Eric, One of my zincs also dissolves faster than the other . My electrician found that I only had 560 at the strap. He is trying to determine if I have a leak , but we also surmised that I may have degraded continuity . I assume that there is two stainless straps welded to the rudder post that are tapped for the bolts that hold the zincs. I wonder what the thickness of the plates are , as the only contact is , the threaded area. If mud or debris found its way between the threads I assume that could lower continuity. If we cannot find any leak or other cause for the low number my electrician suggested that we add a larger zinc with two bronze studs ( better conductor than stainless) through the hull and connect to the strap or quadrant. I cannot see how you could do any harm by putting a rod up through the hole, its just an empty void , but I don't think its going to help much to clean out the inside . I also cannot see any harm in enlarging the hole . Rinsing the inside with a hose probably would help to get some old muck out .

I would be interested to know if you get the number up.

Pat SM123

-----Original Message-----
From: kimberlite@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Sun, Sep 4, 2016 5:41 am
Subject: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside

 

I have recently noticed that one zinc on the rudder is active and the other is not.

I believe there are S/S fingers inside the rudder which are attached to the rudder post. which in turn is attached to the bonding. Anyone have an idea as to why I might be having dissimilar erosion of the

zincs.

I also have put a piece of threaded rod into the hole in the bottom of the rudder and a lot of black silt and parts of shells come out of the rudder. Does anyone think I am doing harm to the rudder with this 2 foot long piece of rod?

I was thinking of making the hole in the rudder slightly larger. I would then insert a piece of soft copper tubing and attach it to a garden hose and basically power wash the inside, . Any comments?There would be enough space between the tubing and the tubing to allow outflow of silt and shell pieces.

Today I finished cleaning the wet bilge to inspect the bonding strap, everything was good. However when I measured the voltage at the strap with the silver chloride electrode in the water I only got -675

mv I dropped my zinc guppy in the water and it wend down to -725.I also checked it at the engine bonding and it was the same. I forgot to check it at the rudder.I will do that today. I assume it is caused by the inactive zinc. Again, any ideas?

Fair winds,

Eric

SM 376 Kimberlite in Lon Island, NY.

Any ideas why? I assume it is the inactive zinc on the rudder

On Sep 4, 2016, at 13:05, Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

Richard, Do you know the width/thickness  of the strap ? That's not a bad idea to tap it a bit larger or at the least run a tap through it to clean the threads up.

Thanks,Pat

-----Original Message-----
From: Richard03801 richard03801@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Sun, Sep 4, 2016 11:58 am
Subject: Re: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside

 

Hi Pat you can also tap the bolt threads one size larger to increase the surface area and provide a fresh surface. And yes as a result you'll have drill the hole in the zinc larger. 

Fair Winds Smooth Sailing 

Capt Richard Piller

Newport RI 

Cell 603 767 5330

On Sep 4, 2016, at 09:37, Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 

Eric, One of my zincs also dissolves faster than the other . My electrician found that I only had 560 at the strap. He is trying to determine if I have a leak , but we also surmised that I may have degraded continuity . I assume that there is two stainless straps welded to the rudder post that are tapped for the bolts that hold the zincs. I wonder what the thickness of the plates are , as the only contact is , the threaded area. If mud or debris found its way between the threads I assume that could lower continuity. If we cannot find any leak or other cause for the low number my electrician suggested that we add a larger zinc with two bronze studs ( better conductor than stainless) through the hull and connect to the strap or quadrant. I cannot see how you could do any harm by putting a rod up through the hole, its just an empty void , but I don't think its going to help much to clean out the i nside . I also cannot see any harm in enlarging the hole . Rinsing the inside with a hose probably would help to get some old muck out .

I would be interested to know if you get the number up.

Pat SM123

-----Original Message-----
From: kimberlite@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Sun, Sep 4, 2016 5:41 am
Subject: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside

 

I have recently noticed that one zinc on the rudder is active and the other is not. 

I believe there are S/S fingers inside the rudder which are attached to the rudder post. which in turn is attached to the bonding. Anyone have an idea as to why I might be having dissimilar erosion of the 

zincs.

I also have put a piece of threaded rod into the hole in the bottom of the rudder and a lot of black silt and parts of shells come out of the rudder. Does anyone think I am doing harm to the rudder with this 2 foot long piece of rod?

I was thinking of making the hole in the rudder slightly larger. I would then insert a piece of soft copper tubing and attach it to a garden hose and basically power wash the inside, . Any comments?There would be enough space between the tubing and the tubing to allow outflow of silt and shell pieces.

Today I finished cleaning the wet bilge to inspect the bonding strap, everything was good. However when I measured the voltage at the strap with the silver chloride electrode in the water I only got -675 

mv I dropped my zinc guppy in the water and it wend down to -725.I also checked it at the engine bonding and it was the same. I forgot to check it at the rudder.I will do that today. I assume it is caused by the inactive zinc. Again, any ideas?

Fair winds,

Eric

SM 376 Kimberlite in Lon Island, NY.

Any ideas why? I assume it is the inactive zinc on the rudder

On Sep 4, 2016, at 13:27, Alexandre Uster von Baar uster@... [amelyachtowners] <amelyachtowners@...> wrote:

Yes please!

Sincerely, Alexandre

--------------------------------------------
On Sun, 9/4/16, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside
To: amelyachtowners@...
Date: Sunday, September 4, 2016, 12:14 PM


 









I have a copy of Amel’s drawing of the rudder and
steering system.  If somebody is interested, I can post
it.


Bill KinneySM #160, HarmonieNarragansett Bay, RI,
USA“Ships and men
rot in port."http://fetchinketch.net






On Sep 4, 2016, at 13:05, Patrick
Mcaneny sailw32@...
[amelyachtowners] <amelyachtowners@...>
wrote:

Richard, Do you know the
width/thickness  of the strap ? That's not a bad idea
to tap it a bit larger or at the least run a tap through it
to clean the threads up.Thanks,Pat


-----Original Message-----
From:
Richard03801 richard03801@... [amelyachtowners]
<amelyachtowners@...>
To: amelyachtowners
<amelyachtowners@...>
Sent: Sun, Sep 4,
2016 11:58 am
Subject: Re: [Amel Yacht Owners]
Rudder , zincs, bonding, and cleaning inside

 Hi Pat you can also tap the bolt
threads one size larger to increase the surface area and
provide a fresh surface. And yes as a result you'll have
drill the hole in the zinc larger. 
Fair Winds Smooth Sailing 
Capt Richard
PillerNewport RI Cell 603 767
5330
On Sep 4, 2016, at 09:37, Patrick
Mcaneny sailw32@... [amelyachtowners]
<amelyachtowners@...>
wrote:

 Eric, One of my zincs also dissolves
faster than the other . My electrician found that I only had
560 at the strap. He is trying to determine if I have a leak
, but we also surmised that I may have degraded continuity .
I assume that there is two stainless straps welded to the
rudder post that are tapped for the bolts that hold the
zincs. I wonder what the thickness of the plates are , as
the only contact is , the threaded area. If mud or debris
found its way between the threads I assume that could lower
continuity. If we cannot find any leak or other cause for
the low number my electrician suggested that we add a larger
zinc with two bronze studs ( better conductor than
stainless) through the hull and connect to the strap or
quadrant. I cannot see how you could do any harm by putting
a rod up through the hole, its just an empty void , but
I don't think its going to help much to clean out the i
nside . I also cannot see any harm in enlarging the hole .
Rinsing the inside with a hose probably would help to get
some old muck out .I would be interested to know if
you get the number up.
Pat SM123


-----Original Message-----
From: kimberlite@... [amelyachtowners]
<amelyachtowners@...>
To: amelyachtowners
<amelyachtowners@...>
Sent: Sun, Sep 4,
2016 5:41 am
Subject: [Amel Yacht Owners]
Rudder , zincs, bonding, and cleaning inside

 I have recently noticed that one
zinc on the rudder is active and the other is not. I believe there are S/S fingers
inside the rudder which are attached to the rudder post.
which in turn is attached to the bonding. Anyone have an
idea as to why I might be having dissimilar erosion of
the zincs.I also have put a piece of
threaded rod into the hole in the bottom of the rudder and a
lot of black silt and parts of shells come out of the
rudder. Does anyone think I am doing harm to the rudder with
this 2 foot long piece of rod?I was thinking of making the hole
in the rudder slightly larger. I would then insert a piece
of soft copper tubing and attach it to a garden hose and
basically power wash the inside, . Any comments?There would
be enough space between the tubing and the tubing to allow
outflow of silt and shell pieces.Today I finished cleaning the wet
bilge to inspect the bonding strap, everything was good.
However when I measured the voltage at the strap with the
silver chloride electrode in the water I only got -675 mv I
dropped my zinc guppy in the water and it wend down to
-725.I also checked it at the engine bonding and it was the
same. I forgot to check it at the rudder.I will do that
today. I assume it is caused by the inactive zinc. Again,
any ideas?Fair winds,Eric
SM 376 Kimberlite in
Lon Island, NY.Any ideas why? I assume it is the
inactive zinc on the rudder











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Richard, Do you know the width/thickness  of the strap ? That's not a bad idea to tap it a bit larger or at the least run a tap through it to clean the threads up.

Thanks,Pat

-----Original Message-----
From: Richard03801 richard03801@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Sun, Sep 4, 2016 11:58 am
Subject: Re: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside

 

Hi Pat you can also tap the bolt threads one size larger to increase the surface area and provide a fresh surface. And yes as a result you'll have drill the hole in the zinc larger. 

Fair Winds Smooth Sailing 

Capt Richard Piller

Newport RI 

Cell 603 767 5330

On Sep 4, 2016, at 09:37, Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 

Eric, One of my zincs also dissolves faster than the other . My electrician found that I only had 560 at the strap. He is trying to determine if I have a leak , but we also surmised that I may have degraded continuity . I assume that there is two stainless straps welded to the rudder post that are tapped for the bolts that hold the zincs. I wonder what the thickness of the plates are , as the only contact is , the threaded area. If mud or debris found its way between the threads I assume that could lower continuity. If we cannot find any leak or other cause for the low number my electrician suggested that we add a larger zinc with two bronze studs ( better conductor than stainless) through the hull and connect to the strap or quadrant. I cannot see how you could do any harm by putting a rod up through the hole, its just an empty void , but I don't think its going to help much to clean out the i nside . I also cannot see any harm in enlarging the hole . Rinsing the inside with a hose probably would help to get some old muck out .

I would be interested to know if you get the number up.

Pat SM123

-----Original Message-----
From: kimberlite@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Sun, Sep 4, 2016 5:41 am
Subject: [Amel Yacht Owners] Rudder , zincs, bonding, and cleaning inside

 

I have recently noticed that one zinc on the rudder is active and the other is not.

I believe there are S/S fingers inside the rudder which are attached to the rudder post. which in turn is attached to the bonding. Anyone have an idea as to why I might be having dissimilar erosion of the

zincs.

I also have put a piece of threaded rod into the hole in the bottom of the rudder and a lot of black silt and parts of shells come out of the rudder. Does anyone think I am doing harm to the rudder with this 2 foot long piece of rod?

I was thinking of making the hole in the rudder slightly larger. I would then insert a piece of soft copper tubing and attach it to a garden hose and basically power wash the inside, . Any comments?There would be enough space between the tubing and the tubing to allow outflow of silt and shell pieces.

Today I finished cleaning the wet bilge to inspect the bonding strap, everything was good. However when I measured the voltage at the strap with the silver chloride electrode in the water I only got -675

mv I dropped my zinc guppy in the water and it wend down to -725.I also checked it at the engine bonding and it was the same. I forgot to check it at the rudder.I will do that today. I assume it is caused by the inactive zinc. Again, any ideas?

Fair winds,

Eric

SM 376 Kimberlite in Lon Island, NY.

Any ideas why? I assume it is the inactive zinc on the rudder