You can also use 2 hole saws. One the size of the original hole ; One the size of the new transducer. Mount them both on the same arbour (I'm told Harbour Freight in the US sell them). You need a longer arbour to mount both hole saws together. The smaller saw centres in the old hole, the larger cuts your new hole. Sam Salter C&C 26 Liquorice Ghost Lake Alberta
Tapered wood emergency plugs available from chandleries make great centring devices for the hole saw. Drive them gently into place. Mark about 1/4" from the outside of the hull, remove, cut off the external excess, mark the centre, replace and drill away. Rich On Dec 20, 2013, at 7:14 PM, Chuck S <cscheaf...@comcast.net> wrote: 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 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 This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com | ||
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