GPSMAP
®
620/640 Marine Mount Installation Instructions
Install the GPSMAP 620/640 marine mount on your boat according to the following instructions. You need the appropriate tools and fasteners
listed. These items are available at most marine dealers. Wear safety goggles, ear protection, and a dust mask when drilling. When drilling,
always check the opposite side of the surface.
If you experience difculty installing the device, seek the assistance of a professional installer, or contact Garmin Product Support. In
the USA, go to www.garmin.com/support, or contact Garmin USA by phone at (913) 397-8200 or (800) 800-1020. In the UK, contact Garmin
(Europe) Ltd. by phone at 0808 2380000. In Europe, go to www.garmin.com/support and click Contact Support for in-country support
information, or contact Garmin (Europe) Ltd. by phone at +44 (0) 870.8501241.
Before installing your GPSMAP 620/640 marine mount, conrm that the package contains the items listed on the box. If any parts are missing,
contact your Garmin dealer immediately.
See the Important Safety and Product Information guide in the product box for product warnings and other important information.
These instructions detail the three primary steps for installing your GPSMAP 620/640 marine mount:
1. Selecting a location.
2. Installing the marine-mount base and connecting the marine-mount bracket to the marine-mount base.
3. Connecting the marine-mount bracket to power.
Although they are not necessary to use the GPSMAP 620/640, these instructions cover two additional installation options:
• Connecting the GPSMAP 620/640 marine-mount bracket to other NMEA 0183-compatible devices, such as a VHF radio with Digital
Selective Calling (DSC).
• Connecting the marine-mount bracket to an external audio device.
Step 1: Select a Location for the GPSMAP 620/640 Marine Mount
Consider the following when you select an installation location:
The location should provide optimal viewing as you operate your vessel and allow easy access to the touchscreen.
The surface must be strong enough to support the weight of the GPSMAP 620/640 and protect it from excessive vibration or shock.
The location must be at least 17 in. (43 cm) away from a magnetic compass to prevent electromagnetic interference, which can cause
inaccurate compass readings.
The location should not be exposed to extreme temperature conditions. The GPSMAP 620/640 is designed for operation from 5°F to 131°F
(from -15°C to 55°C).
Step 2: Install the GPSMAP 620/640 Marine-Mount Base and the Marine-Mount Bracket
Install the marine mount on a console or overhead. Install the marine mount with the following tools and hardware (not included):
Three number 8 (4 mm) pan-head machine bolts with matching nuts and washers, or three number 8
pan-head self-tapping screws. Do not use bolts or screws with a countersunk head.
Phillips screwdriver
Drill and drill bit
To install the marine-mount base:
1. Disconnecttheswivelxture➊ from the bottom of the mount base ➋ by loosening the short knob ➌.
2. Usingtheswivelxtureasatemplate,markthelocationofthethreeholesusedtosecurethe
swivelxturetothemountingsurface.
3. Drill holes in the marked locations.
If you are using number 8 (4 mm) pan-head machine bolts, drill three
3
/
16
in. (5 mm) holes.
If you are using number 8 (4 mm) pan-head self-tapping screws, drill three
1
/
8
in. (3.2 mm) pilot
holes no deeper than half of the screw length.
4. Securetheswivelxturewithyourmountinghardware.Donotovertighten.
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➋
➌
➍
➎
➊
➋
➌
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➎
November 2008 190-01006-02 Rev. A Printed in Taiwan
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