I have a Lowrance on my Lund. Works pretty well up to 30+ MPH.
Transducer on transom.
I think it takes some fooling around with location, depth, angle.

del cecchi

"Bob La Londe" wrote in message
...
I think it takes just plane good luck to get a sounder that works well
at
speed. My Garmin does a better job than my Humminbirds, but it still
shows
a lot of noise at speed.

I also have an eagle, but its on the trolling motor of my old boat so
I
don't know how it works at speed.


--
Bob La Londe
Yuma, Az
http://www.YumaBassMan.com

"alex" wrote in message
...

For some years now I have a Zercom 165 fishfinder. At the time I
bought this particular unit because it was supposed to have a good
performance at high speeds. With the unit came a transom mount
transducer. So far I had poor results with it. It performs very wel
at
low speeds but as soon as a come on a plane the reading gets flaky
and
at a a speed of 25 knots or more I get no readout at all. I already
tried relocating the transducer, trying to find a spot with less
turbulence, but with little or no improvement.

Now I'm considering moving it to the inside of the boat. I suppose I
could mount it in the bildge, fixing it with some epoxy or
sillicone.
Is there anyone out there who had similar experience or who could
give
me some pointers in order to solve this problem ?

Many thanks in advance

Alex