Humminbird AS GR4 - Manual (Page 5)

Access Under Mounting Location
Follow these steps to deck mount the GPS receiver when you can route
the cable down through the mounting surface:
1. Determine the best location, then test route the 20’ (6 m) cable
fromthe Matrix control head to the planned mounting location of
the GPS Receiver.
NOTE: 10’ extension cables may be purchased from Humminbird if your planned
cable route exceeds 20’ (6 m). Maximum cable length, including extension cables,
should not exceed 50’ (16 m). Visit our website at www.humminbird.com, or call
our Customer Resource Center at 1-334-687-0503 to purchase extension cables.
2. Mark the mounting location and drill a ³₄ ” (19 mm) hole for the cable and cable connector.
Secure the NMEA pigtail to the cable with electrical tape. Route the cable.
3. Cover the cable hole with the GPS Receiver. Make sure the Receiver is flush against the
surface and mark the two mounting holes with a pencil or awl.
4. Move the Receiver to the side and drill two pilot holes, using a ⁵₃₂ ” (4 mm) bit.
NOTE: Apply marine-grade silicone caulk or sealant to both screw and drilled holes as needed to protect
your boat from water damage.
5. Align the GPS Receiver’s screw holes over the pilot screw holes and attach with the #6 - ³₄ ”
Phillips head screws. Hand tighten only.
NOTE: If the mounting surface is thin or made of a light-weight material, you may need to add
reinforcing material below the mounting surface in order to support the GPS Receiver.
5
Stem Mount with 1” - 14 Thread
Follow these steps to stem mount the GPS receiver:
1. If you have a pre-existing stem mount, skip to step 2. If you need
to mount the antenna pole (stem), determine the best location,
preplan and test the cable routing to your Matrix unit before any
drilling or cutting of your boat surfaces, then route the 20’ (6 m)
cable to the desired mounting location. Mark the location and
drill a
³⁄₄ ” (19 mm) hole for the cable and cable connector.. If you
have purchased hardware to stem mount your GPS receiver, follow
the instructions included with that hardware to attach the stem to
the boat.
NOTE: 10’ extension cables may be purchased from Humminbird if
your planned cable route exceeds 20’ (6 m). Maximum cable length, including
extension cables, should not exceed 50’ (16 m). Visit our website at
www.humminbird.com, or call our Customer Resource Center at 1-334-687-0503
to purchase extension cables.
2. Screw on the receiver base to the stem first, making sure that the
stem pipe does not protude from the receiver base. This adds
protection to the cable when pulling it through the pipe stem. In
addition to this, deburr the pipe edges to reduce cable abrasion.
3. Use electrical tape to secure the NMEA pigtail to the cable as shown
in the illustration.
NOTE: Leave the NMEA pigtail secured to the cable unless needed in order to
make it easier to remove the GPS Receiver.
4. Route GPS Receiver cable through the stem and continue with the
planned cable route.
5. Attach the GPS Receiver to its base using the included #6 - ¹⁄₄ ”
screws. Hand tighten only.
4
Access Under
Mounting Location
Stem Mount, Attaching
Receiver Base to Stem
Receiver
Base
Receiver Head
Antenna
Stem
Attaching the Receiver to
the Base, Making Sure
Cable is Not Pinched
Cable
Route
Stem
Stop
# - ¹₄” Mounting Screws
NMEA
Pigtail
Taped
NMEA
Pigtail
Cable Out
NMEA Pigtail
Taped to Cable