O.S. Engine 55AX  [OSMG0556]

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 ?X 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: 12x7, 12x8, 13x6, 13x7