[C320-list] Autoprop Zinc

[Jon Vez]

Larry,

Interestingly enough, prior to this past season I had to replace my AP zinc
twice a season even though my shaft zinc (Godfrey) would be fine for the
year. This season I kept her in the water over the winter (Boston) and the
diver said my zinc showed almost no deterioration. This was from about
October to May. He attributed some of that to most boats other than live
aboards being out and the colder water in the winter. I'll have the zincs
checked again in about a month and will be interested to see how they are. I
bought a bunch from AB this spring.

One of the members of this list did a test with zincs that were sold on the
net for less money. Apparently they were lighter than the AP purchased zincs
and therefore not really cheaper at the end of the day--just like buying
cereal with less in the package for the same price--

Regards,

Jon Vez
Solstice #582

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Larry Frank
Sent: Wednesday, June 18, 2008 10:32 PM
To: 'C320-List'
Subject: [C320-list] Autoprop Zinc

For those with Autoprops....

 

For years I would get two years out of an Autoprop zinc.  In fact, I
replaced them as a preventative maintenance item when I had the bottom
repainted.  They hardly showed any corrosion.

 

WindSwept stays in the water year around.

 

The last few zincs have not lasted very long.  About three months.

 

I don't think it is a stray current problem because the zincs on the strut
and the shaft aren't corroding at a quicker rate and I did a voltage survey
following the instructions that came with my corrosion test meter which came
up negative for stray current.

 

I have purchased the zincs from the Autoprop people - AB Marine.

 

Has anyone else noticed a sharply reduced zinc life?  I am wondering if the
zincs themselves are inferior.

 

Larry

WindSwept C320 #246