I had the same problem with my Evolutions .46. The first day was fine. But the next day it kept cutting out 2-3 minutes into flight. On the ground no problems after running for 2-3 minutes. I ended up ritchening it about 4 clicks and the problem when away. Contitions of flying site: I fly in Utah and it was a cold day and the elevation is 5000 ft. I also took the damperner out of the muffler just to see if it would help, at 5000ft we need all the power we can get.

Mike