Zinc Anode (Mercury/Mercruiser)Skeg Under Anticavitation Plate · Use magnesium anodes in fresh water applications · Use zinc anodes in salt-water applications . Replaces mercruiser number 31640, A1, Q4 . For use on R/MR/Alpha one sterndrives(1983-90)& prior drives. Alpha One Gen.II(1991& up) These should be replaced every other year or whenever they get very corroded. There purpose is to be sacrificial. Stray electric current in the water will distroy these instead of your outdrive or prop.

E-mail a friend about this item.

Return to Catalog