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4 out of 5 Customer Rating

FS-120 III Surpass Ringed 1.20 4-Stroke with Pump

Item No. OSMG0935
Brand Logo
4 out of 5 Customer Rating

FS-120 III Surpass Ringed 1.20 4-Stroke with Pump

Item No. OSMG0935
$519.99 Price reduced from $799.99 to
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Product Details

Building the 4-Stroke of the future, one engine at a time!

Surpass™ engines share features that include a helical gear-driven camshaft up front and a reliable rear updraft carb. Generous intake valves and CNC-machined parts add superior fit, power and compression. Rugged ringed pistons and ball bearing-supported crankshafts contribute smooth, trouble-free operation. Most also include rubber-sealed ball bearings, a reversible carb for easy installations and corrosion-resistant plating on the crankshaft, camshaft and piston.


O.S. Engines two year limited warranty
  • High torque for spinning bigger props.
  • Quieter, more realistic airplane sound.
  • Generous with power — stingy with fuel.

Product Specifications

Specs

HP 2.1PS, 2.07 HP @12,000 RPM
Muffler Type 2-piece aluminum
Muffler Weight 2.8 oz (79 g)
Oil Type & Content At least 16% synthetic lubricant
Plug Type F
Product Height 5.5" (139.5mm) crankcase botton to top of cylinder head
Product Length 5.3" (134mm) from carb to front of drive hub
Product Width 2.6" (67mm) at mounting tabs
Prop Range 14.9 - 16x6
Recommended Fuel 5%-15% four cycle blend nitromethane
RPM Range 2,000 - 12,000
Stroke 1.08" (27.5mm)
Crankshaft Threads UNF5/16 - 24
Crankshaft Type Threaded
Carb Type O.S. 70N 2-needle rotary with built-in regulator
Displacement 0.70 cu in (11.5cc)
Engine (Only) Weight 32.5 oz (921g) w/o muffler
Cylinders Single
Power Type Glow
Bore 1.20" (30.4mm)