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OS 55Ax Engine With Muffler


SKU OSM15612
Free Shipping
  • Description
  • This is the O.S. Max .55 AX ABL Aircraft Engine
    with the E3071 Muffler.


    Same mounting dimensions as the O.S. Max .46 AXII
    Advanced Bi-Metallic Liner process uses a double layer of plating
    material rather than one thick layer. This helps the metal bond to
    the cylinder and makes the plating more durable. Also, the plating
    process is more consistent, resulting in a more precise fit between
    piston and sleeve for better compression and longer life.
    Angular head design offers increased surface area for better cooling
    40K Carburetor with diagonally placed needle valve eliminating remote
    needle valve placement
    Two year limited warranty through Hobby Services beginning at date of


    O.S. Max 55 AX ABL Aircraft Engine with E-3071 Muffler, 40K
    carburetor, #8 glow plug, illustrated instruction manual, 3.5"
    (90mm) long needle valve, extension cable and two 3x35mm muffler


    Aircraft blend fuel containing 5%-20% Nitromethane with at least 18%


    Displacement: .545 cu in (8.93cc)
    Bore: .91" (23mm)
    Stroke: .85" (21.5mm)
    Practical RPM: 2,000-17,000
    Power Output: 1.75 PS, 1.68 HP/16,000 RPM
    Weight: 14.29oz (404g) w/o muffler
    w/ muffler
    Recommended Props: 11x6, 11x7, 12x6, 12x7, 13x6
    Crankshaft thread size: 1/4-28
    Distance from center of engine to drive hub: 2.4" (60.4mm)
    Distance from center of engine to end of crankshaft: 4.4" (112.6mm)
    Distance/crankshaft center to muffler exhaust outlet: 1.4" (36.7mm)
    Height from crankcase bottom to top of cylinder head: 3.6" (91.1mm)
    Height/crankshaft center to top of cylinder head: 2.8" (72.6mm)
    Width including mounting tabs: 2" (51mm)
    Width not including mounting tabs: 1.4" (36mm)
    Width between mounting holes same side: .69" (17.5mm)
    Width between mounting holes opposite side: 1.7" (44mm)
    Diameter of muffler body: 1.5" (38mm)
    Angle of muffler in relation to engine: