB853347201's avatar
    IB853347201
    Nomad
    Sep 28, 2024

    Yes, easily accessible from the bottom. It's underneath the front left hand corner, when facing the front of the generator. Basically a couple of clamps on the fuel line and a wiring harness to unplug, plug in. You might want to also change the fuel filter as well. it's on the same line in beside the fuel pump.

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