O.S. 120AX w/Muffler OSMG0650

Features

• O.S. 120AX w/Muffler OSMG0650

• 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

Specifications

• 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")

Package Contents

• 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.

Requirements

• 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

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.