GPSMAP 392/398/492/498 Owner’s Manual 89
APPENDIX > MOUNTING THE GPSMAP 392/398/492/498
Tools (not included)—Drill, Screwdriver (Phillips or Standard),
three #8 (4 mm) pan head machine bolts with matching nuts
and washers and a 5/32” (5 mm) drill bit, OR three #8 pan head
self-tapping screws and an appropriately-sized drill bit for drilling
starter holes. Always wear safety goggles, ear protection, and a dust
mask when drilling, cutting or sanding.
The swivel base is designed to be secured
using a pan head screw or machine bolt. If
you use a screw with a countersunk head,
you risk damaging the Mounting Base.
OK
To install the GPSMAP 392/398/492/498 swivel base:
1. Using the swivel base as a template, mark the location of
the three holes that are used to secure the bracket to the
mounting surface.
2. If securing the base with machine bolts, drill three 5/32”
(5 mm) holes at the locations you marked.
OR
If you are securing the base with self-tapping screws, drill
starter holes at the locations you marked. Starter holes
should generally be no deeper than half the screw length.
3. Secure the swivel base with three bolts or screws.
DO NOT OVERTIGHTEN.
4. Place the rest of the mount over the swivel base and secure
with the short knob.
Flush Mounting the GPSMAP 492/498
(External Antenna only)
The GPSMAP 492/498 with external antenna can be flush mounted
on a flat panel. When flush mounting the GPSMAP 492/498, be
sure to choose an appropriately sized location for the unit (see unit
dimensions on page 86) and leave 1.25" (32 mm) clearance below
the data card slot for inserting or removing data cards. A Flush
Mount Template is provided in the package. Use the instructions on
the template to complete the flush mount installation.
