Question about Watts Onan Portable Generator - 4000 , Model# 5500

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Gas leaking from behind carburator on wen 5500 genrator

Generator has been sitting a while drained fuel from tank do not know i replaced filter correctly it will start but fuel pours from behind carb

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: I have an onan 5500 gas generator that wont start

What is the model? Chances are the carb needs cleaning or replaced.

Posted on Sep 28, 2009

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  • 9 Answers

SOURCE: Onan Generator stopped working in motorhome

Yes it wil not let you run your motorhome out of fuel they set it up that way so you dont strand yourself you may have a air bubble in the fuel line to the generator try blowing air generator fule line back into the tank

Posted on Feb 01, 2010

  • 1 Answer

SOURCE: The MOTOR on my Wen Power Pro model 5500 runs

The brushes need to be filed smooth or replaced. 15 minute job, remove 2 bolts on the generator cover ( side opposite the pull start ). Remove 2 more bolts holding a black plastic thing about 4 inches long on the left. Behing that piece, there is 1 bolt holding in the brushes ( red and white wire attached ). Remove the brushes and if they're not smooth, file down and reconnect everything. I was done in 15 minutes in the middle of Maine woods thanks to my Leatherman.

Posted on May 15, 2010

jgwhomeequip
  • 1902 Answers

SOURCE: our onan generator ran out of gas. we refueled but

No, not the filter, you will need to try to prime the carb better then with starting fluid, pour some gasoline down the carb, you may have to do this a few times, but everything will fire back up again once you get the air out of the system

Posted on May 25, 2010

  • 142 Answers

SOURCE: Onan Marquis 5000 generator. No gas going to the

12 V going to the pump, but is it turning (do you hear it running). If not change it.

Posted on Jun 13, 2010

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I suspect that your carburetor is gummed up by the alcohol laced fuel that you are forced to use. If you leave that fuel in your machine for 3 months or longer. the alcohol absorbs water that will form a jelly like gunk that will clog all of the ports as well as your fuel filter. What happens is the alcohol evaporates and leaves behind the water that mixes with the other additives in gasoline. You are going to have to clean your carb, and fuel filter. Drain all of the old gasoline out. Put fresh in and mix a little SeaFoam or other gasoline additive. The SeaFoam will help dissolve the gunk, and maybe you can get it started to run to see if it will clean itself out. You may still have to dismantle the carb and clean. At the end of the use, drain all of the gasoline out of the tank and leave it dry for storage.

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sounds like the float is stuck, how long has it ben setting around? try some carburetor cleaner. spray the carburetor down. empty the fuel tank put fresh fuel with fuel treatment. you may have to remove the spark plug, pull starter string a couple of times to clear out cylinder make sure spark plug is dry put back in and try to start the generator.

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