Annode replacement advice

[bowler]

Hi all.

Just curious on thoughts. I have pulled my boat out today for the first time in 3 years due to C19 etc. It lives in freshwater, maybe 3 sea trips per year for a few days to a week or 2 ar a time.

I expected to have next to no anodes left on the hull but there is a load of them left. See pics. These have been on the boat for 4 years! Should I squeeze another year or 2 out of them? Interestingly enough, the trim tab anodes were nonexistent, but were significantly smaller to begin with I suppose.

Just curious as my previous boats lived on trailers and anodes were rarely changed at all.

D

 

[ST840]

For the relatively cheap price of a replacement or two, I'd be inclined to change them. Why take the risk?

 

[Tranona]

Hi all.

Just curious on thoughts. I have pulled my boat out today for the first time in 3 years due to C19 etc. It lives in freshwater, maybe 3 sea trips per year for a few days to a week or 2 ar a time.

I expected to have next to no anodes left on the hull but there is a load of them left. See pics. These have been on the boat for 4 years! Should I squeeze another year or 2 out of them? Interestingly enough, the trim tab anodes were nonexistent, but were significantly smaller to begin with I suppose.

Just curious as my previous boats lived on trailers and anodes were rarely changed at all.

DView attachment 140399

If they are zinc they are not doing anything in freshwater and have a coating on them. Ypu would be better off with aluminium anodes if you alternate between fresh and seawater. what are they bonded to as I would be concerned about the things they are supposed to be protecting.

 

[bowler]

I have new magnesiums on hand so will stick those on. Boat is in fresh water 45+ weeks of the year.

 

[Portofino]

If they are zinc they are not doing anything in freshwater and have a coating on them. Ypu would be better off with aluminium anodes if you alternate between fresh and seawater. what are they bonded to as I would be concerned about the things they are supposed to be protecting.

That would worry me too ……..why ?
I would want to inspect inside the sea ( or what ever water ? ) cooling system for piece of mind .

We know the tab anodes went ie worked so we know anodes have worked what ever type in what ever water(s) .

 

[bowler]

Just found this pic of the originals fitted by PO. I see a big M on the sides of the hull anodes. Do these look like Magnesium to a trained eye? Happy to change either way.

 

[bowler]

Decided to replace with Ali in the end.

D

 

[Portofino]

Just found this pic of the originals fitted by PO. I see a big M on the sides of the hull anodes. Do these look like Magnesium to a trained eye? Happy to change either way.

M.G.DUFF is the manufactures name .

 

[bowler]

I know this Porto. On the right hand side in black ink is a letter M written in what looks like marker.