Consider a bipod made from two spars, guyed fore and aft, with a come
along or chain falls to lift it.

Make sure the bottom ends cannot skid anywhere, or punch through the
deck. You can then move the lifted engine sideways somewhat by easing
off one guy, so the bipod top moves fore and aft, or sideways if that
is how it is oriented. Don't stretch it too far, or the whole thing may
collapse. You could probably pass the engine over the stern this way,
perhaps into a big dinghy.

Strip off all ancilliary parts before hoisting, starter, manifolds,
alternator, etc.

I have used the main boom, but that wouldn't apply to a stinkpot, er I
mean a now stinkless pot;-)

That block will weigh 2 -3 cwt. The shipping weight of the replacement
will be a guide.

Terry K