usually you can find a place to use a lever or crowbar on the frame or structure, have some one apply pressure, while you slip a block or pair of wedges under.
You will need to at least loosen the other mount on the side you are working to get movement. Other boats may have a shelf/tray or other structure that you can use as a lift point to do the coffin hoist.
best of luck
You will need to at least loosen the other mount on the side you are working to get movement. Other boats may have a shelf/tray or other structure that you can use as a lift point to do the coffin hoist.
best of luck