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OS Engines GF40 40cc 4-Stroke Gas Airplane Engine with Muffler

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  • Detail

    A compact, 4-stroke gasoline powerhouse.

    Ideal for aerobatic or scale aircraft, the 4-stroke GF40 offers added torque and a more realistic sound, plus gas economy and the fit and finish O.S. is famous for. It also includes an ignition module that eases starting and automatically adjusts timing to throttle settings. Other features include a Walbro® carburetor and an integrated choke rod guide that simplifies installation. The GF40 includes a muffler, spark plug and a 2-year limited warranty.
    O.S. Two Year Limited Warranty
    • Easily installs in the same mounting pattern as the GT33
    • Positive Crankcase Ventilation (PCV) system helps keep your model and the environment cleaner without blow-by gas and oil waste
    • Choke rod guide is integrated with the backplate for convenience
    • Includes a special Walbro carb and a compact, lightweight ignition module

    Product Specs

    Benchmark Prop
    18x8-12 - 20x8-10
    Bore
    1.57 in (40mm)
    Crankshaft Threads
    UNF5/16-24
    Cylinders
    Single
    Displacement
    2.44 cu in (39.96 cc)
    Engine (Only) Weight
    2.64 lb (1.2 kg)
    Plug Type
    CM6 Spark Plug
    Power Type
    Gas
    Product Height
    6.2 in (157.2mm) bottom of mount to top of cylinder cover
    Product Length
    4.7 in (118.5mm) from backplate to drive hub
    Product Width
    3.3 in (83.7mm)
    RPM Range
    1,800 - 9,000 rpm
    Stroke
    1.25 in (31.8mm)
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