Onan 5500 Generator in Holiday Rambler 1998 Endeavor

dalefuji,

Did you replace the gas line from the fuel pump to the gas tank?

If it ran when you primed it, you filled the float bowl with fuel and that allowed the generator to run for a short while. But with a leak in the line between the fuel pump and the gas tank, fuel can't be sucked up fast enough and the engine will stall.

One way to check is to take a line from the fuel pump into a separate gas container and see if the engine will keep running then.

Good Luck,

~Rick