Fuel Feed and Return line what Diameter lines?

[a68cudas]

TM manualtm9-2320-289-34p page 20-1 saysto make your own line from steel tubing and only gives lengths of 78,69 for the fuel feed and 73,44 length for fuel return. Does anyone know what size diameter line in need to get for both of those? Thank You Dave

 

[cucvrus]

I am thinking 5/16" or 3/8" for feed line and 1/4" for the return. I have used 3/16" for return with no problems. I just have coils of it and wanted to use some of it up.