Inside The Hull Transducer Installation - Humminbird Matrix 10 Install Manual

INSIDE THE HULL TRANSDUCER INSTALLATION

In-hull mounting generally produces good results in single thickness fiberglass-hulled boats.
Humminbird cannot guarantee depth performance when transmitting and receiving through the hull of
the boat, since some signal loss occurs. The amount of loss depends on hull construction and thickness,
as well as the installation position and process.
NOTE: The integral temperature probe will not work with in-hull mounting, so you may either want to
consider purchasing a Temperature/Speed accessory, a Temp Sensor, or obtaining a different transducer.
Humminbird offers a transducer exchange program to swap the NEW and UNASSEMBLED transducer,
accompanied by mounting hardware, for one without an integral temperature probe. Call the
Humminbird Customer Resource Center (334-687-0503) for details, or visit www.humminbird.com for
more information.
This installation requires slow-cure two-part epoxy. Do not use silicone or any other soft adhesive to
install the transducer, as this material reduces the sensitivity of the unit. Do not use five-minute epoxy,
as it has a tendency to cure before all the air bubbles can be purged, thus reducing signal strength.
NOTE: In-hull mounting requires an installed and operational control head.
1.
Determine the Transducer Mounting Location
Decide where to install the transducer on the inside of the hull. Consider the following to find the best
location:
• Observe the outside of the boat hull to find the areas that are mostly free from turbulent water.
Avoid ribs, strakes and other protrusions, as these create turbulence (Figure 14).
• As a general rule, the faster the boat can travel, the further aft and closer to the centerline of the hull the
transducer has to be located in order to remain in contact with the water at high speeds (Figure 27).
2.
Trial Installation
You will not be able to adjust the mounting after an inside the hull transducer is installed. It is best,
therefore, to perform a trial installation first that includes running the boat at various speeds, in order to
determine the best mounting area before permanently mounting the transducer.
1. Plug the transducer into the control head, then power up the control head. When the control head
detects a functioning transducer, it will automatically enter Normal operating mode.
2. View the sonar signal at its best by holding the transducer over the side, immersed in the water,
so that it is pointing straight down over a known flat bottom. Use the display to benchmark
against the sonar signal that will be detected once the transducer is placed in the hull.
3. Place the transducer body face down at the identified mounting location inside the hull, with the
pointed end towards the bow (Figure 26).
4. Fill the hull with enough water to submerge the transducer body. Use a sand-filled bag or other
heavy object to hold the transducer in position. The transducer cannot transmit through air, and
the water purges any air from between the transducer and the hull, and fills any voids in the coarse
fiberglass surface.
Transducer Mounted Inside the Hull
Figure 26
Preferred Mounting Area
Figure 27