Third time lucky? New boat, Princess 460

Sticky Fingers

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They always look pink straight after washing with acid
Yup could be that. Scraping back they looked fine. To be fair there were a few very small areas of galvanic pitting in one rudder caused by an anode bonding fault about 5 years ago. Now fixed obviously and the bonding tests were ok. So it’s not perfect but I’ve no reason to believe that there’s a dezincification issue here.
 

oldgit

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My boat on the drying blocks last week due to fouling problems.
Prop and Shaft anodes virtually gone and only fitted in April.
All other anodes displaying minor wasting and OK.
 

Elessar

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My boat on the drying blocks last week due to fouling problems.
Prop and Shaft anodes virtually gone and only fitted in April.
All other anodes displaying minor wasting and OK.
Means you’ve lost continuity between shafts and engine/main anodes.
Do you have those spring things to earth the shaft? They always seem to fail. I hard wire mine from bolt to bolt across the shaft coupler. Measure the resistance between your props and the hull bar anode. Should be nearly zero if it isn’t, fix it before you launch.
 

oldgit

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Means you’ve lost continuity between shafts and engine/main anodes.
Do you have those spring things to earth the shaft? They always seem to fail. I hard wire mine from bolt to bolt across the shaft coupler. Measure the resistance between your props and the hull bar anode. Should be nearly zero if it isn’t, fix it before you launch.
will investigate. :unsure:
 
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