O.S. Engine 55AX  [OSMG0556]

Increase displacement within 40-size model the simple method: just drop in a 55AX motor! You'll enjoy more horsepower for moving larger props ?X which means improved 3D, accuracy and sport flying. On top of that, there's no modifications needed!

Mounts directly into 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 dramatically increases surface area for better cooling.

Requirements:

• 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
• Production: 1.75 hp @ 16,000 rpm
• Body weight: 14.3 oz (404 g)
• Includes: #8 glow plug, 40J carburetor, Power Box E-3070 muffler
• Suggested Props: 12x7, 12x8, 13x6, 13x7