Joew: New rings, new needle valve, carb soaked and cleaned..start it up and it does the same thing. Loads up spark plug. Previous owner gave me a carb as a spare maybe he knew more than he was telling. I put carb cleaner on the reed and it didn't leak. Man I am running out of ideas. Wifey thinks I am nuts spending all the hours on this thing. Well I am at the point where maybe I should put on the other carb?