Sorry
to not address you by your name but I did not see your name in the
e-mail.
I
cannot comment on the source of your particular issue. However if you are
connected to shore power in a marina or harbor without a galvanic isolator, you
are exposing the boat to a high risk of electrolysis depending on your
particular location, wiring and boats surrounding you.
I
would highly recommend the installation of a galvanic isolator to prevent
creating an unintended electrical circuit. Olivier recommended the install on
our 54 during the survey. The installation is fairly straight forward and it
took us a couple of hours to get done.
Respectfully;
Mohammad and Aty
B&B Kokomo
Amel 54
#099
From: amelyachtowners@...
[mailto:amelyachtowners@...] Sent: Tuesday, January 09,
2018 8:11 PM To: amelyachtowners@... Subject:
[Amel Yacht Owners] electrolysis on jib furling gearbox? [1
Attachment]
Greetings and Happy New Year,
I’m new to the group having purchased “Liebling” SM hull #207
In June 2017. Now she is “La Querida” berthed in Moss Landing,
California.
Over the last several months I noticed something like grease
dripping out from the jib furling gearbox and finally dismantled it last
weekend. In general it was in reasonable shape for a 20 year old
gearbox. However the aluminum disc on the out put shaft showed
considerable pitting which I interpret as electrolysis. On my particular
box, the aluminum is in contact with a bronze or brass bushing. I did some
reading on line and was quite alarmed to learn that neighboring boats and poor
grounding of the marina shore power apparently can accelerate electrolysis on a
well designed and maintained boat such as our Amels. So two
questions:
Has anyone else
experienced this electrolysis on the aluminum disc on top of the
gearbox? (or is mine indicative of a bigger problem)
I briefly investigated
galvanic isolators as protection for poorly grounded shore power. Is
this worthwhile?
Thanks in advance.
BTW our plans are to cruise to Mexicos west coast after
retirement in about 3 years. Saludos a todas!
