Sounds like the main problem is a major bog with backfiring after a few (or more) seconds at full throttle. That points to the fuel pump like I mentioned on the first page of the thread, especially with the description that was quoted by Jim (thanks, Jim!).
You're welcome. Someone needed to bring to discussion back down to Earth. It was obvious to me that he was 'running out of gas'. Which could easily be a low float. But this would depend on how the problem 'presented' itself. Which I haven't heard yet. Did this problem come up all of a sudden or did it manifest over time? Or was it something that came up when you pushed the engine a little harder than usual?
