This 40 used to be a great engine. It's been sitting in my garage for about 2 years and I just found a home for it, but I can't get it to run properly. No matter what I do the tuning is inconsistant. Btw I have experience tuning engines but this one is giving me hell.
So far I have:

checked fuel tank and clunk lines for leaks
added more foam padding
replaced fuel lines
replaced HS needle valve
checked carb O-ring for damage
made sure carb was tightly in place
tightened every bolt

AND STILL HAVE THE SAME PROBLEMS.

I decided to tear down the engine and noticed that the rear bearing is burnt orange. Maybe this rust is my problem but I really didn't notice any classic signs of bad bearings. No play in the crank shaft. Engine ran pretty cool to the touch. And I never noticed the prop feeling "notchy" when turning it over. But honestly this is the last thing I can think of that might be my problem. Any thoughts would be great.

AND PLEASE ONLY REPLY IF YOU HAVE EXPERIENCE WITH THESE ENGINES. NO EVOLUTION FLAMING PLEASE!!!!!!
I've never had any problems with these engines until now.