Humminbird Transducer Installation

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Humminbird Transducer Installation - Page 1
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Humminbird Transducer Installation - Page 2
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High Speed Impact-Release Transom Mount Transducer
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531565-1_F
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Inserting the Pivot Arm Assembly Into the
Mounting Bracket
Mounting the Assembly to the Transom
Adjusting the Transducer
Mounting Position
Seam aligned
with boat hull
Leveling the Mounting
Assembly Horizontally
Level
Level
3. Put the pivot bolt through the assembly to hold it in position and loosely install the nut, but do NOT tighten the
nut at this time. Insert the pivot arm assembly into the mounting bracket as shown in the illustration. Do NOT
snap the assembly closed, as you will need to access the mounting bracket in the next step.
NOTE: If the pivot assembly is snapped closed over the mounting bracket, use a flat head screwdriver or similar
tool to gently pry the assembly away from the mounting bracket.
4. Align the mounting bracket transducer assembly with the drilled holes in the transom. With a 5/16" socket
driver, mount the assembly to the transomusing the two #10 - 1" long screws (provided). Hand tighten only!
NOTE: Make sure that the mounting screws are snug, but do not fully tighten the mounting screws at this time
to allow the transducer assembly to slide for adjustment purposes.
5. Snap the pivot arm down into place.
6. Adjust the initial angle of the transducerfrom back to frontby rotating the transducer until the side seam on the
transducer is almost parallel with the bottom of the boat, one click at a time in either direction.
7. 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 4-5 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.
8. Continue to adjust until the bracket is also level from port to starboard (horizontally level as you look at the
transducer from behind the boat).
9. Mark the correct position on the transom by tracing the silhouette of the transducer mounting bracket with
a pencil or marker.
10. Tighten the pivot bolt, using the pivot screw and nut to lock the assembly. Hand tighten only!
11. 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.
Adjusting the Initial Transducer Angle
Leading edge
One click too low
Trailing edge
Correctly aligned
(transducer side seam is
aligned with boat bottom)
One click too high
High Speed Impact-Release Transom Mount Transducer
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3.Assembling the Transducer and Initial Mounting
In this procedure, you will assemble the transducer using the hardware provided, then mount it and make
a
djustments to its position without locking it in place.
NOTE: You will initially assemble the transducer and the pivot arm by matching the two ratchets to a numbered
position on the transducer knuckle. Further adjustments may be necessary.
1a. If you already know your transom angle, refer to the chart below for the initial position to use to set the
ratchets. If your transom is angled at 14 degrees (a common transom angle for many boats) use position 1
for the ratchets. In either case, go to step 2.
or...
1b. If you do not know your transom angle, measure it using a plumb line (weighted nylon string or monofilament
line) exactly 12 inches long. Hold the top of the plumb line against the top of the transom with your finger,
and wait until the line hangs straight down. Using a ruler, measure the distance from the bottom of the
plumb line to the back of the transom, then use the chart. Refer to the illustration for more information.
NOTE: It is important to take your measurement in the location shown in the Measuring the Transom Angle
illustration, from exactly 12 inches down from the top of the transom.
2. Place the two ratchets, one on either side of the transducer knuckle, so that the beads on each ratchet line
up with the desired position number on the knuckle. If you are setting the ratchets at position 1, the beads
on each ratchet will line up with the rib on the transducer knuckle to form one continuous line on the
assembly.
NOTE: The ratchets are keyed; make sure that the square teeth on each ratchet face the square teeth on the
transducer knuckle, and the triangular teeth face outward.
Hold the ratchets on the transducer knuckle with one hand and fit the pivot arm over them until it snaps into
place with the other hand. Refer to the illustration.
Ratchets Placed in Position 2 Fitting theMounting Bracket Over theRatchet
Bead
Ratchet
Rib
Transducer Knuckle Positions
Ratchets Placed in Position 1
Rib at
position 1
Beads
Knuckle
Ratchet
-2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Transom Angle (°)
Bead Alignment
Number
142531425
25 26 27
3
28 29 30
1
Measured Distance (x)
1.1cm
1/2“
0.0 cm
0“
2.5 cm
1“
4.3 cm
1 5/8“
5.9 cm
2 3/8“
7.6 cm
3“
9.3cm
3 5/8“
11.1cm
4 3/8“
12.9cm
5“
14.9cm
5 7/8“
16.9cm
6 5/8“
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
12”
Transom
Angle in
degrees (°)
Measured
Distance (X)
Measuring the Transom Angle
Plumb line
Weight
Inserting the Pivot Bolt
High Speed Impact-Release Transom Mount Transducer
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531565-1_F
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.
If high speed operation is critical, you may want to consider using an Inside the Hull Transducer instead of
this Transom Mount transducer.
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, find an Inside
The Hull Transducer by contacting our Customer Resource Center at either 1-800-633-1468 or by visiting our
website at www.humminbird.com.
2.Preparing the Mounting Location
In this procedure, you will determine the mounting location and drill two mounting holes, using the transducer
mounting bracket as a guide.
1. Make sure that the boat is level on the trailer, both from port to starboard and from bow to stern, by placing
your level on the deck of the boat, first in one direction, then in the other.
2. Hold the mounting bracket against the transom of the boat in the location you have selected. Align the
bracket horizontally, using the level; make sure that the lower corner of the bracket does not protrude past
the bottom of the hull, and there is at least 1/4" clearance between the bottom of the bracket and the bottom
of the transom for fiberglass boats, and 1/8" clearance for aluminum boats.
NOTE: If you have a flat-bottomed aluminum boat, some additional adjustment may be needed to accommodate
the rivets on the bottom of the boat (i.e. the gap may need to be a little smaller than 1/8"). This will help you to
avoid excessive turbulence at high speeds.
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 align the bottom right corner of the mounting bracket
with the bottom of the boat. If your propeller moves counterclockwise as the boat moves forward (as you're
facing the stern of the boat from behind), mount the transducer on the port side, and align the bottom left corner
of the mounting bracket with the bottom of the boat.
3. Continue to hold the bracket on the transom of the boat, and use a pencil or marker to mark where to drill
the two mounting holes. Mark the drill holes near the top of each slot, making sure that your mark is centered
in the slot, as shown in the illustration.
4. Make sure that the drill bit is perpendicular to the actual surface of the transom, NOT parallel to the ground,
before you drill. Using a 5/32” bit, drill the two 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.
NOTE: The third hole should not be drilled until the angle and height of the transducer is finalized, which
you will not do until a later procedure.
1
5”
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.
1/8” for aluminum
1/4” for fiberglass
Boat Hull Types Require
Different Mounting Positions
Positioning the Mounting Bracket
Level
Using the Mounting Bracket to
Mark the Initial Drill Holes
Mark Initial Drill Holes
Level
High Speed Impact-Release Transom Mount Transducer
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531565-1_F
Thank You
Thank you for choosing Humminbird®, America's #1 name in fishfinders. Humminbird® has built its reputation by
designing and manufactur ing top-qu ality, tho roughly reliable marine equ ipment. Ge nuine Humm inbird®
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 1-800-633-1468or 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 instructionscarefully in order to get the fullbenefit from your Humminbird® accessory.
If you fi nd tha t any ite ms are mi ssi ng fro m your in stallation kit, call our Customer Resource Cen ter 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, inclu ding a ruler or straightedge, a level , a 12" plumb line (wei ghted string or
monofilament line), marker 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 that 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.
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,such as an Inside the Hull Transducer.
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.
© 2008 Humminbird®, Eufaula AL, USA.
All rights reserved.
Transom Mounted Transducer
Areas of Possible Turbulence
Rivets Transom
Strakes Hull
Stepped Hull
Rib
Step
Deadrise
Deadrise Angle