Yamaha - Engine Anode Corrosion Protection 6P3-11325-00-00. Overview. If you run your Yamaha in saltwater or brackish water, corrosion protection isn't optional-it's part of keeping the motor healthy. The Yamaha Anode 6P3-11325-00-00 is designed to take the hit from electrolysis so the important engine components stay protected. It quietly does its job in the background, sacrificing itself instead of letting corrosion attack the engine's metal surfaces. It's a small part, but one experienced boa