Replaced the old 1 1/2" speed and depth through hulls w new style 2" thru-hulls 
two years back. 
The newer style AirMar sleeves are much better including a spring loaded 
shutoff so when you pull the speedo, less than a teaspoon of water leaks in. 
Before about two cups of water would sneak in, but now I pull the speedo after 
each sail because it's so easy. It makes it so easy to keep the paddlewheel 
clean. 

I removed the old plastic thru-hulls and enlarged the holes using a hole saw. 
Cut a wooden plug from several layers of plywood that fit the old hole and that 
kept the hole saw centered. All thruhulls on Resolute are flush, the balsa core 
is cut back several inches from thru-hull locations and the inner layers are 
bonded to the outer layers, and the sleeve is countersunk into the outer hull 
surface about 1/4". The hull laminate is about 3/4" thick along the centerline 
making a fiberglass keelson. Used a dremel to chamfer the edge and West System 
epoxy and 404 filler to seal the edges of glass and get a good fit. Then 4200 
the sleeves in place, snugged up the collar washers inside, and faired over to 
make a racing bottom finish. The wooden plug was the trick that made it all 
work. I took a few pictures if anyone is interested? 


Chuck 
Resolute 
1990 C&C 34R 
Atlantic City, NJ 
----- Original Message -----
From: "Rich Knowles" <r...@sailpower.ca> 
To: cnc-list@cnc-list.com 
Sent: Friday, December 20, 2013 1:41:48 PM 
Subject: Re: Stus-List In hull transducer location 

Whatever works for you. Don't let the hole size become a problem. It's not. 

Rich 

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