OS Engines

O.S. 120AX Special Ringed

120AX Special Ringed

"Special" features give this 120AX even more power!


Experience up to 8% more power in the same displacement with the 120AX Special! High-rpm "tweaks" include modified crankshaft port timing and a Velocity Stack on the carburetor. A 0.004" (0.1 mm) head gasket increases compression ratio for more power. For optimal results, pair it with the E-5020 Power Box Muffler!

Specifications
Displacement: 1.2 cu in (20 cc) Output: 3.35 hp @ 9,500 rpm RPM Range: 1,800-9,500 Bore: 1.2 in (30.4 mm) Stroke: 1.1 in (27.5 mm) Requirements: 2-stroke glow fuel with 5-20% nitromethane content and 20% lubricant content, 15x10-12 or 16x8-10 propeller, Field equipment



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