It has been a few months since I removed the Fuller portlight but what I recall 
is the water seeped between the outer flange and the inner flange leading to 
the opening.  The original molded piece had been damaged by years of crew 
resting a knee or foot on the flange when working the cabin top winches.

When we bought the boat in 98 I looked the joint over and it appeared to be 
water tight.  What I found when I removed the portlight was rain/spray water 
worked its way between the inner and outer flanges.  The original Fuller 
portlight installer (not Bruckmann) did not seal the exposed balsa.  I became 
aware of the problem when water began leaking out of an interior screw hole 
near the bridge deck / vertical bulkhead intersection.

My guess is the water intrusion started 20 to 30 years ago.  By mid April I 
will have rebuilt the affected areas with West System epoxy, new balsa, and new 
glass layup. The boat may heel a little to starboard after this but my repairs 
will outlast the rest of the boat.

Martin
Calypso
1970 C&C 43
Seattle
________________________________
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Della Barba, 
Joe
Sent: Friday, March 01, 2013 1:31 PM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List port replacement on 29Mk1

My original 1973 Fuller port is working as well as ever. I am not sure where 
water gets in between ????

Joe Della Barba
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