4-20HP Square Anode - 875208

4-20HP Square Anode - 875208 This anode helps protect critical parts such as the sterndrive, trim tab, or other metal components of your boat from corrosion caused by electrolysis, helping to prevent pitting and rusting that can lead to costly repairs. Replacing anodes on a boat is crucial because they act as "sacrificial" metals, designed to corrode and dissolve instead of the other metal components on your boat, like the propeller and hull fittings, protecting them from galvanic corrosion which can cause significant damage if left unchecked. Fits:  4-6HP 4-Stroke Carbureted (SN 0R411838 & Above) 15-20HP 4-Stroke Carbureted (SN: 0R0235949 - 0R833819) 15-20HP EFI 4-Stroke (SN 0R833820 & Above)