Onan starts and dies

jjrbus wrote:
I have a clear fuel line to generator, there is no stoppage of fuel to the carb. The voltage to the fuel pump stops as the generator dies not before. Really wish I knew what I am doing.
Thanks for the responses.

Clear fuel line only shows there is fuel in the line and nothing else. You can have fuel in the line and zero pressure or zero suction depending which side of the fuel pump you are looking at and still have fuel present in the line.

Fuel pump voltage stopping as the gen is dying is most likely the safety system turning off the fuel pump since engine is no longer up to speed.

Even IF the voltage to fuel pump was the culprit you should have a full fuel bowl in the carb which would be enough fuel to run the engine for several minutes or more.

You need to check to see if the fuel pump is indeed pumping fuel up to the carb at a sufficient rate.

Basically, disconnect the fuel line from the carb and extend that line to some fuel container and then try to start the engine (don't drop the height of the fuel line where you spliced any more than needed.

Should get a good flow of fuel into your container.

No or weak flow and the issue is the fuel lines, fuel pump and or fuel filter.

Good fuel flow then issue is not fuel line, pump or filter and then move on to the carb which is most likely where your issue is.

Some carbs have a fuel shutoff solenoid which gets stuck and often the carbs get plugged jet and emulsion tube from sitting unused for long periods of time..

Fair chance you may have carb issues and the carb needs taken off, torn down and well cleaned or replaced if a new one is available.