Onan fuel pump or carb

For integrity of the topic, I would refer back to Harley-Dave's post. Part of the issue - which I also had - was the pump would overheat and stop pumping fuel. You could hear the engine starving for gas and the line was dry. Just doing what RJsFishin described may not replicate the problem sufficiently to provide accurate diagnosis. My pump would function for 4-6 minutes before overheating and engine quitting. There may also be some effect of having the engine running (ie., creating heat) as opposed to just priming for 2 mins in the scenario he suggested. Good ideas RJsFishing, but I am just throwing some more info out there.