Mercury - Aluminum Anode Kit Corrosion-Defense Series Cast Aluminum 8M6007985. Overview. If you spend enough time on the water, you learn quickly which parts quietly protect everything else. Anodes fall into that category-small pieces of metal that stand between your engine and the slow, grinding damage that saltwater can deliver. The Quicksilver 8M6007985 Aluminum Anode Kit is one of those parts that gives you peace of mind. When you know your Yamaha outboard is shielded from galvanic corrosion