If you have to get back into the carb the "emulsion tube" is in the main fuel passage. It is held in by the main jet. After removing the main jet knock the body straight down against a block of wood. The tube should drop out.
Clean everything well. Make sure that the main jet is clear.
I use a set of welding tip cleaners. Starting with the smallest and working up until the next larger size will not fit. Go easy but make sure that it is clean.