Eagle 128 Installation And Operation Instructions Manual page 19

second bottom echo is seen on the display. (You will need to turn off both
automatic and ASP.) Don't touch the controls once they've been set.
Next, take the transducer out of the water and place it in the water in
the sump of the boat. Observe the sonar signal to see if there is a
noticeable decrease in sensitivity. The second bottom signal may
disappear and the bottom signal may decrease in intensity.
Move the transducer around to find the best location. If the sensitivity
control must be increased greatly to compensate, then the transducer
should be mounted on the outside of the hull. If not, then mark the
location that shot through the hull the best and follow the instructions
on the following pages for a shoot-thru-hull mounting.
Transducer location
(high speed)
Shoot-thru-hull Installation
1. Make sure the area is clean, dry and free of oil or grease, then sand
both the inside surface of the hull and the face of the transducer with
100 grit sandpaper. The surface of the hull must be flat so the entire
transducer face is in contact with the hull prior to bonding.
Shoot-thru-hull transducer locations for
high speed or trolling speed operation.
Transducer location
(trolling speed)
15