The reson I asked this a friend of mine was telling me they fiqured out the rotation on a engine from being behind it and I new it was wrong. My engine is from some type of chain saw that I know and it turns counter clockwise. I have been flying R/C for along time. I guess I used the wrong forum to post and should have worded it a little diffrent The conversion I was refering to was they alredy done the flywheel and put a prop hub on the unit. Sorry I botherd you folks. Again thanks for your answers. Wont ask again! Jim [&o]