Kfarlee,

I just bought an O.S. 46FX too. Mine does the same thing. The manual tells you how to determine if you're rich (white smoke comes pouring out once the engine clears out) or lean (absense of smoke altogether). Mine is rich and I need to adjust it also. I thought I'd wait till I have run it for a while so it's through it's break-in period. One thing that bothers me is that the engine could quit if I hit the throttle to hard while I'm flying, and then may have to make a bad landing. It hasn't happened yet but it could. The next time I fly, I'm going to lean out the mix just 1/8 of a turn and see if it improves. O.S. is being safe with their settings but it could take out my plane instead of their engine.

Again, the manual has the instructions to set this. I agree with the guy who said to wait a long time between adjustments. Very good advice. It could get way out of wack doing one after another. Mine is pretty close but needs an adjustment.