Transducer

Bob&Jilly

R27-OB Portland OR Lynnsanity II
Joined
Mar 13, 2025
Messages
184
Location
Fargher Lake WA
Fluid Motion Model
R-27 (Outboard)
Hull Identification Number
FMLT2757*818
Vessel Name
Lynnsanity II
Any advice on reseating a leaking transducer?
Turns out it is the rubber o-ring at the bottom of the cup on my GT15M-1H transducer needs replacement. Needed to remove 6 small screws to see it . Now to find parts and how to replace the rubber o-ring a the bottom
The part number is need 010-12402-00 just don't know where I can find parts?
 
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Lots of posts on this. I sanded the area smooth as I could and used sikaflex.
 
I used a stupid amount of PC Marine Epoxy and made a donut with it then set the cup right into it. It's worked great for 2.5 years now, I get zero leakage now.
 
The boat I had 20 years ago had an in-hull transducer. I was forever working on it and finally replaced it with a thru-hull. When I purchased my R27 I had the dealer install a thru-hull that can see to very deep depths. I need the depth for finding the end of the continental shelf and water temps. Just couldn't go thru an in-hull again.
 
Turns out it is the rubber o-ring at the bottom of the cup on my GT15M-1H transducer needs replacement. Needed to remove 6 small screws to see it . Now to find parts and how to replace the rubber o-ring a the bottom
The part number is need 010-12402-00 just don't know where I can find it.
 
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I had the same problem. Using Ultrasound Gel instead of a liquid in the cup has solved the problem.
 
I had the same problem. Using Ultrasound Gel instead of a liquid in the cup has solved the problem.
This method is going to be my last resort before fixing mine with a hammer and installing a transom mounted unit. 5 years of this leaks and malfunctions, despite new gaskets…marine tech thought it was fixed (again.) But whenever we get into rough water we lose fluid in it. Recently went to Desolation and lost depth on the way across Georgia Strait and couldn’t get it back. Hammer is looking better and better.
 
I literally took 2 claw hammers to remove my P79 that someone had epoxied to the hull last week!
 
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