Classic AquaSport

Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: gcapehart on June 05, 2007, 10:02:48 AM

Title: Sacrificial anodes
Post by: gcapehart on June 05, 2007, 10:02:48 AM

While at home we launch in a fresh water river(Penobscot) and run between 8-12 miles before we reach salt water. Then too when we go to the Cape or Mt. Desert we launch directly into salt water. Do I really need to change my anodes to a fresh water type and then back to salt water type? I just put new lead anodes on.  Gary

Title:
Post by: John Jones on June 05, 2007, 12:33:21 PM

Are you sure they are lead?  Usually it's zinc for salt and magnesium for fresh.  I did read about a new alloy but I don't remember what it is.  Magnesium will work in salt, they just don't last very long.  Zinc does a poor job in freshwater.

Title: Yes they are zinc.
Post by: gcapehart on June 06, 2007, 09:16:03 AM

So are you saying that if I do both the magnesium would be better? If it erodes/corodes faster, that is magnesium in salt water does that then offer more protection for the motor? Thanks, Gary

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Post by: John Jones on June 06, 2007, 11:44:40 AM

I don't know if magnesium offers more protection in salt but it does protect while it lasts.