Quote Originally Posted by deltarat View Post
Rickie, I bought the transducer you recommended for my pontoon but when I get over about 18-20 mph my Helix 9 only shows 1.6' deep. When I slow down it will show the right depth.
Air is getting under the xducer causing the Sonar to lose bottom ...

You can try tilting the back of the xducer housing down a little and/or lowering the xducer housing ...

Rickie