There are one tube that goes to the fuel, And then two that goes from the top, then i think theres 2 left, Those two are just for overpreassure or something i think.
Nah not really hundred percent sure mate, but on first starting mine, it wouldn't idle less than around1800 instead of 1300-1400, needed choke all the time, no matter what setting idle/screw was set at, turned out it was crank seal flywheel side letting air in