OS Motors 120AX Ring 70D Carb E5020 Muffler

This is the O.S. Max Two-Stroke 1.20AX Ringed Engine with Muffler.

FEATURES:
Design Application: Ideal for 3D, Precision and Sport flying
Installing Application: Mounts in very same space as the .91FX (real
mounting dimensions vary somewhat, see SPECIFICATIONS)
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 provided with engine, A5 (OSMG2693) will likewise work
Warranty: Two-year restricted

CONSISTS OF:
O.S. Max Two-Stroke 1.20AX Ringed Engine with E-5020 Power Box
    Muffler, #8 radiance plug, muffler adapter, prop washer and lock nut,
    needle valve extension cable,user's manual and decal sheet,
    2 muffler screws, 2 muffler extension bolts, 2 long muffler
    bolts.

REQUIRES:
Fuel: Two-Stroke with 20% lube and 5-20% nitromethane
Propeller: 15x10-12 or 16x8-10
Field Devices: Shine starter, fuel filter, fuel pump, fuel tubing

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: 3.1 PS, 3.06HP/9000 RPM
Weight of engine: 29.0oz (823g) with muffler
Weight of muffler: 7.074oz (219.2g) with 90° adapter set up
Weight of muffler: 7.907oz (245g) with extension set up
Crankshaft thread size: 5/16-24
Distance Between Mounting Holes Very 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 In between Installing Tabs: 2.6" (67mm)
Width of Crankcase Below Installing 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 Installing 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 ends up 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 consist of the muffler extension or the 90° adapter.
    At this time one would not be able to utilize the muffler extension and
    90° adapter at the very same time. The long muffler bolts are too long.