This custom machined brass replacement sheave mounts in a bracket located at the top of the keel trunk. The sheave is mounted in the first block that the keel cable (or line) enters directly above the keel.
The bracket that supports this sheave is mounted to the top of the trunk by two machine screws. The machine screws thread into holes that are tapped into a plate glassed into the top of the keel trunk.
This part number supplies the brass replacement sheave and bushing only for use in your existing bracket.