Shaft size

[mregan]

Anyone happen to know the shaft size on the MK I.  I'm going to the Defender sale tomorrow and wanted to pick up a bunch of zincs.

[Clay Greene]

My memory and the manual agree it is one inch exactly.

[Dave Spencer]

Shaft is 1".  I like magnesium "zincs" for fresh water.

[Ron Hill]

mre : The shaft is 1 inch diameter.
 
To get a Zn that makes the best contact on the shaft look for the ones that have a "BB" inside.

a thought

I wouldn't think that Rhode Island location was fresh water?

[Clay Greene]

Dave is right about zinc not working in fresh water.  My Flexofold prop came with a zinc anode that I replaced after the first year. There was no evidence of pitting on it so it was not doing anything.  The magnesium anode showed significant "sacrifice" after one of our short seasons. 

[Jim Hardesty]

it's getting off the subject  but more info for fresh water sailors

http://www.boatmichigan.org/news_detail.aspx?ID=128

http://www.martyranodes.com/content/index.php

Jim