Prop shaft zinc mystery-HELP PLEASE

[Sunsetrider]

Originally Posted by fguptill

Sunsetrider,
Aluminum anodes may be a good idea in fresh water, but not in salt water.

Actually the reverse is true - aluminum is recommended over zinc in salt water, not recommended for fresh water. Every resource you find will confirm that.

[a64pilot]

Originally Posted by Sunsetrider

Actually the reverse is true - aluminum is recommended over zinc in salt water, not recommended for fresh water. Every resource you find will confirm that.

I’ve heard that and can’t understand why zinc is almost universal.
Just ignorance?
My factory Suzuki’s “zinc” is either aluminum, or the lightest zinc I have ever felt.
Magnesium for fresh I believe.

[Sunsetrider]

Originally Posted by a64pilot

I’ve heard that and can’t understand why zinc is almost universal.

Magnesium for fresh I believe.

Tradition I suspect - and the double use of the word "zinc" probably leads some astray. Yes re magnesium.