5.5HP/7500rpm (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: 22X8, 22X10, 23X8, 23X10 The type of the sparking plug :NGK CM6. Exhaust Amount : 55.6cm3 Diameter*stroke : 45mmX35mm Ratio of compression: 7.6:1 Ratio of lubricating capacity: 30:1 Weight: Main engine :1310g Exhaust pipe :100g Ignition apparatus :120g. Standard Lot Size:1 unit Weight:2.5Kg.