Click for parts for this item

 Eligible: Yours for 3 Easy Pay payments of $89.99
Select Easy Pay Plan during checkout.

View Larger Picture

On-line Videos:	Video 1 (17.2 MB)
Instruction Manuals:	Manual 1 (2.7 MB)
Tower Catalog Page:	195
E-mail This Page To A Friend

      This is the O.S. Max Two-Stroke 1.20AX Ringed Engine with 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)
          Internal Construction: Steel piston ring and liner, aluminum piston
          Muffler: E-5020 "Power Box" with extension and 90° adapters
          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 E-5020 Power Box
            Muffler, #8 glow plug, muffler adapter, prop washer and lock nut,
            needle valve extension cable,instruction manual and decal sheet,
            two muffler screws, two muffler extension bolts, two long muffler
            bolts.

REQUIRES: Fuel: Two-Stroke with 20% lubricant and 5-20% nitromethane
          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)
          Practical RPM: 1,800 - 9,500 RPM
          Power Output: 3.1ps/9000 RPM
          Weight of engine: 22.82oz (647g) without muffler,extension or adaptor
          Weight of muffler: 7.074oz (219.2g) with 90° adapter installed
          Weight of muffler: 7.907oz (245g) with extension installed
          Crankshaft thread size: 5/16-24
          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)
          Distance center to center of muffler mounting holes: 48mm (1.89")

          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 without muffler, order OSMG0651. The version without the
            muffler does not include the muffler extension or the 90° adapter.
            At this time one would not be able to use the muffler extension and
            90° adapter at the same time. The long muffler bolts are too long.

                                                                   jxs 10/25/05
                                                           Updated JBM 12-20-05
                                                               updt WM 11/29/05
                                                                         ir/jxs
                                                               updt lmm 3/30/09



– 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  








Click here for Units of Measure Conversion Calculators