O.S. 65AX Glow-Powered Aircraft Engine



  • O.S. 65AX Glow-Powered Aircraft Engine with Advanced Bimetallic Liner and E-4010A Muffler
  • The perfect power plant for trainers, sport planes and scale aircraft, offering outstanding reliability and easy tuning.
  • Mounts in the same space as the 61FX while being 1.9 ounces lighter and delivering 5 percent more power!
  • Compatible with a wide range of propellers and the E4050 In-Cowl Muffler (OSMG2842), which offers a choice of side or inverted exhaust outlet angles.
  • Pair with Tower Hobbies TOWER Power 10% Airplane Fuel (TOWP1600, sold in quarts) for optimal results.
  • Comes with a two-year limited manufacturer’s warranty.

    The 65AX generates the plentiful power pilots prefer while being 1.9 ounces (53 grams) lighter than the popular 61FX. That means it offers a better power-to-weight ratio for trainer, scale and sport airplanes, and drop-in ease for retrofits as well. For the modeler who wants it all, the O.S. 65AX delivers.


    • Mounts in the same space as the 61FX, allowing for easy drop-ins.
    • 61D carburetor features an angled needle for added pilot safety.
    • Includes the E-4010A muffler, #8 glow plug and needle extension cable set.
    • Compatible with the ultra-quiet, ultra-compact E-4050 Muffler (OSMG2842).


    • Aircraft blend fuel containing 5-20% nitromethane with at least 18% lubricant


    • Displacement: 0.65 cu. in. (10.6 cc)
    • Bore: 0.95 in (24 mm)
    • Stroke: 0.93 in (23.5 mm)
    • Rpm Range: 2,500-16,000
    • Output: 1.73 hp @ 16,000 rpm
    • Weight w/o Muffler: 17.5 oz (497 g)
    • Weight w/Muffler: 23 oz (653 g)
    • Includes: #8 glow plug, 61D carburetor, E-4010A muffler and needle extension cable set
    • Recommended Props: 12×6, 13×6-7 or 14×6

    From the Manufacturer

    This is the O.S. 65AX ABL Aircraft Engine with the E4010A Muffler. Ideal for trainers, sport planes and scale aircraft.