Complete magnesium anode kit for 1984-1990 Mercruiser MR & Alpha One drives (s/n 6225577 -0D469828).

Kit includes:

• 31640M Mercury/Mercruiser Standard Trim Tab Magnesium Anode
• 821631M Mercruiser Alpha One Block Magnesium Anode
• 55989M Mercury/Mercruiser Nut Magnesium Anode (Qty 2)
• Alpha One Anode Mounting Hardware Kit

Magnesium is the most active metal on the Galvanic scale and
intended FOR USE IN FRESH WATER ONLY.