Replace the needle and reassemble the slide.

Insert the slide assembly back into the carburetor.

The needle needs to be lined up with the hole in the carburetor. Make sure that the diaphragm makes a good seal in the carburetor gasket groove.

Insert the spring into the slide assembly and put the plastic housing back on.

Maintain pressure while screwing the four Phillips screws in the housing since it is spring loaded.

Tighten the screws in a diagonal pattern to ensure that the plastic housing is sealed properly.