Products
FS-120S III-P w/Pump

Surpass Series

O.S. developed the Surpass Series of 4-stroke engines for discerning fliers who demand more power. Able to swing larger props and supply more usable horsepower, Surpass 4-strokes provide the best performance for your plane, regardless of scale or flying style.

All Surpass engines feature a helix gear-driven camshaft on the front end and dependable updraft carburetor in the back. All include glow plug and standard [...]

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FS-91S II-P w/Pump

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Pump feature adds responsiveness to the FS-91 Surpass

  • New regulating style pump, normally only found in 1.20 class engines, delivers better response and reliabilityFS-91S II-P
  • Rear ball bearing is rubber-sealed on both sides and greased internally to help inhibit bearing corrosion
  • The crankshaft, cam shaft and piston ring are all plated to further resist corrosion
  • Features a reversible carb which allows the needle valve to face either the left or right side of the engine
  • Black anodized rocker cover
  • A large-volume muffler offers better noise reduction for milder sound

SPECIFICATIONS
Stock Number: OSMG0890
Displacement: 0.912 cu in (14.95 cc)
Bore: 1.091 in (27.7 mm)
Stroke: 0.976 in (24.8 mm)
Practical rpm: 2,000-12,000
Output: 1.6 hp @ 11,000 rpm
Weight w/muffler & manifold: 23.9 oz. (678 g)
Weight w/o muffler & manifold: 22.2 oz. (630 g)
Recommended Props: Stunt: 11×10, 11×11, 12×9.5, 12×10, 12×11; Scale: 13.5×8, 14×7, 15×6, 16×6, 12×8 3-blade, 12.5×7 3-blade

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