CRRC PRO GF55ii gasoline engine for model aircraft This GF55iigasoline engine is the newest one made by CRRC PRO.Great choice for your airplane! Specification Type: Two-stroke piston valvegasoline engine for model aircraft Displacement: 55cc (27.2ccx2) Bore x Stroke: 34mmx 30mm Carburetor: Walbro(Diaphragm & Butterfly Valve) Max. Output: 5.6ps/7600rmp RPM Range: 1600-7800rpm Weight: about 1780g (Engine + Muffler + CDI ignition) Ignition Power: Auto Advanced CDI (DC 4.8Volts, 4 cell NiCad or NiMh Battery) Fuel mixture(Ratio of gasoline and oil): 25-40:1 Propeller: 20x12—23x8 two-blade prop(recommended 22x8 prop) Package Included CRRC Pro GF55ii gasoline engine for model aircraft 2 mufflers, CDI ignition Gasket and Bolts Machined Engine Mounting Standoffs English user manual Warning. This GF55ii gasoline engine is specially designed for the airplane model. Please don't use for any other purpose.We’re responsible for the replacement due to our manufacturing defect. However, we don't take charge of improper operation, unfamiliar repair work, rebuild without permission or using non-original parts.Attention! This GF55iigasoline engine is not a toy. Any misuse may cause serious injury or even death. Please read the user manual carefully to know how to use and operate.,