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WARNING:
Do not remove any material from your inner hull unless
you know the hull's composition. Careless grinding or
cutting on your hull can result in damage that could sink
your boat. Contact your boat dealer or manufacturer to
confirm your hull specifications.
To choose the proper location for thru-hull mounting, anchor the boat in
60 feet of water. Add a little water to the sump of the boat. Plug the
transducer into the sonar unit, turn it on, then hold the transducer over
the side of the boat. Adjust the sensitivity and range controls until a sec-
ond 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 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
Transducer location
(trolling speed)
Transducer location
(high speed)