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<blockquote data-quote="FuzzyGrub" data-source="post: 498644" data-attributes="member: 3438">I have never mounted two transducers on the transom, but it does sound like you are getting interferance between the SI and DI.&nbsp;&nbsp; I believe they use the same frequency range.&nbsp; Some of HB units can change the SI freq, so that might be a test you can do.&nbsp; Otherwise I think your tape and test approach is good.&nbsp; On the centerline, might cause some ventilation with your motor, at speed.&nbsp; I would try the port side.&nbsp; Can your DI unit do 2D?&nbsp; I have used an older DI unit with the unirversal sonor in the MG trolling motor.&nbsp; &nbsp; DI and SI is more for slower speeds, so you could optimize the 2D transducer for the best high speed you could get.&nbsp; The DI units were generally less power than the 2D ones, though.How about using it as a dedicated GPS graph screen?&nbsp; If it has a NMEA2K port, and motor does, can display more data than the standard gauge sets.&nbsp; Just my thoughts.</blockquote>

[QUOTE="FuzzyGrub, post: 498644, member: 3438"] I have never mounted two transducers on the transom, but it does sound like you are getting interferance between the SI and DI. I believe they use the same frequency range. Some of HB units can change the SI freq, so that might be a test you can do. Otherwise I think your tape and test approach is good. On the centerline, might cause some ventilation with your motor, at speed. I would try the port side. Can your DI unit do 2D? I have used an older DI unit with the unirversal sonor in the MG trolling motor. DI and SI is more for slower speeds, so you could optimize the 2D transducer for the best high speed you could get. The DI units were generally less power than the 2D ones, though. How about using it as a dedicated GPS graph screen? If it has a NMEA2K port, and motor does, can display more data than the standard gauge sets. Just my thoughts. [/QUOTE]

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