Whether transom mount or shoot-through, the location of the transducer is ABSOLUTELY THE KEY. CLEAN WATER.. not air bubbles.
Go as near keel as you can. Stay away from the chines. Planing boats are designed to get lift ( AND AIR) for less hydrodynamic drag and more speed. You ever see the chopped chines? That is for one purpose to get air under the hull, BUT..... You want to keep un-aerated water under under and near the transducer. The ideal location is well aft and as near the keel as possible.
My 14 foot tin crab warrior Heat Seeker with an older Lowrance FF shows me clean bottom at its max speed of about 25 mph over the bottom.
That's my two cents,
Quote:
Originally Posted by Gerry Zagorski
I’d take his recommendation since Airmar makes most of the ducers that come standard with most machines and they know what they’re doing. A few things that may or may not be important to you, if your machine is capable, a ducer that reads water temps not sure if the one he recommended does. I see your going for the transom mount which is fine. They likely sell a tilted element that’s a through hull and the nice thing about the tilted element is they don’t require faring blocks to sit level and don’t stick out from the hull. You do however need to know exactly where to install it on your particular hull. If you guess wrong you kinda screwed since you might not be able to read bottom at planing speeds.
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