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Author Topic:   Fitting Garmin Transducer
Ferryman posted 09-11-2007 03:10 PM ET (US)   Profile for Ferryman   Send Email to Ferryman  
This probaly sounds like a silly question but I am a firm believer that the only silly one is the one you dont ask.

I am replacing the Humminnbird Matrix 27 on my 2004 -170 Montauk with a Garmin GPSmap unit.

I have installed the unit and now come to replace the humminnbird transducer with the Garmin one.

I have removed the unit and filled all the screw holes with gelcoat filler.

Above where the Humminnbird transducer was fitted are 2 Phillips screws are these original fittings and what is there purpose?

These screws were painted over when the antifouling was applied which I understand was done from new.

I would like to remove these and fill the holes so that I can mount the Garmin Transducer where the original Humminnbird one was mounted.

Chuck Tribolet posted 09-11-2007 06:33 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
I think those screws are from some prior transducer install.


Newtauk1 posted 09-16-2007 05:00 AM ET (US)     Profile for Newtauk1  Send Email to Newtauk1     
Consider mounting a piece of King Starboard or similar material to the transom using the existing screw holes. The new transducer can be mounted on the Starboard as well as any future transducers, thus eliminating additional holes in the transom. . There are a few discussions about this process on this site. I suggest using 3/4" to 1" Starboard material to allow for good purchase of mounting screws. I believe I used 1/2" and would use a thicker material next time. I have some photos of the mounting board if you would like to see.


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