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.
SPECIFICATIONS:
Stock Number: OSMG0556
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: 1.75 hp @ 16,000 rpm
Weight: 14.3 oz (404 g)
Includes: #8 glow plug, 40J carburetor, Power Box E-3070 muffler
Recommended Props: 12×7, 12×8, 13×6, 13×7