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

[joebedford]

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).

Any suggestions?

[MNtundraRet]

Have you checked in air intake filter?

Is the carburetor clean?

[joebedford]

I looked at a youtube video - I may have too much oil in it. I don't remember adding any, but I'm old.

[IB853347201]

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

[joebedford]

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

[IB853347201]

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.

[MNtundraRet]

Did you set the altitude adjustment lever to correct altitude?

[joebedford]

I'll check the altitude adjustment, but like I said, I'm , <1000' and it has always worked this way.

[way2roll]

Is it throwing a code?

[slider45]

I second the code check. Update us

[joebedford]

I'll be at my RV in a month. That is if Milton spares it. I'll report back then.