What is this on the transom?

meistergeister

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Sep 20, 2022
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Hi,

I bought an used 2001 glastron sx175 hand it as what looks like a sensor on the bottom of the transom.
Does anyone know what this is? I don't have a fish finder or depth finder anywhere in the boat so I'm curious as to what this is.

Thanks!
 

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southkogs

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Welcome aboard:

The photo is small and really dark, so I'm not completely sure but I think you're referencing the pitot for the speedometer. Looks kinda' like a plastic "fin" with a tube running out of it?
 

jimmbo

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The only two things on the hull that are visible, are the Drain, and the Pitot Pickup
1664948305394.png

On my SX 195 the Pitot is mounted on the Starboard side, and a bit closer to the Centerline, the Depth Finder Sensor
SX195#7a.jpg
 

meistergeister

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Ah ok thank you so much! Had no idea what that was, now I know.
I'm trying to install a fish finder, but don't want to drill holes. Any suggestions?
Would love to install one.
 

froggy1150

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Wrap a piece of wood in fiberglass, scuff bonding area and glue with resin/glass. Paint or gelcoat.Then screw to wood. No holes in transom and if wood goes bad just grind off that little piece and replace
 

meistergeister

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Wrap a piece of wood in fiberglass, scuff bonding area and glue with resin/glass. Paint or gelcoat.Then screw to wood. No holes in transom and if wood goes bad just grind off that little piece and replace
Thanks! Where would you route the wire through to the front panel instruments? I'm not quite sure if my sx 175 has any holes in the transom to route it through.
 

jimmbo

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For the depth finder sensor are you using the same hole by chance?
They are mounted separately. A bit of Sealer and the holes are water tight. Where they are mounted on my Hull, there is no Wood to rot.
Actually these Glastrons are a very poorly made Boat. Mine ended up with a complete delamination of the Transom, and Glastron did "F" All, pretty much treating the "Lifetime Warranty" as it was simply Marketing Bull Fecal Matter. My dealer ate the cost of R&Ring the Engine, reattaching the Transom Board, adding extra Glass to strengthen the attachment.
 

JASinIL2006

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On my boat, I drilled a hole just above and to the starboard side of the spot where the trailer tie-down u-bolts are. I made sure the hole was above the water line when the boat is in water. I then snaked the wire along the back of the transom and up to the steering console.

The only tricky part is drilling a hole large enough for the plug on the end of the cable. It felt like I was drilling an enormous hole, which was a bit unnerving. Once the cable is run through the hole, just make sure you fill the hole with a really good UV-resistant sealant, like 3M 4000 UV. I also installed a clamshell over the hole where the cable entered the transom, and I made sure it was packed with 3m 4000, too.
 

southkogs

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I used a Stern Saver for mine. You can Google it, iBoats doesn't sell it. It's a small block that you adhere to the hull and then mount to that block. I decided I didn't want to put holes in my hull, so I used that.
 

dingbat

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I'm trying to install a fish finder, but don't want to drill holes. Any suggestions?
Unless your into hard core fishing, I would recommend a simple, glue in place, shoot thru installation which requires no holes at all.

If a hard core guy, go with the tilted element, solution from Airmar.
 

poconojoe

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I used a Stern Saver for mine. You can Google it, iBoats doesn't sell it. It's a small block that you adhere to the hull and then mount to that block. I decided I didn't want to put holes in my hull, so I used that.
Me too.
Stern Saver is great and it comes with everything you need for mounting it. No holes at all in your transom.
 

meistergeister

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Me too.
Stern Saver is great and it comes with everything you need for mounting it. No holes at all in your transom.
I'm leaning to the Stern Saver method.
So do you guys just drag the line inside the boat with the line exposed?
 

meistergeister

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Unless your into hard core fishing, I would recommend a simple, glue in place, shoot thru installation which requires no holes at all.

If a hard core guy, go with the tilted element, solution from Airmar.
Where in the hull would I put it on the sx 175? Do you know where a good location would be?
 

southkogs

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So do you guys just drag the line inside the boat with the line exposed?
Most people (I think) put a hole above the waterline and bring the cable in through that hole. I opted to just bring mine up and over the gunwale and run it behind one of the stern jump seats. In my case, it's hidden pretty well, doesn't get in the way and I didn't have to drill any holes in the hull (which I preferred).
 

dingbat

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Where in the hull would I put it on the sx 175? Do you know where a good location would be?
Not familiar with your particular boat but generally speaking, your looking at 12-18" fore of the transom, offset from the keel (Radius of prop)+3-4"
 

Lou C

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This has worked for me for a LONG time. Every few years re-bed the screws, or use the stern saver idea instead....
 

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jimmbo

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My sx195 at rest. The Speedo hose, and the Depth Finder wire were both routed through above the water line, just Port of the Outdrive, below the Tow Eye. Also mounted in the area is a Switch added so I could Operate the Trim Pump when behind the boat.
DSC_0015a.JPG
 

meistergeister

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My sx195 at rest. The Speedo hose, and the Depth Finder wire were both routed through above the water line, just Port of the Outdrive, below the Tow Eye. Also mounted in the area is a Switch added so I could Operate the Trim Pump when behind the boat.
View attachment 371398
Ah ok, so I suppose that was factory right? I doubt I can use that same Speedo hole to route both the hose and the transducer wire?
 

jimmbo

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No, the Depth Finder Sensor was off the boat that I traded in, but the Speedo tube was there from the factory. The Dealer, likely pulled the tube back, drilled out the Hole and used some sealer when both tube and wire were put thru.
 
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