2023 Marathon 100 Gallon DF trailer. Hot Air Jacketed Rubberized Asphalt Kettle. Standard Features: Reverse Load Lid, 1½" Draw Off Valve, 410,000 BTU Propane Burner with Flame-Out Protection, Hose & Regulator with Gauge, and Temperature Thermometer. 5hp Briggs and Stratton with Mechanical Agitation