Tecnoseal Zinc Wedge Anode f/35-300 HP Mercury/Mariner Engines

The Tecnoseal Zinc Wedge Anode for 35-300 HP Mercury/Mariner Engines is an essential sacrificial protection component designed to shield your outboard motor's gear housing from corrosion and galvanic attack in saltwater environments. This anode is crucial for anyone operating a center console, sport cruiser, or commercial fishing vessel, as it intercepts destructive electrolytic action that could compromise aluminum and steel components below the waterline.

Constructed from high-purity zinc alloy, the wedge design mounts directly on the side of the gear housing just above the cavitation plate. This positioning allows it to sacrifice itself before corrosion reaches critical bearing surfaces and internal gears. Zinc's lower galvanic potential makes it the preferred anode metal in saltwater applications, as it oxidizes preferentially while protecting the more noble alloys in your powerhead and lower unit.

Maintenance-minded boaters and professional operators recognize that replacing the zinc wedge anode annually—or every 100-150 saltwater operating hours—is vastly cheaper than repairing corroded components. This anode is specifically designed for Mercury and Mariner outboards, ensuring reliable protection across the full 35-300 HP engine range covered by Mercury's original equipment specification (part number 826134).