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GF40 4-Stroke Gas Engine w/F-6040 Muffler

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GF40 4-Stroke Gas Engine w/F-6040 Muffler

O.S. Engines OSMG0800 (39400) Airplane Engine Gas
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  • GF40 4-Stroke Gas Engine w/F-6040 Muffler

    This is the O.S. Engines GF40 4-Stroke Gasoline Engine.


    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


    GF40 4-Stroke Gasoline Engine, CM6 Spark Plug, Muffler, Ignition
    Module and Instructions


    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


    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)
    Gasoline/Oil Mixture: 30:1 - 50:1
    25:1 fuel/oil mixture if brand of oil states 50:1 mix
    Crankshaft Size: UNF5/16-24
    Length from Backplate to Drive Hub: 4.7" (118.5mm)
    Length from Center of Crankcase to Drive Hub: 3.1" (78.6mm)
    Length from drive hub to end of Crankshaft: 1.6" (41mm)
    Length from Carburetor to end of Crankshaft: 7.8" (197.6mm)
    Height from Center of Crankshaft to Rocker Cover: 4.9" (126.7mm)
    Height bottom of Crankcase/top of Rocker Cover: 6.2" (157.2mm)
    Distance between Vertical Mounting Hole Centers: 2.1" (54mm)
    Distance between Horizontal Mounting Hole Centers: 2.7" (70mm)
    Width of Cover Plate: 3.3" (83.7mm)

  • O.S. Engines GF40 4-Stroke Gas Engine w/F-6040 Muffler Parts List (0 items)

  • O.S. Engines GF40 4-Stroke Gas Engine w/F-6040 Muffler Hop-Ups & Optional Accessories (0 items)

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