RE: 140DZ
Cool, that sounds like it could have been it.
I have been seeing this too on the carb bolts lately where an overly tightened carb body has warped the carb and the phenolic plate. Usually it takes a pretty severe over torquing of the bolts to cause this but maybe the engine sitting for a long time and then getting hot and cold hot and cold it just twisted and stayed put.
Let us know how it works out. I'm counting on it getting taken care of for you. Sucks to have engine troubels and not know where to go to find it.
Troy Newman
Team YS