Here's how. Start with a fuel sender, which you can purchase from us or from Aircraft Spruce, which looks like this:
Of course, you'll need a fuel gauge. Many different companies sell them. Ours features brilliant adjustable daylight readable LEDs, and minimal power consumption, and absolute lowest weight (less than one ounce). It looks like this:
|fuel gauge from Belite|
We also use a classic red 5 gallon tank from Walmart, and we drill a hole in the top for the fuel sender. (We also drill a hole for the fuel line 'bobber' to feed through.) The tank must be vented, and the 'slop' around the fuel line hole provides this venting.
It looks like this:
|Fuel tank for ultralight with fuel sender hole drilled out.|
One of the neat things about using this kind of tank is that if you use a quick release fitting on the fuel hose, you can swap one fuel tank for another in your ultralight airplane.
After installation, follow instructions with the fuel probe for setting the empty and full positions on the gauge.