Hey everyone. I'm trying to drop the lower unit on my 1991 200 HP mercury outboard. I have all the bolts and nuts off including the one hiding under the zinc on the cavitation plate. The most the unit will come down is just enough to work a putty knife in there and that is it. It's acting like it's still bolted in place. It doesn't wiggle one bit. I'm certain all the bolts are out. I don't want to risk busting the case by prying on it. There is almost no corrosion on this motor. I'm guessing either the studs have some corrosion around them. Or the drive shaft is corroded in place. I doubt it is the shaft since there is ZERO side to side movement. I soaked it all down with PB Blaster last night and let it sit. I may try to work in some wood or plastic wedges next. Has anyone run into this before? Thank you! 
