i need to find out the model number of a mower so i can buy parts.the model number was on the undrside of the seat. i bought it used and seat had been replaced... the information i do have is that it is a mower called yard machine by mtd..its a riding mower. 12.5 hordse power 38 inch cut.6 speed.it has a briggs and stratton engline the information on the engine is..model 28v 707..rype 1170-ei. ..code 980518zb