So I have a 4x2 older series gator which I removed the carburetor to clean. A small yellow hose came off with it. The other end of the small diameter yellow hose has a stretched out end to support a larger connection of some sort (See Pic)?? I plugged it at first and the engine would barely run. Out of chance, I unplugged the line and the engine ran fine. This said, I was thinking that maybe this line pulled air off the gas tank or oil compartment for emissions compliance but cannot find a connection. I looked at my gas tank parts list and did not see any vent connections there. Any help would be appreciated.