OS Engines 55AX Engine
[55AX]

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 Box 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.

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, E-3010 muffler
Recommended Props: 12x7, 12x8, 13x6, 13x7
15610 .55 AX Parts Listing