Onan 5000 not getting fuel

1995brave wrote:
On some models of the Onan generators you can hold the Stop button on the generator and it runs the pump to prime the generator, check your manual.

yes, that.
Also, many later models of Onans have a light in the switch rocker. When there is a problem, that light blinks in a certain pattern, such as 3 blinks, pause, 4 blinks, long pause, start over. this is a troubleshooting aid. try to start the generator, then watch for the blinking light.I didn't know this until the belt broke on my Onan 5500 and it quit. The blinking light told me "No power output".

On some models of the Onan generators you can hold the Stop button on the generator and it runs the pump to prime the generator, check your manual.

You could attach a hose to the inside of pump into gas can to see if it picks up fuel.
You could use this to fire up the genset to insure pump is providing sufficient fuel.

That’s exactly what I was just thinking. I have a little 12v test battery and I’m going to undo the wires on the pump and jump it to the battery and see what’s what. Then we’ll know.

You could use a jumper from the battery power connection and go directly to the power lead from the pump.
Disconnect the line from pump to genset carb to see if fuel flows.

Thanks guys, and thanks Bud, I hope that’s not what happened in one month but I’m tending to think the fuel pump because when I am pressing the button to crank the gen I don’t hear the fuel pump going. I wish there was a manual button for it.

Take the fuel line loose on the tank side of the pump. Use a short piece of hose to extend the line out so you can blow into it. You should be able to hear bubbling in the tank.
I am guessing that the rubber line on top of the tank has rotted out.

I have limited experience with those but the last one I looked at it was very obvious when the fuel pump was running. You're probably able to hear and feel it.