If you have first removed all the other components (cylinder, piston, connecting rod, as well as the flywheel, cone and washer) you should be able to remove it quite easily....you may need to heat it a little with a heat gun, maybe even soak it a while in kerosene. You may need to tap it a little from front to rear with a small hammer..........I did say tap !!!! Try this and post back if you need any further assistance........