The tank is in a tower hobbies trainer so there is only one place for the tank. Wether or not it is in the right place I don't know.

I do have some more info to work with. The priming problem seems to only happen when the engine gets warm. I went back out to screw around with it some more and it was cool, it primed fine. Ran OK up to half throttle and would then die, no sputtering. It would die like flipping a switch. At this time the engine was warm and it would not prime again.

I will start checking for air leaks. I did not notice any bubbles in the fuel line while running.