Zincs

[oscarvan]

Just throw a volt meter lead in the water

More specific? Where does the other one go?

[MadHatter53]

I use two on each shaft, one 5” on each rudder and I have a transom divers plate as well. I land store my boat during winter and usually the rudder zincs are 50% worn, the transom maybe 30% but my four shaft zincs are barely touched and everything gets replaced in the spring.

[Captain Ralph]

More specific? Where does the other one go?

On your internal bonding system; thru hull fitting, shaft or interconnecting straps.

Then in a separate test, the green ACv fault current wire.

[JuiceClark]

I wrote a funny little 30 page thing about building a barnacle barrier. If you have half an hour, I think you'll find it pretty funny. I actually had an old Trojan F36 that made it 7 years without a bottom job and no barnacles...used to enjoy messing around with ideas.

BUT, the PDF is 3 megs and the site will only let me upload half a meg. If there's another way to post a bigger file, please let me know. It won't let me upload a ZIP file, either.

[rwaldrop13]

I always believed over zink was O K.
Better to give up monkey metal than your expensive bronze.
If they burn up quickly, zinc up well and find your (others) voltage leaks.

Having lived in some better marinas and working marinas, I'll tell you, there are some boats to stay away from and no amount of zink will protect you.
Just throw a volt meter lead in the water and accidentally trip a suspect boats shore breaker, (when nobody is on the suspect boat is preferred).

I remember there is a formula for figuring zinks per metal protected.
I can not find it.

Thanks Ralph. One of these days if you're in Fort Myers, I'll buy the first beer!

[Captain Ralph]

Thanks Ralph. One of these days if you're in Fort Myers, I'll buy the first beer!

Outstanding Plan.