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prepilot_3ck's avatar
prepilot_3ck
Explorer
Sep 14, 2018

Generator stops after an hour or so.

Yalls,

So, I have this 2016 class-A. It has about 6,000 miles on it, and a 5500W gas generator. The generator has about 300 hours (I think) on it.

It seems to start ok for the most part, sometimes it struggles, but it fires up. It will run for a period if time... and hour... hour 1/2... maybe 1/2 hour then it sputters out and quits. I can restart it, but it dies right away. The little light on my starter switch flashes after this happens. If I let it sit, off, for a LONG time . Like HOURS or over night, the flashing on the switch will stop and it will fire up again... then die again after a period of time.

Load doesn't seem to matter, parked vs. driving doesn't seem to matter. It just runs for some time, then pukes, and may or may not restart. I don't have my auto start turned on or anything.

It "feels" like it might be over heating. It's hot here in Vegas, and I can only imaging what the air trapped between the road.ground and the underside of the RV would be. Anyway, I'm not really sure how to trouble shoot this. There are no temp gauges or lights on the generator to indicate why it shut off. I called my RV dealer and they said "add stable to the gas tank and some sea foam". They think it's bad/stale gas or a gummed up carburetor.

Anyway, I don't think it's the gas, but I suppose it could be. Anyone else have any suggestions?

Thanks,
Brian
  • Could it possibly be as simple as a closed or clogged vent on the feul tank?
  • IB853347201 wrote:
    I take it this an Onan Marquis 5500? If so, get the manual and read up on trouble codes. Next time this happens, read the trouble codes/flashes on the start switch, and you will have a better idea as to the issue.
    Could be low oil, low fuel, etc..

    x2
  • I take it this an Onan Marquis 5500? If so, get the manual and read up on trouble codes. Next time this happens, read the trouble codes/flashes on the start switch, and you will have a better idea as to the issue.
    Could be low oil, low fuel, etc..
  • Do a search. There are a ton of replies with people having the same problem. When that happens it is generally the fuel pump or low oil. If the oil is not low purchase a fuel pump and that will generally take care of the issue. I think you can even get the pump on Amazon.