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Item

Wire Color

Wire Function

Red

Power

Black

Ground

Yellow

Alarm

Video Input and Output Considerations

This device allows video input from composite video sources 

and video output to a monitor, depending on the model. When 

connecting video input and output sources, observe these 

considerations.
• The chartplotter may have one composite-video input port 

labeled CVBS IN or two composite-video input ports labeled 

VIDEO 1 and VIDEO 2.
◦ The composite-video ports use BNC connectors. You can 

use a BNC to RCA adapter to connect a composite-video 

source with RCA connectors to these ports.

◦ The video from sources connected to these ports is 

available only for display on the device or on an additional 

monitor connected to the device. Composite video is not 

shared across the Garmin Marine Network or NMEA 2000 

network.

• The chartplotter may have one DVI-D video output port. You 

can connect a DVI-D or DVI-I cable to the port to view a 

mirror image of the screen on a computer monitor or HD TV.
◦ If your device includes a DVI cable connector, a rubber 

gasket is included. This gasket must be installed between 

the DVI port and cable connector to avoid damage to the 

connector.

◦ If needed, you can use a DVI-D to HDMI

®

 adapter to 

connect to an HD TV or other HDMI compatible display.

◦ Although it is recommended to use DVI cables sold by 

Garmin, high-quality third-party DVI cables may be used. 

You should test the DVI cable by connecting the devices 

before routing the cable.

J1939 Engine Network Connection Considerations

NOTICE

You must use a Garmin GPSMAP J1939 accessory cable when 

connecting the chartplotter to the J1939 engine network to 

prevent corrosion due to moisture. Using a different cable voids 

your warranty.
If you have an existing engine network on your boat, it should 

already be connected to power. Do not add any additional power 

supply.

This chartplotter can connect to an engine network on your boat 

to read data from compatible devices such as certain engines. 

The engine network follows a standard and uses proprietary 

messages.
You should connect only one chartplotter to one engine network. 

Connecting more than one chartplotter to one engine network 

may result in unexpected behavior.
The port labeled J1939 is used to connect the device to the 

existing engine network. You must route the cable within 6 m 

(20 ft.) of the engine network backbone.
The Garmin GPSMAP J1939 accessory cable requires 

connection to a power source and proper termination. For more 

information on connecting to your engine network, see the 

manufacturer's engine documentation.

Pin

Wire Color

Description

Bare

Shield

Red

Power, positive

Black

Power, negative

White

CAN High

Blue

CAN Low

Specifications

All Models

Temperature range

From -15° to 55°C (from 5° to 131°F)

Material

Die-cast aluminum and polycarbonate 
plastic

Water rating

IEC 60529 IPX7 

1

Input voltage

From 10 to 32 Vdc

Fuse

6 A, 125 V fast-acting

NMEA 2000 LEN @ 9 Vdc 2
NMEA 2000 Draw

75 mA max.

Wireless frequency

2.4 GHz @ 19.5 dBm nominal

7x07 Models

Dimensions (W × H × D)

22.2 × 14.2 × 6.1 cm (8.75 × 5.6 × 
2.6 in.)

Display size (W × H)

15.5 × 8.6 cm (6.1 × 3.4 in.)

Weight

1.13 kg (2.5 lb.)

Max. power usage at 10 Vdc

24 W

Typical current draw at 12 Vdc 1.5 A
Max. current draw at 12 Vdc

2.0 A

Compass-safe distance

80 cm (31.5 in.)

Memory card

2 microSD

®

 card slots; 32 GB max. card 

size

7x08 Models

Dimensions (W × H × D)

24.4 × 16.0 × 7.6 cm (9.6 × 6.3 × 
3.0 in.)

Display size (W × H)

17.8 × 10.2 cm (7.0 × 4.0 in.)

Weight

1.41 kg (3.1 lb.)

Max. power usage at 10 Vdc

27 W

Typical current draw at 12 Vdc 1.8 A
Max. current draw at 12 Vdc

2.3 A

Compass-safe distance

70 cm (27.6 in.)

Memory card

2 SD

®

 card slots; 32 GB max. card size

7x10 Models

Dimensions (W × H × D)

28.9 × 20.6 × 7.6 cm (11.4 × 8.1 × 
3.1 in.)

Display size (W × H)

21.8 × 13.5 cm (8.6 × 5.3 in.)

Weight

2.36 kg (5.2 lb.)

Max. power usage at 10 Vdc

30 W

Typical current draw at 12 Vdc 1.95 A
Max. current draw at 12 Vdc

2.5 A

The device withstands incidental exposure to water of up to 1 m for up to 30 min. 

For more information, go to 

www.garmin.com/waterrating

.

5

Summary of Contents for GPSMAP 74 Series

Page 1: ...mperature range for this device is listed in the product specifications Extended exposure to temperatures exceeding the specified temperature range in storage or operating conditions may cause device...

Page 2: ...ify placement of the remaining nut plates and holes on the template 13Using a 3 5 mm 1 8 in drill bit drill the smaller holes 14Remove the template from the mounting surface 15Starting in one corner o...

Page 3: ...iled mapping When connecting Garmin Marine Network devices to this device observe these considerations All devices connected to the Garmin Marine Network must be connected to the same ground If multip...

Page 4: ...be connected to a common ground For two way communication with a NMEA 0183 device the internal ports on the NMEA 0183 data cable are not linked For example if the input of the NMEA 0183 device is con...

Page 5: ...etwork on your boat to read data from compatible devices such as certain engines The engine network follows a standard and uses proprietary messages You should connect only one chartplotter to one eng...

Page 6: ...s obsolete 130312 Temperature obsolete Transmit PGN Description 126464 Transmit and receive PGN list group function 127497 Trip parameters Engine Receive PGN Description 065030 Generator average basic...

Page 7: ...lectronic engine controller 2 61444 Electronic engine controller 1 65031 Exhaust temperature 65172 Engine auxiliary coolant 65252 Shutdown 65253 Engine hours and revolutions 65262 Engine temperature 1...

Page 8: ...2016 Garmin Ltd or its subsidiaries support garmin com...

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