This is a FS-40 Surpass Four-Stroke Model Aircraft Glow Engine.

FEATURES: Rear-mounted updraft carburetor
          30% larger intake valves than the original FS series
          Helix gear-driven camshaft
          Ringed piston
          Ball bearing-supported camshaft and crankshaft
          Two year warranty

INCLUDES: One Assembled engine w/Carb and #F Plug
          One Muffler w/Manifold
          One Set of Instructions, O.S. Poster, 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 castor/synthetic 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 due to its 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:         21.2mm (.835")
          Stoke:        18.4mm (.724")
          Power Output: .65 BHP at 12,000 rpm
          Weight- w/o muffler: 12.5 oz w/muffler: 12.74 oz
          Practical rpm Range: 2,200 - 12,000 rpm
          Crankshaft Thread Size: 1/4-28
          Valve Clearance: Between .04mm and .1mm (.0015" and .004")
            Measured between the valve tip and rocker arm.
          Length: 77.5mm(3.05") from backplate to the front of the drive washer
          Width: 32.5mm (1.28") width of engine neglecting the mounting flanges
                   42mm (1.65") side-to-side mounting holes on-center
          Height: 98mm (3.85")
          Suggested Prop(s): 10X7.5, 11X6, 12X5, 12X6 (2-blade), 9X7 (3-blade)
          Construction: Aluminum and aluminum alloys

COMMENTS: The Surpass series is the 2nd series of 4-stroke engines. The first
            FS series was discontinued and replaced by the Surpass series
            around 1987. "Surpass" refers to this series gaining 30% more
            power than the previous FS series engines.
          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.
                                                                          ir/jl