Ice,

I'm using cool power 15% for fuel. The engine doesn't like to idle. The high speed is tweak to max RPM when I hold the airplane vertical and then I tweak it back a little to keep the engine cool. You will see a small smoke trail when you throttle up. So I think I got that side set up well. It's the low side that is giving me trouble. It spits fuel right back out of the carb which should be an indication that the low side is to rich. ( I think) So I try to lean that out a little and it just dies. I'm going to tear it down and give a good cleaning, replace any bad seals or gaskets.
But you thought of the bearing being shoot has me agreeing with you. I noticed I have extra play allowing the crank shaft to slide in/out of the crank case. I will check the bearing and replace.

Thanks for your thoughts,
Tim