[zeelaagee]

the angle and seating of the transducer is critical to performance. if it doesn't sit paralell to the waterline while the yak is in the water, it's going to give you funky or inadequate readings. air bubbles in your adheasive or not enough adheasive to create a full suround of the transducer will also cause malfunctions of readings.

these may not be your problem, but it's cheaper to troubleshoot these than to haul off and throw down on a new ff.