I do not know this!? It did actually cross my mind earlier trying to swap electric motor with hydraulic one but just figured it wouldn't be worth doing as it would be a ball ache finding the right size motor tht will actually fit with the correct shaft etc etc. then working out exactly how many cc motor I need so that u don't end up with a winch that does a snails pace.
I have h14 winches and fairy winches I can put a motor on but I need something with online motor and planet gears like milemarker as it needs to be compact
Any ideas u have would be appreciated though