This will be a dumb question. On my 140RX i am using a two line system the clunk line is going to the pump with a fuel filter in the line, and the vent line of the tank i have terminated in the side of the plane with a fuel dot. in other words the vent line is blocked off and the clunk line goes to the pump. is this correct or is the vent line supposed to stay open when it is running. read the instruction manual and am confused over it. maybe i am just over thinking the problem. anyways hoping to maiden flight the plane with it today so any replies would be nice.
Thanks
Dennis