Thanks, Chuck. In the case of my DST-800, I discovered the old unit was only 1/8" larger, so I am going to re-use the hole and install with 4200. But I may need to fill some other holes as I go along, this is good info.
-- Shawn Wright shawngwri...@gmail.com S/V Callisto, 1974 C&C 35 https://www.facebook.com/SVCallisto On Wed, Mar 24, 2021 at 10:53 AM CHARLES SCHEAFFER <cscheaf...@comcast.net> wrote: > The number of layers needed is driven by the weight of the cloth chosen > and how thick the hull is there. I'd use 1708 as it is so easy to work > with. It's two bias layers of 8oz roving stitched to some 1 1/2 oz glass > mat. Measure the thickness of the hull after removing the thru-hull. > Multiply that by 12 to mark a circle around the hole. Then grind a bevel > from the hole out to the mark. Cover the hole from the inside with some > mylar sheet, taped tight to the surface. > > IIRC, 5 layers of 1708 yielded about 3/16" thickness, four or five layers > is max I would lay up, then wait till it's tacky like an hour or so. Then > lay up four or five more layers and wait for it to cool and get tacky and > lay up more layers. I use peelply to draw off the excess resin with a fin > roller and if you let it cure overnight with peelply, you can avoid sanding > before applying more layers the next day. Repeat till the repair is higher > than the surrounding surface and let it cure and grind flush. > > Here is a good video that shows some good tips for West System and 1708. > https://www.youtube.com/watch?v=aSKbF6jGJKw&t=2009s > > Chuck S > > On 03/24/2021 10:54 AM Shawn Wright via CnC-List <cnc-list@cnc-list.com> > wrote: > > > How many layers of glass should I be using on the outside for blocking a > through-hull? Glass on the inside also, or just fill with epoxy? Some of > mine have limited access on the inside for creating a taper. > > -- > Shawn Wright > shawngwri...@gmail.com > S/V Callisto, 1974 C&C 35 > https://www.facebook.com/SVCallisto > > On Tue, Mar 23, 2021 at 3:59 AM Dave S via CnC-List < > cnc-list@cnc-list.com> wrote: > > If I get the math you are going from two through hulls to one - I did the > same and removed my overboard discharge at the same time. > > Why not eliminate the unused holes? It needs to be done properly for sure > but it’s not difficult. > > Some pics here: > > > http://cncwindstar.blogspot.com/2016/08/repair-of-keelhull-joint-closing.html?m=1 > > Dave > 33-2 > > > > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - > Stu > >
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
