Re: Cap removal
Most boats use bedding compound of some type to fill in any gaps there may be between the transom and the cap to avoid any stress cracks in the fiberglass once the motor is installed.
You can cut it with a sawzall or one of the vibrating saws everyone has for sale for prices from 39 bucks at Harbor freight up to a couple hundred from the original Fein product.
Once you've gotten the majority of the bond cut, then from the inside, use a jack and some supporting wood to displace the pressure and slowly jack up the splashwell. You don't want to put so much pressure that you end up damaging the cap, but you want enough pressure that when you get back in to cut and chisel out the rest of the bond, it will eventually "pop" free.