Corrosion on Elnora's Intermediate Shaft Support

A surveyor, last year, found that Patrick Mitchell's Elnora 37VT37 had a badly corroded plug in the propellor shaft's intermediate bearing.  

The plug was installed inplace of a hose fitting when Elnora was upgraded with a PYI dripless packing gland.  

Patick picks up the story:

My survey last year discovered a corroded bolt that was in the place of shaft hose. This bolt was threaded in as a plug.  Looks square on the top. I took some before and after pics after scraping away green corrosion.  My dripless PYI seal is fine but your newsletter comments are timely for me.  I am tempted to think my corrosion is related to your concerns.