Engine Type: 4-stroke, air-cooled gasoline engine.Power: Models are frequently found in 7.5 HP or 5 kW configurations.Port Size: Available in 2-inch and 3-inch inlet/outlet sizes.Performance: Typical 2-inch models offer a productivity rate of approximately 600 L/min.Safety Features: Often includes a low oil sensor or "no oil in unit" warning to protect the engine during startup.