O.S. Engines, FS-91 SURPASS II W/O PUMP

Hobbies R Us

OSMG0896   O.S.   FS-91 II Surpass

TECH NOTES
                 This is the FS-91II Surpass 4-Stroke Engine.

 This engine does not use a choke valve OR use a return fuel line to the tank.
    THERE ARE NO TOOLS OR EXTRA NEEDLE VALVE AS STATED IN THE INSTRUCTIONS.

FEATURES: New rear-mounted, updraft 60P Carb, Intake Manifold, and Cover plate.
          Helix gear-driven camshaft supported by ball bearings.
          Ringed piston.
          Does Not use choke valve, but instead an electric starter to start.
          Grease-packed twin-sealed corrosion-resistant rear ball bearing.
          Two Year Warranty

INCLUDES: One Assembled Engine w/Carburetor.
          One type #F Glow Plug.
          One Muffler w/Manifold.
          One Set of Instructions and Decal.
            (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 a 18% lubricant content.
          Propeller (see SPECS)
          Starting and Field Equipment

SPECS:    Bore:                   27.7mm (1.09")
          Stroke:                 24.8mm (.976")
          Displacement:           14.95cc (0.912 cubic inch)
          Power Output:           1.6 BHP at 11,000 rpm
          Practical RPM Range:    2,000 - 12,000 rpm
          Crankshaft Thread Size: 5/16" x 24
          Weight: w/o muffler- 21.3 oz (603g)   with muffler- 23.0 oz (655g)
          Valve Clearance: Between .04mm and .1mm (or between .0015" and .004",
            measured between the valve tip and rocker arm)
          Length: 91.5mm (3.60") from backplate to front of drive washer.
          Width: 42.6mm (1.68") width of engine neglecting the mounting flanges
                52mm (2.05") distance between the mounting hole centers
          Height: 123mm (4.88")
          Suggested Prop's): Stunt planes: 11X11-12, 12X10-12, 13X9
            Scale models: 13.5X8, 14X7, 15X6, 16X6, (12X8 & 12.5X7-3 blade)
          Construction: Aluminum and Aluminum alloys

COMMENTS: A fuel tank of approximately 300cc capacity is suggested. This allows
            up to 12-13 minutes flying time.
          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.
          OS no longer includes the gauges, tools, and choke valve extension.
                                                                     
         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 AN R/C AIRPLANE ENGINE.  STARTING EQUIPMENT IS IN AIRPLANE KIT ACG.
INCLUDES: #F GLOW PLUG, MANIFOLD, MUFFLER
          (MAY USE A 2.75" SPINNER WITH THIS ENGINE)
MUST USE FUELS WITH 5%-15% NITROMETHANE AND 18% MINIMUM LUBRICANT CONTENT