Mercury - Quicksilver Aluminum Anode For MerCruiser Bravo I Bearing Carrier 806188Q01. Overview. Every Bravo I drive needs protection against corrosion, and the Mercury Marine 806188Q01 Quicksilver Aluminum Anode is designed to do exactly that. Mounted at the aft end of the bearing carrier around the prop shaft, this anode shields the gear case from galvanic corrosion - the kind of unseen damage that can ruin a drive over time. Built from high-grade aluminum and tested to military specifications