Humminbird 997c SI Combo, Installation And Operation Manual

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3. Use electrical tape to secure the NMEA pigtail to the cable as
shown.
NOTE: Leave the NMEA pigtail secured to the cable unless needed. This will
make removing the receiver easier.
4. Route the GPS receiver cable through the stem and continue with
the planned route you chose in step 1.
5. Attach the GPS receiver to its base using the included #6 - 7/8"
screws.
Access Under Mounting Location
Follow these steps to deck mount the GPS receiver when routing the cable
down through the mounting location:
1. Determine the best location, then test route the 20' (6 m) cable from
the mounting location to the control head.
NOTE: Installation details may vary with unit configuration.
2. Mark the mounting location and drill a 3/4" (19 mm) hole for the
cable and cable plug. Route the cable.
3. Cover the cable hole with the receiver. Make sure the receiver is
flush on the surface and mark the two mounting holes with a pencil
or punch.
4. Move the receiver to the side and drill two pilot holes using a 9/64"
(3.5 mm) bit.
NOTE : Remember to caulk or seal screw holes and drilled holes as needed to
protect your boat from water damage.
5. Align the GPS receiver screw holes over the pilot screw holes and
attach with the #8 - 1 1/4" Phillips head screws. Hand tighten only!
NOTE: If the mounting surface is thin and made of a lighter material, a backing
material may be needed below the mounting surface.
NMEA Pigtail Taped 1
NMEA Pigtail Cable Out
2
Mounting Screws
3
Cable Route
4
1
2
4
3
22