Ryobi RCS4240B Petrol Chainsaw has a powerful 2 stroke 42cc POWR XT™ Full crank engine that delivers outstanding durability and performance. The three point anti-vibration isolation provides additional user comfort and reduced fatigue during prolonged use. Also has a fast acting inertia activated chain brake for increased safety. Other features include a tool-less chain tensioning system, automatic chain and bar lubrication, and a clear fuel and oil tank for easy view of fluid levels. Specifications Input Power: 42cc Petrol 2 Stroke.Capacity of Tank: 0.34 Litre.Capacity of Oil Tank: 0.192 Litre.Chain Bar Length: 40cm.Chain Speed: 23.8m/sec.Engine displacement: 42cc.Weight: 4.7kg.