Honda motor on a craftsman pressure washer. Old carb's choke "clicks" open or closed using rod that you manually push or pull and causes a tiny post sticking up from the carb's body to put pressure against the choke flap's armature, keeping choke in position. Replacement carb has exact same model number but has no tiny post on the carb body and the choke armature is spring loaded. How do I find correct part when the numbers are the same? Thanks!