I have a 25 foot Erckson with a swing keel. The boat has been in fresh water until now. It does not have any zincs currently. The outboard is a (1988) 9.9 hp johnson saildrive. It is pulled up when not sailing and at dock.
Where do I need to place zincs to protect the outboard? Do I need zincs for the boat? For the swing keel? If so, where?