Pre-filled with oil, no maintenance. From Main Center Shaft to each mount bolt is 1 7/8 - Center to Center. Spacing Between Mounting Bolts is 2 5/8- Center to Center. Fits 3/4 Horizontal Crank Engines. Mounting bolts & Key way are not included.
Will also fit many other brands including Karcher, Genrac, Blackmax, Craftsman, B&S, Honda, Powerstroker, and More...