Trying to figure out what i have to order parts for it. It's a Briggs OHV .numbers on the valve cover are 120412 0139 E1 . I looked on B&S site and i came up with 2 motors with that number. one is 205CC and the other was smaller.can't remember what the cc was on that one. anyone know how i can figure this out.. air cleaner cover just says 7hp.