Max's boat repair manual states:
Engine removal proceedure....
1) Attempt to remove engine from boat using ordinary tools. If this is not possible see step 2.
2)Use sawzall, chainsaw, or similar overkill device to remove boat from around the engine while laughing hysterically and screaming "That's right biotch. How ya like that shit huh? as you manically saw through the transom and floor in a hail of fiberglass and wood chips.
WARNING-Step 2, may damage the boat beyond repair and it can be expensive, but it is immensely satisfying knowing that you have won the fight.
thats funny right there..........................
I ran into the same problem when I pulled my engine the engine brackets attached to the stringer would not come out. I finally poured a bunch of liquid wrench all around the bolts and let it sit overnight then using a BAH(big ass hammer) and a punch they came out. Then I plugged the holes with wooden dowels and redrilled to reposition the engine and used the setup with the angle bar shown in the picture. The bar should keep the holes from elongating.
Barry
http://www.***boat.com/image_center/...tparts_021.jpg