Heating Fluid: Engine Coolant, Water, other - No pump needed (thermosiphon principle) This durable 120 volt heater is assembled with a built-in thermostat and 4–foot power cord. It has 5/8" hose nipples and circulates coolant through the engine by convection. Ideal for generators, boats, trucks, buses, tractors, and some cars. Quick Start Heaters are easily installed on most brands of generator sets such as Onan, Kohler, Generac, Olympian, and others. Complete with universal bolts for easy installation. A full Avoids cold engine starts | 1 Year Warranty! Exact generic replacement for HOTSTART TPS151GT10-000 engine heaters. Engine Displacement: 350 - 500 CID | 5.7 – 8.2 Liter | Thermostat regulates coolant temperature between ON: 100°F (48°C) – OFF 120°F (48°C) Molded from high Impact, rust, ,corrosion resistant Vibration and shock tested for longer service life Thermostat regulates coolant temperature between 100-120 degrees F. greatly reduced heat loss for more efficient operation. HOTSTART TPS151GT10-000 engine heaters Quick Start Engine Heater Heater for Coolant, Water, engine heater tps151 coolant heater