Okay, here it goes. The last time I flew, it was doing OKAY. I did have one or two dead sticks, so I turned it out a few clicks. Well, seemed to solve the problem. However, I knew that my low speed needed to be tuned, but I figured I'd leave it be until I went flying again. After some confusion as to whether I should turn the low speed in or out, since it's different for aid bleeds[ countclock to lean]and the other kind (forget what it's called, but you know what I mean. I'm still not sure,") I went to the field to try to get a clean advance. Well, first I wanted to make sure my high speed was correct. So, I started all over. That is, open it up 2.5 times and starter her up. Began to increase, but there wasn't really a terrible increase in RPM. So, I did the pinch test, and , out of frustration, left it when there was an increase in RPM, though I think it was too much. In any event, now the engine would barely go to full throttle. It took a while. So, I turned the low speed in, as someone had told me, but there was no difference. The problem became worse, actually, but I wanted to fly and by this time I was getting pissed. So, I got up in the air, throttled down for some touch and goes, and throttled back up, but it was terrible. What terrible sputtering and coughing. So, too rich, right?!!? Well, okay. Now I'm about to bring her down when my exhaust note changes! What the hell is going on here!? I bring her down safely. My muffler screw came loose and the muffler was just about to come apart. Well, that's my problem, I think. So, I tighten it up the best I can. I start her back up but now the damn thing will hardly advance at all. It's completely 4 stroke. It died, and I was unable to get it going again, so left for home.

P.S. I tried to turn the low speed out, but no difference. When I get home, I am going to try all of the above suggestions. Any help would be greatly appreciated, as I don't want to go back to that lackluster o.s 40 la.