O.S. Engine 55AX  [OSMG0556]

Increase displacement inside 40-size model the simple method: simply fall in a 55AX engine! You'll enjoy more horsepower for moving bigger props ?X this implies enhanced 3D, precision and sport flying. In addition, there's no changes needed!

Mounts in the bolt pattern for a 46AX.

A diagonally-placed needle eliminates the necessity for a remote needle valve.

The 5-sided, angular head design appears great and specially increases area area for better cooling.

Specs:

• Inventory quantity: 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
• Body fat: 14.3 oz (404 g)
• Includes: #8 radiance plug, 40J carburetor, energy Box E-3070 muffler
• Suggested Props: 12x7, 12x8, 13x6, 13x7