[Public-List] Zincs for Lakes

Mike Lehman via Public-List public-list at lists.alberg30.org
Mon May 22 07:20:06 PDT 2017


I think you need salinity for conductivity.

On May 22, 2017 10:08 AM, "Gordon Laco via Public-List" <
public-list at lists.alberg30.org> wrote:

> Hello Bill,
>
> We’ve never had a sacrificial zinc installed… 40 years with two boats on
> the Great Lakes.  I don’t reckon we’ve needed the protection.
>
> Gord #426 Surprise
>
> On 2017-05-22, 9:01 AM, "Public-List on behalf of Bill McCoy via
> Public-List" <public-list-bounces at lists.alberg30.org on behalf of
> public-list at lists.alberg30.org> wrote:
>
>     So, along these lines, do I really need a zinc on my prop shaft for
> fresh water??  I have a magnesium on my rudder but nothing on my new shaft.
>
>
>      Skeep
>
>
>     ________________________________
>     From: Public-List <public-list-bounces at lists.alberg30.org> on behalf
> of via Public-List <public-list at lists.alberg30.org>
>     Sent: Tuesday, May 16, 2017 3:05 PM
>     To: public-list at lists.alberg30.org
>     Subject: Public-List Digest, Vol 3469, Issue 2
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>     Today's Topics:
>
>        1. Re: shaft zinc (via Public-List)
>        2. Re: shaft zinc (George Dinwiddie via Public-List)
>        3. shaft zinc (Stephen gwyn via Public-List)
>
>
>     ----------------------------------------------------------------------
>
>     Message: 1
>     Date: Tue, 16 May 2017 14:11:46 +0000
>     From: via Public-List <public-list at lists.alberg30.org>
>     To: <jkingsland209 at comcast.net>, <public-list at lists.alberg30.org>
>     Subject: Re: [Public-List] shaft zinc
>     Message-ID:
>             <D53C92A57024A44BB953C533987750282B071CC5 at MSGEXSIL1137.ent.
> wfb.bank.corp>
>
>     Content-Type: text/plain; charset="utf-8"
>
>     I also learned a lesson many years ago after occasionally finding
> relatively new zincs gone including the screw and lock washer only a few
> months after installation.   Once when the yard manager sold me a new zinc
> he advised me "seat" it with a light hammer hit before attaching  the screw
> and lock washer.  As he pointed out most of these zincs have little casting
> imperfections (flashing?) on the inside where they seat with the bronze
> male nut.  As these thin ridges of zinc quickly wear away the zinc becomes
> loose on the prop nut and the lock washer becomes useless.
>
>     I have not lost one since following his advice.
>
>     Richard Hazlegrove
>     Quest 433
>     Mobjack Bay, VA.
>
>     -----Original Message-----
>     From: J. Kingsland via Public-List [mailto:public-list at lists.
> alberg30.org]
>     Sent: Tuesday, May 16, 2017 9:15 AM
>     To: Jay Davenport
>     Cc: Alberg 30 Public List -- open to all
>     Subject: Re: [Public-List] shaft zinc
>
>     Thanks!? Mike Lehman mentioned the end of shaft? solution to me after
> he saw that my zinc had disappeared yet again when I had my boat hauled to
> work on the mast wiring a few weeks ago.? I've never heard of it, and then
> saw this thread.? I may have to give it a go!
>
>     Gigi
>
>
>     On May 16, 2017, 9:08 AM, at 9:08 AM, Jay Davenport <jaysail at yahoo.com>
> wrote:
>     >I have used the Canadian Metals end-of-shaft acorn zinc for decades.
> It
>     >works very well. To avoid losing it, it is important to use the lock
>     >washer which is packaged with each new zinc (model B). I only replace
>     >the zinc after two years, when I am hauling the boat for bottom paint.
>     >In addition to the lock washer, I put Locktite Blue on the screw
> ("belt
>     >and suspenders").
>     >Jay DavenportRevolution, A30 #526
>     >
>     >    From: J. Kingsland via Public-List <public-list at lists.alberg30.
> org>
>     >To: Mike Meinhold <meinhold272 at gmail.com>; Mike Meinhold via
>     >Public-List <public-list at lists.alberg30.org>
>     > Sent: Tuesday, May 16, 2017 8:25 AM
>     > Subject: Re: [Public-List] shaft zinc
>     >
>     >I was thinking about trying the Zinc setup at the end of the shaft on
>     >my boat as well. The area where I usually put the zinc, forward of the
>     >prop, is too narrow and the custom trimmed pieces of zinc I've
> attached
>     >in the past won't stay on.
>     >
>     >Other than apparently it is not working for you Gordon, has anyone
> else
>     >had success with it?
>     >
>     >
>     >Gigi Kingsland
>     >PERFECT intentions #146
>     >
>     >
>     >On May 16, 2017, 5:58 AM, at 5:58 AM, Mike Meinhold via Public-List
>     ><public-list at lists.alberg30.org> wrote:
>     >>I would think replacing the shaft nut is your only solution.? Yes,
>     >>connecting a ground wire to a zinc would help temporarily.? Drilling
>     >>and tapping underwater sounds tough- not that replacing the shaft nut
>     >>is easy!
>     >>
>     >>Mike
>     >>
>     >>Michael J. Meinhold
>     >>meinhold272 at gmail.com / 301 852 0619
>     >>
>     >>> On May 15, 2017, at 10:19 PM, George Dinwiddie via Public-List
>     >><public-list at lists.alberg30.org> wrote:
>     >>>
>     >>> Gordon,
>     >>>
>     >>> From your description, I'm guessing you have an ElectroGuard or
>     >>Canada Metal zinc
>     >>(http://alberg30.org/maintenance/MechanicalPropulsion/Zincs/)?
>     >Wouldn't
>     >>it be possible to replace the zinc-nut (which the screw threads into)
>     >>while in the water?
>     >>>
>     >>> - George
>     >>>
>     >>>> On 5/15/17 9:37 PM, gordon white via Public-List wrote:
>     >>>>? Went to replace the zinc on the end of the shaft today and lo and
>     >>>>behold the old zinc and the socket head screw supposed to hold it
>     >>were
>     >>>> gone. It's been difficult to attach the thing, especially under
>     >>water,
>     >>>> for several years. Now it appears the threads (1/4 - 20?) are
>     >>completely
>     >>>> stripped. I know of no way to fix that without hauling out, which
>     >is
>     >>not
>     >>>> on the schedule until fall.
>     >>>>
>     >>>>
>     >>>>? ? There was no apparent corrosion on the prop
>     >>>>
>     >>>>
>     >>>>? ? My current solution is to drop a zinc on a piece of wire
>     >>overboard
>     >>>> and attach the other end to the engine somewhere. Probably will
> use
>     >>this
>     >>>> system only at my dock, as it probably would be a nuisance under
>     >>way. I
>     >>>> know of nowhere to attach it more permanently.
>     >>>>
>     >>>>
>     >>>>? ? My first idea would be to drill out the hole and tap it to a
>     >>larger
>     >>>> thread, but do not want to go to 5/16 if I can help it. Next idea
>     >is
>     >>to
>     >>>> hammer in a piece of brass rod (bronze??) or a bronze bolt and
>     >drill
>     >>and
>     >>>> tap that back to 1/4 - 20.
>     >>>>
>     >>>>
>     >>>>? ? Anyone had this problem & how did you solve it?
>     >>>>
>     >>>>
>     >>>> - Gordon White
>     >>>>
>     >>>> Brigadoon II # 275
>     >>>>
>     >>>
>     >>> --
>     >>>
>     >>----------------------------------------------------------
> ------------
>     >>>? When I remember bygone days? ? ? ? ? ? ? ? ? ? ? ? George
> Dinwiddie
>     >>>? I think how evening follows morn;
>     >gdinwiddie at alberg30.org
>     >>>? So many I loved were not yet dead,? ? ? ? ?
> http://www.Alberg30.org
>     >>>? So many I love were not yet born.? ? ? ? ? ? ? ? ? ? ? ? ? also
>     >see:
>     >>>? ? ? ? ? ? ? 'The Middle' by Ogden Nash? ?
> http://idiacomputing.com
>     >>>
>     >>----------------------------------------------------------
> ------------
>     >>>
>     >>>
>     >>>
>     >>> _______________________________________________
>     >>> These businesses support your Association:
>     >>> http://www.alberg30.org/store/A30supporters.html
>     >>> Please support them.
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>     >>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>     >>_______________________________________________
>     >>These businesses support your Association:
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>     >These businesses support your Association:
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>     >
>     >
>     >
>
>
>     ------------------------------
>
>     Message: 2
>     Date: Tue, 16 May 2017 10:49:24 -0400
>     From: George Dinwiddie via Public-List
>             <public-list at lists.alberg30.org>
>     To: public-list at lists.alberg30.org
>     Subject: Re: [Public-List] shaft zinc
>     Message-ID: <e9cda1dc-551a-65c7-3d0d-13012fa06897 at alberg30.org>
>     Content-Type: text/plain; charset=utf-8; format=flowed
>
>     Excellent advice, Richard. May I quote your email on the website zincs
> page?
>
>       - George
>
>     On 5/16/17 10:11 AM, via Public-List wrote:
>     > I also learned a lesson many years ago after occasionally finding
> relatively new zincs gone including the screw and lock washer only a few
> months after installation.   Once when the yard manager sold me a new zinc
> he advised me "seat" it with a light hammer hit before attaching  the screw
> and lock washer.  As he pointed out most of these zincs have little casting
> imperfections (flashing?) on the inside where they seat with the bronze
> male nut.  As these thin ridges of zinc quickly wear away the zinc becomes
> loose on the prop nut and the lock washer becomes useless.
>     >
>     > I have not lost one since following his advice.
>     >
>     > Richard Hazlegrove
>     > Quest 433
>     > Mobjack Bay, VA.
>     >
>     > -----Original Message-----
>     > From: J. Kingsland via Public-List [mailto:public-list at lists.
> alberg30.org]
>     > Sent: Tuesday, May 16, 2017 9:15 AM
>     > To: Jay Davenport
>     > Cc: Alberg 30 Public List -- open to all
>     > Subject: Re: [Public-List] shaft zinc
>     >
>     > Thanks!  Mike Lehman mentioned the end of shaft  solution to me
> after he saw that my zinc had disappeared yet again when I had my boat
> hauled to work on the mast wiring a few weeks ago.  I've never heard of it,
> and then saw this thread.  I may have to give it a go!
>     >
>     > Gigi
>     >
>     >
>     > On May 16, 2017, 9:08 AM, at 9:08 AM, Jay Davenport <
> jaysail at yahoo.com> wrote:
>     >> I have used the Canadian Metals end-of-shaft acorn zinc for
> decades. It
>     >> works very well. To avoid losing it, it is important to use the lock
>     >> washer which is packaged with each new zinc (model B). I only
> replace
>     >> the zinc after two years, when I am hauling the boat for bottom
> paint.
>     >> In addition to the lock washer, I put Locktite Blue on the screw
> ("belt
>     >> and suspenders").
>     >> Jay DavenportRevolution, A30 #526
>     >>
>     >>    From: J. Kingsland via Public-List <public-list at lists.alberg30.
> org>
>     >> To: Mike Meinhold <meinhold272 at gmail.com>; Mike Meinhold via
>     >> Public-List <public-list at lists.alberg30.org>
>     >> Sent: Tuesday, May 16, 2017 8:25 AM
>     >> Subject: Re: [Public-List] shaft zinc
>     >>
>     >> I was thinking about trying the Zinc setup at the end of the shaft
> on
>     >> my boat as well. The area where I usually put the zinc, forward of
> the
>     >> prop, is too narrow and the custom trimmed pieces of zinc I've
> attached
>     >> in the past won't stay on.
>     >>
>     >> Other than apparently it is not working for you Gordon, has anyone
> else
>     >> had success with it?
>     >>
>     >>
>     >> Gigi Kingsland
>     >> PERFECT intentions #146
>     >>
>     >>
>     >> On May 16, 2017, 5:58 AM, at 5:58 AM, Mike Meinhold via Public-List
>     >> <public-list at lists.alberg30.org> wrote:
>     >>> I would think replacing the shaft nut is your only solution.  Yes,
>     >>> connecting a ground wire to a zinc would help temporarily.
> Drilling
>     >>> and tapping underwater sounds tough- not that replacing the shaft
> nut
>     >>> is easy!
>     >>>
>     >>> Mike
>     >>>
>     >>> Michael J. Meinhold
>     >>> meinhold272 at gmail.com / 301 852 0619
>     >>>
>     >>>> On May 15, 2017, at 10:19 PM, George Dinwiddie via Public-List
>     >>> <public-list at lists.alberg30.org> wrote:
>     >>>>
>     >>>> Gordon,
>     >>>>
>     >>>> From your description, I'm guessing you have an ElectroGuard or
>     >>> Canada Metal zinc
>     >>> (http://alberg30.org/maintenance/MechanicalPropulsion/Zincs/)?
>     >> Wouldn't
>     >>> it be possible to replace the zinc-nut (which the screw threads
> into)
>     >>> while in the water?
>     >>>>
>     >>>> - George
>     >>>>
>     >>>>> On 5/15/17 9:37 PM, gordon white via Public-List wrote:
>     >>>>>   Went to replace the zinc on the end of the shaft today and lo
> and
>     >>>>> behold the old zinc and the socket head screw supposed to hold it
>     >>> were
>     >>>>> gone. It's been difficult to attach the thing, especially under
>     >>> water,
>     >>>>> for several years. Now it appears the threads (1/4 - 20?) are
>     >>> completely
>     >>>>> stripped. I know of no way to fix that without hauling out, which
>     >> is
>     >>> not
>     >>>>> on the schedule until fall.
>     >>>>>
>     >>>>>
>     >>>>>     There was no apparent corrosion on the prop
>     >>>>>
>     >>>>>
>     >>>>>     My current solution is to drop a zinc on a piece of wire
>     >>> overboard
>     >>>>> and attach the other end to the engine somewhere. Probably will
> use
>     >>> this
>     >>>>> system only at my dock, as it probably would be a nuisance under
>     >>> way. I
>     >>>>> know of nowhere to attach it more permanently.
>     >>>>>
>     >>>>>
>     >>>>>     My first idea would be to drill out the hole and tap it to a
>     >>> larger
>     >>>>> thread, but do not want to go to 5/16 if I can help it. Next idea
>     >> is
>     >>> to
>     >>>>> hammer in a piece of brass rod (bronze??) or a bronze bolt and
>     >> drill
>     >>> and
>     >>>>> tap that back to 1/4 - 20.
>     >>>>>
>     >>>>>
>     >>>>>     Anyone had this problem & how did you solve it?
>     >>>>>
>     >>>>>
>     >>>>> - Gordon White
>     >>>>>
>     >>>>> Brigadoon II # 275
>     >>>>>
>     >>>>
>     >>>> --
>     >>>>
>     >>> ------------------------------------------------------------
> ----------
>     >>>>   When I remember bygone days                        George
> Dinwiddie
>     >>>>   I think how evening follows morn;
>     >> gdinwiddie at alberg30.org
>     >>>>   So many I loved were not yet dead,
> http://www.Alberg30.org
>     >>>>   So many I love were not yet born.                          also
>     >> see:
>     >>>>               'The Middle' by Ogden Nash
> http://idiacomputing.com
>     >>>>
>     >>> ------------------------------------------------------------
> ----------
>     >>>>
>     >>>>
>     >>>>
>     >>>> _______________________________________________
>     >>>> These businesses support your Association:
>     >>>> http://www.alberg30.org/store/A30supporters.html
>     >>>> Please support them.
>     >>>> _______________________________________________
>     >>>> Public-List mailing list
>     >>>> Public-List at lists.alberg30.org
>     >>>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>     >>> _______________________________________________
>     >>> These businesses support your Association:
>     >>> http://www.alberg30.org/store/A30supporters.html
>     >>> Please support them.
>     >>> _______________________________________________
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>     >>> Public-List at lists.alberg30.org
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>     >> _______________________________________________
>     >> These businesses support your Association:
>     >> http://www.alberg30.org/store/A30supporters.html
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>     >>
>     >>
>     >>
>     >
>     > _______________________________________________
>     > These businesses support your Association:
>     > http://www.alberg30.org/store/A30supporters.html
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>     >
>
>     --
>       ------------------------------------------------------------
> ----------
>        When I remember bygone days                         George Dinwiddie
>        I think how evening follows morn;
> gdinwiddie at alberg30.org
>        So many I loved were not yet dead,
> http://www.Alberg30.org
>        So many I love were not yet born.                          also see:
>                     'The Middle' by Ogden Nash
> http://idiacomputing.com
>       ------------------------------------------------------------
> ----------
>
>
>
>
>
>     ------------------------------
>
>     Message: 3
>     Date: Tue, 16 May 2017 10:01:01 -0700
>     From: Stephen gwyn via Public-List <public-list at lists.alberg30.org>
>     To: public-list at lists.alberg30.org
>     Subject: [Public-List] shaft zinc
>     Message-ID: <591B304D.3080004 at nrc-cnrc.gc.ca>
>     Content-Type: text/plain; charset="ISO-8859-1"; format=flowed
>
>
>     I had this problem last haulout. The threads on the bronze prop
>     zinc holder of the CMPN-B prop zinc had worn out after only 15
>     years. Replacing it turned out to be fairly easy with the right
>     tools: a length of 2x4 to wedged between the prop and the hull to
>     keep the prop from turning and a BIG wrench to turn the prop nut
>     holder. Luckily, I'm on good terms with the people in the yard
>     and they volunteered to lend me the 30-inch wrench. Out of the
>     water with someone else holding the 2x4, it took all of 5
>     minutes. In the water would be trickier.
>
>     I use locktite blue to keep the screw in.
>
>     SG
>
>
>
>     --
>     ------------------------------------------------------------
> -------------
>     Stephen Gwyn                        | Tel: 1-250-363-3136
>     Canadian Astronomy Data Centre      | Fax: 1-250-363-0045
>     Herzberg Astronomy and Astrophysics | Cell: 1-250-885-6969
>     5071 West Saanich Road              | E-mail:
> Stephen.Gwyn at nrc-cnrc.gc.ca
>     Victoria, BC, V9E 2E7, Canada       | http://astrowww.phys.uvic.ca/~
> gwyn/
>     ------------------------------------------------------------
> -------------
>
>
>     ------------------------------
>
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