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

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Will not start gas not getting to it

Generator will not start acted like it is not getting gas

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  • rev43320 May 26, 2010

    No that is not it gets the gas straight from the regular fuel tank. The tank must have at least 1/4 tank to run the Gen. setting on half tank now.
    Took the line loose just before the Gen. no fuel there, can't find out if it has it's own fuel pump, if it does there should be a fuse to it but can't find one for it.


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This might sound dumb ... is the fuel valve turned on?

Posted on May 26, 2010

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  • A Miller May 26, 2010

    I think the tank is above the engine, it may not require a pump.

    Im not sure on this model.

    Study the fuel line path ... it comes out of the tank ... should go through a valve ... you say it is on ... check it. From the falve it goes to the carb or a pump. Pull the line off ... got gas? Yes ... put it back ... No ... make sure the valve is on ... blow back through the line ... air going into the tank? It may have been blocked.

  • A Miller May 26, 2010

    Oh? ... my efforts not helpful ... thanks ...

  • A Miller May 29, 2010

    You disconnected the fuel line from the engine and there is no fuel coming out of the line, directly from the tank ... and you are still looking for the pump ... most lines come from the bottom of the tank ... does your?

    good luch with your project.


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