Mercury - Aluminum Anode Kit MR & Alpha One Series Aluminum Protection 888756K02. Overview. Every boater knows that the time you spend on the water has a way of grounding you. The quiet moments drifting over glassy water, the long runs across open lake, even the slow crawl back to the ramp at sunset - it all depends on your gear working the way it should. And part of that reliability comes from parts you rarely think about but absolutely depend on. The Mercury Marine part number 888756K02 Alumin