This is the O.S. Max .55 AX Aircraft Engine with Muffler. 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.

Includes: O.S. Max 55 AX ABL Aircraft Engine with E-3070 Muffler, 40J carburetor, #8 glow plug, illustrated instruction manual, 3.5" (90mm) long needle valve extension cable and two 3x35mm muffler screws

The large-chambered muffler reduces sound without reducing power.

The 40K carburetor includes a diagonally placed needle valve so there's no need for a remote needle valve.

 

What you need

  • Aircraft blend fuel containing 5%-20% Nitromethane with at least 18% lubricant
  • Comes with the E3071 muffler for quiet efficiency
  • Same mounting dimensions as the O.S. Max .46 AX
  • Power Box positionable muffler
  • Angular head design offers increased surface area for better cooling
  • 40K Carburetor with diagonally placed needle valve eliminating remot needle valve placement
  • Advanced Bi-Metallic Liner process uses a double layer of plating material rather than one thick layer
  • Plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression and longer life
  • Recommended prop sizes: 12x7, 12x8, 13x6, 13x7
Displacement .545 cu in (8.93cc) Bore .906" (23mm) Stroke .846" (21.5mm) Practical RPM 2,000-17,000 Power Output 1.75 PS, 1.68 HP/16,000 RPM Weight w/o muffler 14.29oz (405g) Weight w/ muffler 18.52oz (525g) Recommended Props 12x7-8, 13x6-7 Crankshaft thread size 1/4-28 Distance/remote needle to end of crankshaft 4.7" (119.4mm) Distance from center of engine to drive hub 2.4" (60.4mm) Distance from center of engine to end of crankshaft 3.4" (87.6mm) Distance/crankshaft center to muffler exhaust outlet 3.9" (100.5mm) Height from crankcase bottom to top of cylinder head 3.3" (85.2mm) Height/crankshaft center to top of cylinder head 2.6" (67.4mm) Width including mounting tabs 2" (50.8mm) Width not including mounting tabs 1.4" (35.6mm) Width between mounting holes same side .69" (17.5mm) Width between mounting holes opposite side 1.7" (43.2mm) Diameter of muffler body 1.5" (38.1mm) Angle of muffler in relation to engine 4° High Speed Needle 2 turns out from fully closed Low Speed Needle 3mm gap between the needle and spray bar at full throttle (looking down the neck of the carb)
SKU 4531028022812
Brand OS
Shipping Width 0.130m
Shipping Height 0.100m
Shipping Length 0.160m

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