Ed you may have solved the problem. The nipple was semi clogged. I would have looked a long time before I checked that. I will try the motor tommorow because right now I am dieing from a cold. I took the muffler apart but couldn't find what was plugging the hole. I sure hope that fixes it. Like you I have owned 3 TT GP42s and they have all been very good motors. The little Tower 40s were also good dependible engines.

I love the simple air bleed carbs. Once you know how they work they are the most dependable carbs you can get. At least to a point.