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  • Offers traditional 4-stroke benefits with the ease and economy of a gasoline engine
  • Quick, powerful response makes it an ideal choice for aerobatic as well as scale models
  • Perfect for scale aircraft, with a deeper exhaust note that mimics the sound of full-size aircraft
  • Features the GT33’s mounting bolt pattern and mount-to-drive hub distance
  • Outstanding fuel economy — runs on a mix of engine oil and standard gasoline
  • Rear-mounted carb designed by O.S. & Walbro
  • Lightweight ignition module accepts NiCd, NiMH, LiPo or LiFe battery power
  • Muffler and integral backplate mount included
  • Backplate features an integral choke rod guide
  • PCV (Positive Crankcase Ventilation) system recirculates blow-by gas and oil waste for a cleaner engine and environment

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    Copyright Text - 2025 Modelflight

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    OS Engines GF40 Gasoline Four Stroke Aircraft Engine, 40cc, with F6040 Silencer, OSM39400

    SKU: OSM39400
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    A excellent addition to your model, the GF40 from OS Engine combines the economy of a gasoline engine with the power of a 4-stroke.

    $1,599.99
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    OS Engines GF40 Gasoline Four Stroke Aircraft Engine, 40cc, with F6040 Silencer, OSM39400

    SKU: OSM39400
    $1,599.99
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    A excellent addition to your model, the GF40 from OS Engine combines the economy of a gasoline engine with the power of a 4-stroke.

    In stock

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