(Outlined in green, connecting pipes in blue and red).
and looks like this:
Take it out and give it a proper clean with some carb cleaner, and then oil it properly.
If it idles high, undo the locking nut on the bottom, and adjust the idle stop screw. BTW, the jubilee clips face downwards, so you might have to get under the car to undo them, they're a ******* to remove.