This is the O.S. Speed 21XZ-M Inboard Marine Engine.

       ****** Because of the competition nature of this engine,******
         ******it is NOT covered by the O.S. 2 Year Warranty.******

FEATURES: DLC (Diamond-like Coating) on crankshaft, plus tungsten weights to
            minimize vibration, and silicone inserts to smooth fuel mixture
          21D big-bore carburetor allows the use of high nitro fuel
          Laser engraved water cooled cylinder head

INCLUDES: 21XZ-M Speed Inboard Marine Engine with RP7 Glow Plug, Exhaust Seal
            Ring, Dust Cap, Head Gasket Set and Instruction Manual

REQUIRES: Fuel: Boat blend with 10-30% nitro content (20% recommended for break
            in)
          Exhaust system depending on application
          Glow starter and shore equipment

SPECS:    Displacement: 0.213 cu in (3.49 cc)
          Bore: 0.641" (16.27mm)
          Stroke: 0.661" (16.8mm)
          Practical RPM: 4,000-45,000
          Output: 2.76 hp @ 33,000 RPM
          Weight: 10.85 oz (307.5 g)
          Crankshaft Size: 1/4-28
          Carburetor Settings:
            Needle Valve; Turn clockwise until closed, open 1.5 turns, close
             10-15° after running hull through 1 tank of fuel, repeat until
             approximately 2 liters of fuel have been consumed
            Mixture Control Valve; After getting needle valve adjusted, turn
             clockwise or counterclockwise in 10° increments to reduce
             excessive smoke (too rich) or to reduce speeding up momentarily
             (too lean)

          Distance between mounting hole centers same side: 0.83" (21mm)
          Distance between mounting hole centers opposite side: 1.4" (37mm)
          Distance/mounting tab to center of exhaust: 1.1" (28.5mm)
          Distance/mounting tab to center of cooling inlet: 2.2" (55.05mm)
          Distance from exhaust center to mounting flange bottom:
          Width not including mounting flanges: 1.2" (31.6mm)
          Width including mounting flanges: 1.8" (45mm)
          Height bottom of crankcase to top of intake: 3.1" (78mm)
          Length from Front Bearing/end of Crankshaft: 0.87" (22mm)
          Length from Front Bearing/center of Crankcase: 1.7" (44mm)
          Length from Center of Crankcase/end of Crankshaft: 2.6" (66mm)

                                                                   jxs 12/03/12
                                                                         ir/jxs