Product Model: GS5200 Specification: Power Type: single cylinder, 2-stroke, air-cooling gasoline engine Displacement: 52cc Compress Ratio: 6.1:1Rated Output Power & Relevant Speed: 2.0Kw/7500rpm Idling Speed: 2800rpm Ignition System: C.D.I Carburetor Type: Pump-Film Type Starting System: Automatic Recoil Hand Start Oil Feeding System: Automatic Pump With Adjuster Fuel Tank Capacity: 560ml Fuel Mixture Ratio:25/1 (Gasoline 25 : Two-cycle Oil 1)Chain Pitch: 0. 375" Chain Gauge: 0. 063" Guide Bar Type: Multi-tier / Sprocket Nose Standard Saw Chain: Oregen/ Carlton Saw Chain Standard Guide Bar Size: 20" Max cutting diameter:22''(500mm)Weight: 5. 0kg We thank you very much for your attention and look forward to your reply soon. E-mail: .cn MSN: