As the replacement for the high-performance .46 FX, it’s no wonder that the .46 AX shares many of its features. The raw power. A remote needle valve. Mounting bolt patterns. A balanced “D”-cut crankshaft supported by dual bearings. CNC-machining for the piston and other parts. And the same exclusive ABL cylinder liner that has made FX reliability a byword.
But all the same, the .46 AX is a different — and better — engine. Why? Because times change and technology advances. And because O.S. uses the best of both to make a good engine a better engine.
Features the .46 FX’s durable ABL (Advanced Bimetallic Liner) plating, as well as a new design that automatically centers, levels and seats the head during re-replacement. Head snugs down with only four screws — not six.
Subtly tapered low-end needle eliminates surging at transition, ensuring exceptionally smooth, consistent throttle control from idle to top speed.
Redesigned liner ports and a ball-milled inlet port minimize turbulence during fuel/air mixing, making combustion and power output more predictable.
New high-speed needle bracket simplifies horizontal/vertical mounting — and can be replaced in just minutes.
Minimizes vibration-induced “creep” and re-sets with a ratchet spring on the high-speed needle and O-ring seals on both needles. A simple rotor guide screw replaces the throttle stop screw — and eliminates spring-related movement.
Includes a new low-noise E-3010 muffler and 2-year warranty protection.
Includes a lock nut and longer crankshaft with more thread length, for better prop nut engagement and greater pilot safety.
With ABL™ Technology! ABL (Advanced Bimetallic Liner) uses two O.S.-developed alloys to provide a durable barrier between the brass liner and the piston.
Switching the needle from a horizontal to a vertical orientation requires only a couple of minutes. A composite needle housing insulates the brass sleeve and prevents heat-related changes to needle settings.
A generously sized chamber and larger sound baffle significantly reduce exhaust noise. Rotating the exhaust port provides easy finish protection — adding an exhaust deflector provides even more.
SPECIFICATIONS:
Stock Number: OSMG0547
Displacement: 0.455 cu in (7.5cc)
Bore: 0.866 in (22.0mm)
Stroke: 0.772 in (19.6mm)
Output: 1.65 bhp @16,000 rpm
RPM Range: 2,000-17,000
Weight w/muffler: 17.2 oz (489g)
Includes: #A3 glow plug, E-3010 muffler
Requires: glow fuel, prop
Suggested prop sizes: 10.5x6, 11x6-8, 12x6-7