OS Engines

(image for) OS 46AX II with muffler

OS 46AX II with muffler

Simple, side-exhaust design. Power Box muffler features a squared-off shape for easier fits in more cowls. 40K carburetor has high- and low-speed...
(image for) OS 55AX inc muffler

OS 55AX inc muffler

OS 55AX 3070 Silencer Glow engine
(image for) OS 60GT 0utline

OS 60GT 0utline

Outline drawing
(image for) OS GT60

OS GT60

With the GT60, O.S. gives fliers of 50 cc models everything they want in a gasoline engine — durability, efficiency, easy operation and...
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