| Features
O.S. Engines 120AX Ring 70D
Carburetor No Muffler OSMG0651
 Features
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O.S. Engines 120AX Ring 70D
Carburetor No Muffler OSMG0651
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Model Application: Ideal for
3D, Precision and Sport flying
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Mounting Application: Mounts
in same space as the .91FX (actual mounting dimensions vary slightly, see
SPECS)
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Internal Construction: Steel
piston ring and liner, aluminum piston
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Carburetor: 70D with rearward
angled needle valve for safety
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Glowplug: O.S. #8 supplied
with engine, A5 (OSMG2693) will also work
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Warranty: Two-year limited
Specifications
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Displacement: 1.218 cu in
(19.96cc)
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Bore: 1.197" (30.4mm)
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Stroke: 1.083" (27.5mm)
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Practical RPM: 1,800 - 9,500
RPM
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Power Output: 3.1ps/9000 RPM
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Weight of engine: 22.82oz
(647g) without muffler,extension or adaptor
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Weight of muffler: 7.074oz
(219.2g) with 90° adapter installed
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Weight of muffler: 7.907oz
(245g) with extension installed
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Crankshaft thread size:
5/16-24
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Distance Between Mounting
Holes Same Side: 0.98" (25mm)
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Distance Between Mounting
Holes Opposite Side: 2.3" (58mm)
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Distance Center of Crankcase
to End of Crankshaft: 4.3" (109.5mm)
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Distance Center of Crankcase
to Drive Hub: 2.7" (69.8mm)
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Width Between Mounting Tabs:
2.6" (67mm)
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Width of Crankcase Below
Mounting Tabs: 1.8" (46.5)
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Length from Backplate to End
of Crankshaft: 5.5" (139.9mm)
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Length from Backplate to Drive
Hub: 3.9" (100.2mm)
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Height/Bottom of Crankcase to
Top of Cylinder Head: 4.3" (109.2mm)
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Height/Bottom of Mounting
Tabs/Top of Cylinder Head: 3.4" (85.7mm)
Package Contents
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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
Requirements
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Fuel: Two-Stroke with 20%
lubricant and 5-20% nitromethane
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Muffler: E-5020 "Power Box"
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Propeller: 15x10-12 or 16x8-10
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Field Equipment: Glow starter,
fuel filter, fuel pump, fuel tubing
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