[Public-List] prop zincs

Wed Feb 24 15:34:31 PST 2010

I actually tried doing a badly-needed bottom job on a shoal-draft boat in my 
3-foot tidal range one time, by running it aground on a protected beach on a 
full moon tide.  The highest full moon tide of the year, in fact.  Think 
about that statement for a minute, and you will understand why I don't plan 
to try it again.

Actually, that was just the start of an adventure that involved the boat 
sailing away from me in a (rare for here) fog, and an unsuccessful attempt 
to sell a new Hunter 34 while wearing no pants.

But I digress.

David Swanson
Strayaway Child
Alberg 30 #229

----- Original Message ----- 
From: <crufone at comcast.net>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Wednesday, February 24, 2010 4:46 PM
Subject: Re: [Public-List] prop zincs

> Careening: to cause a (boat) to lean over to one side.
> ----- Original Message ----- 
> From: "Randy Katz" <randy.katz50 at gmail.com>
> To: public-list at lists.alberg30.org
> Sent: Wednesday, February 24, 2010 4:24:06 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [Public-List] prop zincs
>
> Greetings,
> No, I never have my boat plugged in at the dock-- no chargers. I
> understand that others around me may have set ups that contribute to my
> corroding zinc.
>
> I've thought of the electric shock possibility a couple of times. I've
> changed my zincs in the water many times over the years, but yes, your
> comment makes me give that a second thought....
>
> I'll check with the marina and see what they say.
>
> I've thought of using the whatdoyoucallit-- where you tie up in the
> right place, wait for the tide to recede while the boat settles onto beams
> on the bottom, thus exposing the bottom of the boat for between-tides
> repairs. But that's a huge time committment!
>
> I gather that most must be changing their zincs about once/year in salt
> water. Weird, I wonder what's going on.
> Many thanks for your comments--- 
> Randy Katz
> #249 Bellingham/Seattle, WA.
>
>
>
> Date: Tue, 23 Feb 2010 16:36:31 -0800
> From: Randy Katz <randy.katz50 at gmail.com>
> To: public-list at lists.alberg30.org
> Subject: Re: [Public-List] Prop zincs?
> Message-ID:
> <85ff14e21002231636w93dec71v2765adb52a388836 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Greetings,
>
> It's the B size that is the zinc fitting on the end of the drive shaft
> on most/all our boats. Gooping up the screw with some marine caulking may
> help the screw to stay tight for longer. Clunking the zinc with a hammer
> after you put it on helps to seat it; the screw must then be retightened.
>
> There are different qualities of zincs, not surprisingly. Some are more
> "pure" and last longer, others are less expensive and last a shorter time.
> This place in Seattle is the way to go for prop zincs and for the pencil
> zincs that go into most engines:
> http://www.harboranodes.com/propeller_nut_caps.html
> I bought a dozen of each for a reasonable price.
>
> QUESTION: I'm finding that I need to replace my prop zinc 2x/year in
> Squalicum Marina in Bellingham, WA. Does this sound about right to the 
> rest
> of you? I change my own zincs at the dock, but I hate the cold water. (A
> used wet suit from Pacific Marine, Bellingham-- $35-- helps a ton, but
> still, that water's friggin' cold!)
>
> Anyone have thoughts about how to reduce this frequency to 1x/year? I've
> been hanging a large guage wire from the shaft over the side into the 
> water
> with old zincs securely attached, hoping to have them help slow down the
> corrosion. Maybe helps a bit.
>
> Other view points would be appreciated!
>
>
> ------------------------------ 
>
> Message: 5
> Date: Tue, 23 Feb 2010 19:45:48 -0500
> From: "John Birch" <Sunstone at cogeco.ca>
> To: "Alberg 30 Public List -- open to all"
> <public-list at lists.alberg30.org>
> Subject: Re: [Public-List] Prop zincs?
> Message-ID: <6DEF3AF3CA094C2B8916BC02B1A15189 at JohnPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Randy, either you or your neighbour or the marina itself seems to have a
> stray current issue.
>
> Do you plug in all the time in your marina ?
>
> If so, start with your boat - I'm no expert on this stuff, but x2 seems
> awfully zinc hungry. What kind of charger are you using ? Please don't 
> tell
> me it's a crappy hookup automotive one - they should never be used 
> anywhere
> near water, they can charge the water surrounding a boat with a more than
> lethal charge.
>
> And no, the fuses won't stop it. Not necessarily .... That's also why we 
> do
> not allow diving or swimming in our marina.
>
> If a diver is employed, they are commercial and we lockout the entire 
> marina
> electrical system - and our's is properly done electrics too - water,
> electricity .... ugh, bad trade.
>
> Best
>
> John
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