Flush Mounting the Device
NOTICE
Be careful when cutting the hole to flush mount the device. There is only a small amount of clearance between
the case and the mounting holes, and cutting the hole too large could compromise the stability of the device
after it is mounted.
Use only the included hardware when mounting this device. Using mounting hardware not provided with the
device may damage the device.
To avoid potential damage to the powder coating, use only the included screws to mount the device. Using
screws other than the ones included will void your warranty.
Do not use the device as a template when drilling the mounting holes because this may damage the glass
display and void the warranty. You must only use the included template to correctly drill the mounting holes.
If you will not have access to the back of the device and the microSD memory card slots after installations, you
should install the microSD memory card prior to installation.
The included template and hardware can be used to flush mount the device in your dashboard. There are three
options for hardware based on the mounting surface material.
• You can drill pilot holes and use the included wood screws.
• You can drill holes and use the included nut plates and machine screws. The nut plates can add stability to a
thinner surface.
• You can punch and tap holes, and use the included machine screws.
1 Trim the template, and make sure it fits in the location where you want to mount the device.
2 Secure the template to the mounting location.
3 Using a drill bit according to the list below, drill one or more of the holes inside the corners of the solid line
on the template to prepare the mounting surface for cutting.
Device
Drill bit size
GPSMAP 7x3
6.5 mm (
1
/
4
in.)
GPSMAP 9x3
7.4 mm (
5
/
16
in.)
GPSMAP 12x3
13.5 mm (
9
/
16
in.)
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.
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