Onan Marquis 5500 surging
The Onan in my 2000 Holiday Rambler has about 400 hours on it. When I first start it, it will run smoothly for about 10 seconds, then start surging then eventually quit. It may do this for about 10 st...
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Fuel pump is a common problem with them. Try putting the fuel line in a can of gas with some seafoam in it to clean the carb.
