Installation Instructions

4
Using a jigsaw or a rotary tool, cut the mounting surface
along the inside line on the template.
5
Place the device in the cutout to test the fit.
6
If necessary, use a file and sandpaper to refine the size of
the cutout.
7
If necessary, remove the trim caps.
NOTICE
Use a plastic pry tool when possible. Using a metal pry tool,
such as a screwdriver, can damage the trim caps and the
device.
8
After the device fits correctly in the cutout, ensure the
mounting holes on the device line up with the hole locations
on the template.
NOTE: GPSMAP 12x3 models have six mounting holes.
GPSMAP 9x3 and GPSMAP 7x3 models have four mounting
holes.
9
If the mounting holes on the device do not line up, mark the
new hole locations.
10
Based on your mounting method, drill or punch and tap the
outer holes on the template:
• For the included wood screws, drill 3.5 mm (
9
/
64
in.) holes,
and skip to step 18.
• For the included nut plate and machine screws, drill
3.5 mm (
9
/
64
in.) holes in the outer hole locations.
• For the included machine screws without the nut plate,
punch and tap M3 holes, and skip to step 18.
11
If you are using a nut plate, starting in one corner of the
template, place a nut plate over the hole drilled in the
previous step.
The other hole on the nut plate should line up with the
inner hole on the template.
12
If the inner hole on the nut plate does not line up with the
inner hole on the template, mark the new hole location.
13
If you are using a nut plate, using a 3 mm (
1
/
8
in.) drill bit, drill
a hole in the inner hole location.
14
Repeat to verify placement of the remaining nut plates and
holes on the template.
15
Remove the template from the mounting surface.
16
Starting in one corner of the mounting location, place a nut
plate on the back of the mounting surface, lining up the
holes.
The raised portion of the nut plate should fit into the inner
hole.
17
Secure the nut plates to the mounting surface by fastening
the pan head machine screws through the inner holes.
18
Install the foam gasket on the back of the device.
The pieces of the foam gasket have adhesive on the back.
Make sure you remove the protective liner before installing
them on the device.
19
If you will not have access to the back of the device after you
mount it, connect all necessary cables and install microSD
cards in the back of the device before placing it into the
cutout.
NOTICE
To prevent corrosion of the metal contacts, cover unused
connectors with the attached weather caps.
20
Apply marine sealant between the mounting surface and the
device to properly seal and prevent leakage behind the
dashboard.
21
If you will have access to the back of the device, apply
marine sealant around the cutout.
22
Place the device into the cutout.
23
Secure the device to the mounting surface using the flat head
machine screws or the included wood screws.
24
Wipe away all excess marine sealant.
25
Install the trim caps by snapping them in place around the
edges of the device.
Connection Considerations
After connecting the cables to the device, tighten the locking
rings to secure each cable.
Power/NMEA 0183 Cable
• The wiring harness connects the device to power, NMEA
0183 devices, and a lamp or a horn for visible or audible
alerts.
• If it is necessary to extend the NMEA 0183 or alarm wires,
you must use 22 AWG (.33 mm²) wire.
• This cable provides one differential NMEA 0183 input and
output port.
Item Wire Color Wire Function
Red Power
Black Ground (power and NMEA 0183)
Blue NMEA 0183 TxA (Out +)
Gray NMEA 0183 TxB (Out -)
Brown NMEA 0183 RxA (In +)
Violet NMEA 0183 RxB (In -)
Orange Accessory on
Yellow Alarm low
Connecting the Wiring Harness to Power
WARNING
When connecting the power cable, do not remove the in-line
fuse holder. To prevent the possibility of injury or product
damage caused by fire or overheating, the appropriate fuse
must be in place as indicated in the product specifications. In
3