Lowrance electronic LGC-4000, LGC-BAJA User Manual
Pub. 988-0154-65C
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LGC-4000 & LGC-Baja
GPS Modules
Installation Instructions
This document covers the installation of the LGC-4000 or LGC-Baja GPS
modules and how to connect them to a NMEA 2000 network.
CAUTION: You should read all of the installation
instructions before proceeding. Decide where to install all
components before drilling holes in your vessel or vehicle.
All Lowrance NMEA 2000 capable devices are either NMEA 2000 certied
or certication is pending. See our web site for the latest product status
information.
LGC- 4000 Module, bottom view (left) and top view (right).
The LGC module consists of a male threaded cable connector and the GPS
module. The GPS module contains a 16-parallel channel GPS+WAAS receiver.
The cable length from the connector to the GPS module is 18 inches (45.7 cm.
The module packs with a 15’ extention cable, a T connector and parts needed to
mount the module on a at surface or on a pole.
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Tools and Supplies
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Recommended tools include pliers and a athead screwdriver. If you need to
route the module connector through a bulkhead, you will need a drill and a 7/8”
(22 mm) drill bit. If you are mounting the module directly to at, horizontal
surface, you will need a #31 (3 mm) drill bit for the screw holes.
Mounting the LGC Module
The GPS module can be mounted on any at surface as long as there is room
behind the mounting surface for the screws. The optional pole mount adapter
lets you mount the antenna on a pole or swivel mount that uses standard marine
1”-14 threads.
CAUTION: Do not mount the GPS module in the direct
path of a radar antenna’s beam. Radar radiates high-energy
signals that can interfere with GPS signal reception.
Surface Mount
The GPS module can be installed on any at surface that is at least 3-1/2” (90
mm) wide. Make sure a clear, unobstructed view of the sky is available at the
selected location.
Once you have determined the mounting location, drill the screw holes. The
screws supplied with this unit are about 1-1/8” long (4 mm x 30 mm). Drill .120
diameter (3 mm) holes for the mounting screws.
If you need to route the cable through the mounting surface, drill a 7/8” (22
mm) hole for the cable’s connector. The notch in the antenna housing allows
the cable to pass through, if desired, instead of routing it down through the
mounting surface.
After drilling the holes, pass the O-ring over the cable and press it into the
groove on the bottom of the antenna housing.
Now attach the antenna to the mounting surface, using 4 mm screws and lock
washers. Route the cable to where it connects to the network and plug it in. The
installation is complete.
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LGC module
Pole Mount
The GPS module attaches to the pole mount adapter with the supplied 4 mm
screws. You can route the cable through the notch in the module housing and
down the side of the pole or you can pass it through the pole mount adapter and
run the cable inside the pole. The 1”-14 threads on the pole mount adapter t a
standard marine antenna mounting pole.
Place module
onto pole
mount
Attached module to
pole mount using
supplied 4mm screws
Powering Your GPS Module
Your LGC GPS module is powered by the NMEA 2000 network, so your network must be connected to a power source.
Expanding a NMEA 2000 network
If you want to expand your NMEA 2000 network by adding more devices,
purchase a Lowrance Expansion Kit.
Refer to the NMEA 2000 General Information document, part number 9880154-17D for more information about NMEA 2000 networks.
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