From the O.S. Engine support forum and I quote "It all depends upon the particular installation. Usually, though, one of the outlets has to be restricted to give the fuel tank enough back pressure.

Other modelers have had success by using oversize fuel tubing in the tank and to the engine. This includes any brass tubing or through fittings in the tank.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices (at) hobbico.com "

Thank You!