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46AX [40G]W/E-3070 SILENCER | 15490


Product Overview

As the replacement for the high-performance 46FX, 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 46AX 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 46FX'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 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-3070 muffler and 2-year limited warranty protection.


  • Includes a lock nut and longer crankshaft with more thread length, for better prop nut engagement and greater pilot safety.

Technical Data

  • Displacement: 0.455 cu in (7.5 cc)
  • Bore: 0.866 in (22.0 mm)
  • Stroke: 0.772 in (19.6 mm)
  • RPM Range: 2,000-17,000
  • Output: 1.63 hp @ 16,000 rpm
  • Weight:
        13.2 oz (375 g) without muffler
        17.1 oz (486 g) with muffler
  • Includes: #A3 glow plug, Power Box E-3010 muffler

Recommended Props

  • 10x6, 10x7, 11x6, 12x6.
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