I have a TT Pro-46 (with a Perry Carb) that I run 10%N (18% synth, 2% Castor lube) and it turns an 11X5 APC to 13,200 (on my optical tach) with 200 rpm backed off on the rich side for PMS (Piston Margin of Safety ;-)). It's a snotty little engine. I bought mine in the spring of 2002 and it has outlived one plane (hence the replacement carb) and been flown successfully in three others for various periods. I've run mostly 11X6 and 11X5 props, for pattern and IMAC style. Currently I have it in a 4-1/2 lb Goldberg Hot Stik and it is ballistic. I may have to try one of those 12 x 4 props.

300º sounds about normal?!? I don't have a way to measure but in reading what others are finding in other forums that is a normal number for .40 to .60 size two-strokes.