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Onan 5500 Marquis in motor home. Starts and runs great for a…

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Onan 5500 Marquis in...

Onan 5500 Marquis in motor home. Starts and runs great for a min or two, then dumps fuel from top area of carb and stalls.

Mechanic's Assistant: When did you last clean or perform maintenance on your Onan tool or machine? How old is it?

I have done fairly regular maintenance. it is in a 2004 Winabago had two hundred hrs on gen. when I bought the motor home, now has 410 hrs on it. normally runs well.

Mechanic's Assistant: How long has this been going on with your Onan? What have you tried so far?

Just started doing it found lose and leaking fuel line and tighten it back up and thought that fixed it. Then is started running for a couple mins then dumps fuel out the top and stalls

Mechanic's Assistant: Is there anything else the Engine Expert should know before I connect you? Rest assured that they'll be able to help you.

No thats it

Submitted: 11 months ago.Category: RV
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Answered in 20 minutes by:
10/4/2021
RV Mechanic: James Davy,
 replied 11 months ago
James Davy
Category: RV
Satisfied Customers: 1,046
Experience: RV at RV Peddler
Verified

Good Morning welcome to Just answer my name is James.

Sorry to hear about your generator problems.

I dont quite understand dumping fuel from the top area, possible float stuck or dirt causing the needle not to seat.

The Onan carburetor is non serviceable and will have to be replaced. It is possible to take apart and cleaned being careful not to damage gaskets.

James

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Customer reply replied 11 months ago
Tk's
RV Mechanic: James Davy,
 replied 11 months ago

Thank you for the question.

James

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