More muscle for .40 sized airplanes.
Increase displacement in your 40-size model the easy way: just drop in a 55AX engine!
You'll enjoy more horsepower for swinging bigger props ™ which means improved 3D, precision and sport flying. Best of all, there's no modifications required!
Mounts directly into the bolt pattern for a 46AX.
A diagonally-placed needle eliminates the need for a remote needle valve.
The 5-sided, angular head design looks great and significantly increases surface area for better cooling.
The Power BoxTM muffler has a generous sized chamber and larger sound baffle to significantly reduce exhaust noise without stealing power.
ABL (Advanced Bimetallic Liner) uses two O.S.-developed alloys to provide a durable barrier between the brass liner and piston.
Stock Number: 15612
Displacement: 0.545 cu in (9 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Practical rpm: 2,000-17,000
Output: 1.68 hp @ 16,000 rpm
14.3 oz (404 g) w/o muffler
18.52 oz (525 g) w/ muffler
Includes: #8 glow plug, E-3071 Power Box muffler & needle valve extension
Recommended Props: 11x6, 11x7, 12x6, 12x7, 12x8 & 13x6