Small, light, powerful and dependable. An entry level petrol chain saw built for professionals. The CS-310ES is easy to start, easy to maintain and won't let you down. Professionals depend on it. Professional engine Featuring a 34.0cm³ professional grade engine, giving exceptional power to weight ratio. Compact, ergonomic design ECHO chain saws are all designed to the same professional standard, with no exceptions. Hard working, high quality with renowned Japanese build standards. Ergonomic Superbly balanced and lightweight making it ideal for a diverse range of jobs. Product Details. Engine displacement (cm³) 30.5 Output (kw) 1.1 Output (ps) 1.5 Dry Weight (kg) 4.0 Fuel tank capacity (l) 0.25 Chain Oil Tank Capacity (ml) 260 Fuel Consumption At Maximum Engine Power (L/h) 0.68 Priming Pump Yes Ignition System CDI Start Assist System ES-start Chain Brake Inertia Choke w/ Automatic Fast Idle Release Yes Chain Tensioner Side Saw Chain Pitch (inch) 3/8 Guide Bar Gauge (inch) 0.050 (0.043) Applicable Bar Length (cm/inch) 1 30, 35 / 12, 14 Sound pressure level (dB(A)) 97.9 Sound power level (dB(A)) 107.7 CO² (g/kW・h) 2 1128 Vibration Front handle/Rear handle (m/s²) 4.1 / 6.8