If you have an large si transducer...be it an HB unit or any other.....they are known to throw up quite a rooster tail depending on the mounting location. I was very fortunate that the company that made my boat installed a transducer mounting plate on the boat when it was built. They mounted the plate where there would be no turbulent water flow over the transducer. The transducer was mounted and was dead perfect first time out. I had read a lot about mounting the HB si transducer so as not to have any problems. I passed on that info to the guy that rigged my electronics and it worked from day one. Hope you get it tuned in.
Regards
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