choke off mower runs rough / honda hrb215 /
Only runs smooth with choke on. When throttle posistion is full, choke off, runs really ruff. Smooths out when I put the choke on. Even though the engine has warmed up. Any ideas or suggestions why the engine only runs smoothly with the choke on. I have taken air breather off, and can visiually see the butterfly on the carberator is in the choke posistion. When it is moved to the fully open posistion, it runs like crap. Please, any ideas, or feed back would help.