O.S. Airplane Engine .46 AX ABL (JAPAN)

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.