Yea its pretty typical for the engine to stall alot at first because it is running so rich. I know there are several ways of tuning your engine, but i'm assuming you're following the instructions that came with the engine, which is fine. Just keep it nice and rich like the instructions say, and be patient! After a tank or two the thing should start to run a little more consitantly, and as soon as you start to lean it out you'll be in good shape. I started out almost the same as you 6 years ago with a rc--10gt and an os cv-x. My engine is still running strong!