O.S. .55AX ABL Glow Airplane Engine w/E3071 Muffler & 40K Carburetor

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The O.S. .55AX ABL Glow Airplane Engine is better than ever, with an improved carburetor and muffler. You get the same phenomenal power, with the convenience and safety of a rear angled needle valve on the carb and a squared off muffler for easier cowling installation. If you want .50 scale power that fits conveniently in .40 size planes, get the 55AX and get flying!

  • Comes with the E3071 muffler for quiet efficiency.
  • 40K carburetor has a diagonally placed needle valve so you don't need a remote needle valve.
  • Mounts directly into the bolt pattern for the O.S. Max .46 AXII
  • Advanced Bimetallic Liner (ABL) uses two alloys to provide a durable layer between the brass liner and piston.
  • Recommended prop sizes: 12x7, 12x8, 13x6, 13x7.
  • Angular head design offers increased surface area for better cooling
  • Two year limited warranty through Hobby Services beginning at date of purchase
  • Requires Aircraft blend fuel containing 5%-20% Nitromethane with at least 18% lubricant
  • Includes 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 screws
.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
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:

This product was added to our catalog on February 20, 2018

Danny Norman
Verified Owner
Tuesday, Oct 17 2023 (7 months ago)
O.S. .55AX ABL Glow Airplane Engine w/E3071 Muffler & 40K Carburetor
This is my second 55AX. Again hobbies had it for the best price so I needed 3 servos so I also purchased hitexc digital hi voltage. Everything was in stock and the shipment was very fast. Amain hobbies is now my go to for all future needs.
bryan glass
Verified Owner
Friday, Aug 18 2023 (9 months ago)
O.S. .55AX ABL Glow Airplane Engine w/E3071 Muffler & 40K Carburetor
Follow the directions, I did.
Runs great.
Lots of power for the size.