I concur with some of the other posts. That little Magic was designed for a .40 sized engine. That O.S. 61 is too much! Probably has something to do with your problem. My buddy has this plane, and I've flown it several times. She'll do almost anything I can throw at it with a Super Tiger GS .40. We hand launch all the time, and she just takes right off out of our hands. Good Luck finding a solution!

Doug