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  1. #1
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    1989 Evinrude E140TLCEB 140hp Anodes

    Do they make magnesium anodes for this motor? It has aluminum / zinc from the factory. I have been reading that magnesium is better in freshwater than either aluminum or zinc.

  2. SC Club Moderator ChampioNman's Avatar
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    #2
    Taken from Boating Magazine author Kevin Falvey.

    Anodes create electrical current by setting up a difference in electrical potential. More is better in the sense that it’s the equivalent of a tastier dish that your guest, corrosion, will devour readily. But suppose you run out of snacks?
    Magnesium has a low current capacity. Like a bowl of nuts, it’s quickly eaten. Zinc and aluminum are akin to a plate piled high with home cooking. The meal lasts longer. So, though magnesium offers more protective electrons faster, it protects for only about one-third the time of zinc, and just one-fifth the time of aluminum. In a hypothetical situation where zinc would last 150 days, magnesium would last but 50 days, while an aluminum anode would have corrosion lined up at the chow line for 225 days

  3. Member
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    #3
    Very interesting! As always, thanks for the insight!!