My trim won't go up on my mercruiser stern drive. I need to take it in for repair. However it is in the down position, how do it get the stern drive up if my hydraulics won't work?
There should be a screw somewhere near the hydraulic pump which you undo a few turns - it releases the pressure and you can manually lift the leg - hold it up and crank the screw back up. Never had to do it on a sterndrive but have done it on loads of mercury outboards and i imagine the same must be possible on a sterndrive - at least the sterndrive will be lightish - I nearly put my back out manually tilting a 250hp outboard!! Good luck!
the drive is raised by hydraulic rams, to raise it manually you have to slack off a hydrualic union to let fluid out and thus enable the rams to retract,this will let fluid out when you raise the leg so be prepared for a spillage.then put a rope round the drive haul it up and tie it off somewhere on the boat.