The CS-501P is a lightweight, 12-inch chainsaw designed for quick, efficient cutting, with standard fuel and oil specs, and plenty of replacement accessories for optimal performance. Engine displacement: 50.2 cc (3.06 cu in). Starting system: standard. Ignition: digital. Oiling: automatic/adjustable (clutch-driven). Vibration reduction: standard. Bar lengths: 16, 18, 20 in. Oil capacity: 281 ml (9.5 fl oz). Dry weight: 10.6 lb (4.8 kg). Sprocket cover: plastic. Bar type: Pro-Lite®. Sprocket type: rim. Handle: aluminum. Fuel capacity: 16.6 ml. Carburetor: butterfly-valve diaphragm.