My Poulan 60cc (shown above in Ralph's posting) converted by RCIGN1 runs great! Have one mounted in a Jack Devine P-40 but it has not flown as of yet. The builder is not yet ready to make the maiden flight yet. We have run about one tank of gas through it but I can't remember what rpm's were were getting. He is running a three bladed prop on it. I'll get rpm and prop size and post here soon.