Mercury - Anode Corrosion Protection Aluminum 8M0137344. Overview. Every boater knows the quiet comfort that comes from heading out with a motor you trust-one that starts clean, runs steady, and keeps you moving without hesitation. A small but essential part of that reliability is knowing your engine is protected from corrosion, especially if you spend time in water that's less than gentle on aluminum components. The Mercury 8M0137344 Anode is one of those behind-the-scenes parts that gives you