Hi
  IF YOUR ENGINE IS A TWO CYLINDER HART PARR IT IS A LIKELY A 36 HORSE NOT A MODEL 36. THESE ENGINES WERE MADE FROM 1927 TO 1936. 252 WERE MANUFACTURED. THE SAME ENGINE WAS USED IN THE 18-36 HART PARR TRACTORS EVEN THOUGH TRACTOR PRODUCTION ENDED BEFORE STATIONARY ENGINE PRODUCTION. THE GOVERNOR HOUSING SHOULD HAVE A NAMEPLATE INDICATING THE SERIAL NUMBER WHICH CAN BE USED TO FIND THE YEAR MANUFACTURED. THESE ENGINES HAVE A 63/4 BORE AND A 7 INCH STROKE. SUPPLIERS OF PARTS FOR THE 18-36 TRACTOR SHOULD BE ABLE TO HELP YOU OUT. IF YOU GO TO DAVE PREUHS'S WEB SITE YOU CAN CLICK ON THE STATIONARY ENGINE LINK AND A 36 HORSE IS ON THE SECOND PAGE. HIS WEB SITE IS <!-- w --><a class="postlink" href="http://WWW.GEOCITIES.COM/HARTPARRTRACTORS/">WWW.GEOCITIES.COM/HARTPARRTRACTORS/</a><!-- w -->          ------ HOOV