I have previously owned larger sailboats and knew how and when to combat electrolysis using zincs (prop shafts, etc.). I recently purchased a trailerable Hunter 23 that has a fixed steel winged keel and am now going to leave it in the water (Chesapeake Bay). However, I am concerned about the electrolysis factor with regards to this steel keel and generally if zincs are required, there is a generally a place designated to attach them, but not on this keel. Here are some factors: (1) The outboard motor has a zinc attachment; (2) There are no thru-hulls below the waterline; (3) The mast is grounded to one of the keel bolts. (4) The two batteries are grounded to each other and not to any part on the boat (i.e., thru-hull fitting); (5) Other than the keel, itself, and the outobard motor, there is no other metal below the water. My question: Do I need to install zincs, somehow, on the keel? The boat is currently out of the water in a boat yard getting a barrier coat put on the never-before-painted bottom and bottom painted. It is to go into the water on July 16. Please email me directly at rwpoole@comcast.net if you have some knowledge on this subject. Thanks.