Mercury - Magnesium Anode Kit Alpha One Gen II Series Freshwater Protection 888755K01. Overview. When you spend your weekends on quiet freshwater coves or running long channels with the family, you learn quickly which parts you can trust. Your sterndrive is the muscle behind every smooth start and every easy return to the dock, and protecting it from corrosion isn't something you leave to chance. The Mercury Marine part number 888755K01 Magnesium Anode Kit gives your Alpha One Gen II sterndrive