Originally Posted by JackD
See attached photo. These zincs were replaced about 5 weeks ago. My mechanic sent the pic. I'm not sure where the really bad one was. Should I install a galvanic isolator?
Why is the mechanic pulling them after just 5 weeks?
Are you chasing an ongoing problem?
What do the external zinc (s) look like on your boat?
How long do they (external zincs) last?
Do they erode at about the same rate?
Do you have any dc wires in bilge water?
Any neighboring boats with zinc issues?
Are you continually connected to shore power?
The good news is the zincs in the picture are doing their job. Maybe just working a little harder then they should.