Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 6Get this manual
small zinc plate will cause more rapid deterioration of the metal you- are trying to protectIf in doubt, consider the fact that is is far better to replace the zincs than to replace planking or other expensive metal parts from having an excess of zincWhen installing zinc plates, there are two routes availableOne is to install many different zincs on all metal parts and thus run the risk of wood burningAnother route, is to use one large zinc on the transom of the boat and then connect this zinc to every underwater metal part through internal bondingOf the two choices, the one zinc on the transom is the better way to