I was having some issues after I was able to get this RC8t running again. 1st it would be really hard to get running, then when it was running it would shut down unexpectedly. Usually around the half tank point. I was also getting bubble in the fuel tube going to the carburetor. This was a bad situation, because if I had air in the lines it would be nearly impossible to tune. Also it meant that the pressure filled tank was pushing air into the fuel line somewhere. I suspect a cracked fuel pickup or internal fitting.
Your guess is as good as mine.