Remove the keel...
If you need to replace the line that attaches to the keel, then the keel has to come off. Study the diagram in the owners manual that shows a cross section of the keel mounting hardware. Under the settee table, remove the access plate from around the compression post. Just forward of the post you will see a bolt. This is the one bolt holding the keel to the boat!The keel is heavy and should be handled by two or three people. The boat must be on a travel lift over solid ground, in order to remove and replace the keel.Once the keel is removed, you can replace the line. Before removing the old line, tie a messenger to the deck end that can be used to pull the new line back through.You may want to call or email Hunter for additional advice. If you have a Hunter Service facility nearby, you might have them do it for you. The travel lift is going to be the biggest cost.Also, while in the lift, replace the ballast tank gasket while you have easy access.Fair winds,Tom