This is the Magnum XL91 RFS Four-Stroke Aircraft Engine
                          with Blue Rocker Cover.

FEATURES: Aluminum piston, iron piston ring and steel cylinder sleeve for long
            life and high power output
          Dual ball bearing supported crankshaft and camshaft
          Dual needle valve carburetor insures precise fuel/airflow metering
          High-flow muffler
          One year limited warranty through manufacturer

INCLUDES: Magnum XL91 RFS Four-Stroke Engine with Muffler, instruction manual
            and parts list

REQUIRES: Fuel: For break-in, 10% 2-stroke airplane blend
                For normal use, 15% 4-stroke airplane blend
          Glow Plug: 4-stroke "hot" type
          Break-in Propeller: 14x6
          Glow starter, fuel tubing and field equipment

SPECS:    Displacement: 0.91 cu in (15cc)
          Bore: 1.09" (27.7mm)
          Stroke: 0.97" (24.8mm)
          Crankshaft Diameter: 5/16"
          Practical RPM: 2,000 - 12,000
          Weight with Muffler: 22.4 oz (635g)
                 without Muffler: 20.7oz (587g)
          Distance Between Mounting Holes Same Side: 1.02" (26mm)
          Distance Between Mounting Holes Opposite Side: 2.04" (52mm)
          Width at Mounting Tabs: 2.4" (60mm)
          Height from Bottom of Mounting Tabs to Rocker Cover: 4" (101mm)
          Height from Bottom of Crankcase to Rocker Cover: 4.7" (120mm)
          Distance from Backplate to Front Bearing: 2.9" (74mm)
          Distance from Backplate to end of Crankshaft: 4.9" (125mm)

          High Speed Needle: Turn in completely then back out 2-1/2 turns
          Low Speed Needle: Do NOT adjust until engine is broken in. Hold carb
            barrel open, turn needle screw counter-clockwise until it stops
            then turn in clockwise 4-1/4 turns-this is the factory setting

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
            4-strokes generate more torque and will swing a larger prop.
            4-strokes have a realistic sound; like a real aircraft engine.

                                                                    jxs 7/02/09
                                                                         ir/jxs