Auxiliary Tank Usage

Written by Mike Langford.

If you are new to an aux tank the following info will be helpful.

The system is entirely gravity feed. It is essentially a jerry can that is plumbed into the main tank. When the main tank gets low enough you open a valve on the aux tank to transfer the fuel from the aux to the main. 

Here is the process I have been using for years that works well for me. This process has been used on BMW and Triumph. 

  1. Wait until the low fuel light comes on.
  2. Open the aux tank valve.
  3. Monitor the low fuel light for it to go out. This gives you indication that you have fuel transfer to the main tank.
  4. Leave the aux tank valve open until you are ready for more fuel.
  5. Close the aux tank valve before refueling. This is important (see later).

Here are some caveats to be aware of:

Image result for next fuel 150 miles sign

HTH

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