Re: [Amel Yacht Owners] SM Jib Furler Failure.

Bill Kinney <greatketch@...>

There are many things connected to the bonding system that aren’t themselves being protected from corrosion by such a connection.  The bonding connections are not ONLY about corrosion protection by connection to the rudder zinc.

In a boat where the DC neutral and the bonding system are deliberately connected, it could serve as a return path to the battery in case of a leak from the positive side of the DC system to the case of the motor.  I confess to not really having a good understanding of the logic in connecting things like the bilge pump or the freshwater pump to the bonding circuit in an Amel.  It certainly is not to protect them from corrosion by connecting them to the rudder zinc.

By the way, does anybody know offhand the size of the rivets in the furler?

Bill Kinney
SM #160, Harmonie
Reedville, VA, Chesapeake Bay, USA
“Ships and men rot in port."

On Sep 22, 2016, at 22:20, Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:

That makes sense, Bill.  Guess I was thinking of sea water on furler, deck, hull all interconnecting as if submerged.

So the furling motor is not bonded to the zincs?  What about the bow thruster?  If have sworn they were both connected via the yellow/green wires.

I'll be back aboard next week and look again.

SM 243

On Sep 22, 2016, at 7:56 PM, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:



Bonding would have no effect on corrosion here. The zinc that is attached to the bonding system has to be in the same “body of water” as the metals it is protecting.  In this case the “body of water” is the tiny little puddle between the stainless steel screws and the aluminum plate. It is its own little battery, and connections to the rest of the boat are immaterial. These stainless screws seem to have been the focal point for the corrosion on my piece.  

Other than disassembling the furler unit, this is an easy fix.  The plate is just a round piece of 1/4 inch aluminum with four holes in it.  If I was in a remote place, I could make it on the boat with hand tools.

While I have things apart, I am taking Kent's suggestion and finding a local powder coat shop to have everything made pretty… hopefully for much longer than paint.

Bill Kinney
SM #160, Harmonie
Reedvile, VA, Chesapeake Bay, USA
“Ships and men rot in port."

On Sep 22, 2016, at 17:37, Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:


I don't know if the furler on Kristy is connected.  Sure seems like it should to sea water, dissimilar metals.  Wonder why it wouldn't be?  Anybody else know if their furler is connected?


Kent Robertson
828-234-6819 voice/text

On Sep 22, 2016, at 5:02 PM, divanz620@... [amelyachtowners] <amelyachtowners@...> wrote:


Hello Kent,

None of the rigging on my SM is attached to the bonding system.....

Elyse SM437

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