You don't need to bevel. Just use the groco as a mold. Wax it so epoxy doesn't stick to it. Rough up the old hole with 80 grit paper, acetone wipe, then fit the groco into the hole so you can pour in a filler, maybe use string to hold it in place, then mix up an epoxy filler such as West and 404 high density. Keeping the Groco how you want it, and secure, pour in the filler. Let it harden a day. Then remove the groco by unscrewing it. Check there are no voids in the filler, and clean off the amine blush with a 3M pad and install the groco w 4200 or whatever you use.
Option B is to place a sheet of plastic sheeting over the hole from underneath and brace it against the outside of the boat with a boat cushion and fill the hole from inside. Let it harden and then drill a new hole with a hole saw. Chuck Resolute 1990 C&C 34R Atlantic City, NJ ----- Original Message ----- From: "CNC boat owners, cnc-list" <[email protected]> To: "CNC boat owners, cnc-list" <[email protected]> Sent: Thursday, May 8, 2014 11:43:01 AM Subject: Stus-List Through-hull hole size I took out the old Datamarine Sandpiper transducer that was installed with a hole size of 2-1/16". My intention is to put a grocco 1-1/2" scoop strainer. OD for this fitting is 1.9". Does anyone know or has experience with this decision? Is 2-1/16" close enough to be called slightly larger than 1.9" or is the hole size too big and I need to grind out a hole to a 12:1 bevel, then glass it, fill with epoxy and drill a new hole? Petar Horvatic Sundowner 76 C&C 38MkII Newport, RI _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com [email protected]
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