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Author Topic:   SONAR Transducer Replacement
sheikofthesea posted 03-02-2009 01:23 PM ET (US)   Profile for sheikofthesea   Send Email to sheikofthesea  
I have a GARMIN 498 combination GPS receiver, chart plotter and SONAR. The SONAR transducer is a mess with cracked hinge and barnacle encrustation. Is replacing the transducer as easy as finding an appropriate transducer and splicing the wires (with heat/shrink wrap of course)? Any recommendations about transducers and replacing it?


jimh posted 03-02-2009 01:53 PM ET (US)     Profile for jimh  Send Email to jimh     
If your SONAR transducer or sensor is damaged, I recommend you replace it with an identical replacement. If you get the identical replacement part you won't have to worry about electrical compatibility between the sensor and control head, and you won't have to make new mounting holes in the transom. And, assuming the old one worked well, you won't have to experiment with the sensor position to get optimum performance.

I would run the electrical cable for the replacement device anew, rather than splice it, unless the difficulty of running the new cable was so overwhelming as to be completely unworkable. However, even in that case, I'd look for a better way to run the new cable before I would splice it.

sheikofthesea posted 03-02-2009 05:54 PM ET (US)     Profile for sheikofthesea  Send Email to sheikofthesea     
Transducer it is. Thanks for boating (and etymological) advice.

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