2, GF65:Capacity:65cc Parameter: Configuration:2 cycle piston valve type gasoline engine for airplane Piston displacement Cylinder(cc): 65 cc Bore X Stoke (mm) : 1-48mm X 36mm Carburetor: Walbro pump (Made in Japan) & Made in China (Diaphragm butterfly valve type ) Ignition: DC-CDI (Computer Controlled auto advance,electronic ignition system) Power supply: 4.8-6V Weight: 2180g ( including ignition and muffler ) Weight:1835g(not including ignition and muffler) Maximum output: 5.5hp/5.35KW Speed Range: 1500-8200 rpm Gasoline Version : Pre-mixed Fuel ,25-40 : 1 (90% high otcane unleaded gasoline,Import gas into carbon fiber installations valves) Lubrication oil: 2 cycle engine oil Propeller selection :22*10 7500rpm ,21*10 7800rpm ,22*12 7300rpm (Two leafs prop) Cooling system : Air cooled Packing Weight : G.W . : 2485g N.W. : 2180g Remark: the gross weight include weight of individual Packing