I removed the carb and cleaned all the holes in the carburetor including bowl nut with twisty wire, needle and carb cleaner. The throttle butterfly shaft moves up and down a little but I dont see any wear or problem with it. I mounted the carb and when I primed I saw gas coming out of the jet better than before. In installed everthing and after 3 primes the mower started without any problem. Now it runs like a charm without any surging. Saved some $$$$'s as well as I learned on how to keep the mower in a good shape.

Thanks again Bob.