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TRANSOM TRANSDUCER Installation Guide
The transom mount installation allows adjustment of both running angle and depth after the
transducer is mounted, which enables you to tune the installation for best results.
N
OTE: 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. For detailed information about installing transducers on different hull
types, download the Transducer Installation Resource Guide
NOTE: Your transducer may not look exactly like the transducer shown in the illustrations, but it
will mount in exactly the same way.
Installation Preparation
Install the control head before you start the transducer installation. See the control head
installation guide.
Review your boat manufacturer’s owner’s manual for recommended transducer installation
locations and cable routing methods. You will also need your transom angle.
Read and understand your boat’s warranty before starting this installation.
Read the instructions in this guide completely and understand the mounting guidelines
before beginning this installation.
Confirm your boat is level for the installation.
Consider your speed requirements.
Traveling over 65 mph with the transducer in the water is not recommended with the XNT 9
SI 180 T, XNT 9 DB 74 T, XNT 14 74 T, and XNT 9 MSI 150 T transducers, as damage may occur.
If speed above 65 mph is critical, see the FAQ (Frequently Asked Questions) section of our Web
site at humminbird.com.
Supplies:
In addition to the supplied hardware, you will need a powered hand drill and various
drill bits, various hand tools, including a ruler or straightedge, a level, a socket driver, marker
or pencil, safety glasses and dust mask, marine-grade silicone sealant, dielectric grease
(optional), and a 12" plumb line (weighted string or monofilament line [optional]). You may
also need extension cables and hardware for routing the cable to the control head.
Installation Overview
New Installation: Proceed to the section Turbulence-Free Mounting Guidelines.
Previously-installed Transducer: If you have a previously-installed XNT transducer on the transom,
the bracket in this installation kit can be installed in the same location using the following
instructions:
1. Line up the metal bracket with the previously-used mounting holes to confirm that the two
slot holes match the previous installation. Fill any unused holes with marine-grade silicone
sealant.
2. Confirm the boat is level (from port to starboard and from bow to stern).
3. Proceed to section 2. Assemble the Transducer and Initial Mounting.
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