Zinc or ali anodes

[Ballistix]

for my boat which is sea based, solent?

Cheers

 

[kenp]

Aluminium. Third the price of zinc.

 

[sailorman]

Seawater = Zinc
Freshwater = Ali

 

[tobble]

but the alu will decay faster I think. I'm no expert but was under the impression that it's basically magnesium for fresh water, zinc for salt and Alu as a compromise. for the sake of £20 you might end up best case having to replace it sooner, or worst case making a mess of your prop etc.

M G Duff are quite helpful if you give them a buzz.

 

[BrendanS]

Not necessarily. Mercruiser now provide all their outdrives with Ali anodes for seawater use, after they had problems with corrosion with Zinc anodes.

 

[tinkicker0]

Saltwater = Zinc
Brackish = Aluminium.
Fresh = Magnesium.

 

[VicS]

Oh dear lets get it right.

Salt water: zinc OR aluminium

Brackish water: aluminium

Freshwater: magnesium.

For salt water use aluminium is expected to last about 1¼ times as long as zinc. aluminium anodes are also less expensive than zinc ones

Loads of useful info on the MG Duff website

 

[sailorman]

Just gotmecoat /forums/images/graemlins/blush.gif

 

[Ballistix]

/forums/images/graemlins/smile.gif Cheers..Ali it is! !
T

 

[Alrob]

I was advised by mercruiser service dealer that if I did not use mercruiser parts then I could have a problem with any warranty claims, so be careful when using the likes of McDuff

 

[Ballistix]

Out of warranty by like 5 years /forums/images/graemlins/smile.gif