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Old 18 August 2014, 08:11   #1
Country: UK - England
Town: Dorset
Boat name: Seabadger
Make: Ribcraft
Length: 5m +
Engine: DF140
Join Date: May 2010
Posts: 568
Outboard Anodes

Does anyone know what material outboard anodes are made of?

I'm thinking neither zinc nor even aluminium anodes will protect an aluminium outboard. So what are the anodes such as the power trim anode made of?

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Old 18 August 2014, 09:31   #2
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Country: UK - England
Town: Sidmouth
Boat name: Various
Make: Avon, Ribcraft
Length: 4m +
Engine: Mercury 40, Honda 50
Join Date: Nov 2012
Posts: 264
All of the ones I'm finding are zinc and aluminium.

Some aluminium alloys contain significant amounts of magnesium. I wonder if they use those for anodes...

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Old 18 August 2014, 09:43   #3
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
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Zinc for salt water and magnesium for fresh.

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