De-Bond will dissolve 5200 (so will gasoline, but don't pour it in the bilge). West and other places sell it.
If you have to re-drill, pound in a wooden emergency plug so the center bit has something to bite into. Joel On Wed, Oct 30, 2019 at 9:23 AM Josh Muckley via CnC-List < cnc-list@cnc-list.com> wrote: > As I understand it, that location forward of the keel was expected by the > designers to be the location for the speed and depth transducers. As such > the hull is solid in that location. > > If you drill it out and find otherwise then a typical removing of the core > while leaving the inner and outer skins in place would be appropriate. Dig > the core back as far as possible. With a 52mm hole, angling a drill bit > and other various implements should be pretty easy. Back fill the cavity > with thickened epoxy, allow to cure, and redrill the 52mm hole as needed. > Install the transducer with 5200. > > You will most likely find that the original was bedded with 5200 and will > not come free. There are products available that are supposed to > loosen/weaken 5200. Try them first but it may still take days of soaking. > If that fails then a sanding drum on a drill can make pretty short work of > the plastic and 5200. For the new hole, a hole saw typically needs the > drill bit to center and stabilize the drum but with a 32mm hole already > there it can be difficult. Create a stabilizing core by getting a hole saw > that fits the existing hole (either in the hull or in the existing > transducer fitting) and drill a plug from a 2x4. Now change the saw to > your 52mm and slide the wood plug over the drill bit. The plug will act as > a centering guide as you drill the new hole. Depending on the size of the > old fittings this may be sufficient and pre-removal may be unnecessary. > > I find biological growth to fowl my speedwheel constantly during the > summer months. I'm frequently removing the speedwheel with the boat in the > water resulting in a small geyser. To avoid this I am seriously > considering an ultrasonic speed sensor. Have you considered this > yourself? I would like even more if I could find one that was able to be > glued to the inner hull and simply shoot through. I know some depth > transducers are made this way but speed is a different story. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > On Wed, Oct 30, 2019, 8:55 AM Doug Welch via CnC-List < > cnc-list@cnc-list.com> wrote: > >> It's time to replace the B and G Network Quad instruments on my 33-2. >> This means replacing the old 32 mm paddle wheel speed transducer with a 52 >> mm airmar transducer. I understand that the 33-2 is partially cored hull, >> so my question is the area where the transducers are currently located >> cored. They are located in the locker at the foot of the vberth. Any other >> advice on removing the old and installing the new is gratefully received. I >> went with a Garmin Echomap plus cv75 and sonar,depth, temperature >> transducer. >> >> Cheers, >> Doug Welch >> Celtic Knot >> 33-2 c/b >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > -- Joel 301 541 8551
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
