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Mounting the LCR 120
Before mounting the LCR 120, gather the parts you need: LCR 120, mounting hardware
j\kit power cable, and sensor cable. If the sensor cable is not long enough for your installation,
see “Accessories” earlier in this manual for information on the EC-6 10’ extension cable Next,
consider where to mount the LCR 120. The gimbal mounting bracket offers mounting capabilities
for the top of a shelf or the bulkhead (and lets you tilt the unit forward and backward for ease of
viewing and operation.) To choose the best location, consider the following.
• The mounting surface should be adequately supported to protect the LCR 120 from
excess wave shock and vibration.
• The mounting area should allow at least 2” clearance at the back, sides, and top of the
unit for connection, air flow, and ease of removal.
• Any VHF radio you have may incur some degree of interference with the depth sounder.
Hummingbird depth sounders are designed to minimize this interference, although it is
best to route the sensor cable and antenna cable as far away from each other as
possible- for example, on opposite sides of the boat.
• The sensor and any accessories such as speed and temp should be mounted first, and
their cables routed from the transom forward to the area you have selected to mount the
unit.
After you have determined the best location for your LCR 120, proceed with
the instructions on the following page.
1. Set the gimbal bracket in the mounting surface.
2. Mark 1/8” holes for the mounting screws.
3. At least 3” behind the bracket, drill a 5/8” hole to run the cables through.
4. Set the bracket aside and drill the holes as marked.
5. Pull the power and sensor cables through the 5/8” hole.
6. Insert the cables into the corresponding numbered slot on the back of the LCR 120. Note
that the slots are keyed so that the connectors can only plug-in one way.
7. Install the hole cover to dress the cable through hole and provide strain relief. NOTE: Be
sure to leave enough exposed cable to allow the LCR 120 unit to swivel.
8. Mount the bracket to the boat using 4 1” wood screws.
Mounting the LCR 120
If your boat does not have a fuse panel, you can wire the power cable to the batter with
an in-line 1-amp fuse and fuse holder (not included) in the positive wire, as shown on the
preceding page. Do not connect directly to the batter without a fuse. Attach the black lead to the
negative (-) terminal, and wire the red lead through the fuse to the positive (+) terminal.
NOTE: Do not use any power cable other than the one provided with your LCR120.
Section 3: Testing the Installation
After installing your LCR 120, sensor, and cables, you should test the installation.
Testing should be performed on the water since that is the only way to check your sensor’s
performance.
With your boat at idle, press the POWER button to turn the unit on. The LCR 120
performs a self-test on its electronics, then automatically selects the right depth range and