2020 Marathon 100 Gallon DF trailer., ***SPECIAL PRICE ON USED UNIT*** CALL FOR UPDATED PICTURES. 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. 5.5hp Honda with Mechanical Agitation