Sounds like you have a "hot" marina
It seems strange to me that you have to replace 2 zincs after only 8 months in freshwater (that's an assumption, since you live in Salem). Sounds like a neighbor of yours is shooting off stray electolysis and that's eating up your zincs. A galvanic isolator? I'm guessing that's one of those zinc fish you hang off the back of the boat. The only way those things work is if they're grounded to a bonding plate. The other alternative is to bond every metal thing on the boat, including standing rigging & stanchions. Then you can just hook up the fish to a stanchion. But don't attach it to a stanchion unless they're bonded, otherwise your prop will be cheese in a year! One more alternative is to find another slip. Where's your boat moored? Here's an example: my guy's C30 was in Tomahawk Bay in Portland. He hauled it for a bottom job and then over a year later he hauled it for a survey to sell it. The zincs were like new! If you're in Tomahawk Bay, you might consider moving slips & see if that helps (assuming a neighbor has stray electrolysis). Good luck! LaDonna
