This has a 1" x 2-1/4" shaft on it. The newer OHV engines are wider than the original L-head engine but should fit. If you purchase an engine with the 3/4" diameter shaft, you will need to purchase the sleeve-34-1x220 to take the shaft up to 1" diameter. If you purchase one of our engines with the step shafts, you will have to purchase a sleeve-78-1x220 to make the shaft a 1" diameter shaft. If your key stock is built into your pulley, this sleeve will not work for you.
