O-K I have always gone with the recommended engines in my planes, usually the biggest one recommended. I just bought a SE used. I was thinking about putting a TT 61 in it. Has anybody ever done this or seen it done? Will I be asking for problems? I have never had a 4 stroke engine and know a lot of people use them, but they seem to be expensive and something about having to adjust the things after awhile. Anyway would like to stick with 2 stroke. What do ya'll think about a 61 in a SE? Am I screwing up by not trying a 4 stroke? Thanks for the help.