O.S. Engines, FS-120 SURPASS III W/PUMP

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OSMG0935   O.S.   FS-120 III Surpass w/Pump

TECH NOTES
     This is one of the O.S. Surpass series of 4-stroke model engines.
The Surpass series is the 2nd series of 4-stroke engines (The 1st series was
the FS series, discontinued and replaced by the Surpass series around 1986-7).
"Surpass" refers to this series gaining 30% more power than the previous
FS series.

FEATURES: Specially developed PD-07 pump
          New 70N carb
          Ball bearing-supported camshaft and crankshaft
          New F-5020 Silencer
          Two year warranty

INCLUDES: One Assembled Engine w/Carburetor and #F Glow Plug
          One Muffler w/Manifold
          One Set of Instructions, O.S. Poster, and Decal
          Engine DOES COME with, one Wrench, One Valve Extension, and Two
            Feeler Gauges.
            (Mounting Template Is No Longer Included per O.S.)

REQUIRES: Fuel: 5%-15% nitromethane with 18% lubricant. Synthetic, castor, or
            a synthetic/castor blend may be used.
          NOTE: Certain four-cycle fuels cannot be used due to low oil content.
            However, SOME four-cycle fuels such as the Wildcat 4-Cycle 15%
            (CATP9109) may be used because it has 18% oil content.
            When choosing fuels for this engine, the modeler must be sure to
            select a fuel with at least a 18% lubricant content.
          Starting and Field Equipment.
          Propeller (see SPECS)

SPECS:    Bore: 30.4mm (1.20")
          Stroke: 27.5mm (1.08")
          Power Output: 2.1 BHP at 12,000 RPM
          Practical RPM Range: 2,000 - 12,000 RPM
          Weight: 920g (32.5oz)
          Crankshaft Thread Size: 5/16 X 24
          Valve Clearance: Between .04mm and .1mm (or between .0015" and .004",
             measured between the valve tip and rocker arm)
          Length: 102mm (4.09") from backplate to the front of the drive washer
          Width: 47mm (1.85") width of engine neglecting the mounting flanges
             58mm (2.28") distance between the mounting hole centers
          Height: 139.5mm (5.49")
          Suggested Prop's): 14X9, 14X10, 14X11, 15X8, 15X9, 15X10, 16X6,
          Construction: Aluminum and Aluminum alloys

COMMENTS: Some differences between 2-Stroke and 4-Stroke engines;
            4-Strokes are quieter.
            4-Strokes get better Fuel Economy
            2-Strokes generate More rpm (11,000-13,000 rpm with prop
              and 4-Strokes rev to around 9,500 rpm)
            4-Strokes generate much more torque and will swing a larger prop.
            4-Strokes have a more realistic sound, like a real aircraft engine.

   The new Surpass engines (Version II and III) have more power than
     their predecessors and they also have more corrosion prevention
     on the inside of the crankcases.

ACCESSORIES
THIS IS A 4-STROKE R/C AIRPLANE ENGINE WHICH COMES WITH A MUFFLER, GLOW PLUG,
INSTRUCTION BOOK, AND LOCKNUT SET(1 PROP NUT AND LOCKNUT).  THE STARTING
EQUIPMENT FOR THE ENGINE IS INCLUDED WITH THE AIRPLANE ACG.