The last time I exersised the generator, it quit after about 15 minutes. I started it back up and ran for about 10. It acts like the fuel filter needs changing. Simple question is is the filter fairly accessable? It's winter and I really don't feel like working on it in the cold. Oh, yep, full gas tank in the RV.
The filter should be right in the front where you see the fuel lines. Mine is an Onan. Simple thing to take apart. You might first open the screw on the bottom to see if fuel comes out. If not it could be the fuel pump. My pump was underneath of the left side, also an easy replacement.