depth sounder replacement

texsun

Petty Officer 2nd Class
Joined
Jun 30, 2003
Messages
158
I made the decision to replace my 2000 yr old Lowrance 3500 with a new Faria Chesapeak SS. The SS is an updated depth gauge that comes with an InHull Transducer. My question is can I simply use a putty knife to remove the old Lowrance Transducer, sand, and clean the area ...and glue down/silicone the Faria Transducer in?? If the putty knife is not cool...please let me know the best approach.
Thanks in advance!
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,564
I made the decision to replace my 2000 yr old Lowrance 3500 with a new Faria Chesapeak SS. The SS is an updated depth gauge that comes with an InHull Transducer. My question is can I simply use a putty knife to remove the old Lowrance Transducer, sand, and clean the area ...and glue down/silicone the Faria Transducer in?? If the putty knife is not cool...please let me know the best approach.
Thanks in advance!
2000 yr old Lowrance 3500.....?? Was it used by Jesus ? Couldn't help having a little fun with your typo....
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,471
Would advise against the use of silicon in a transducer install.

Silicon is a sound deadening material. Epoxy propagates sound magnitudes better. Better sound transfer, better performance
 

cyclops222

Commander
Joined
Mar 21, 2024
Messages
2,373
Do you have any TESTED data results of the squeezed out Silicone. I do. No difference compared to a transom mounted Transducer. The small boat has 2 identical fishfinders. No difference. When both are on at the same time and different frequencies.
1 in the Aluminum hull. The other outside the transom.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,564
The silicone will fail, in my 60 yrs of boating, I have never saw a successful silicone use. Then when it fails, it is very difficult to get anything else to stick in that area. No silicone anywhere near my boat...
 

texsun

Petty Officer 2nd Class
Joined
Jun 30, 2003
Messages
158
Perfect way to do it
Got it done! Been down there for 20yrs....not 2000 :)) I have a 2005 Larson 208.
I looked at the original set up and thought 'should be pretty straight forward'...
This Faria IN HULL transducer has a plastic 'well' that it recommends using sillicon to stick the 'Well' to the hull...then you pour RV grade anti freeze (looks like a few ounces to keep air space out) in the 'well' ..and then you mount the transducer into the well.
And they advise I conducting a couple of test to determine the 'best location'
Has anyone has any experience with this?

Thanks
 
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