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           This is the O.S. Max 21TM Engine with T-Maxx Manifold.
         Direct fit for the 2.5 and 3.3 Traxxas T-Maxx monster trucks.

                    *** TWO YEAR LIMITED WARRANTY ***

FEATURES: Adapts perfectly to the Traxxas E-Z Start or pull-start systems with
            no modifications
          Included manifold is specially designed to fit directly into the
            T-Maxx
          Traxxas' clutch assembly bolts right to the crankshaft with no
            modifications
          Oversized cooling fins on crankcase helps to keep engine cooler
          Three needle slide valve carburetor with fins to help cool the fuel
            as it enters the engine
          High-performance long reach O.S. glow plug suitable for off-road
            applications that require constantly varying speed
          Two year limited warranty

INCLUDES: One O.S. Max 21TM Engine with T-Maxx Manifold, LC3 glow plug, 11K
            slide valve carburetor, exhaust gasket, manifold spring and
            instruction manual

REQUIRES: Installing in vehicle
          Air filter

SPECS:    Displacement: 0.21 cu in (3.4cc)
          Bore: 0.669" (17mm)
          Stroke: 0.590" (15mm)
          Practical RPM: 3,000 - 35,000 RPM
          Output: 1.8 ps / 29,000 RPM
          Weight: 8.57oz (243g)

          Distance between mounting hole centers same side:      0.43" (11mm)
          Distance between mounting hole centers opposite side:  1.2" (31.4mm)
          Distance from end of crankshaft to drive washer:   1.03" (26.3mm)
          Distance from center of engine to front bearing:   1.4" (34.8mm)
          Width of mounting flanges:                             1.5" (39mm)
          Length of exhaust flange:                              0.24" (6mm)
          Height/backplate mount to top of cylinder head:        3.3" (85.3mm)

COMMENTS: Needle Settings:
           - High Speed Needle (Needle Valve) 2-1/2 turns out from close.
           To break-in close approximately 30° after running one tank
           of fuel through vehicle, repeat five times
           - Mid Range Needle (Mixture Control Valve) Screw head is exactly
           1/2 turn in from flush with the carb body
           - Low Speed Needle (Metering Needle) Turn 30° clockwise to lean
           mixture or counter-clockwise to richen mixture

                                                                    jxs 8/31/07
                                                                         ir/jxs



– If you need more information, use these O.S. resources –

Click Here: Manufacturer's Product Web Page
E-mail: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970


 
Postal Address:
O.S.
3002 N. APOLLO DRIVE, SUITE #1
CHAMPAIGN, IL 61822  








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