STOCK# - OSMG0930 MFG# - 35530
New and unused. In the original manufacturer packaging. This ships FREE within the U.S. when using ground service. If ordering it you may add more items to your order without incurring any shipping charges if shipped within the U.S. using ground service.

   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 the fact that this series gained 30  more power than the
previous FS series.

FEATURES: 30  larger Intake Valves than the FS series
          Ringed Piston
          Rear-mounted updraft Carburetor
          Helix Gear-Driven Camshaft
          Ball Bearing-Supported Camshaft and Crankshaft
          Covered under 2-YEAR WARRANTY

INCLUDES: One Assembled FS-120 Surpass w/Carb and No Pump
          One #F Glow Plug
          One Exhaust Header
          One Exhaust Muffler
          One Choke Valve Extension
          One Set of Instructions  Poster  and Decals
            (Wrenches  Choke Valve Extension  and Mounting Template Are 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 an 18  lubricant content.
          Starting and Field Equipment
          Propeller (see SPECS)

SPECS:    Bore:     31mm (1.22 )
          Stroke: 27.5mm (1.08 )
          Power Output: 1.9 PS  1.87HP at 11 000 RPM
          Weight-Without Muffler: 30.5oz (864g)
          Weight-With Muffler: 33.3oz (944g)
          Practical RPM Range: 2 000 - 11 000 RPM
          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: 104mm (4.09 ) from backplate to the front of drive washer
          Width: 47mm (1.85 ) width of engine neglecting the mounting flanges
                 58mm (2.28 ) distance between the mounting hole centers
          Height: 138.5mm (5.45 )
          Suggested Prop(s): 13x11  13x12  14x10  14x11  15x8  16x6  16x7  17x6
          Construction: Aluminum and Aluminum alloys

          Needle Settings: High Speed: 2.5 - 3 turns out from fully closed
                           Low Speed:  Edge of larger sleeve centered  looking
                                       down the neck of the carb

COMMENTS: Some differences between 4-Stroke and 2-Stroke engines.
            4-strokes are quieter.
            4-strokes get better fuel economy.
            2-strokes generate more RPM (11 000-13 000 RPM with prop
             while 4-strokes rev to around 9 500 RPM)
            4-strokes generate much more torque and will swing a larger prop.
            4-strokes have a realistic sound  like a real aircraft engine.
                                                                    JBN 7/20/93
                                                                          ir/jl
                                                               updt lmm 3/31/09

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