I have a YS 110 that I have had for about 18 months now. I don't get to fly much, and this engine has only seen about 8 to 10 tanks of fuel.

From day 1 it would not run right,, bog down and drip fuel constantly from the carb.
I got it back to YS, and those guys turned it around real quick, and it seemed to have the issues resolved, as I did a quick bench check, but only for a minute or two.
This is the first time I have run the engine since then, and now I have new problems. The engine when cold runs great, but as it warms up it gets sluggish, to the point it cuts out. When hot it will not restart either, and the only way I can keep it running is at full throttle for a short while. I have checked and double checked all my lines, and also when I release a line the pressure seems very high, I would say too high.
I have made sure that it is not run lean, in fact it is a little rich.
I am running it on Cool Power 15%.

Any Ideas?