Main Fuel shutoff mod

[avidflyer]

Soaring VA, The valve you show looks like what I have used in 4 different Avids, and 1 Kitfox. Engines were 532, 582 Rotax, and 2200 Jabiru with 1/4" fuel lines. Never noticed not having enough fuel flow. Come to think of it, that's also what I used in the ultralights before the Avids. You should do a fuel flow test on your fuel system before first flight to see how much fuel flow you can get. I believe 150% of maximum fuel burn is recommended. JImChuk

[SoaringVA]

Wow, thanks everyone for all of the help. The model is Kitfox 4-1200 and here is what we have now. T J, I really like the WOG valve and the location you've used. Can you bend that solid fuel line? Do you have to worry about 90 degree fittings cutting flow? The flow test is a great idea.

Thanks

[t j]

The fuel line is what came with the kit. It's 5/16 aluminum. Kitfox part number 41910. Solid line is measured outside diameter. All the bends were made with just my hands.

The location of the valve bracket is by the book (Builders manual). It is secured by the throttle linkage.

Each fitting and bend reduces the fuel flow a little so keep bends, fittings fuel filters, etc. to only what is required.

I checked the valve and it is 1/4 inch. The fuel flow from the panel tank to the gascolator at bottom of the firewall is 14.3 gallons per hour nose high.