Mercury - Aluminum Power Trim Plate Anode Kit Corrosion Protection Series Aluminum 8M0217563. Overview. Anyone who spends real time on the water knows corrosion isn't something you notice all at once-it creeps in slowly, especially when your boat lives in the elements. That's why having the right anode in the right place matters more than most people realize. With the Mercury 8M0217563 Aluminum Power Trim Plate Anode Kit, you get that quiet confidence that comes from knowing your engine is prote