ORIGINAL: GreaTOne_65
Thanks, for the info, truckracer. I couldn't remember which number it was, figured somone would set me straight. If it is 45, it's a 3.7 and will never turn a 24X10 in the range it should, maybe a 22X10 would be more to it's liking. Actually, any engine that doesn't run in the 7,000 rpm range isn't propped in it's power range, that's my opinion.
As Truckracer said it is only 53 cc. It is not a 3.7 it is a 3.2
More of a 22 X 8 and maybe a 22 X 10 engine.