Early 912 ULS and fuel return lines...

I second what Bill said. Absolutely not the balance tube.

They are talking about the Fuel Distribution Block (P/N  851328) which happens to mount onto the compensating tube.

Bill,

And that is why I was confused about the installation instructions KitFox provided.  The compensation tube is meant to balance the fuel/air mixture, manifold pressure, between the two intake manifolds.  To clarify a few more points this is an experimental amateur-built (EAB) and does not have a Rotax fuel distribution block. The builder ran a fuel line from the pump to a brass T and then split the hoses off to each carb.    

The Rotax fuel distribution block is nice because it incorporates the two carb lines, the return line, and a pressure-sensor fitting.  They designed it to clamp to the outside of the compensating tube but it has no connection thereto.

Tyler Hathaway wrote:

They are talking about the Fuel Distribution Block (P/N  851328) which happens to mount onto the compensating tube.

I cannot find that part number (P/N 851328) in the Illustrated parts catalog.  Is there a newer part number, or was there a typo?

Thanks.