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Instruction Manuals:	Manual 1 (2 MB)
Tower Catalog Page:	200

              This is the O.S. Max .21 VZ-M Turbo Marine Engine.

FEATURES: Water intake mounted directly onto plug channels water to the center
            of cylinder head-the hottest part of the engine
          ABC cylinder construction-"A"luminum piston,"B"rass cylinder liner
            that is "C"hrome plated
          Liner porting and inner head designed specifically for high nitro
            boat competition
          Rotary type, big bore (10mm) 21D carburetor OSMG2479
          Water-cooled plug cap and 2K flywheel OSMG2647
          Rear exhaust

INCLUDES: O.S. Max .21 VZ-M Turbo Marine Engine with P7 turbo glow plug,
            flywheel, 21D carburetor and instruction manual

REQUIRES: Fuel: 10-30% nitro (see page 10 of manual for more information)
          Starter Belts for Boats, Use: AQUB9530 (15"), AQUB9531 (17")
            and AQUB9532 (19")

SPECS:    Displacement: 0.2 cu in (3.46cc)
          Bore: 0.65" (16.6mm)
          Stroke: 0.63" (16mm)
          Practical RPM Range: 3000-40,000
          Power Output: 2.5 hp @ 33,000 RPM
          Weight: 12oz (340g)

          Distance between mounting holes same side: 0.83" (21mm)
          Distance between mounting holes opposite side: 1.4" (37mm)
          Distance from exhaust center to mounting flange bottom: 1.1" (27.5mm)
          Width not including mounting flanges: 1.2" (30.8mm)
          Width including mounting flanges: 1.8" (45mm)
          Height bottom of crankcase to top of intake: 3.5" (89.1mm)
          Height bottom of mounting flanges to top of intake: 2.9" (73.6mm)
          Length from backplate to end of crankshaft: 3.4" (87mm)
          Length from backplate to flywheel: 2.5"  (65mm)
          Length from crankcase center to flywheel: 1.7" (44mm)

NEEDLE SETTINGS: -High Speed Needle: 1.5 turns OUT from fully closed position
                  per page 20 of manual
                 -Mixture Control Screw: Refer to sketch on page 17 of manual.
                   This screw can only be turned 90° either way.

                                                                    jxs 5/16/05
                                                needle settings updt tjt 080305
                                                                         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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