Abstract: A compressed oil burner which includes an operating nozzle having a valve body which is yieldingly loaded against a valve seat in a direction opposite to the flow direction so that fuel is supplied at a pulsating pressure, a sleeve surrounding the operating nozzle with adjustable dampers for supplying air thereto and check valves for exhausting fuel and air mixtures, a separate starting nozzle having an air fuel mixing chamber with outflow apertures positioned on the sleeve in front of the operating nozzle and fuel and air inlets into the chamber to supply fuel and air thereto when the fuel supply to the operating nozzle is closed.