Engine: single cylinder, two-stroke, air-cool Ignition system: C.D.I Dimensions(without guide bar and chain): 410 x 235 x 265 (mm) Fuel: Mixture ( Gasoline 25: Two cycle oil 1 ) Fuel tank capacity: 550 (ml) Chain oil: Motor oil SAE#10W-30 Oil tank capacity: 260 (ml ) Engine displacement: 52 ( cc) Maximum engine power: 2.3kw / 7000rpm Maximum engine speed with cutting attachment: 10000rpm Maximum engine speed at idling: 2800rpm Maximum cutting length: 52 (cm) Sprocket: 7T x 0.325 Saw chain type: Carlton/Tiger/Oregon Saw chain pitch: 0.325/0.375(in) Saw chain gauge: 0.058/0.063(in) Guide bar type: Sprocket nose Guide bar size: 18" / 20" Oil feeding system: Automatic pump with adjuster Compression ratio:7.5:1 Net Weight(without guide bar and chain): 5.3kg Gross weight(With 20?cutting attachment):6.6Kg Packing size:50 x25 x30cm Packing quantity:750pcs/20?cl,1820pcs/40?Q