Onan Marquis 5000 generator. No gas going to the carb. 12 volts going to fuel pump. Any thoughts? [email protected]

SIMPLE Onan Generator Fuel Pump Test and Replacement Tips

Could be or the fuel pump gummed up. Pull off fuel line to carb, unplug fuel pump and conenct direct to battery, see if fuel comes out the line (catch in a container) make sure when you conenct to battery no sparks near the open fuel line. If no fuel replace pump, if fuel pull car apart

Not normally, the board outputs to the fuel pump, or LP shut off solenoid. It doesn't know the difference.

Is it losing Battery power, or just not pumping? check connections, and pins on board connector. Failing that replace the board, if Battery voltage is been lost

Check fuel pump pressure, how long has it sat. What load is on after it stops?

It sounds very much like no AC output from the stator to the run circuit, or the main PCB failure

No, not the filter, you will need to try to prime the carb better then with starting fluid, pour some gasoline down the carb, you may have to do this a few times, but everything will fire back up again once you get the air out of the system

Give me to full model and spec # and I will email you a service manual.

Test the solinoid with an ohms meter and if the circuit is open replace the solinoid.

a 10 year old genset with only 45hrs on it...sound like the carb may need replace. working with these rv units for 6+ years has taught me that you cannot clean one well enough to fix it. you will need a new carb. your local onan dealer can help. when new the warrenty makes known that 1hr per month under load will keep the carb clean and problem free. evaporating gas leaves deposits and eventualy plug fuel jets. no replacement parts are recommended. i've personaly worked on rv's with 200+ hous and no issues at all. hope this helps, good luck...