The black T's are your fuel inlet. The two taps on your petcock should T together and go to your black T's, on each side of tank and carbs. As far as the white T's, look at where they go on inside of carb. If they go to the top area of bowl chamber and it's an open hole they are vents and must be vented not plugged off.
In first video, if the fuel line that you have hooked up to the prime goes to the white T's that is why fuel squirts out the air jet. White T is vent. You must verify that white T is vent.
In first video, if the fuel line that you have hooked up to the prime goes to the white T's that is why fuel squirts out the air jet. White T is vent. You must verify that white T is vent.
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