Thanks for the replies guys.

The carb dripped before I ever took the regulator apart and yes, I think I put it back together right.

Yes the screw is flush and I have tried turning it in or out with no affect.

Engine is far from overheating, it is barely warm after a flight. If I lean it out I just get more power, but nothing changes!

Valves have been adjusted.


I am using the muffler that came with the engine and I have not taken the baffle out.

I figured I would have to send it in, but I am doing whatever I can to prevent that! I'm sure YS repairs aren't cheap!!

Any other ideas?