Product description

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
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 C...