O.S AX / FX Series Engines

The state-of-the-art in sport/competition engines!

• All FX engines come with remote needle valve - the feature most asked for!
• A longer crankshaft provides more secure attachment for spinner, prop and nut
• Dual ball bearing construction adds durability and longevity
• Semi-square head shape creates more fin area to increase cooling capacity
•  Each engine comes with a high-performance carburetor and muffler with adjustable exhaust direction and built-in pressure tap
• .61 FX & .91 FX feature a remote needle valve that can be positioned two ways, to help you avoid cowl modification and preserve your plane's scale lines; 1.60 FX remote needle can be mounted three ways

OS AX / FX Series

	Download OS .46 AX Manual   The OS .46AX replacement for the high-performance .46 FX, it’s no wonder that the OS .46 AX shares many of its features.

	Download OS .40 FX, .46 FX, .61 FX, .91 FX Manual   OS 61FX - "Once started, the .61 FX has a nice slow and reliable idle, and then it will accelerate quickly and cleanly to peak RPM"

	Download OS .40 FX, .46 FX, .61 FX, .91 FX Manual   OS 91FX - Designed for sport, but engineered for excellence, the .91 FX offers the power and user-friendly features of other FX Series engines in a displacement fit for large-scale aircraft.

	[OS19218 OS 120AX] motor w/o muffler - ideal for 3D, Precision and Sport flying

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