ORIGINAL: heavythumbs
It seems to load up at 1/2 throttle starts to smoke a bit then after full throttle for 10-15 seconds it clears out and really flys great untill I back off the throttle again. There was a guy at the field trying to help me get it tuned up but I think he had a harder time tryng to figure it out than I did!!! Oh well at least he tried.
I ended up getting 4 6-10 min flights out of it before leaving for the day. Any ideas on if it is a cooling issue or just tuning thing.
Thanks, J
Heavythumbs,
I think you need to lean out your idle mixture a bit. The symptoms you describe are exactly what my manual (O.S. 46AX) describes, plus it just makes intuitive sense.
BTW, I'm getting a light/part throttle surging which I think is the opposite problem. I will adjust my idle mixture screw out just a bit and see if that solves it.