This would be on the mower in the avatar, 110982 4 hp Briggs, on the third or fourth diaphragm carb, and numerous replacement diaphragms. Have another old mower with a 12 cube flathead with the standard float carb, never a problem. Like to round up a float carb with a choke and the gas tank on the top shroud, fix it once and for all. Just wondered if anyone had ever done this, seems possible.