I recently bought a little 601 with Rotax 912. It has the fuel return line plumbed into the gascolator. After a little incident losing about 300 rpm shortly after takeoff while burning fuel that contained ethanol I A) won't burn fuel with ethanol and B) would like to route the return line back to the fuel tank. It has the 16 gal tank mounted just aft of the firewall.

As 91 AKI E0 fuel seems to have solved this issue I am thinking there was a little vapour in the line...could've been much worse...it was like the mixture was leaned out too much (of course bing carbs with no mixture control).

Wondering if anyone has any suggestions regarding routing, where to plumb it into the tank and what type of fitting is best for this and any other wisdom to pass along.

Thanks a ton!