If you understand zincs, you wouldn't be asking the question. Yes, there
has to be a good connection. Clean the surface before attaching.
Gordon
"Gil" wrote in message
news:Ooylc.7757$%o1.1142@lakeread03...
I understand the basic principles of the sacrificial zincs on my outdrive.
Just one question as I replace them for this season: are they supposed to
make a good electrical connection to the surface they are mounted on or
should they be isolated? Or does it matter either way? Thanks, Gil