nwtrevrider

Looking for some help with a hawk eye D10 depth finder; I tried various places in the hull and wasn't happy with the readings so I transom mounted the transducer and now all I am getting is '---' on the display, even when just floating in the water. I mounted the transducer to the left of the speedo and pretty sure I followed the instructions to the letter however still no luck. Any of you have any experience with this model? Suggestions??

Unrelated, hydro turf came in last night so I know what I am doing Friday night!