Depending on the year of your eXtreme, you may or may not have the white layer
inside the hull. Transducers won't work well shooting through that, as it has air molecules in the
material. Be very careful if you have to cut out the additional layer, as you could very
easily cut through your hull.
I mount my transducer using a carriage bolt and turnbuckle through the scupper hole in the foot well.
This is not my favorite way (it tends to catch kelp) and would like to change it, but I'm
planning on getting a new eXtreme in the next couple of weeks, so I'm living with it.
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