Engine specification Cylinder displacement 84.7 cc Power output 6.3 hp(I) Idling speed 2700 rpm Maximum power speed 9600 rpm Cylinder bore 2.13 inch Cylinder stroke 1.46 inch Ignition system SEM AM50 Ignition module air gap 0.01 " Spark plug Champion RCJ 7Y Electrode gap 0.02 " Carburetor model name HS290 Fuel tank volume 1.9 US pint Oil tank volume 1.06 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 18"-28" Chain speed at max power 70.21 fts Emission, vibration & noise data Sound level 102 dB(A) Sound power level, LWA 114 dB(A) Vibrations front handle 5.7 m/s² Vibrations rear handle 8 m/s² Overall dimensions Weight (excl. cutting equipment) 15.4 lbs