ECHO CS-620P-20 20 in. 59.8 cc Gas 2-Stroke X Series Rear Handle ChainsawWith ECHOs highest horsepower per displacement, this ECHO chainsaw does outstanding work. The professional X Series CS-620P gas chainsaw features a performance cutting system, a see-thru fuel tank, tool-free felt air filter cover and a magnesium crankcase and sprocket guard. The side-a access chain tensioner makes for quick and easy adjustments and there is a heavy-duty aluminum grip with a rubber grip.Use a 50:1 ratio of fuel to oil mix for 2-stroke cycle engines, recommend using only fresh gas with a minimum octane rating of 89 or higher (mid-grade to premium) at all times50:1 ratio equal 1 US Gal. 89 octane plus 2.6 fl. oz. orGas powered chainsaw features a 59.8 cc professional-grade 2-stroke gas engineChainsaw comes with a 1-year commercial/5-year consumer warrantyComes with professional-grade 20 in. bar length to handle a wide variety of cutting tasksProfessional-grade magnesium sprocket cover and crank caseHeavy-duty aluminum handle with rubber grip for increased comfort and reduced vibrationPerfect for general firewood cuttingInertia chain break stops chain in a fraction of a secondDecompression valve for easier starter rope pullingG-Force Engine Air Pre-Cleaner maintains clean air supply to engineAutomatic, adjustable clutch-driven oiler reduces oil consumptionDual bumper spikes for more control while cuttingEasy to access, heavy-duty 2-piece air filter for easy cleaningTranslucent fuel tank for quick fuel level checksSafety tip (kick guard) sold separately as an accessory.DimensionsBar Length (in.)20 in.Chain Size20 in.Maximum Cut Diameter (in.)35 in