[C320-list] Was leaving list, now zinc question for Orlando

[John Van Vessem]

Bruce,
 
I agree that the strut appears to be isolated however, I can attest to the fact that the zinc on my strut gets eaten up in 9 months, so there is something going on there.  Perhaps the cutlass bearing is conductive.
 
John Van Vessem
Sojourn 645
Vallejo Yacht Club 



----- Original Message ----
From: Bruce Heyman <BruceHeyman at cox.net>
To: C320-List <c320-list at catalina320.com>
Sent: Friday, December 15, 2006 1:05:09 PM
Subject: Re: [C320-list] Was leaving list, now zinc question for Orlando


Wes etal,
I do not have a zinc on my strut and did not see a place to affix one.  I
suppose it would not be hard to drill and tap a couple of holes, tap them
and install a zinc. That said I'm not sure why you need one.  Some builders
bond everything metal that is in the water (through hulls, strut, shaft,
keel...) to a central location including the engine and rigging.  My last
boat was that way.  We didn't have a zinc on the strut then either as the
conventional wisdom was that it was electrically boded to the shaft and the
zinc's (we always kept two) on the shaft were close enough to keep it
protected.
I just checked on our 320 (hull #671) it would appear that the strut is
electrically isolated and hence does not need a zinc.  Is there a connection
that I'm not seeing?
Thanks,
Bruce
Somerset 671 SoCal

-----Original Message-----
From: c320-list-bounces at catalina320.com
[mailto:c320-list-bounces at catalina320.org] On Behalf Of
Wes.Giles at averydennison.com
Sent: Thursday, December 14, 2006 11:26 AM
To: C320-List
Subject: Re: [C320-list] Was leaving list, now zinc question for Orlando

Jon,

I always had two on my 320 in So Cal (marina del rey). The strut and the 
shaft. I know have one on the prop and one in the water on my 387.

Wes



jonvez at comcast.net 
Sent by: c320-list-bounces at catalina320.com
12/14/2006 10:02 AM
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[C320-list] Was leaving list, now zinc question for Orlando






Orlando,

You say you used a zinc on the strut of CL2? Just curious as to why since 
it would be an isolated piece of metal? You have me concerned now since I 
have never protected the struts on either my 30 or 320....

As for the other questions, our marina has no problem with divers and I 
have the diver check and clean the bottom in the middle of the summer. 
Never have had an issue with my shaft zinc--it's the prop zinc that I need 
to watch.

I used 2 zincs for years, but my diver convinced me to try just one this 
season and after about 7 months in the water, it proved to be just 
right--just about half gone. I use Godfrey zincs which seem to work much 
better than the Canada zincs you find in West.....

Regards,

Jon Vez

-------------- Original message -------------- 
From: Orlando.Duran at AveryDennison.com 

> John, 
> 
> My dive service routinely replaces zincs as they are wearing out...here 
in So 
> Cal that would be every 4-5 months...on the 320 they would replace the 
shaft and 
> strut zincs and on the 440, I purchased 6 zincs from Flex-O-Fold that go 
on the 
> end of the prop that I will give to the diver so that it will be 
installed as 
> needed... 
> 
> Any reputable dive service should include zincs as part of their overall 

> maintenance service for you... 
> 
> Have a great time on the 36! Is delivery eminent? 
> ---------------------------------- 
> Regards, 
> OD 
> 
> Sent from my BlackBerry Wireless Handheld 
> 
> 
> ----- Original Message ----- 
> From: John Van Vessem [jvanvessem at sbcglobal.net] 
> Sent: 12/10/2006 07:58 AM 
> To: C320-List 
> Subject: [C320-list] Leaving the 320 list 
> 
> To all my friends on the 320 list I just want to say what an educational 

> pleasure it has been to read these conversations, I am moving to a 36 
and hope 
> to join their list if they have one. I'm going to miss my 320 it has 
been an 
> incredible boat and the whole reason I'm sticking with Catalina. 
> 
> Before I leave I need to tell you about a recent experience. My 320 was 
> surveyed for the new owner and when we hauled it out of the water we 
found that 
> the bronze shaft had corroded down by about 1/8 inch in diameter, the 
zinc was 
> missing and was only 10 months old. Bottom line I had to spring for a 
new 
> shaft, stainless this time. Replacing the zincs has not been in my 
standard 
> maintenance routine. But after talking to the 320 dealer he suggested 
that the 
> zincs be replaced every couple of months. I'd like to hear what other 
people 
> have experienced who keep their boat in the water all year. 
> 
> John Van Vessem 
> Sojourn 645 
> Vallejo Yacht Club 
> 
> 
> -------------------------------- 
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> 
> 
> 




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