Fuel Pump & Gas Filter for Onan Mobile Genset 4KY

When you push the prime button, do you hear the pump? Is there voltage to the pump? If you can hear the pump, attach a short hose to the inlet and see if the pump will suck gas from a gas can.
Did you remove the filter and try to blow through it?
Your post indicates that you are just trying to throw $$ at your generator instead of trouble shooting the problem.

Richard