Best anti-vibration system magnesium alloy case, light weight and high strength. Huge power streamlined and good out-looking, automatic chain oil supplying system. Engine model: 1E46F Power Type: Single cylinder, Two-stroke, Air-cooling gasoline engine Cylinder diameter*Stroke: 46mm*21mm Ignition system: CDI Engine displacement: 51.5cc Maximum shaft brake power: 2.2kw Engine speed: Maximum speed with cutting Attachment 13000r/min Maximum idling speed: 2800r/min Minimum clictch engagement speed: 4000r/min Fuel Mixture Ratio: 25: 1(Gasoline 25: Two-cycle oil FB1) Chain oil: Motor oil SAE10W-30 Fuel Tank Capacity: 550ml Oil Tank Capacity: 260ml Guide Bar Size: 16'/18'/20' Chain Pitch: 0.325' Chain Gauge: 0.058' G. W/N. W 7.7/6.5kg External dimensions: L*W*H 450mm*250mm*282mm