Mercury - Quicksilver Aluminum Anode For MerCruiser Alpha One Gen II Trim Cylinders 806189Q1. Overview. Saltwater, freshwater - corrosion doesn't care. That's why the Mercury Marine 806189Q1 Quicksilver Aluminum Anode is designed to keep your MerCruiser Alpha One Gen II trim cylinders protected from the constant threat of galvanic corrosion. Mounted on the trim cylinder arms, these anodes act as the first line of defense, attracting corrosive elements before they can reach your drive's metal com