Chain Saw Model:NY-5200 Engine Model:PN1E45E Max Cutting Diameter:500mm Power Type:Single Cylinder ,Two-stroke,Air-cooling gasoline engine. Cylinder Diameter*Stroke:48mm*31mm Displacement:51cc Compress Ratio: 6.1:1 Rated Output Power & Relevant Speed:2.2Kw/7500rpm Fuel Mixture Ratio: 25/1(Gasoline 25 : Two-cycle Oil 1) Fuel Tank Capacity :550ml Engine Oil Tank Capacity:260ml Chain Oil:Special oil for two-cycle engine Lgnition System: C.D.I Starting System:Automatic recoil hand starter Guide Bar Size:18'/20'/22' Chain:Oregon/Carlton Chain Pitch:0.325' Chain Gauge:0.058' G.W/N.W:7.7/6.5kg