Mercury - Aluminum Anode Plate Corrosion Protection 35-300HP Outboards & MerCruiser Drives 76214T5. Overview. If your boat runs a high-rake propeller or performance setup, you need corrosion protection that fits without getting in the way. The Mercury Marine 76214T5 Aluminum Anode is a flat plate anode designed to fit neatly into the anti-ventilation plate cavity on a wide range of Mercury and Mariner 35-300HP outboards, as well as Force 90-100HP (1995 and newer) and MerCruiser Alpha One Gen II