cutwater upgraded transducer

TristenT

TristenT

Well-known member
Joined
Nov 23, 2023
Messages
63
Fluid Motion Model
C-28
Vessel Name
Positive motion
Wondered if any one has upgraded their transducer on a c28 or similar model boat, looking to see how you did it and any good notes.
specifically looking at going the through-hull or transom mount route to get a better transducer for fishing.
I am currently running a GPSmap 1243xsv with the original transducer.
 
Bumping post delayed in moderation queue.
 
I installed a transom mounted transducer to my R-23. My Garmin model is different than yours (7610xsv). Garmin’s website has a way to make sure you get a compatible transducer for your map unit. My unit allowed a second transducer to plug and play. I needed another 10’ of cable to reach the unit. Fishing the cable through, after drilling your hole, isn’t great fun (I used a fish tape).
 
Hamster":111edg23 said:
I installed a transom mounted transducer to my R-23. My Garmin model is different than yours (7610xsv). Garmin’s website has a way to make sure you get a compatible transducer for your map unit. My unit allowed a second transducer to plug and play. I needed another 10’ of cable to reach the unit. Fishing the cable through, after drilling your hole, isn’t great fun (I used a fish tape).
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I am leaning towards this route seems a lot easier to just run a transom mount transducer. Iv been wondering how they do while underway though heard a little that it might not read great.
How well did the in hull transducer work for compared to your new transom mount.
 
TristenT":2q70pgm2 said:
I am leaning towards this route seems a lot easier to just run a transom mount transducer. Iv been wondering how they do while underway though heard a little that it might not read great.
How well did the in hull transducer work for compared to your new transom mount.
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I’ve heard the same about running with the transom mount. But I have both. I use the transom mount for ClearVu, which helps when targeting bottom fish, shallow water, or trying to discern whether it is really bait in the water column. I’d probably prefer to cut a hole in my bottom and get a good transducer but I’m not convinced my fishing would improve enough to justify putting a hole in the boat (and my wallet).
 
I think your set up running both transducers is a good way to go. Gamrin sells some packages with a in hull and transom mount transducer together. My GPSMAP can only run one transducer but im guessing I could run a second transducer on my backpack GPSMAP as well. I know its simple to run a through hull transducer but id really prefer to not drill holes in the boat.
 
TristenT":1vxky5o0 said:
I think your set up running both transducers is a good way to go. Gamrin sells some packages with a in hull and transom mount transducer together. My GPSMAP can only run one transducer but im guessing I could run a second transducer on my backpack GPSMAP as well. I know its simple to run a through hull transducer but id really prefer to not drill holes in the boat.
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If your Map Unit has just one spot for a transducer, I’m pretty sure Garmin has a splitter that would go into the unit to allow two transducers. Call Garmin marine tech folks. They were helpful to confirm what I needed.
 
my main unit can only support one transducer they told me the splitter wouldn't work
 
I've got an in-hull transducer, but it doesn't have today's features nor CHIRP. Since we do a lot of fishing in deep water I installed a transom transducer ( GT52HW-TM ). I thought it would perform like my previous transom transducers and drop out above 25 MPH, but to my surprise it seems to work well at WOT - 42 MPH.

If I stayed in shallow water I might have opted for a different transducer, but this works great in 50 feet and deeper and appears to work okay in shallow water as well. Really happy with the clearview and use it more than the others.
 
HookedUp":33upiljy said:
I've got an in-hull transducer, but it doesn't have today's features nor CHIRP. Since we do a lot of fishing in deep water I installed a transom transducer ( GT52HW-TM ). I thought it would perform like my previous transom transducers and drop out above 25 MPH, but to my surprise it seems to work well at WOT - 42 MPH.

If I stayed in shallow water I might have opted for a different transducer, but this works great in 50 feet and deeper and appears to work okay in shallow water as well. Really happy with the clearview and use it more than the others.
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good to hear on that I am pretty sure ill just do a similar transom mount transducer as well
 
Mr. TristenT, The one big huge thing that is different about an inboard boat is that the propellers are in front of the transom and will generate turbulence across the rear of the boat making a transom mounted transducer useless. The advice you have been given is great for outboards, but not for a C-28 diesel inboard. You are comparing apples to oranges! Bob
 
Bob, I'm glad you posted about inboards. I didn't think about it at the time. My inboards had outdrives so transom transducer was fine. I have seen one transom transducer on an inboard, but it was mounted at the far port side of the transom and I was told it worked fine. I'm not sure I'd risk it myself unless I knew ahead of time that the water there was undisturbed.

Thanks again for pointing out the difference in inboards for transom transducers.
 
The prop wash from the inboard will for sure cause some issues at higher speeds which Im not all that concerned with, I think I found some one on Facebook that mounted a transom transducer on looks to be a c28 hoping to hear back from them on how that worked out. Id be happy to mount a thru hull transducer but I am not sure where on the c28 hull would be the best location that is accessible.
 
Why not use the location where the in-hull one is located? The installation of a through-hull transducer is a piece of cake once you get past the thought of drilling a 2 1/2 inch hole in the bottom of your boat! Prior to my installation on my boat I contacted a boat repair shop and ask what they charged to fix a hole about 3 inches on the bottom of my boat (insurance policy), watched you tube and how to videos, measured about a 100 times. It took one afternoon to install and have not had a problem since!
Best of luck, Bob
 
bob daily":zxfq5eb0 said:
Why not use the location where the in-hull one is located? The installation of a through-hull transducer is a piece of cake once you get past the thought of drilling a 2 1/2 inch hole in the bottom of your boat! Prior to my installation on my boat I contacted a boat repair shop and ask what they charged to fix a hole about 3 inches on the bottom of my boat (insurance policy), watched you tube and how to videos, measured about a 100 times. It took one afternoon to install and have not had a problem since!
Best of luck, Bob
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I am out of town right now so I can't take measurements or get a better look to see if that location would work. my concern is that it is too bar forward.
 
Mr. TristenT, I would think that with the C-28's unique hull design the engineering team at FludMotions would of designed and located the depth transducer in the best place for access and performance. All you would be doing is upgrading the transducer to a more reliable, less maintenance free one. Why reinvent the wheel? Bob
 
my cut 28 has a transom mounted transducer in addition to the standard on hull transducer. its mounted quite far to starboard by the previous owners and Ive never hooked it up to the Garmin. I think they were planning on running it to a second screen mounted in the cockpit for trawling at low speeds.
 
I think the in-hull transducer was more a time/$ saver for fluid motion not so much what was the best choice for a transducer. Granted most cutwater owners aren't doing all that much fishing it makes sense they wouldn't outfit the boat with a higher end transducer. One of the primary purposes for my c28 is fishing up here in south central AK so I just wanted to look into something that could see a little better and deeper. I am not so worried about high speed use of the transducer if I went transom mount, thru hull is the clear choice if I can figure out a proper spot on the hull that doesn't get too much turbulence.
 
why not upgrade the unit at the location of the shower sump? that seems like a pretty good spot?
 
I don’t know if you still need info on this but

gallery2.php?g2_itemId=40254

Explains a good location to drill a hole through hull for an airmar H/W transducer for a 7612xsv nav unit. Works good. Did the work myself. Not rocket science though there are some tricks. PM if you would like more info.

Swims with Tuna
 
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