Curious, which zinc was eroded? Closest to engine? Dennis C.
On Nov 4, 2017 7:15 AM, "Danny Haughey via CnC-List" <[email protected]> wrote: > I had my boat hauled a coupe of weeks ago. I put two zinc on the shaft > and one was all but gone the other was not to eroded at all. I found that > puzzling. Did I not get good enough contact with the shaft on that one? > Last year at haul out with just one zinc it looked a lot like the more > sacrificed one this year. > > Danny > > > > Sent from my T-Mobile 4G LTE Device > > -------- Original message -------- > From: Rick Brass via CnC-List <[email protected]> > Date: 11/3/17 8:20 PM (GMT-05:00) > To: [email protected] > Cc: Rick Brass <[email protected]> > Subject: Re: Stus-List How long do zincs last? > > Imzadi has 2 Camp zincs on the prop shaft (whacked good, but no TefGel) > and spends most of her time in the slip not connected to shore power. I > end up replacing zincs about every two years; sometimes one of the two is > more eroded than the other, and the better one will last for another year. > I would not presume that your performance after 18 months is all that > unusual, especially if there is little stray current on the docks and you > have an isolator. > > > > I replace the pencil zinc in the heat exchanger when I change the oil and > filter, which works out to be about every year with typical boat usage of > about 100 hours per year. Smaller zinc, and I’m mostly in brackish water. > > > > Rick Brass > > Washington, NC > > > > > > *From:* CnC-List [mailto:[email protected]] *On Behalf Of *Dennis > C. via CnC-List > *Sent:* Thursday, November 2, 2017 11:01 AM > *To:* CnClist <[email protected]> > *Cc:* Dennis C. <[email protected]> > *Subject:* Stus-List How long do zincs last? > > > > Recent thread gave replies of 3-8 months. I dove Touche' yesterday to > change the zincs and found the prop zincs were only about 20% sacrificed. > Best I recall, those zincs have been on the shaft for about 18 months. > > > > On the other hand, I seem to go through engine heat exchanger zincs about > every 6 months. Go figure. > > > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
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