This is the Thunder Tiger Pro .12BK 2-Stroke Model Car Engine.

FEATURES: Side exhaust
          Built-in hexagonal shaft starting system (shaft not included)
          CNC machined components
          ABC piston and sleeve "A"luminum piston, "B"rass cylinder liner that
            is "C"hrome plated
          Hyperutectic machined Al-Si ringed piston
          Dual ball bearing-supported SG crankshaft
          Two needle valve rotary carburetor
          Three year limited warranty through Hobby Services beginning at date
            of purchase

INCLUDES: Thunder Tiger Pro .12BK Model Car Engine with carburetor, air filter
            with foam element, decals and instruction manual

REQUIRES: Fuel: 20% lubricant and 10-30% nitro content, synthetic/castor blend
            lubricant recommended (do not use more than 10% nitro content for
            break in)
          Glow Plug: Long type recommended such as the OS #8
          Glow starter, plug wrench and field equipment

SPECS:    Displacement: .129 cu in (2.11cc)
          Bore: 0.545" (13.85mm)
          Stroke: 0.551" (14.0mm)
          Practical RPM: 3,000 - 30,000
          Output: 0.60 HP @ 29,000 rpm
          Weight: 8.28oz (234g)
            Carburetor Settings-NOTE carburetor is preset from the factory and
            requires only small adjustments
          Needle Valve: 2-1/2 - 3 turns counterclockwise from closed
          Air Bleed Screw: After setting needle valve, 1/8 turn clockwise if
            mixture is too rich or 1/8 turn counter-clockwise if mixture is too
            lean

          Height from Mounting Tab Bottom/Top of Cylinder Head: 2.7" (68.3mm)
          Height from Crankcase Bottom to Top of Cylinder Head: 3.1" (80mm)
          Width at Mounting Tabs: 1.6" (39.5mm)
          Width of Crankcase below Mounting Tabs: 1" (25.4mm)
          Center of Mounting Holes Same Side: 0.43" (11mm)
          Center of Mounting Holes Opposite Side: 1.2" (32mm)
          Center of Crankcase to Front Bearing: 1.3" (34.5mm)
          Distance from Shaft Starter to Front Bearing: 2.6" (66mm)

                                                                   jxs 10/21/10
                                                                         ir/jxs