Type : 2 cycle piston valve type gasoline engine for airplane Piston displacement Cylinder (cc) : 20cc (1.22 cu in) Bore x Stroke (mm): 1.3 in(32mm) x 9.5 in (24mm) Carburetor : RCGF Ignition : DC- (Computer Controlled auto advance, electronic ignition system) Power supply: 4.8-8.4V Maximum Output :2.8HP /2.1KW Requires: Gasoline, 2-cycle oil, ignition battery & propeller speed rang : 1500-10500rpm Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 , Recommend:30:1 (90% high otcane unleaded gasoline, Import gas into carbon fiber installations valves) Lubrication Oil : 2 cycle engine oil Propeller : 16X6 8900;16X8 7900rpm (Standard Two leafs prop) Suggested Propellers: 14x10, 15x8, 16x6, 16x8, 17x6 Cooling System : Air Cooled RCGF engine package Includes: electronic ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual. The factory batches are different. If there are slight differences in appearance, it does not affect the use of the product. Colour:silver Material:Metal Package Contents: 1 x Model Airplane engine 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.