Ejay, do you have a water separator/filter at the tank end AND a polishing filter between the fuel pump and carb. If you don't install them. These will filter out most any gunk detrimental to the carb. It does not take much gunk to foul a small carb as the orifices' are smaller than larger carbs. The carb should be thoroughly cleaned judging by the look of the stuff in the throat of the carb.
Dave Neptune
