I'll try to do this right this time. I have a Craftsman riding mower, Model# 917.255561. I'm not sure what year it is, poss 1987? It has a 10 hp Briggs and Stratton eng, Model# 283707, Type 0217 01, Code 9208244D. I've owned it for 4 years and it has been a workhorse, with minor problems due...