Garmin 420 Manuale Proprietario

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To successfully operate your unit, you must properly install the unit 

and all of its related parts. Compare the contents of this package 

with the packing list on the box. If any pieces are missing, contact 

your Garmin dealer immediately. Before you begin the installation:

•  Read and follow the instructions to install the unit.
•  Gather the appropriate fasteners and tools.
•  Verify that all cables can reach the unit mounting location and 

the transducer.

•  Wear safety goggles and a dust mask when drilling, cutting, or 

sanding.

1  Select a location.
2.  Mount the unit.
3.  Install the transducer.
4.  Install the wiring harness.
5.  Test the installation.

Consider the following when you select an installation location: 

•  Provides optimal viewing as you operate your boat.
•  Allows easy access to the unit’s keypad.
•  Is strong enough to support the weight of the unit and protect 

it from excessive vibration or shock.

•  Allows room for the routing and connection of the power/data 

and transducer cables. There should be at least a 3-inch (8 cm) 

clearance behind the case. 

DO NOT mount the unit in an area that is exposed to extreme 

temperature or conditions.

  NOTE: The temperature range for the unit is 5°F to 131°F 

(-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.

  NOTE: References to a transducer in this section apply only to 

units with an ‘s’ suffix (i.e., 440s). These units use the transducer

as part of the sonar feature. If you do not have an ‘s’ unit, then 

disregard instructions regarding installing a transducer.