The Humminbird XAP 9 20 Angled Puck Transducer is designed to mount to the inside of most fiberglass hulls with a deadrise greater than 15 degrees, and transmit the sonar signal downward through the hull itself. Your boat's hull must be of single-layer, fiberglass construction and be free of trapped air or voids in order for a puck transducer to operate correctly, so cored fiberglass, metal and wood will not work. This unit is meant to be glued to your inner hull with a slow-cure epoxy, which is included, and connects to your compatible Humminbird sonar or fish finder system via the included 15-foot cable. The Humminbird XAP 9 20 is a single/dual puck transducer and is designed to be used with Humminbird's; Piranha 1, Piranha 2, Piranha 3, Piranha 4, Piranha 5, PiranhaMax 10, PiranhaMax 15, PiranhaMax 20, Matrix 15, Matrix 17, Matrix 25, Matrix 27, Matrix 55, Matrix 65, Matrix 67, Matrix 97, FF515, FF535, and FF565. This item is backed by Humminbird's one-year limited warranty.
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I brought this to replaced one that was broken off from rear of boat. This was done by previous owner that didn't want to replaced it. Being in shallow lake, I didn't want to have same problem. So I've decide to try out this product which allow me to glue them inside the hull under the engine. Hoping that it work... it work very successful without any issue on my first trip out with this products. Got everything you need to install, but you still need to buy or already have gauge, this is just for transducer for gauge. Now I don't have to worry about damage from outside of boat, no external wiring and drilling. Out of sight and mind.
Dues not work just like all Hummingbird junk. I bought this because the stock transducer does not work well. This one is even worse. Customer service has no clue how to mount either transducer. My 999ci unit is an expensive piece of junk. I have nothing good to say about Humminbird.
I placed this onto a zip lock bag filled with water inside the area of the hull I wanted to mount it. Once I confirmed it worked, I used thickened slow cure epoxy to mount it. I built up a small ridge around the low side with painters tape to help contain any epoxy oozing out. It works just fine.
Product worked as described for fiberglass bottom boat. Doesn't seem to be as sensitive as a transom mounted solution, but if you don't want to drill holes in your boat, it works great! I would buy it again if I purchase another boat.
