RV-8 fuel feed and return line sizes?

Working on a friends rv8 that has flexible lines at the wing root/fuselage connection. The feed line is 3/8....I didn't write the return line size down. These are dry rotted/ cracking and need to go! Anyone know the return line size? This ship has an injected 200hp 360

Check your 6.

You may wish to check your return lines, if you have any as both the return lines on an Io-360 angle valve as well as it's little brother use 1/4" return lines. Most of these engines do not have fuel systems with return flow. I have seen cases where the 1/4" vent line out of the tank gets confused with it being a return line. Hope this helps. Yours as always R.E.A. III #80888

Look at drawing DWG-16A. As was mentioned the forward line is the fuel vent, the aft is the feed to the fuel selector. I have a return line to my right tank but only because I have a purge system. Return line is not standard.