OS GF40 40cc 4-Stroke Gas Airplane Engine w/Muffler

FEATURES Ideal for aerobatic or scale aircraft Same firewall mounting system as the O.S. GT33 Walbro carburetor witn integrated choke rod guide that simplifies installation, choke rod guide is integrated with backplate Positive Crankcase Ventilation (PCV) helps keep model and environment cleaner without blow-by gas and oil waste Two year limited warranty through Hobby Services beginning at date of purchase INCLUDES GF40 4-Stroke Gasoline Engine, CM6 Spark Plug, Muffler, Ignition Module and Instructions REQUIREMENTS 2-cycle oil, see SPECS Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack LiPo battery requires voltage regulator Propeller: 18x8 for break-in, 18x8-12, 19x8-10 20x8-10 Mounting standoffs, length depends on aircraft Gasoline safe fuel tubing and fuel filter SPECIFICATIONS Displacement: 2.438 cu in (39.96 cc) Bore: 1.57 (40mm) Stroke: 1.251 (31.8mm) Practical RPM Range: 1,800-9,000 Weight: Engine, 42.3oz (1200g) Muffler, 4.0oz (113g) Ignition Module, 3.4oz (95g) GasolineOil Mixture: 30:1 - 50:1 25:1 fueloil mixture if brand of oil states 50:1 mix Crankshaft Size: UNF516-24