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Tower Catalog Page:	195
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    This is the O.S. Max Two-Stroke 1.20AX Ringed Engine without Muffler.

FEATURES: Model Application: Ideal for 3D, Precision and Sport flying
          Mounting Application: Mounts in same space as the .91FX (actual
             mounting dimensions vary slightly, see SPECS)
          Construction: Steel piston ring and liner, aluminum piston
          Carburetor: 70D with rearward angled needle valve for safety
          Glowplug: O.S. #8 supplied with engine, A5 (OSMG2693) will also work
          Warranty: Two-year limited

INCLUDES: O.S. Max Two-Stroke 1.20AX Ringed Engine with  #8 glow plug, prop
            washer and nut, needle valve extension set, instruction manual
            and decal set

REQUIRES: Fuel: Two-Stroke with 20% lubricant and 5-20% nitromethane
          Muffler: E-5020 "Power Box"
          Propeller: 15x10-12 or 16x8-10
          Field Equipment: Glow starter, fuel filter, fuel pump, fuel tubing

SPECS:    Displacement: 1.218 cu in (19.96cc)
          Bore: 1.197" (30.4mm)
          Stroke: 1.083" (27.5mm)
          Crankshaft thread size: 5/16-24
          Practical RPM: 1,800 - 9,500 RPM
          Power Output: 3.1ps/9000 RPM
          Weight: 22.82oz  (647g)
                   7.074oz (219.2g) with 90° adapter installed
                   7.907oz (245g) with extension installed

          Distance Between Mounting Holes Same Side: 0.98" (25mm)
          Distance Between Mounting Holes Opposite Side: 2.3" (58mm)
          Distance Center of Crankcase to End of Crankshaft: 4.3" (109.5mm)
          Distance Center of Crankcase to Drive Hub: 2.7" (69.8mm)
          Width Between Mounting Tabs: 2.6" (67mm)
          Width of Crankcase Below Mounting Tabs: 1.8" (46.5)
          Length from Backplate to End of Crankshaft: 5.5" (139.9mm)
          Length from Backplate to Drive Hub: 3.9" (100.2mm)
          Height/Bottom of Crankcase to Top of Cylinder Head: 4.3" (109.2mm)
          Height/Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (85.7mm)

          Needle Settings: High Speed: 2 - 2.5 turns out from fully closed
                           Low Speed:  3/4 turn out from fully closed with the
                                       throttle fully closed

COMMENTS: For version with muffler, order OSMG0650.

                                                                   jxs 10/25/05
                                                           Updated JBM 12-20-05
                                                             Updated JBM 3-7-06
                                                                         ir/jxs
                                                               updt lmm 3/31/09



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

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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