I just bought a 1993 350L 2x4. The machine starts with difficulty when it's cold but will not start at all when it warms up. There is fuel getting into the cylinder and spark at the plug (although it seems weak). Anyone have any ideas.

 

Start with a compression test,have the ignition output tested with a kilovolt tester,if this all checks out you will have to dig into the carb.

 

Boris, A 2 stroke with spark and fuel that won't run is a rarity. I would start with a new spark plug. Then move up the ignition system from there. Ray Card '93 350L