Yamaha - Engine Anode Corrosion Protection 6AW-1132P-00-00. Overview. Corrosion protection is one of those things Yamaha owners learn to stay ahead of, especially in saltwater. The Yamaha Engine Anode 6AW-1132P-00-00 is designed to absorb electrolysis before it can damage important internal engine components. Instead of letting corrosion attack cooling passages and metal surfaces, the anode sacrifices itself first. It's a small maintenance item, but one that quietly protects the engine every tim