Tecumseh Ohsk70-72523e 7hp Horizontal Shaft Engine UsedTecumseh OHSK70-72523E 7hp Horizontal Shaft Engine. Runs on fuel sprayed into carb, may need carb work. Crankshaft is 2 1/4” long X 3/4” O. Has reverse shaft 3/4” long X 1/2”, can be sawed off if not needed. Ships with out oil. The item “TECUMSEH OHSK70-72523E 7HP HORIZONTAL.