Before every use, check the engine assembly, propeller and airframe carefully for loose screws and nuts.(Loctite is strongly recommended on all the screws.

During the break-in process, engine must running with shock absorber installed. Or the engine will be seriously damaged by vibration.

Always stand clear of and behind the propeller; never allow anyone including yourself, to be in front of or to the sides of the propeller when starting or running the engine. Anyone near the engine should wear protective eyewear. Do not wear loose clothing near the engine or propeller.

• Performance: 3.7HP/8500rpm
• Idle Speed: 1600 rpm/min.
• Static Thrust: 8.5kg at 100 metres above sea level, 7.5kg at 1800 metres above sea level
• Aircraft Propeller: 18 x 8, 18 x 10, 19 x8, 20 x 8
• Sparking Plug: CM6
• Exhaust Amount: 30.5cm³
• Diameter x Stroke: 36mm x 30mm
• Compression Ratio: 7.6 : 1
• Lubrication Ratio: 30 : 1
• Ignition Voltage: 4.8-8.4V
• Weight: Approx. 2.8lb (1258g)