This is the 120AX Special Ringed Aircraft Engine from O.S. Engines.

 

FEATURES:

High performance two stroke engine designed for sport and scale models

Compact size enables it to fit into most cowls

Crankshaft port timing was modified to increase power at high RPM

Velocity stack on carburetor adds acceleration at high RPM

0.1mm head gasket increases compression ratio for more power

1mm deeper machining to enlarge intake port for greater RPM

INCLUDES:120AX Special Ringed Aircraft Engine, #8 Glow Plug, 70D Carburetor with Velocity Stack, Instruction Manual, Prop Washer Nut and Needle Valve Extension Set

 

SPECS:

Displacement: 1.218 cu in (19.96 cc)

Bore: 1.197 (30.4mm)

Stroke: 1.083 (27.5mm)

Practical RPM Range: 1,800 - 9,500

Output: 3.35 PS (3.155 HP) @ 9,500 RPM

Crankshaft Size: UNF5/16-24