Cutlass bearing
Did the one one my O'day 30. I couldn't pull the shaft, the rudder prevented it. I was planning on rebuilding the transmission so I pulled it. That let the shaft push up inside the boat and just out of my way. The old cutlass bearing was not budging. It turned out that it was lock-tited in. I used a fine hacksaw blade to carefully cut through it. I fed it through the bore with tape on both ends. Once through, I used a small wood chisel with the corners radiused to peel it out. You have to be careful installing the new one. If the bore is tight it might fold up on you, they are very delicate when sticking out. If you know a machinist who can make you a pilot that would help. If you can get it on the shaft and use that to start and align it.