IT is a 18hp onan with a coil and I was told the part # was AM118196 was not sure and I hope that the pistons are 10.000 over also need 2 ex. valves+gides the old valves mesuers 1.120 head diam 4.730 length piston has a # stamped on inside 112-0164 ALSO HAS A HEXEGON WITH 83 INSIDE that is all the info I can find sorry and thanks for your help I ame surprised that onan cant help more, realy wulde hate to junk this tractor
