My engine runs than kills, the bulb goes soft and when pumped up sounds like it is pumping air back into the tank. I changed the conection between the hose and tank cause i found a cracked O ring. Tried a different hose, it ran fine then started the same problem. I'm thinking water in the carb before I go in to them, wich would work best Sea Foom or B12 Chemtool MEK.

