-
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.
-
SC Club Moderator
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
-
Very interesting! As always, thanks for the insight!!