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Transom mounted transducer on 2023 222 FSH Sport

Cajun Bill

Well-Known Member
Messages
8
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2
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Location
Morgan City, LA
Boat Make
Yamaha
Year
2023
Boat Model
FSH Sport
Boat Length
22
Although the boat comes with a thru hull transducer, it only gives depth and temperature. I wanted a transom mounted transducer, integrated with the Garmin MFD, for clear view, side view and seeing the bottom contour. With twin engines, the preferred location is in the center. But, it's hard to find room on the hull. In viewing the underside of the hull, the length of it looked clean just to the side of the centerline/keel. So, I decided to put it there. Plus, because I may later want to add trim tabs or the Seakeeper ride, it would keep the best areas of real estate free. I bought a short piece of 1/4 marine grade aluminum angle, cut it and drilled it to make a bracket. It's fixed to the boat with 2 bolts going into the ride plate. (If it didn't work out, I don't have any holes in the hull. There's no room for a stick on pad there). I used the template that came with the Garmin GT54UHD-TM transducer to get the mount and the holes in the bracket right. The cable's plug was just a little too big to fit into the drain outlet from the wet storage area. So, I replaced the thru hull drain fitting with a 1" one from West Marine and transitioned the hose back down to 3/4" at a tee above the water line. Here are a few pics. I'm pleased to report that I can run wide open in rough/choppy conditions, have a clear view of the bottom and receive continuous depth readings.
 

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Cajun Bill

Well-Known Member
Messages
8
Reaction score
2
Points
52
Location
Morgan City, LA
Boat Make
Yamaha
Year
2023
Boat Model
FSH Sport
Boat Length
22
We can't mount it like that on the 2023 222 FSH because the hull doesn't have the step that yours has.
 

AlpharettaRK

Jet Boat Lover
Messages
130
Reaction score
156
Points
72
Boat Make
Yamaha
Year
2023
Boat Model
FSH Sport
Boat Length
22
So @Cajun Bill the “ articulating keel“ doesn’t interfere with starboard side scan? I do have trim tabs already and side scan is near future project. TIA
 

Cajun Bill

Well-Known Member
Messages
8
Reaction score
2
Points
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Location
Morgan City, LA
Boat Make
Yamaha
Year
2023
Boat Model
FSH Sport
Boat Length
22
Great question. I've only used side scan a few times since making the installation. I was most concerned about seeing the bottom while running. I scrolled thru side scan briefly. Let me put it in the water this week and get some pics of the display with various settings.
 

Cajun Bill

Well-Known Member
Messages
8
Reaction score
2
Points
52
Location
Morgan City, LA
Boat Make
Yamaha
Year
2023
Boat Model
FSH Sport
Boat Length
22
Here are some high-resolution images. In the open lake, you can see that the sidevu returns on the starboard side are impacted. When idling by a structure and making passes in each direction, it's evident that the articulating keel does block the signal and leave a blind spot on the starboard side. For some, it may be preferable to have the transducer mounted on the starboard side of the keel. But, the factory thru hull airmar is on that side and I didn't know if there would be any interference. For my purposes, I intend to leave it as is. Sidevu 3 lake.jpgSidevu 2 lake.jpgSidevu 1 lake.jpg
 
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