This had a 1-1/8" x 2" shaft. If you buy this engine, there will be several different changes that you will have to make. The oil drain on the original engine is in the front cover and on the new engines it is in the side of the crankcase. The radiator has to be removed and the hose barbs are different sizes between these two engines. The wiring will be different and you would be required to use the original wiring harness. You would have to cut off about 2" of the crankshaft.