Onan 5500 Marquis Gold Starting/Fuel issue

Question

Hi Folks,&nbsp;I tried starting my genny and it turns over but won't catch.&nbsp; As you see here:&nbsp;https://youtu.be/poj8uHhscpMI then researched the 36 code and started tracing a fuel issue.&nbsp; I removed the hose that comes off the primer pump and you can hear it running but no fuel comes out:&nbsp;https://youtu.be/LyrrRtJTn6UThere is fuel in the tank, so I'm not really sure what could be happening here.&nbsp; Can anybody provide a next-step idea as to what I can try from here?&nbsp; Just for gigles, it wants to run if you shoot a tiny squirt of starter fluid into the butterfly valve...Thank you,&nbsp;Tim

1995brave · Answer

1. You need over a quarter tank of gas for the fuel pickup. 2. Trace the fuel line from the generator to the fuel tank and look for leaks. 3. change the fuel filter.
3. You can always disconnect the fuel line from the generator, add a piece of flexible line, put it in a gas can and see if the generator will run .

gbopp · Answer

Is the oil level correct in the generator?Bad low oil senzor?Trace the fuel line back to the tank. Look for a collapsed rubber section of line.Is there a fuel filter that could be clogged?

timinfla2 · Answer

All great tips, thanks folks - I'll double check the fuel and oil levels, as well as give a further check of the fuel lines.  Any idea what diameter the fuel line is just in case I need to buy new stuff?  Thanks!

big_buford · Answer

Age of rig? more then likely need a new fuel pump. mine lasted 8 yrs but have seen many go out sooner.But as others have said , make sure your not sucking air from fuel line first.

big_buford · Answer

fuel pumpPretty sure thats the one I went with.

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Onan 5500 Marquis Gold Starting/Fuel issue

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