A portable vaporizer is described herein. The portable vaporizer includes a heating assembly having a base and a heating crucible. An extension adapter is coupled to the base of the heating assembly and slidably received within the chamber body. A cartridge receiver is coupled to the chamber body and receives a cartridge therein. A plunger having a head and a threaded shaft is received within the cartridge. The threaded shaft includes a flat edge. A cover having a bore is coupled to the cartridge receiver. The threaded shaft is threadably received through the bore. A mouthpiece having a central bore is received over the threaded shaft. A detent radially extends into the central bore and engages with the flat edge of the threaded shaft. A rotation of the mouthpiece causes an axial movement of the head of the plunger within the cartridge with respect to the cover.
