Mercury - Aluminum Anode For Bravo, Blackhawk & Vazer Drives 806190T1. Overview. Keeping corrosion under control is key to extending the life of your sterndrive. The Mercury Marine 806190T1 Aluminum Anode is built to do exactly that - protecting your MerCruiser Bravo, Blackhawk, and Vazer drives from galvanic corrosion, whether you're boating in fresh or saltwater. Mounted on the trim cylinder arm or rod, this OEM anode takes the damage that would otherwise eat away at expensive metal components