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September 2008 

Part Number 190-00884-01 Rev. A 

Printed in Taiwan

GFS

 10 Sensor Configuration Guide

  See the 

Important Safety and Product Information

 guide in the product box for product warnings and 

other important information.

The GFS 10 provides fuel-flow (volume/time) information for various screens, data fields, 

or digital gauges of NMEA 2000

®

-compatible and Garmin

®

 CANet

®

-compatible connected 

display devices. For a list of compatible Garmin chartplotters and devices, visit 

 

www.garmin.com

.

Important:

 This document provides specific configuration information for the GFS 10 

using your NMEA 2000-compatible or Garmin CANet-compatible display device (such as 

a GMI

 10 or GPSMAP

®

 545). To access the NMEA 2000 or CANet device configuration 

menu on your display device, consult the documentation provided with your display 

device.

 

CautIon: 

The GFS 10 is a sensor that helps you better determine the amount of fuel 

used on your boat, and you should not rely solely on the GFS 10 for fuel-level information. 

Carefully compare information displayed on the unit to all available fuel-level instruments 

and sources.

Troubleshooting Fuel Gauge Type

When wired to a fuel gauge, the gauge type defaults to 

auto Detect

. If the fuel-level 

reading on your Garmin chartplotter or marine instrument changes with the engine RPM, 

the GFS 10 could be detecting the wrong type of gauge.

 

note: 

The fuel level changes with the motion of the boat. Perform this test when the boat is 

not moving.

To test the gauge-type setting:

1.  When the boat is not moving, put the engine in neutral. 
2.  Use the throttle to increase the engine RPM. If the fuel-level reading changes with the 

engine RPM, change the gauge type.

To change the gauge-type setting:

1.  While viewing the NMEA 2000 or the CANet device configuration menu, select the 

GFS 10 device.

2.  Select 

Config

 > 

Gauge Type

.

3.  Choose 

1 Coil 

or 

2 Coil 

and repeat the gauge-type setting test

.

Troubleshooting the Fuel-Flow Rate

If the fuel-flow information received from the GFS 10 appears inaccurate, you can 

manually adjust the fuel-flow reading.

To adjust the fuel-flow rate:

1.  While viewing the NMEA 2000 or the CANet device configuration menu, select the 

GFS 10 device.

2.  Select 

Config

 > 

Flow Adjustment

.

3.  Enter a positive or negative adjustment.

 

example: 

When you set the Flow Adjustment to +10% , a flow reading of 20 gal./hr. 

 

(75 l/h) would change to a reading of 22 gal./hr. (82.5 l/h), because 20 gal. × 110% = 22 gal. 

(75 l × 110% = 82.5 l).

Restoring Factory Default Settings

You can restore factory default settings to the GFS 10. You will lose all custom 

configuration and calibration settings when you restore factory default settings.

To restore factory default settings:

1.  While viewing the NMEA 2000 or the CANet device configuration menu, select the 

GFS 10 device.

2.  Select 

Config

 > 

Factory Defaults

.

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