Mercury - Quicksilver Aluminum Anode Corrosion Protection OptiMax 200-300HP Outboards 76214T1. Overview. Saltwater can eat through metal faster than you'd expect, but the Mercury Marine 76214T1 Quicksilver Aluminum Anode is built to take the hit so your engine doesn't have to. Designed specifically for Mercury OptiMax 200-300HP outboards, this OEM anode provides long-lasting protection against galvanic corrosion. It's made from high-quality aluminum that performs better than zinc in both saltwat