Egg shaped zinc on the shaft inside the
boat. Slide up so it is partly in the shaft log. Tighten it up.
I heard/read this someplace. Makes sense. I forgot to do it when replacing a stern tube using a build up of
epoxy with the log covered with a release agent. Had to sand the
epoxy to get the angle right.
Chuck Bauer
Island Packet 26 Mk II - 78