Engine model: 1E39F Power Type: Single cylinder, Two-stroke, Air-cooling gasoline engine Cylinder diameter*Stroke: 39mm*31mm Ignition system: CDI Engine displacement: 37.2cc Maximum shaft brake power: 1.3kw 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: 310ml Oil Tank Capacity: 210ml Guide Bar Size: 14''/16'' Chain Pitch: 3/8'' Chain Gauge: 0.050'' G.W/N.W 6.0/4.9kg External dimensions: L*W*H 370mm*235mm*270mm