Home Engine Systems Engine Care Anodes Magnesium Anode – Mercury/Mercruiser (R/MR/Alpha One, 1983-90) Sierra International Magnesium Anode – Mercury/Mercruiser (R/MR/Alpha One, 1983-90) $55.19 Magnesium Anode – Mercury/Mercruiser (R/MR/Alpha One, 1983-90) quantity Add to cart Product Details Product Details Magnesium. For use on R/MR/Alpha One (Sterndrive & Transom Assembly 1983-90). Replaces: 43994A2, 821631Q1.
