This is the 12XZ Speed Spec III Glow Powered Touring Car Engine
                              from O.S. Engines.

     ****** Because of the expressed racing nature of this engine, ******
     ******     it is NOT covered by the O.S. 2 Year Warranty      ******
     ******               per page 8 of manual.                    ******

FEATURES: Redesigned head button for better performance and improved
            acceleration
          Tapered surface on piston with a depression that works with the head
            button to maximize combustion and power
          Slightly thicker cylinder liner with redesigned ports for better air/
            fuel flow that boosts mid-speed torque and extends fuel mileage
          Redesigned 12F2 (B) slide valve carburetor delivers sharp
            acceleration and instant throttle response with easier more
            reliable tuning
          DLC coating on crankshaft with pressed in Tungsten weights and
            ceramic rear ball bearing
          Outer head sits 0.24" (6mm) lower over the crankcase decreasing the
            engine's weight, lowering the CG and aiding in cooling

INCLUDES: 12XZ Speed Spec III Engine, with 12F2(B) Slide Valve Carburetor,
            RP6 Glow Plug, Exhaust Seal Ring, Dust Cap Set, 5.5mm Red Carb
            Reducer and Instruction Manual

REQUIRES: Fuel: 10-30% nitro content, 20% recommended for break-in
          Exhaust System: Depending on vehicle
          Air cleaner assembly, glow starter and track equipment

SPECS:    Displacement: 0.128 cu in (2.1cc)
          Bore: 0.543" (13.8mm)
          Stroke: 0.55" (14.0mm)
          Practical RPM Range: 5,000-44,000
          Output: 1.73hp @ 35,000 RPM
          Weight: 7.9oz (225g)
          Height from crankcase bottom to top of cylinder head: 3.2" (82mm)
          Height/crankshaft center to top of cylinder head: 2.7" (68.7mm)
          Width including mounting tabs: 1.5" (39mm)
          Crankcaase width below mounting tabs: 1.02" (26mm)
          Width between mounting hole centers same side: 0.43" (11mm)
          Width between mounting hole centers opposite side: 1.2" (31.4mm)
          Mounting hole diameter: 0.12" (3mm)
          Cylinder head diameter: 1.9" (49mm)
          Length from end of crankshaft to front bearing: 1.2" (29.5mm)
          Length from backplate to front bearing: 2.1"  (52.6mm)
          Length from backplate to end of crankshaft: 3.2" (82.1mm)
          Crankshaft Size: 1/4-28
          Carburetor Settings:
            Needle Valve, 2.5 turns open from fully closed
            Throttle Stop Screw, 0.5mm open
            Mixture Control Valve, follow break-in procedure and turn
             clockwise 15° to lean mixture or counterclockwise 15° to richen
             mixture
           (Make adjustments only in small increments. Refer to manual for
             full break-in and carburetor adjustment instructions)

COMMENTS: Some notes on Slide Valve and Rotary Carburetors:
          Rotary Carbs offer a larger response in the middle of the power
            band. This works well for off-road applications when throttle
            response must be varied.
          Slide Valve Carbs provide greater response at the beginning and end
            of the power band. This works well for on-road and racing
            applications for fast take-offs and high speed.

                                                                   jxs 12/31/12
                                                                         ir/jxs