Engine Series: Usually found in the 500E, 550E, or 550EX SeriesHorsepower/Torque: Roughly 3.4 to 5.5 ft-lbs of gross torque, depending on the specific modelStarting System: Prime 'N Pull or ReadyStart (no manual choke required)Design: Overhead Valve (OHV) design for fuel efficiency and reduced exhaust emissionsFuel Capacity: ~0.8 liters