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OS Engines

O.S. 120AX Engines

O.S. 120AX

Perfect for 3D, precision and sport flying!

O.S. Two Year WarrantyAdmit it: if you could ratchet up horsepower without having to increase the mounting space, you’d probably jump at the chance. Well, here it is. The 120AX boasts 25% more displacement than a .91 (think of the bigger props you can swing!) — and bolts into the same space, with almost no extra weight.
And that’s not all. The 120AX’s innovative Power Box muffler offers mounting versatility that translates into value. Plus, the angled heat sink head not only looks sharp, it adds more surface area, for better cooling. Here's a golden opportunity to boost your airplane's flying capabilities — with almost no modification!

Displacement: 1.20 cu in (20 cc) Bore: 1.197 in (30.4 mm) Stroke: 1.083 in (27.5 mm) Practical rpm range: 1800-9500 Power Output: 3.1 hp @ 9000 rpm Weight: w/Muffler 29.0 oz (823g) w/o Muffler 22.8 oz (647g) Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box™ muffler w/two adapters Recommended Props: 14 x 10 APC, 15 x 6 APC

120AX w/Muffler
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120AX w/o Muffler
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Add To Wish List Tech Notes Accessories Needed

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