14
of the boat. Adjust the sensitivity and range controls until a second bottom
echo is seen on the display. (You will need to turn off both Automatic Sen-
sitivity 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 no-
ticeable decrease in sensitivity. The second bottom signal may disap-
pear 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 lo-
cation that shot through the hull the best and follow the instructions on
the following pages for a shoot-thru-hull mounting.
Shoot-thru-hull transducer locations for
high speed or trolling speed operation.
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.
2. Follow the instructions on the epoxy package and mix it thoroughly.
Do not mix it too fast, because it will cause bubbles to form in the ep-
oxy. Apply a small amount on the face of the transducer as shown
above, then spread a small amount onto the sanded area on the hull.
Transducer location
(trolling speed)
Transducer location
(high speed)
