Humminbird ONIX8 Installation Manual page 9

Installing the Transom Mount Transducer
I O
NSTALLATION VERVIEW
The transom mount installation provides the following:
• Least loss of signal since the transducer is mounted outside the hull.
• Allows adjustment of both running angle and depth after the transducer is mounted, which enables you to tune the installation
for best results.
• The mounting hardware is designed to pivot the transducer body out of the way should the boat strike debris in the water, or when
trailering.
T T
RANSOM RANSDUCER
You must first determine the best location on the transom to install the DualBeam PLUS or Side Imaging transducer. Review the
following information to help you identify the best mounting location.
Turbulence
It is very important to locate the transducer in an area that is relatively free of turbulent
water. Consider the following to find the best location with the least amount of turbulence:
Turbulence: As the boat moves through the water, turbulence is generated by the weight of
the boat and the thrust of the propeller(s) - either clockwise or counter-
clockwise. This turbulent water is normally confined to areas immediately aft of
ribs, strakes, or rows of rivets on the bottom of the boat, and in the immediate
area of the propeller(s).
Propellers: Clockwise propellers create more turbulence on the port side. On outboard or
inboard/outboard boats, it may be best to locate the transducer at least 15" to
the side of the propeller(s). The Side Imaging transducer has additional
mounting requirements. See the section Side Imaging Transducer Mounting
Requirements.
If the transom is behind the propeller(s), it may be impossible to find an area
clear from turbulence, and a different mounting technique or transducer type
should be considered.
Find a turbulence-free location that is not in line with trailer bunks or rollers.
T T
RANSOM RANSDUCER
Your ONIX control head includes transom mounting hardware for your DualBeam PLUS or
Side Imaging transducer. Review the mounting requirements in this section, and then proceed
to the section for your transducer type to begin the installation.
NOTE: Due to the wide variety of hulls, only general instructions are presented in this
installation guide. Each boat hull represents a unique set of requirements that should be
evaluated prior to installation. It is important to read the instructions completely and
understand the mounting guidelines before beginning installation.
M R
OUNTING EQUIREMENTS
I
NSTALLATION
5
Areas of Possible Turbulence
rivets
strakes
hull
Stepped Hull
step
Transom Transducer Installation
transom
rib