Join Date: Dec 2008
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Electrical interference with depth finder
I have an old 25 year old Impulse digital depth finder at the helm with the transducer installed in a thru hull fitting. It's worked fine for the past 24 years, but recently it gives bad readings whenever the engine is running. Under sail it still does fine so there must be some degradation in the transducer cable as it passes through the engine space. Is there a simple and easy fix such as wrapping the cable with some shielding as it goes through the space? Replaceing that cable would not be easy since it's difficult to access on both ends plus not sure if even possibe since the transducer end in potted in epoxy.