Magnesium AnodeFor Mercruiser Alpha I Gen I Skeg Anode And Mercury 35Hp and Up For Freshwater Use

Mercruiser Alpha I Gen I Trim Tab Skeg Magnesium Anode For Fresh Water 31640 Mercury/Mercruiser Standard Trim Tab Magnesium Anode Base Diameter: 3-1/2" Height: 2-1/2" Threaded Mounting Hole: 7/16"-14 Weight: 1.1 lbs

Fits most Mercury/Mariner outboards 35 hp and above.

Fits Mercruiser Alpha One outdrives.

This Is A US Military Grade Magnesium Anode Made To The Highest Quality. Magnesium Is For Freshwater Use.

Replaces: Mercury 31640M, Martyr CM31640M, Sierra 18-6011M, 41107-ZW1-003M, Tecnoseal 00800MG