Selecting A Mounting Location; Mounting The Chartplotter - Garmin GPSMAP 420 Installation Instructions Manual

Selecting a Mounting Location

Consider the following when selecting a location to mount your chartplotter:
• The location provides optimal viewing as you operate your boat.
• The location allows for easy access to the keypad on the chartplotter.
• The location is strong enough to support the weight of the chartplotter and protect it from excessive vibration or shock.
• Refer to the compass-safe distance table on
• The location allows room for the routing and connection of the cables. There should be at least a 3 in. (8 cm) clearance behind the case.
NotIce: Do not mount the chartplotter in an area that is exposed to extreme temperature or conditions. The temperature range for the chartplotter is
from 5°F to 131°F (from -15°C to 55°C). Extended exposure to temperatures exceeding this range (in storage or operating conditions) may cause failure
of the LCD screen. This type of failure and related consequences are not covered by the manufacturer's limited warranty.

Mounting the Chartplotter

There are two mounting options for the chartplotter:
• Surface Mount—mount the chartplotter onto a bracket (included) that attaches to the console or overhead. The compact waterproof
chartplotter housing is suitable for mounting in exposed locations or at the navigation station.
• Flush Mount—use an optional flush mount kit to mount the chartplotter into a flat panel. For more information on the optional flush mount
kit, visit www.garmin.com
Surface-Mounting the Chartplotter
Use the included bracket to surface-mount the chartplotter. You will need the following tools and fasteners:
• Drill
• Phillips or flat screwdriver
• Three #8 (4 mm) pan-head machine bolts with matching nuts and washers and a
or three #8 pan-head self-tapping screws and a
NotIce: Use pan-head machine bolts or self-tapping screws to secure the swivel base. If you use screws with countersunk heads, you may damage the
mounting bracket.
To mount the bracket assembly:
1. Using the swivel base as a template, mark the location of the three holes that secure the bracket to the
mounting surface.
2. Drill the mounting holes.
• If you secure the base with machine bolts, drill three
marked.
• If you secure the base with self-tapping screws, drill three
locations you marked. Do not make the starter holes deeper than half the screw length.
3. Secure the swivel base with three bolts or screws. Do not overtighten the screws or bolts; you may
damage the swivel base.
4. Place the swivel mount bracket over the swivel base and secure it with the short knob.
To install the chartplotter on the mounting bracket:
1. Align the slot on the back of the chartplotter with the long mounting knob, and slide
the chartplotter into place. If necessary, adjust the knob to spread the bracket arms
apart. (Turn the knob counter-clockwise to widen the bracket arms and clockwise to
tighten.)
2. Adjust the chartplotter angle, and tighten the long mounting knob until the chartplotter
is snug.
3. Rotate the swivel mount bracket by twisting it left or right. The bracket clicks as you
turn it. Select a good viewing angle, and then tighten both knobs.

page 10 to avoid interference with your magnetic compass.
or contact your local Garmin dealer.
/ in. (1.5 mm) drill bit for drilling starter holes.
1
16
/ in. (5 mm) drill bit,
5
32
/ in. (5 mm) holes at the locations you
5
32
/ in. (1.5 mm) starter holes at the
1
16
GPSMAP 400/500 Series Installation Instructions
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