[chumbucket]

Unfortunately, this is a very common problem if the bolts haven't been removed for a couple of years or if Never-Seize wasn't used on the bolt threads before installation. Heating the case of the lower unit is usually the method I've seen used. Sucks because you'll have to repaint the unit afterwards. Also, for loosening frozen bolts, a product called Kroil is best for that. Sorry about your luck.