Try Moving the back of the xducer down about 1/4 inch. This will not affect your readings and has worked for me.
I have Garmin Echo map plus 73sv. I am loosing DV speed signal at about 25mph. I have an aluminum boat and the transducer is set about 3/8in below hull and is squared with a level. Do I need to move it up or down or is the best it will do. I read some where to have it 1/8in above the bottom of hull. I am happy with my SV imaging. Thanks for help.
Try Moving the back of the xducer down about 1/4 inch. This will not affect your readings and has worked for me.
Agree with Bill. That’s how I got my SI ducer on a 998 to give a reading most of the time.
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Charlie Weaver USN/ENC 1965-1979