What material of anode to use ......

[sailsmanship]

Have an Alpha One Gen II , using in freshwater only. Do I have this right ? Aluminum in Freshwater, Magnesium in Freshwater with S.S prop, and Zinc in Salt/Brackish water ?....

 

[Don S]

Re: What material of anode to use ......

Nope, you don't have it right.

Zinc= Never
Aluminum = Salt or Brackish water.......
Magnesium = Fresh water---- Aluminum will also work.

According to Merc service bulletins, many aftermarket aluminum anodes are not pure enough in the alloy to work properly...... But what do they know? ? ? ? ?

 

[sailsmanship]

Re: What material of anode to use ......

Are these people wrong then ? I bought from them before, can't remember what material, but I had some galvanic corrosion on the drive so I won't now if you say they are wrong.......
http://www.boatzincs.com/mercruiser.html

 

[tommays]

Re: What material of anode to use ......

It is a claim BUT how do you know if its really a pure material ?

Tommays