Tilloston 225 T4 - What is this connector?

Hi All, just recently I adquired this 2nd kart with a Tilloston engine 225 T4, and has this connector/hose between two valves in the carb … but the line has a cut to it. I don’t know what it is, and if the cut is making any difference. Could anybody help? Thank you.

It’s a vent for the float chamber. Sometimes fuel will splash out of the vents, the tube stops the fuel spilling everywhere.

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you blow in this cut to fill the fuel bowl .do this till a few drops spill on ground before you try to start engine

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oh wow I had no idea, thanks for clarifying. I see this drop at the bottom of the carb, does this mean the engine is primed and ready to start?

i never look close to see exactly where it drips but yes i blow till drops everytime. guy who sold me my kart new made me blow in it so i knew the “trick” i redo it if it wont fire first pull

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Thanks man you have really helped me a lot !