Hi Norm and Tyler
I would have a lot of trouble removing a seized boss with a 2 leg puller but with a 3 leg puller with a lot of tension ,then
place one side of the boss on a solid bit of metal like an I beam or train track etc,then I use a 3/4 brass drift as a punch,
you hit the brass drift on the opposite side of the boss when it's on the solid metal I beam and a few blows of the hammer
and the boss will move then retension the puller and few more hammer blows will move the boss some more.
The only problem is occasionally if you hit too hard and the boss is cast iron you can crack the boss.
If I don't care about the motor and want to make sure the boss is saved I would just heat the boss red hot with the oxy
then it would easily tap off the shaft.
Seeing that the shaft is cut and the inner thread is stripped ,I'd be soaking the shaft and boss in white vinegar.
Buy a 2 litre bottle of vinegar ($1.40) at any supermarket and soak the crank and boss for 2 weeks in a cut open 2 litre bottle.
I did this to free a rusted V8 gudgeon pin that was rusted for 40 years , it still needed a little heat with lpg but was the easiest way.
Cheers
Max.
