Bad shore power wiring and poorly bonded grounds can cause excessive corrosion. Bad electrical systems on neighboring boats could also exacerbate your problems. I think most people follow the practice of unplugging from shore unless absolutely necessary. A top off for the batteries is enough every 2-4 weeks. If the zinc wasn't corroded then you don't need a second one. But having the prop corrode worse than the zinc leads me to agree that you may not have had good contact. I make sure to get the ones that have little copper balls on the inner surface to press in tight to the shaft. You might also look for a prop zinc if available.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomon, MD On Nov 26, 2013 12:19 PM, <joanne.dowd3...@gmail.com> wrote: > Joel > > the anode had some corrosion but by no means badly. I am going to put on 2 > this year. I did question that somehow I got a salt water anode instead of > fresh. We have had some problems with the electrical inverter as well this > year- seems to have stopped working- I did wonder if the unused AC power > from the shore power could have been the cause- but I am not an electrician > so may be WAY off > > Joanne > > Sent from Windows Mail > > *From:* Joel Aronson <joel.aron...@gmail.com> > *Sent:* Tuesday, November 26, 2013 11:07 AM > *To:* cnc-list@cnc-list.com > > Joanne, > > Was there any anode (zinc) left? On the Chesapeake I go through several > in a season. You might consider putting on 2 or having someone dive and > check during the season. > > Joel > 5/3 > Annapolis > > > On Tue, Nov 26, 2013 at 11:05 AM, Rich Knowles <r...@sailpower.ca> wrote: > >> Welcome Joanne! >> >> What is the engine in your boat and shaft diameter? >> >> Rich >> >> >> >> >> >> >> >> On Nov 26, 2013, at 11:53 AM, joanne.dowd3...@gmail.com wrote: >> >> Hello all >> >> I have been watching the list for a while but never contributed until >> now. Couple years ago we bought a 1980 C&C 30 MKI from the original owner. >> wonderful wonderful boat! This was our first boat and things have been a >> bit daunting at times- but I cant tell you how much the list helps. >> >> When we pulled her this year we had some serious prop corrosion issues. >> We are still trying to assess the cause (anode was replaced last spring >> but perhaps I didn't get good contact)but regardless we will need to >> replace the prop. It is a 15 inch radius 2 blade fixed but the erosion is >> such that I cannot read the pitch- how do I figure this out? >> >> Any suggestions as to suppliers as well?- we will likely stick with the 2 >> blade fixed. has any one had experience with the urethane perfect pitch >> props? >> >> Thanks in advance >> >> Joanne Dowd >> SV Islay >> Hamilton ON >> >> Sent from Windows Mail >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com >> >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com >> >> > > > -- > Joel > 301 541 8551 > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > >
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