Dear Bax:

I have downloaded both the OS PA-104 Pump System instructions and the Hobbico OS Pumper Engine's Carburetor instructions and read them.

My question is:

Should I plug the pressure fitting on my tuned pipe and leave the pressure tube on my tank open as a vent?

I have attached a photo showing my setup. Am I correct in plugging the pipe's pressure fitting? Or, do I want to connect it to the tank?

Thank in advance.

David