Humminbird Onix Opeartion Manual page 230

Change the Fuel Tank or Fuel Flow Source Assignments
The instructions in this section are optional and allow you to change which fuel tank is assigned as the Tank 1, Tank 2, or Tank 3
source in the control head. You can also use these instructions to change the fuel flow rate Sensors (Fuel Flow) assignments. The
menu options are determined by the type of sensors installed.
1. Press the HOME key.
2. Select Settings.
3. Select Network.
4. Select Data Sources.
5. Under Fuel Data, select Tank 1, Tank 2, or Tank 3.
If fuel flow rate sensors are installed, select Fuel Flow - Engine 1, 2, or 3.
6. Turn off Auto-Configure.
7. Select a fuel tank from the list.
NMEA 2000 Setup 230