Yes I guess I was running way rich, but I don't have too much experience with gas. Maybe this makes sense, since I was only taching 5100 with a 3W 32x10. I was told these engines with cans should be running around 6K. But the tach is a 6 year old glow bee little pee wee tach I didn't think it was right, because I don't see how it could be that much more powerfull - my 2 buddies standing on each stab half have freakin line bruises on their calves from doing a few full throttle pulls - much more powerful than my 3W140. The first flight of my 40% 3W 330S is today!