Generator Stalling - Dutchmen Owners

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Old 05-06-2015, 10:18 PM   #1
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Generator Stalling

I know this was discussed a bit ago and the consensus was probably a fuel pump issue, but I'd like some opinions before I God forbid, go in for warranty work. New unit with a Onan 5500. Has 3 hours on it. Runs for a bit then dies out. Need to wait 5-10 minutes and starts right up. Seems to run a bit longer each time I start. Last time about 30 minutes or so. Should I keep running it in hopes of divine intervention and it gets better, or do I take it in. Have an appointment at CW in Wauconda Illinois to have my solar panels installed Friday. That they said I could wait for that and take it home. If they do warranty work on the generator, maybe a three week wait between diagnosis, warranty submittal, approval, parts order, then finally installation. Not a handy guy so anything beyond adjusting or cleaning could beyond my skill set. Thoughts? Thanks,
Rusty
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Old 05-06-2015, 10:37 PM   #2
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Dump a can of sea foam in fuel tank. If tank is full add 2 cans. Let sea foam settle in fuel tank for a few hours, then start generator and let it run until it dies. May have to put a load on it. Next day start generator and after 15 minutes start putting load on genset and leave running for hours. I run mine every 2 weeks with load and I also use ethanol free gasoline.
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Old 05-06-2015, 10:37 PM   #3
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Take the fuel cap off & see if that makes a difference. Could be its creating a vacuum.
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Old 05-06-2015, 11:34 PM   #4
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Could be some old gas, left over from when they build it, Do what lakebuster stated, then make sure you run it a couple times a month, just to keep the old gas from messing up the Carburetor and fuel filter
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Old 05-07-2015, 12:44 AM   #5
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X3 on the SeaFoam...

If you think it's the fuel pump try starting the generator from the control on the front of the unit. When you press the start button down to prime and you should be able hear the fuel pump cycle. Changing the fuel filter is easy, and the first thing to try if you think you had bad gas, you'll be able to find one that will fit off the shelf at an auto parts store.

My front pump tank was slow to fill due to a kink in one of the vent lines. I believe this would cause a vacuum issue as mentioned above if it was on the rear generator tank.

You may also want to review an extensive post from another forum about troubleshooting Onan generator issues, that were ultimately attributed to the EMS, but covers all the bases and includes several hands on videos...

Onan 5500 not starting...partially solved
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Old 05-07-2015, 01:16 AM   #6
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Thanks for the insight. Drove out to the yard and added the Sea Foam. I'll test it out tomorrow and listen for the fuel pump and maybe the filter. Appreciate all the tips.
Rusty
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Old 05-07-2015, 02:20 AM   #7
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Rusty,


When you get your generator up and running Onan recommends the following break in procedure...


Breaking In Your New Generator






Your generator will perform better if you follow the break-in procedure


recommended in the Operatorís Manual. The break-in process typically involves


running the generator at about 50 percent load for two hours, then at about 75


percent load for two hours, then letting it cool down. You should change the engine


crankcase oil after the fi rst 20 hours of operation, and every 100 to 150 hours


thereafter.


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Old 05-07-2015, 03:46 AM   #8
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I am fighting this issue as well. Post what ever solution seems to work.
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Old 05-07-2015, 04:24 AM   #9
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DW and I were talking about going down to the gulf coast this Memorial Day and it made me remember the altitude adjustment screw on the Onan Generator.

This probably is not the issue as it does not have to be spot on. Mine is set @ 3,000 ft were I live. The stomping grounds I roam without adjusting for the altitude vary from 500 to 3,500 ft and I've never noticed a difference.

Now if it's turned up to 10,000 ft and your @ 1,000 that may be a problem?
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Old 05-07-2015, 03:34 PM   #10
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Thanks once again for all the tips. Followed everyones' suggestion, (Sea Foam, venting, listening for fuel pump, etc.) Ran it today for two hours while I re-routed my DISH box and re-installing the shelf in the closet, even putting it on 25% load for an hour. Ran perfectly until I was just about to shut it down, when it stalled. Since it is getting better every time, I will continue to fire it up whenever I get the chance until it goes away or gets worse. Decided not to have some technician tear it apart for diagnosis. I trust you experienced campers on the forum a lot more. Thanks for all the help.
Rusty
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