I always change my zincs if they're 50% or less

[baz]

I had my diver check my underwater zincs, raw water intake and bottom paint earlier this month as a wedding day anniversery present... :lol: I always have the zincs replaced if they're more than 50% gone just to ensure they're not below 0% for the next inspection... 😉

Our boat is kept in salt water all year round and when docked it's connected to shore power.

Here are some pics...

 

[Boont Boater]

How often have you had them replaced?

Jeff

 

[baz]

I meant to include the replacement schedule but ran out of time... will post a little later.... 🙂

 

[SGIDAVE]

Great pics! Are those included in the "bottom" service?

/david

 

[baz]

My diver includes these as part of the periodic service. They started doing it about a year ago and think it's a real added value and provides some 'accountability' on their part... it's very welcomed IMO.

 

[baz]

Here's my replacement information based on my records from 2011.

As you can see the Prop shaft anode is the anode that gets eaten away the fastest.... it has a lot of metal to protect. 😉

 

[circusmar]

i cant get over how clear your water is, ours is like pea soup in the southern chesapeake... even at our coldest in the 40s (water temp) visibility is only a few feet... i do my own in water service.

 

[Paul Elliott]

Here's my replacement information based on my records from 2011.

As you can see the Prop shaft anode is the anode that gets eaten away the fastest.... it has a lot of metal to protect. 😉

Wow, those zincs are being eaten quickly! Have you perhaps got a grounding issue? My sailboat zincs last at least six months, and probably closer to one year before they get to 50%. I seldom have the boat plugged into shore power, and when I do there's an isolator that probably does some good.

I just got my R27 this June, but the zincs are still looking reasonably good. We have no shore-power connection.

And some marinas are "hotter" than others, but that still seems like an excessive rate of zinc usage.

 

[baz]

Yes... they get eaten but it's not as bad as you make it out to be. The prop shaft is the one that gets eaten the fastest. If I were to let it go to 0% I would likely get 6 to 8 months out of it. The other zincs do reasonably well. After I installed the GI and prop shaft brush things did get better. I do have the boat connected to shore power when its' dock in the marina in Edmonds. It could be that the shore power is the resin the zincs get eaten up more than what you experience.

I suspect the shore power causes an issue but there's little I can do about it beyond what I've done so far.

The important thing is to ensure the zincs never get down to 0% otherwise an expensive repair will result.

I have no idea how this all compared to others. Using a greater statistical spread of data from others would be useful to see where my situation rests at.

Of course, record keeping is the answer to making accurate comparisons.

I hope your zincs continue to not get eaten as quickly as mine do. 🙂