Onan Generator Issue - 5500

[ChrisAndGarren]

So, they ran it again this AM, then changed all the filters and the oil like we asked. Going to pick her up tonight, and will run that genny for sure this week! Supposed to be HOT here, and no fun to drive without the AC on.....!

I have my fingers crossed that we've solved the issue.

Thanks for all the suggestions, and if anything changes I will post!

Garren

[Dijoeboss]

On my 2013 XL I can say there are 2 problems, one is this junky auto transfer switch, it's as good as gone when I figure out what I'm gonna do with it, two - is the generator not running both a/c units when it's hot, (yes fridge is on propane / yes water heater is switch to propane) if I hit a bump or stop suddenly, the generator will shut off completely.... The Rv repair center can't duplicate a concern, so they don't know what to fix....

Don't dwell to much on the problem and enjoy your trip! It does get aggravating, but not worth the wasted mental madness. If I come up with a fix or resolve, I will definitely pass it along, I'm just getting started!!


2013 Georgetown XL 350
Bunkhouse
2002 F250 4X4 CC
2012 Jeep Liberty

[tonytiza]

I just had that same problem and it was the fuel pump after 10 or 15 minutes would die out and after 10 minutes i was able to start it again. it was the fuel pump which i replaced and never another problem.

[gmann32]

I have a 2008 Georgetown 370 with a 5500 watt Oman gen. It has 2 fuel filters on it. 1 in front of fuel pump and 1 in front of carb. Change them both!

[mud yapster]

This was when brand new from FR. My 5500 Onan did about the same thing it would run for 30 minutes then shut off then after restarting it would run 5 or 10 minutes then shut off again. Checked my fuel pump it was ok but not pumping any fuel. I traced the fuel line from the gen all the way back to the fuel tank and found the fuel line kinked off in 5 different places. The kinks were at the fuel line holding brackets that the lines were ran through. Fixed that and then it ran like a champ.

[MarkAnne]

I'm having recurring problem with generator. New electronic control unit $300 and new fuel filter and pump. $300 and Generator still quits and gives fuel error (3 flashes of light). I think the fuel inlet in the tank may be clogging. Does anyone know what is on the end if the fuel line which is suspended in the tank? Can it clog?

Thanks


2010 Georgetown 337 DS

Sent from my iPhone using Forest River Forums

[Freds342]

Originally Posted by gmann55

I have a 2008 Georgetown 370 with a 5500 watt Oman gen. It has 2 fuel filters on it. 1 in front of fuel pump and 1 in front of carb. Change them both!

Onan has an adapter to replace the carb end filter. You don't need two

P/N A029S253. $20.00 at RV Auto Parts.

[gmann32]

The filter is a lot cheaper than the adapter!

[gmann32]

I also changed the oil and filter on my gen. I put Mobil 1 synthetic oil in it as I figure it will run cooler. Check the spec on your engine and add the right amount of oil. When the oil level is even a little low it will continue to shut the engine down!

[Robert Vaughn]

I know of two folks here in Oregon. One with a 31' class c and another with a recent model year v10 class a. They both had issues with the generator stopping after 20 minutes or so when it was hit outside. For them, the solution was to make a vent, about 8x10" in the storage bin hatch that the generator is installed in. Appears to have fixed their issues. Their issues did not occur below 80f.

I have a 2008 350. No issues with mine. The only noticeable difference between mine and theirs is that my generator is installed at the rear of the RV. On both of their rvs the generator is installed up front. They both think that the generator over heats some how because of proximity to engine heat.

Good luck.

[RVCrazy]

We had a similar problem with our generator (Generac) this year. Never had a problem in past three years. It turned out there was a temperature switch on the generator and if the temperature got to high it would shut itself off. Going down the road with the temps in the 100's and the heat from road, tires, etc. it would shut itself off. It seemed to work fine sitting still even in the warmer temps. It was the added heat from the road that caused the issue. Temperatures dropped and she starting working just fine again in all situations.

[oldgold]

I just got our 4000 back from the Cummins/Onan shop south of Atlanta. I had same error code 36 and my fuel pump was bad.

Also, to the guys saying to use synthetic, the Onan rep at the shop told me NOT to use synthetic. He said the particles were smaller and it had a greater chance of losing oil. He said the best oil was regular 15w40 or the straight up 30 weight.

If you look on Onan website they have a ton of service centers. You can call them and order anything you might need

[gmann32]

If you go to the Onan web sites, they say you can use synthetic oil after break in period but keep your regular oil change intervals. I find the engine runs a lot cooler!