Well, I guess I am going back to the drawing board and try to get mine to run with a larger prop. I sure don't want to burn my engine up, but I also want to get good performance out of it. I probably have done a little TOO much reading on RCU and started to believe want I wanted to believe. Check out this thread: http://www.rcuniverse.com/forum/m_67...13/key_/tm.htm
It's long, but has info in it regarding the 55, look at post 314 and 325. Now, I realize that these guys are trying to get max performance out of their engines, but I can't imagine that they would allow them to burn up on purpose. Anyway, I'll probably not comment on here again, simply because I am not a seasoned vet of this hobby, and I might give out some bad info. But as I stated earlier, I'm probably just doing too much research, just reading too much. Good luck.