The Tecumseh Cast Iron engines are no longer available. The Tecumseh HM80PTO and HM100PTO are the only engines that will work right on that tiller with the two shafts on them. If you are willing to give up reverse on your tiller the OHV engines listed here would also work on there. This tiller has a two groove 2-1/2" diameter pulley for 3/8" belts on it, if you get a new pulley to fit the engine with a 3/4" shaft it will work as well.
