[cbreez]

I just make sure a good gasket is on there and you won't have a problem with a snug turn of the screw...I have the same.
If you really are still having a problem an easy fix would be a touch...just a touch of silicone on the carb gasket...or just two gaskets.

Keep it simple...an Okie should know that!

BTW, I was an Okie so I can say that!