I have a in-hull transducer for depth and I don’t experience any issues. The
only problem that you may see is if the liquid (antifreeze) in the body
evaporates or leaks. But adding a few cubic cm3 of AF helps immediately. This
is a question of checking it before leaving on a trip or standard periodic
maintenance.
My system is Garmin GPSMAP 420s with an Arimar P79 transducer.
Marek
1994 #122 ”Legato”
Ottawa, ON
From: CnC-List On Behalf Of Doug Welch via CnC-List
Sent: 30 October, 2019 09:43
To: Josh Muckley via CnC-List <cnc-list@cnc-list.com>
Cc: Doug Welch <doug.we...@rogers.com>
Subject: Re: Stus-List Advice on replacing 33-2 BandG 32mm transducer with
Airmar 52mm transducer
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<mailto: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<mailto: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
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every one is greatly appreciated. If you want to support the list - use PayPal
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_______________________________________________
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
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