Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Have you tried to remove it? The outer cover has to be removed, then the single bolt and washer , that goes into the end of the crankshaft is removed. There is a key on the shaft, but it should not keep fan from pulling off. There are some grooves in the shaft where a small puller with two or three legs can grasp and pull the fan off if needed.