Peter: you should be able to see where the lead/fibreglass join is on the outside. If you have a sump at all, and I'm sure you do, your drill should emerge at or just above the juncture. If you don't like the ⅛" hole, plug it. No big deal.
Rich > On Nov 5, 2013, at 15:55, "Petar Horvatic" <phorv...@gmail.com> wrote: > > Rich, > your explanation is great, it makes perfect sense. So I got the drainplug, > and I went over there last weekend to look at the possible location. I > don’t have a lot of confidence that if I drill horizontally sideways, from > the lowest point in the bildge, (what I believe you describe as the 90 deg > angle), I will actually end up perpendicular to the bottom surface on the > outside. I don’t know how deep LF38 bildges are but on 38MkII, bildge is > very shallow. If I end up higher then intended it could be very bad as the > bottom profile quickly turns from vertical to horizontal. My intuition > suggests that I might need to drill at like 30 or 45 deg angle from > horizontal in order to end up perpendicular to the bottom surface on the > outside. Maybe I just need to overcome my fear, but I wish there is a way > to find out what lowest point in the bildge projects to on the outer side of > the hull without actually drilling a pilot hole. Maybe a pic of an actual > 38MkII , and not a landfall or ideally a cross-section drawing of the > keel-hull join showing hull thickness would indicate exactly how to drill. > > Petar Horvatic > Sundowner > 76 C&C 38MkII > Newport, RI > > > > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Rich > Knowles > Sent: Wednesday, October 23, 2013 4:06 PM > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Installing a garboard drain plug on 38MkII > > Peter: Using a 90 deg. angle drill, I drilled a 1/8" pilot hole out from the > interior of the boat at the intersection of the bilge wall and floor at the > lowest point in the bilge. > > I then used a Forstner bit the same diameter as the outside of the flange of > the drain casting to create a recessed hole in the hull exterior the depth of > the thickness of the flange plus a bit for caulking. > > Once the outer hole was drilled, I drilled the hole for the neck of the drain > casting deep enough to allow the casting to sit flush with the hull. I then > used a 1/2" drill at an up angle into the bilge floor to create the water > passage from the bilge floor into the casting. Three 1 1/4" #10 flat head > self tapping screws and some 5200 hold and seal the casting in place. I note > that the flange straddles the hull/keel joint with the majority of the > fitting and two of the three screws in the hull. The third screw is in the > lead. No problems to date. That includes dropping and replacing the keel > during my recent post grounding repair. > > There are nylon or bronze plugs with hex sockets available if the notion of > drag caused by the protruding square bolt head impeding perfect water flow > bothers the racing mentality at all. Personally, I can't tell the > difference:). One could also cut the bolt head off the threaded portion and > saw a kerf for a large screwdriver in the end of the threaded bit. > > That little gadget is one of the best additions to the boat as it ensures the > bilge dries out completely every haul out and stays that way. I leave a large > note to myself to replace the plug in the spring:) > > Rich Knowles > Indigo > 1981 LF 38 > Halifax. NS > > On Oct 23, 2013, at 15:16, "Petar Horvatic" <phorv...@gmail.com> wrote: > > Does anyone have pics or advice on how best to install a garboard drain plug. > Shallow bildge and external lead keel make it pretty difficult to have > something that is flush on the outside yet encompass the lowest point in the > bildge to allow water to drain. > > Petar Horvatic > Sundowner > 76 C&C 38MkII > Newport, RI > > > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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