Re: 1964 Evinrude 9.5
The weight of the motor (resting on the flywheel and towel) is usually enough resistance to the back and forth turning (giggling-if you will) of the driveshaft. You'll be turning the shaft only about 1/8 of a turn, or less, each way. You shouldn't be able to develope enough force with pliers to strip the broached crank shaft end or strip the drive shaft splines. Soak the shaft/crank junction with PB Blaster and let it do it's work. Your not in a race, this can take some time, but it should break free.