55AX O.S. Engine  [OSMG0556]

Increase displacement inside 40-size model the straightforward method: just fall in a 55AX engine! You'll enjoy more horsepower for moving bigger props ?X meaning improved 3D, precision and sport flying. Furthermore, there's no modifications needed!

Mounts into the bolt pattern for a 46AX.

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

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

Specs:

• Stock 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