Honda Engine Surging, I Cleaned and Cleaned

I have a craftsman Lawnmower with a Honda Engine, The engine is the standard Honda engine that is installed on many of the store brands. It is the 160 cm engine. The engine starts with 1-pull and runs great once the choke goes off the engine starts surging and stumbling. I did remove the center jet and cleaned it, Did not Help. I can not see any other jets or settings. One other note before removing the center jet I noticed it covered half of the side hole (where the jet screws in) What am I missing or is it time for a new cab. The lawnmower is only a few years old.