I have an 2 stroke that starts on the first pull. It idols fine with the choke knob set in the high idol position but as I try to turn the knob down to the low idol position it misses and dies. I have been using it and I have been hoping some marine carb cleaner in the fuel will make it go away. Should I have both carbs rebuilt, continue what I am doing or is there a part or 2 I can replace in thecarbs to fix the issue. Thanks for any help.