Zinc on 1968 McGlasson Islander 34 - SailNet Community
 
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post #1 of 4 Old 10-24-2011 Thread Starter
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Question Zinc on 1968 McGlasson Islander 34

Howdy, I'm new to this forum. I have a 1968 Islander 34. Problem with zinc placement. There is only 5/8-inch clearance between the shaft bearing and the prop, nowhere close to enough space for a collar zinc. The diver could not visually locate any place to attach a zinc, not even on the rudder post.

Is anyone familiar with this question for the McGlasson Islander 34?

The diver DID report that even after a year or more of NOT having any zincs, there is not evidence of electrolysis in the prop or shaft. There is minor pitting, evidently, but according to the diver, he did not view that as resulting from electrolysis.

I am assuming a zinc is needed? But if so, where can it be attached?

Dave
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post #2 of 4 Old 10-24-2011
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A zinc after the prop nut possibly.
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Brian
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McGlasson Islander 34 zinc

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Originally Posted by mitiempo View Post
A zinc after the prop nut possibly.
Thanks! Just now googled on it, and a prop nut anode seems like a possibility. Apparently they sell the nut with the zinc attached, am looking for sizing info.

Looks like a good possible solution.
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post #4 of 4 Old 10-25-2011
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Quote:
Originally Posted by Wayfarer34 View Post
Thanks! Just now googled on it, and a prop nut anode seems like a possibility. Apparently they sell the nut with the zinc attached, am looking for sizing info.

Looks like a good possible solution.
This is what you want:



The zinc size appellation is determined by your prop shaft diameter. For instance:

3/4" shaft = "A" prop zinc
7/8" shaft = "B" prop zinc
1" & 1 1/8" shaft = "C" prop zinc
1 1/4" shaft = "D" prop zinc

etc., etc., etc.


Good online source for all things zinc:

BoatZincs.com (978-841-9978) – The Online Superstore for Zinc Anodes
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