We used a chain hoist to get the engine in position under the main hatch
I had measured carefully and so knew that the exhaust
manifold and the alternator
had to come off so it would fit through.
I used Polaris Marine
for the lifting They were very professional and had clearly done the same job many times. Considering just how critical the job is I considered them to be money
well spent. They did have a large boat specifically built for the job.
They always checked for incoming waves before each lift.
In a comparison of a rope
hoist and a chain hoist the chain hoist has minimal give so can be very precise, while the small number of times I tried to move the engine using rope
there was too much give to be effective.
I spent a lot of time considering the best way to remove and install a 500kg engine/transmission.
Do remember that if it goes wrong someone could get badly hurt...