I haven't pulled off these carbs yet, so I don't know how they're configured, but what I know DOES work, if you can get just the carb by itself, is a can of carb cleaner that is made for dunking the carbs. It looks like a paint can, you can get it at most any car parts store, and you MAKE SURE YOU TAKE ALL NON-METALLICS off the carb, then drop the whole thing into the little parts basket that comes with the can...leave it there 20-30 mins, and it comes out like brandy new! I've used this on several lawnmower carbs, and it works like a charm.