Lowrance Traditional Manuel utilisateur
Traditional Sonar and DSI Sonar Installation
This document covers the installation of the transducer and display unit installation, which includes con-
necting the unit to power and installing the unit on the bracket mount.
The rst section of the document covers the installation of a traditional sonar skimmer transducer. DSI
sonar installation is covered in the last section of the manual.
Make sure you read all the installation instructions before drilling holes in your vessel!
Traditional Sonar Transducer Installation
One piece bracket (Recommended Tools and Supplies — not included)
Drill Marine grade above-or-below waterline sealant
1” (25mm) or 5/8” (15mm) drill bit Marine grade epoxy (Shoot-thru-hull install only)
#29 (0.136”) (3mm) drill bit Zip ties (trolling motor mount)
Phillips (Slotted-head) screwdriver TMB-S bracket kit (Skimmer trolling motor mount)
NOTE: This majority of this installation does not apply to the GPS only units since they do
not have a transducer. Turn to pages 8-11 for information on mounting the display unit and
connecting the unit to power.
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A. Select a transducer location
To function properly the Skimmer transducer must
be in the water at all times and in a location that has
a smooth ow of water when the boat is moving.
If the transducer is not placed in a smooth ow
of water, interference caused by bubbles and
turbulence may show on-screen as random lines or
dots. The unit also could lose bottom signal when
the boat is on plane.
B. Aligning Ratchets on bracket
You will use the ratchets to ensure the trans-
ducer is installed parallel to the ground.
1. Insert the ratchets in the bracket with the
letter “A” aligned with the dot stamped
on the outside of the transducer bracket.
2. Slide the transducer into the bracket
and temporarily slide the bolt through
the transducer bracket.
Good locations
Poor locations
Ratchet Bracket
NOTE: Mount the transducer at least
one foot away from the engine lower
unit.
Too high
Poor angle
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3. Hold the transducer
assembly against
the transom. Look at
the transducer from
the side. If it is par-
allel to the ground,
then the “A” position
is correct.
4. If the transducer can not be adjusted
so its face is parallel to the ground, re-
move the transducer and ratchets from
the bracket. Reinsert the ratchets into
the bracket, this time with the letter “B”
aligned with the dot stamped in the
bracket. Reassemble the transducer
and bracket and place it against the
transom.
5. Check to see if the transducer will ad-
just so its face is parallel with the ground.
Repeat this process until the transducer can
be adjusted so its face is parallel with the
ground.
C. Assembling the bracket
After determining the correct position for the
ratchets, loosely assemble the transducer and
bracket assembly.
Lock nut
Metal washer
Rubber washers
Ratchets
Metal washer
Bolt
Align dot and
letter "A".
dot
A
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D. Attaching Transducer to Transom
1. Adjust the transducer so its face is
parallel with the ground and its center
line is even with the bottom of the boat
hull.
2. Hold the transducer and bracket
assembly against the transom. When the
transducer and bracket are properly aligned
mark its position on the hull.
3. Drillthemountingholesforthetransducer
bracket. Use a #29 bit (for the #10 screws).
Routing cables
When mounting your transducer, make sure to
leave some slack in the cable near the transducer. If
you need to drill a hole in the transom to pass the
connector through, the hole size will depend on
the connector on the end of the transducer’s cable.
E. Make test run to determine results
After the transducer is installed make a test run to
ensure the transducer is installed properly. Use the
Transducer face must be
parallel with the ground
Transom
Bottom of
hull
Run the cable over
the bolt and through
the bracket.
Do not over tighten the lock nut;
otherwise transducer may not kick-
up if it strikes an object.
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slots in the transducer mounting bracket to loosen
the screws and slide the transducer up or down, if
adjustments are necessary.
Shoot-thru-hull Skimmer and
Pod transducer installation
Before attempting any installation on boats with
otation material sandwiched within the hull, con-
sult the boat manufacturer. In a shoot-thru-hull in-
stallation the transducer is epoxied to the inside of
the boat hull.
A transducer can not shoot through wood or metal
hulls. Wood and metal hulls require either a tran-
som mount or thru-hull installation. For shoot-
thru-hull applications many boat hulls have a at
keel pad that oers a good transducer mounting
surface.
Make sure the Skimmer transducer is oriented so
the nose of the transducer is facing the bow (front)
of the boat. If the transducer has a built in temp
sensor, it will only show the temperature of the
hull, not the water temp.
Before you epoxy the transducer to the hull, make
sure the area is clean, dry and free of oil or grease.
The surface of the hull must be at so the entire
Transducer epoxied to hull
Epoxy
Transducer
Hull
Keel pad
On vee hulls
try to place the
transducer where
the dead rise is
10° or less.
WARNING: Do not remove material
from the inner hull. Careless grinding
on the hull could damage hull integrity.
Contact the boat dealer or manufacturer
to conrm hull specications.
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transducer face is in contact with the hull. Also, make
sure the cable is long enough to reach the sonar unit.
To use shoot-thru-hull installation:
1. Sand the inside surface of the hull, where
the transducer is to be epoxied, and the
face of the transducer. Sand the hull until
it is smooth to the touch. The sanded
area should be about 1-1/2 times the
diameter of the transducer.
2. After sanding, clean the hull and the face
of the transducer with an alcohol wipe to
remove any dust.
3. Apply a thin layer of epoxy (about 1-16”
or 1.5 mm) on the face of the transducer
and the sanded area on the hull. Be
careful when mounting a transducer
inside a boat hull. Once epoxied into
position, the transducer can be very
difcult to remove. Epoxy is available
at www.lei-extras.com (Part No. 106-
98).
4. Press the transducer into the epoxy,
turning it to force out any air bubbles from
under the transducer face. Make sure
there are no
air pockets
in the epoxy
layers.
5. Stop pressing
when it bottoms
out on the hull.
Apply pressure to hold the transducer in
place while the epoxy sets. Be careful not
to move the transducer while the epoxy
is setting. Allow the epoxy to set before
moving the boat.
Epoxy transducer to hull.
HullEpoxy
Apply epoxy to transducer
face and mounting location.
Sand transducer face
and mounting location
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The top of the Pod
transducer is curved to t
the contour of the trolling
motor, so you do not
need a TMB-S mounting
bracket.
Position the transducer
to so its face is pointing
straight down when the
trolling motor is in the
water.
Flat washer
Lock
nut
Bolt
Internal tooth
washer
Plastic bracket
6. When nished, the face of the
transducer should be parallel with the
hull with a minimum amount of epoxy
between the hull and transducer.
Trolling motor Skimmer and
Pod Installation
The TMB-S trolling motor bracket (Part No. 51-45) is
an optional accessory and is available through LEI
Extras at www.lei-extras.com. The TMB-S bracket
is used to attach a one-piece bracket skimmer
transducer to a trolling motor. The Pod transducer
does not need a TMB-S trolling motor bracket to be
installed on a trolling motor. It only needs a hose
clamp (adjustable strap).
Installing transducer on trolling motor:
1. Attach the skimmer transducer to the
bracket as shown in the diagram.
2. Slide the adjustable strap (hose clamp)
through the plastic bracket on the
skimmer transducer or through the Pod
transducer slots and then slip the strap
around the trolling motor.
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Traditional Sonar
3. Position the transducer so its face is
pointing straight down when the trolling
motor is in the water.
4. Tighten the adjustable strap securely
to the trolling motor. Make sure there is
enough slack in the transducer cable for
the trolling mount to turn freely.
Connecting the unit to power
1. Connect the black wire to a ground.
2. Attach a 3 Amp fuse (not included) to
the end of the power wire and then con-
nect the fuse to the positive (+) terminal
on the battery.
3. Connect the Power cable to the Power
port on the back of the display unit.
Adjustable strap
Plastic ties (not
included)
Transducer
cable
NOTE: Use 18 gauge wire to extend the
power or ground wires.
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12V
Optional paddlewheel
speed/temp sensor
Optional temp
sensor
Black (ground)
wire
3 Amp
fuse (not
included)
Red (power)
wire
Speed/temp port;
also used for NMEA
0183
Power
port
External GPS port
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NMEA 0183 Connection Diagram
Shield (ground) NMEA IN (-)
Yellow TX NMEA IN (+)
NDC-4
NMEA0183
Temp /Speed port
Optional NMEA
0183 cable
(GPS capable units only)
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