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  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer
  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer
  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer
  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer
  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer
  • OS Engines FSa-72II Airplane Engine with F-5030 Silencer

OS Engines FSa-72II Airplane Engine with F-5030 Silencer

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    The Tradition Continues...

    O.S. leads the way in advanced 4-stroke engine technology, and you’ll see for yourself when you mount the FSa-72II in your model! Sport flyers will enjoy greater performance, while scale pilots will experience more realistic flight. Plus, everyone will benefit from the FSa-72II’s deep, rich sound.
    • The adjustable F-5030 muffler can be rotated 360° and moved in or out for a perfect fit. Rich, deep sound is an added benefit.
    • Features the same mounting bolt pattern as the FL-70 and the FS-70 Ultimate for easy replacement.
    • A reversible carb and narrower camshaft housing simplify installation.
    • Tighter tolerances and updated engineering reduce maintenance and ease set-up.
    • Delivers more performance power to sport pilots and more realistic flight to scale pilots.
    • Blow-by oil exits through the breather nipple on back plate for more stable operation
    • Black rocker covers
    • 61N aluminum body carburetor with rotary throttle lever, high speed needle valve, and low speed mixture control, extended intake tube eliminates reverse flow tendency of air/fuel mixture, carb is reversible 180°
    • Adjustable F-5030 muffler for quiet operation can be rotated 360° for tight fitting applications

    Product Specs

    Bore
    1.063" (27mm)
    Crankshaft Threads
    UNF1/4-28
    Crankshaft Type
    Threaded
    Cylinders
    Single
    Displacement
    0.719 cu in (11.79cc)
    Engine (Only) Weight
    16.79 oz (476 g)
    Muffler Type
    2-piece aluminum
    Muffler Weight
    1.9 oz (54g)
    Plug Type
    O.S. type F
    Power Type
    Glow
    Product Height
    4.2 in (108 mm) bottom of crankcase to top of rocker cover
    Product Length
    4.1" (103.6mm) from carb to drive hub
    Product Width
    1.8" (45mm) at mounting tabs
    Prop Range
    12x7-8 - 14 x 6-7
    RPM Range
    2,400 - 12,000 rpm
    Stroke
    0.811 in (20.6 mm)
    Total Weight
    1.2 lbs (530g)
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