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Instruction Manuals:	Manual 1 (2.3 MB)
Tower Catalog Page:	197
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     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
          (Mounting Template Is No Longer Included per O.S.)
          One additional coarse needle for less sensitive carb adjustment.

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-Without Muffler: 32.5oz (921g)
          Weight-With Muffler: 35.3oz (1000g)
          Crankshaft Thread Size: 5/16-24
          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

          Needle Settings: High Speed: 1.5 turns out from fully closed
                           Low Speed:  2.5 turns out from fully closed with the
                                       throttle fully closed

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.
                                                                     5-7-97 djg
                                                                          ir/jl
                                                               updt lmm 3/31/09



– If you need more information, use these O.S. resources –

Click Here: Manufacturer's Product Web Page
E-mail: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970


 
Postal Address:
O.S.
3002 N. APOLLO DRIVE, SUITE #1
CHAMPAIGN, IL 61822  








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