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Old 03-15-2014, 12:00 PM   #1
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Bottom Paint on Depth Xducer

Boat came with a Hummingbird fish finder. It never worked in shallow water but anything over about 20' it seemed to be fine. Now it doesn't work at all and all I can think of that has changed, is we had a bottom job done. Would painting the xducer affect it's operation?

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Old 03-15-2014, 01:15 PM   #2
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Every transducer we have had on all our boats says not to paint the transducer face with normal bottom paint,
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Old 03-15-2014, 02:08 PM   #3
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Quote:
Originally Posted by rochepoint View Post
Every transducer we have had on all our boats says not to paint the transducer face with normal bottom paint,
That is my understanding as well, although I wonder how significant the signal deterioration is, as many of these same transducers can also be mounted to shoot through the hull, which presumably has bottom paint.

Unless there is some kind of reaction between the paint and transducer?
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Old 03-15-2014, 02:27 PM   #4
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From the Airmar website:

"Use water based anti-fouling paint only. Never use ketone-based paint, since ketones can attack many plastics possibly damaging the transducer."

So it sounds like the paint coating has little effect but the harsh solvents in some paints could destroy the transducer.
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Old 03-15-2014, 03:02 PM   #5
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I used transducer paint for a few haulouts. Then got lazy and painted over it with regular bottom paint. That was about five years ago and thing works fine. It's an Airmar angle unit.

One yard kept a can of transducer paint for folks to use.

Maybe used water based inflatable dink paint- if it can't hurt a dink, xducer should be fine too.
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Old 03-15-2014, 03:08 PM   #6
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Next time I have the bottom cleaned I'll see if the diver can scrape off the paint.

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Old 03-15-2014, 03:20 PM   #7
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paint is not the problem unless there's an air bubble in it and not likely.
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Old 03-15-2014, 03:47 PM   #8
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I been using regular bottom paint (ablative and modified epoxy) on our transducers for 25+ years. I've never had any physical damage that I can see or signal loss.
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Old 03-15-2014, 04:09 PM   #9
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I use bottom paint on my Humminbird x ducer and it works fine. I thin it out and apply very lightly so it's really thin.
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