Mercury - Aluminum Power Trim Anode Corrosion Protection Series Aluminum 8M0217561. Overview. When you run a powerful Mercury Verado or Mercury Racing outboard, you're trusting that engine to carry you through long channels, steep chop and those glassy early-morning runs that remind you why you love boating. But all that time in the water also means constant exposure to corrosion-something you can't see day to day but always need to stay ahead of. That's where the Mercury Aluminum Anode 8M021756