Anodes - a warning!

[jimh]

Had my boat lifted out for a scrub yesterday, she's only been in the water 3 months but I was concerned at all the fouling around the tabs so thought the rest of the hull must be as bad - turned out it wasn't!!
The point of the post however, I was absolutely gobsmacked by the state of the anodes, particularly the 'ring' one at the rear of the duo props - almost completely gone. Then the crane operator telling me about a princess 42 last week that needed all new props and very nearly complete new legs for the same reason. Don't know if this is a localised problem, but certainly for the 'newbies' like me out there, be warned and keep an eye out.

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[DepSol]

Stainless or Aluminium props?


<hr width=100% size=1>Dom

Now where is that Brendan hiding?

 

[ccscott49]

Alloy outdrives eat anodes, be careful. Often it's the metal parts of a boat, which get fouled the worst, certainly is down here inn the meddy, the bottom of my boat was fuine,. afew barnacles here and there, but my rudder and props were covered in all kinds of masties, the antifoul underneath them was fine, very curious!

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[jimh]

my props are stainless, however the princess I referred to had ally's..

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[DepSol]

With SS props you have to double up on your bar transom shield anodes to sop this happening.

<hr width=100% size=1>Dom

Now where is that Brendan hiding?

 

[DavidJ]

Following Doms thread maybe a good idea for you to double up on the bar anyway SS or not. You can get longer bolts especially to do this.
Also, do you leave your shore support on. Apparently earth leakage can cause increased sacrivisial (spelling!) activity.
David

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[jimh]

I was talking to a guy on my pontoon who mentioned the same re shore hook up. I don't leave it permanently on, but it has had 2 spells of being left on for a week - won't be doing that any more!

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[tripleace]

Triple Ace was fitted with teh Merc electric anodes .. after fitting 4 times the life...

strongly recomend.


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[hlb]

I have a spare anode on the end of a wire. If I'm leaving the boat for a while I conect it up to my two prop shafts with a jubilee clip and throw it over the side. This saves a bit of wear to the normal ones.

<hr width=100% size=1> <font color=blue>No one can force me to come here.<font color=red> I'm a volunteer!!.<font color=blue>

Haydn

 

[gonfishing]

hi
you may need to fit a galvanic isolator have a look at www.adverc.co.uk[url/] you may find... <hr width=100% size=1>WHAT??? more petrol!!!

 

[oldsaltoz]

Many marinas run their own impressed cathodic protection systems, this puts an electrical current thru the water to anodes to protect steel piles etc, if they use anodes that are higher in nobility, your anodes can be effected under some conditions.

This can decrease the life of your anodes, particularly if you have no galvanic isolator and shore power connected or a conductive connection to the pontoon.

I hope this helps.

<hr width=100% size=1> Old Salt Oz /forums/images/icons/cool.gif Growing old is unavoidable. However, growing up is still optional.

 

[ArthurWood]

Colin- I have similar experience w/metal parts here in Florida - antifoul still in place on metal bits, except on props, but all coated w/nasties. Have to clean monthly.

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