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Dirty Transducer


mike fronczak

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The sonar portion of my Lowrance 350 is not working properly. The boat was left in the water by the previous owner and the transducer has a hard coating on it from that. How do I get that hard coating off with out damaging the unit. I tried a shotch brite pad, it didn't do much of anything. I need somtheing to loosen up the harded grime, will bottom cleaner/muratic acid melt the plastic?

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  • 1 month later...

You can use standard sandpaper without harm to the transducer. Anything more aggressive than 100 grit and you will be asking for problems. Solvents of any kind is a bad idea. you can also contact the manufacturer, however be prepaired for them to say dont try to clean it and just replace it, thats bogus. After its clean get a bottle of transducer bottom paint and follow the directions. The paint will fill in the imperfections and make the transducer last longer. Two coats will usually last the season.

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If the unit is a LMS 350A, it could be the transducer is on it's way out. I had the same problem, and had trouble getting new transducer. It now sits on my dash as a GPS with the fish finder part turned off.

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