Engine specification Cylinder displacement 70.7 cc Power output 5.3 hp Idling speed 2700 rpm Maximum power speed 9600 rpm Maximum recommended engine speed 13500 rpm Cylinder bore 1.97 inch Cylinder stroke 1.42 inch Ignition system SEM AM50 Ignition module air gap 0.01 " Spark plug NGK BPMR7A Electrode gap 0.02 " Carburetor model name HD68 Fuel tank volume 1.62 US pint Oil tank volume 0.84 US pint Oil pump type Adjustable flow Oil pump capacity 4-20 ml/min Cutting equipment Chain pitch 3/8" Recommended bar length, min-max 15"-28" Chain speed at max power 70.21 fts Emission, vibration & noise data Sound level 103 dB(A) Sound power level, LWA 115 dB(A) Vibrations front handle 3.5 m/s² Vibrations rear handle 4 m/s² Overall dimensions Weight (excl. cutting equipment) 13.4 lbs Discount 20%