Transducer Mount Position
Unobstructed View
: The jack plate gives the
transducer safe distance from the motor and
turbulence. The side imaging has a clear view
side-to-side.
Obstructed View
: The transducer is too close to
motor turbulence, and the side imaging view is
blocked by the motor. The view cannot extend
from side-to-side.
Side Imaging Transducer
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531390-1_C
1. Adjust the angle of the transducer body first, so it is parallel with the hull of the boat, and fully tighten
the two pivot screws using the supplied Allen wrench. Access to the pivot screws is provided by the
lower holes in the side of the mounting bracket.
2. Next, adjust the height of the assembly so the face of the transducer is 1/8” to 1/4” beneath the bottom
of the transom, and fully tighten the three mounting screws. In order to gain access to the mounting
screws, the transducer assembly must be pivoted up into the bracket as shown.
CAUTION!
Be careful not to alter the running angle, as some force is necessary to pivot the assembly.
3. If access to the top mounting hole is not possible due to the selected height of the transducer, fully
tighten the two lower screws. Remove the headed pivot pin and the transducer assembly, tighten the
top screw, and then reassemble.
4. Confirm that the pivot angle has not changed and that all mounting screws are fully tightened.
6.
Routing the Cable
The transducer cable has a low profile connector which must be routed to the point where the control head
is mounted. There are several ways to route the transducer cable to the area where the control head is
installed. The most common procedure routes the cable through the transom into the boat.
NOTE:
Your boat may have a pre-existing wiring channel or conduit that you can use for the transducer cable.
1. Unplug the other end of the transducer cable from the control head. Make sure that the cable is long
enough to accommodate the planned route by running the cable over the transom.
CAUTION!
Do not cut or shorten the transducer cable, and try not to damage the cable insulation. Route the cable as far
as possible from any VHF radio antenna cables or tachometer cables to reduce the possibility of interference. If the
cable is too short, extension cables are available to extend the transducer cable up to a total of 50'. For
assistance, contact the Customer Resource Center at
www.humminbird.com
or call
1-800-633-1468
for more
information.
NOTE:
The transducer can pivot up to 90 degrees in the bracket. Allow enough slack in the cable for this
movement. It is best to route the cable to the side of the transducer so the transducer will not damage the cable
during movement.
2a. If you are routing the cable over the transom of the boat, secure the cable by attaching the cable clamp
to the transom, drilling 9/64" diameter holes for #8 x 5/8" wood screw(s), go directly to procedure 7,
Connecting the Cable.
or...
2b. If you will be routing the cable through a hole in the transom, drill a 5/8" diameter hole above the
waterline. Route the cable through this hole, then fill the hole with marine-grade silicone sealant and
proceed to the next step immediately.
3. Place the escutcheon plate over the cable hole and use it as a guide to mark the two escutcheon plate
mounting holes. Remove the plate, drill two 9/64" diameter x 5/8" deep holes, and then fill both holes
with marine-grade silicone sealant. Place the escutcheon plate over the cable hole and attach with two
#8 x 5/8" wood screws.
Hand tighten only!
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Tightening the Mounting Screws
Tightening the Pivot Screw
Allen Wrench
Side Imaging Transducer
3
531390-1_C
3. Continue to hold the template on the transom of the boat, and use a pencil or punch to mark where to
drill the three mounting holes shown on the template.
4. Using a 5/32” bit, drill the three holes only to a depth of approximately 1”.
NOTE
: On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or
flaking the outer coating.
5. Use a marine-grade silicone sealant to fill the drilled holes, especially if the holes penetrated the
transom wall.
6. Align the metal mounting bracket with the mounting holes. The center slot of your mounting bracket
should be above the two outer slots. This bracket and all other hardware supplied is top quality stainless
steel for maximum strength and corrosion protection. Insert the three 1” flat head wood screws into the
drilled holes, but do not completely tighten.
3.
Assembling the Transducer
In this procedure you will attach the pivot to the transducer using the hardware provided.
1. Attach the pivot to the transducer body as shown in the illustration using the square nuts, toothed
washers, and two 1/4–20 x 5/8" machine screws. The square nuts will be prevented from rotating by the
pocket in the back of the pivot. The toothed washers must fit on the inside of the transducer ears,
between the pivot and the ears.
NOTE:
An Allen wrench is provided which fits all of the 1/4–20 screws, but do not fully tighten the screws at this
time.
4.
Attaching the Transducer to the Bracket
1. Slide the assembled transducer into the metal bracket from the bottom, aligning the large hole at the
top of the bracket with the hole in the pivot.
2. Insert the headed pin through the pivot holes in the bracket and pivot. The headed pin can be inserted
from either side of the bracket.
3. Place the nylon washer over the opposite end of the headed pin. Place the stainless washer over the
1/4–20 x 5/8” screw threads, then insert into the opposite end of the headed pin and finger tighten only.
The screw has a thread locking compound on the threads to prevent loosening, and should NOT be fully
tightened until all adjustments are made.
5.
Running Position Adjustment
The running position of the transducer is now completely adjustable. Subsequent adjustment may be
necessary to tweak the installation after high speed testing. The mounting bracket allows height and tilt
adjustment; the pivot screws allow angle adjustment.
NOTE:
Side imaging is best performed at boat speeds from 2 to 6 mph. If the boat is stationary, the same
information is displayed over and over. If the boat is moving too quickly, there will be gaps between the strips of
information. The best boat speed to use will depend on the side range selected. Slower speeds are good for
longer ranges, while faster speeds can be used at shorter ranges.
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Inserting the Square Nuts
Pivot
Toothed
Washer
Attaching the Pivot
Machine
Screw
Square
Nuts
Attaching the Transducer to the Bracket
Stainless Washer
(fits over
screw threads)
Headed Pin
Allen Wrench
Nylon Washer (fits
over headed pin)
Screw
Side Imaging Transducer
2
531390-1_C
• On boats with stepped hulls, it may be possible to mount the transducer on the step. Do not mount the
transducer on the transom behind a step to avoid popping the transducer out of the water at higher
speeds; the transducer must remain in the water for the control head to maintain the sonar signal.
• 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. Contact our Customer
Resource Center at either
1-800-633-1468
or by visiting our website at
www.humminbird.com
.
• If you plan to trailer your boat, do not mount the transducer too close to trailer bunks or rollers to avoid
moving or damaging the transducer during loading and unloading of the boat.
NOTE:
The hydrodynamic shape of your transducer allows it to point straight down without deadrise adjustment.
NOTE:
If you cannot find a transom mount location that will work for your high-speed application, a different
mounting technique or transducer type should be considered. Contact our Customer Resource Center at either
1-800-633-1468
or by visiting our website at
www.humminbird.com
.
2.
Mounting the Bracket
In this procedure you will mount the bracket, using the mounting template provided as a guide. This
template allows you to mark where the mounting holes should be drilled.
1. Cut out the transducer mounting template from this sheet. Match the mounting bracket screw slots to
the template screw slots.
2. Hold the template on the transom of the boat in the location you have selected. Align the template
vertically, matching the lower edge of the transom with the bottom corner of the template.
NOTE
: If your propeller moves clockwise as the boat moves forward (as you're facing the stern of the boat from
behind), mount the transducer on the starboard side, and use the bottom left corner of the template. If your
propeller moves counter-clockwise as the boat moves forward (as you're facing the stern of the boat from
behind), mount the transducer on the port side, and use the bottom bottom right corner of the template.
Side Imaging:
The Side Imaging transducer has some special requirements because of its side viewing
capabilities:
• The Side Imaging transducer must NOT have anything obstructing the ‘view’ of the side looking
beams; for example, nothing can be in the line of sight of these beams (not a hull, motor, or other
transducer, etc.)
NOTE:
You may need to tilt the motor up and out of the way when using the side looking beams.
• In order for the side beams to be displayed accurately, the transducer must be mounted so that it
is looking straight down in the water when the boat is in the water.
Level
Find a turbulence-free location at least 15" from the propeller(s) and not in line with trailer bunks or rollers.
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Deadrise
Deadrise Angle
Attaching the Bracket
Side Imaging Transducer
1
531390-1_C
Thank You
Thank you for choosing Humminbird®, America's #1 name in fishfinders. Humminbird® has built its reputation
by designing and manufacturing top-quality, thoroughly reliable marine equipment. Genuine Humminbird®
accessories offer the opportunity to upgrade and expand the capabilities of your Humminbird® product.
NOTE:
Your transducer may not look exactly like the transducer shown in the illustrations, but it will mount in
exactly the same way.
Your Humminbird® is designed for trouble-free use in even the harshest marine environment. In the unlikely
event that your Humminbird® does require repairs, we offer an exclusive Service Policy - free of charge
during the first year after purchase, and available at a reasonable rate after the one-year period. For
complete details, see the Warranty section included in this manual.
Contact our Customer Resource Center at either
1-800-633-1468
or visit our website at
www.humminbird.com
.
Installation Overview
Following are instructions for the installation of this accessory. Before you start the installation, we
encourage you to read these instructions carefully in order to get the full benefit from your Humminbird®
accessory.
If you find that any items are missing from your installation kit, call our Customer Resource Center at
1-800-633-1468
or visit our website at
www.humminbird.com
.
In addition to the hardware supplied with your transducer, you will need a powered hand drill and various
drill bits, various hand tools, including a ruler or measuring tape, level, pen or pencil, safety glasses and dust
mask, and marine-grade silicone sealant.
Installation
There are a number of ways to install a transducer on your boat. The transom mount installation provides
the least loss of signal since the transducer is mounted outside the boat hull. This installation also allows
adjustment of both running angle and depth after the transducer is mounted, which enables you to tune the
installation for best results. Also, 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.
1.
Locating the Transducer Mounting Position
Turbulence:
You must first determine the best location on the transom to install the transducer. It is very
important to locate the transducer in an area which is relatively free of turbulent water. Consider the
following to find the best location with the least amount of 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). Clockwise propellers create more turbulence on the port side. On outboard or
inboard/outboard boats, it is best to locate the transducer at least 15" to the side of the propeller(s).
• The best way to locate turbulence-free water is to view the transom while the boat is moving. This
method is recommended if maximum high-speed operation is a high priority. If this is not possible,
select a location on the transom where the hull forward of this location is smooth, flat and free of
protrusions or ribs.
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Transom Mounted Transducer
Stepped Hull
Rib
Step
Areas of Possible Turbulence
Rivets
Transom
Strakes
Hull
