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post #7 of Old 06-25-2014
Join Date: May 2010
Location: Arlington VA
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Re: Raymarine speedo question

I don't see how copper paint could possibly make an appreciable difference for the magnetic signal to the Hall effect sensor. I would paint away, but make sure that you are not putting it on too thick. Rubbing on the sides is not the only issue. I would think if the paint smooths out the shape of the paddlewheel, it might have less drag in the water and need calibration.
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