Thanks Josh, I am doing the work over the winter layup in Toronto so days above 5 degrees that epoxy requires to cure can be few and far between. I am hoping to skip filling the existing hole with thickened epoxy by using an appropriately sized plug on the hold saw. To answer your questions, I am just going with temp and depth as it's simpler, less expensive and gives me sonar on the same transducer. I know having a speed transducer is useful for determining current, however I would rather have the sonar (for anchoring not fishing). A friend has a shoot through the hull depth transducer on his boat and it seems very flakey. He sails in Georgian Bay where shoals and rocks abound, his transducer always seems to give up when we need it most.
Cheers, Doug On Wednesday, October 30, 2019, 09:23:59 a.m. EDT, 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 WelchCeltic 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
_______________________________________________ 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