I'd be willing to help you rebuild it in person, but I'm bettin' you're not any where near Racine, Wisconsin. There are a lot of tiny pieces inside the carb. If not reassembled properly, it will not work right. Period.
Before tearing it apart, do you know anybody that knows anything about carbs? It would be nice to have someone nearby that does, for guidance, if nothing else. If you're determined to do it yourself, follow the advise already given. Go slow, take pictures, mark bags and put parts in them. One tiny little washer not in the right place, or like OF said, a slight bend in the float assembly, and the whole project goes in the crapper.
Good luck.