2000 Itasca Suncruiser 35u. Bought the coach 2 weeks ago and am going through a few things that need attention. On of which is the Genset. This unit has the Onan Emerald 5000 generator. It's got spark but has a no fuel situation. I figured it was a gummed carb but much to my surprise it's a fuel supply issue. Is there a valve of some sort that can be turned on and off to supply the generator with fuel? I pulled the fuel supply line which I'm assuming comes directly from the coach's fuel tank and there wasn't anything there. I was pulling the line from the inlet side of the generators fuel pump. I tried tracing the line back to the tank but it runs up into the coaches center section and I couldn't do so. I currently have a little over half tank of fuel in the fuel tank.Any help with this is appreciated!

If your gas tank is low (1/3 to 1/4 tank depending on coach) it will not pull fuel from it for the gen, this is so you don't run the gen and run out of fuel leaving you stranded.

The OP stated he had over half a tank of fuel so that shouldn't be an issue. If you try to start the generator at the gen set you should be able to hear the electric fuel pump run. If not could be electrical problem or starter is bad. Good luck and let us know.

I have had a similar problem and it was due to a crack in the old rubber gas line. Mine was at the top of the tank where it was not accessible. I would suggest taking the line that is available to you and put it into a gas can to see if it starts. If it does than you can be pretty certain the problem is a crack in the line up by the tank. I ended up taking it to a repair shop and had it replaced. Good luck. P.S. I had a full tank when I took mine for repair and they put it on a lift and did not lower the tank but blocked up the tank and raised the MH away from the tank enough to gain access to the hose. I suppose if you don't have access to a lift, which a majority of us do not, it could be raised with the jacks and than securely placing blocks under MH. I was glad I had dealer take care of it, was done in 90 minutes and the cost was reasonable.

run a separate lint to a one gallon can if gen runs then your issue will be the supply line

Based on the age of you MH, I also suspect the gas line hose. I had to replace the hose on my 2001 Residency a few years ago for the same reason. The test is trying to start it with the gas line stuck in a gas can. Dropping the tank is no big deal but with a half a tank, it's a lot harder. If you have "pass-through" compartments, see if one of them passes over the front of the gas tank. If so, see if you can crawl in far enough to cut a hole in the center of the bottom of the compartment near the front of the tank to access the lines. You can always patch the hole with sheetmetal. That was a lot easier for me.If you want drop the tank to get at the line, you'll need to loosen and remove the filler pipe beforehand. Put a floor jack under the front of the tank and loosen the saddle strap holding that end. The tank will hinge down allowing access to the fuel lines. When done, just jack the tank back up till the saddle bolts line up again. NO SMOKING WHILE UNDER THERE!

No fuel to Generator. | Good Sam Community

booty51
Explorer
Apr 05, 2016
Loosen fuel cap on fuel tank. Remove fuel line from generator fuel pump blow back into tank with compressed air to see if line is clear of debris. Also if you do not hear it bubbling in the tank your fuel line may be higher than the actual fuel level. After you blow line drain some fuel in a can from hose.Reconnect to fuel pump. Now disconnect fuel line from carb. Place end in a can to catch fuel. Turn generator over to prime fuel pump and hose that connects to carb. Once primed reconnect to carb and see if it will start. I let mine sit a while and I couldn't get it to prime. I think it was vapor locked between fuel pump and carb until i did what I just mentioned. I also installed a clear fuel filter in fuel line just before fuel pump so I could crawl under rv and see if fuel is at least to fuel pump from now on. Also heavily treat you fuel with sea foam gas treatment to help get rid of gums and deposits. I know this will bring on the comments but I have had good results with this in all small air-cooled engines.I also treat Mo Ho fuel if I am going to let it sit for long periods of time.
Vibrant93
Explorer
Apr 11, 2016
*Update. Found out yesterday that the fuel pump is not working. I have ~10.5v to the pump while cranking. Pulled the pump and hooked it direct to a 12v source and it doesn't do anything. Have a new one on order. Hopefully we will be up and running by the end of the week.

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No fuel to Generator.

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