Re: Removing mercruiser from boat
Pull the drive first. If you cannot get it in forward gear, you can remove the lower unit first, then the upper - that way it doesn't matter if it is in forward or not.
After the drive is removed, the engine can come out easily. Unplug / disconnect the wiring and fuel. Remove the two rear mount bolts. Unbolt the front mount from the stringer and pull out the engine.