Tecnoseal Aluminum Split Collar Anode f/SD20, SD30, SD40, SD50 & SD60 Yanmar Saildrives

The Tecnoseal Aluminum Split Collar Anode for SD20, SD30, SD40, SD50 & SD60 Yanmar Saildrives is essential cathodic protection for any serious sailor operating a Yanmar saildrive in saltwater or brackish environments. This anode is designed to fit directly onto your saildrive shaft, protecting your transmission and lower unit from corrosive elements.

Constructed from aluminum, this anode sacrifices itself to prevent galvanic corrosion, which can damage metal components when dissimilar metals come into contact with saltwater. The split collar design allows for tool-free installation and removal, making it convenient for maintenance while your boat is on the mooring or during haul-out.

Anyone operating an SD20, SD30, SD40, SD50, or SD60 Yanmar saildrive should inspect their anode annually, especially if spending significant time in saltwater. The recommended replacement interval is every 2–4 years, depending on water chemistry and usage, making it a cost-effective solution compared to more extensive repairs.