Humminbird ONIX8 Installation Manual page 14

9. Adjust the transducer assembly vertically, until the seam on the leading edge of the
transducer (the edge closest to the transom of the boat) is level and just slightly
below the hull.
NOTE: The transducer has a natural downward slant of 4 to 5 degrees from leading edge
(closest to the boat transom) to trailing edge (farthest away from the boat). Looking at
the back of the transducer, the seam should be slightly below the bottom of the hull.
10. Continue to adjust the transducer assembly until the bracket is also level from port to
starboard (horizontally level as you look at the transducer from behind the boat).
11. Mark the correct position on the transom by tracing the silhouette of the transducer
mounting bracket with a pencil or marker.
12. Tighten the pivot bolt, using the pivot screw and nut to lock the assembly. Hand-tighten
only!
CAUTION! Do not use a high speed driver on this combination of fasteners. Hand-tighten
only.
13. Snap open the assembly and hand-tighten the two mounting screws, then snap the
assembly closed.
NOTE: You will drill the third mounting hole and finalize the installation after you route
the cable and test and finish the installation in the following procedures.
Proceed to the section Route the Cables.
D B PLUS I
UAL EAM
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.
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: The integral temperature probe will not work with in-hull mounting, so you may want to consider purchasing a
Temperature/Speed accessory, a Temp Sensor, or obtaining a different transducer.
NOTE: In-hull mounting requires an installed and operational control head.
Install the DualBeam PLUS Transducer
H I
NSIDE THE ULL NSTALLATION
10
Adjusting the Transducer
Mounting Position
seam aligned
with boat hull
Leveling the Mounting
Assembly Horizontally
Level