I just installed a refurbished Python AFM however it is running rough and quite smoky on startup so I assume the mixture screw needs adjustment. Does anybody know how many screw turns from fully closed to get it in the right ballpark? I would use my old one as a reference but there's a cap on it I can't seem to get off.

 

This is a 1985.5 stock 944 by the way.

 

Run it down, then back off 1.5 turns.