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I just read that zinc anodes are for saltwater use only. First time I've heard that. Is that true? Is it a case of shorter life expectancy or complete ineffectiveness or is it complete BS?



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How can you tell which you have on the shaft of your Merc outboard (Saltwater Optimax never used in the saltwater environment)?

Edited by Sk8man
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10 hours ago, Fat Trout said:

If you didn't add it.  It came from the factory with Zinc.

Yes I suspected that but I am wondering if there is a way to tell by looking at it because I think mine was replaced a few years ago.when I had some servicing done.

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