HOTSTART ENGINE HEATER TPS181GT10-000 - Coolant preheater - 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: 500  700 CID (8.2  11.5L) Volts: 120v - kW: 1.8 - AMPS: 15 - 60Hz Temperature Range: ON: 100F (38C)  OFF 120F (49C)