Mercury - Aluminum Anode Kit Bravo III Series Corrosion Protection 888761Q04. Overview. There's something reassuring about launching your boat and knowing the gear beneath the surface is protected. Your Bravo III drive works hard every time you push away from the dock, and corrosion is always waiting for a chance to take its toll. The Mercury Marine part number 888761Q04 Aluminum Anode Kit gives your drive the protection it deserves, whether you're cruising a freshwater lake at sunrise or carvin