Mine was epoxied down to the inside hull. It was never properly sealed at this base and always leaked coolant. I got sick and tired of taking my back seat out and stretching deep in the back to remove the transducer and refilling it with thus coolant. So i dried out whatever coolant was in the 1/2 sealed well and siliconed the inside and outside of the well. Let it cure, then added 20/50 motor oil. Hopefully no more back and forth now getting it to work. Right from brand new, it was a very poor installation by someone who didn't know how to properly install these. I did the oil because coolant evaporates and disappears quickly. So hopefully the oil lasts longer.
