if you have never taken off the bolt in the crank, there is an easy way... take a 15/16 1/2 inch drive socket and ratchet and put it on the crank bolt and rest it on the cradle facing forward in the ratchet reverse mode, then disable the ignition system, and bump over the engine with the starter. It will easily loosen the bolt for you. Just DO NOT FORGET TO DISABLE THE IGNITION SYSTEM OR IT WILL START THE MOTOR AND YOU WILL BE SCREWED. that works for me....
Logan