RCGF 15cc Airplane Petrol EngineParameter: Type : 2 cycle piston valve type gasoline engine for airplane Displacement (cc) : 15cc Bore x Stroke (mm): 29mm*26mm 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: 4.8-6VMaximum Output : 2.1 hp/1.54KW speed rang : 1500-15000rpm Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 (recommended : 30:1)(90% high octane unleaded gasoline, Import gas into carbon fiber installations valves) Lubrication Oil : 2 cycle engine oil Propeller : 15*88000 rpm; 13*8 10000rpm (Standard Two leafs prop)recommended props 13 x 6, 14 x6,13X8,15X8,15X6recommended Airplane: 60 size plane,50 size plane,40 size plane Cooling System : Air CooledN.W.(Includingignitionandmuffler):825g N.W.(Notincludingignitionandmuffler):635g Package included:RCGF 15cc Airplane Petrol Enginemuffler, CDI ignitionMachinedEngineMountingStandoffsandBolts GasketandBolts English user manual