1、Performance 5.5HP/7500rpm Idle Speed: 1350 rpm/min.) 14.2Kg Pulling Force / 100 meters Altitude 12.5Kg Pulling Force / 1800 meters Altitude The specification of the aircraft propeller: 22×8; 22×10；23×8；23×10； the type of the sparking plug ：NGK CM6 2、Parameter Exhaust Amount ) ：55.6cm3 diameter × stroke ) : 45mm×35mm Ratio of compression)：7.6：1 Ratio of lubricating capacity): 30:1 Weight: Main engine - 1310g Exhaust pipe - 100g Ignition apparatus - 120g