Ok, here's an update on the status of my engine. I printed up all of the advice that was given to me and used it while I ran up my engine in my backyard. I think my mixture woes are finally solved. I did the pinch fuel line test and looked for the correct thing the engine should do when its at the right mixture. I pinched it for just a second and it sounded like it was suppose to. I believe an increase while being pinched, then when I let go the rpm goes down a bit but then returns to normal. So I think that's right I hope. I get a pretty clean transition from idle rpm to high and the engine seems to sound pretty good when it runs. Its not running rough or anything.

I checked my fuel lines for leaks and no problems there. Check my fuel tank, no problems there. Possibly a problem with the bubbles I was getting before was that the screw on top of the seal cap where the fuel lines go into the tank was not getting a good seal because the screw was not in enough. I tested it by blowing into the fuel lines and air would blow out from the cap rim. So I tightened it and no more air comes out. I get a good seal now. So hopefully my bubbles will stop now.

But now I have another problem that I can't really figure out. I can't seem to get my engine to idle right without it dying on me. What happens is when the throttle is set at idle (at the bottom) the engine idles right but it won't sustain the idle. After a few seconds, the rpm will decrease and the engine will start to blubber and then die right away. The only way to keep it from dying on me is to increase the idle but now its idling to fast and that's why I crashed last time was because I couldn't land because the engine was idling too fast, so I had to reduce it to the "right idle" but then it won't sustain it, it will just die. I tried adjusting it with the airbleed screw, but it doesn't seem to be helping. I have it screwed all the way out, which I was told was suppose to help it idle at a slower rpm but its not working so I'm thinking I may have to drill the hole bigger. Will this work? Exactly how much bigger do I make the hole? I don't know what exactely what the right idle should be, I just sorta know by sound because that is the only way I can really tell from before when I never had these probelms and my engine would idle and not die. I want it though so that when the stick is right at the bottom, it idles right and the engine won't quit but the only way it will stop is that if I bring the engine trim right to the bottom but I only have to have it half way for the engine to quit. This seems to be my only problem for now.