O.S. 55AX 2 Stroke engine for RC Plane

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More muscle for mid-sized planes!

Put more power in your .40-size model the easy way: just drop in a 55AX engine. It has the same bolt pattern as the 46AX for no-mod retrofits, but it also has the added displacement it needs to swing bigger props — and everything you need for better 3D, precision and sport flying.

  • Direct, bolt-in replacement for the 46AX.
  • A diagonally-placed needle offers more pilot safety and eliminates the need for a remote needle valve.
  • The 6-sided, angular head offers unique looks and significantly increases surface area for better cooling.


osmg0556-inset-1.jpg osmg0556-inset-2.jpg
The 55AX is equipped with a Power Box E-3071 muffler. A generously sized sound chamber and large baffle helps it significantly reduce exhaust noise without reducing power. The exclusive ABL (Advanced Bimetallic Liner) uses two O.S.-developed alloys for long-lasting, low-friction operation


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: 1.68 hp @ 16,000 rpm
    14.3 oz (404 g) w/o muffler
    18.52 oz (525 g) w/ muffler
Includes: #8 glow plug, E-3071 Power Box muffler & needle valve extension
Recommended props: 11x6, 11x7, 12x6, 12x7, 12x8 & 13x6


SKU OSM15612
Barcode # 4531028022812
Brand OS
Shipping Weight 1.0000kg
Shipping Width 0.200m
Shipping Height 0.300m
Shipping Length 0.250m
Shipping Cubic 0.015000000m3

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