O.S. Engines 55AX ABL w/Muffer View larger

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O.S. Engines 55AX ABL w/Muffer


New product

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.

More details

$210.00 tax excl.

    • 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.
    • 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
    • Weight:

        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


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