zincs and zinc savers
Hunter has been installing the zinc saver as standard equipment for at least several years. One additional note on the shaft zinc- make sure you place it at least 3-4 inches ahead of the cutless. This will allow good water flow through the bearing, which should help it last longer. As far as I know, every 410 has come equipped with the fresh-water-cooled Yanmar, which does not have any internal zincs. My biggest piece of advice on zincs, stray current and galvanic corrosion is to avoid leaving the boat plugged in to shore power all the time. Your next door neighbor can be your boat's worst enemy...