HOTSTART ENGINE HEATER TPS151GT10-000 COOLANT PRE-HEATER - Original - 1 YEAR WARRANTY Pre-Heat: Diesel and Gas engines, construction equipment, trucks, marine and industrial applications Heating Fluid: Engine Coolant, Water, other No pump needed (thermosiphon principle) Engine Displacement: 350  500 CID (5.78.2 L) Volts: 120v - kW: 1.5 - AMPS: 12.5 - 60Hz Temperature Range: ON: 100F (38C)  OFF 120F (49C)