55AX ABL

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.

O.S. 2-year Limited Warranty


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.
  • Specifications
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Stock Number: OSMG0557
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

Primary Accessories

Stock Number Mfr Number Product Description Quantity Needed
 TOPQ5145   TOPQ5145  Top Flite 12x8 Power Point Propeller 1

Field Equipment

Stock Number Mfr Number Product Description Quantity Needed
 GPMQ4150   GPMQ4150  Great Planes Ultra Precision Fuel Filter 1
 HCAP0700   HCAP0700  Hobbico 1.5V Glow Plug Battery 1
 HCAP2503   HCAP2503  Hobbico Twist/Locking Glow Plug Clip 1
 HCAP2550   HCAP2550  Hobbico 4-Way Wrench w/Plug Storage 1
 HCAP3335   HCAP3335  Hobbico Safety Stick Engine Starter 1

Optional Accessories

Stock Number Mfr Number Product Description Quantity Needed
 HCAP3000   HCAP3000  Hobbico After Run Engine Oil 2 fluid oz 1
 MACG1150   1150  Macs Tuned Pipe .40-.60/8.5cc 1
 MACG2590   2590  Macs Tuned Pipe Adapter O.S. 40SF/46SF & TTR .46 1
 MACG6720   6720  Macs Bolt-Through Muffler O.S. 50SX/55AX 1
 OSMG2578   25425600  O.S. Muffler Extension #873 1
 OSMG5870   71531000  O.S. Bubbleless Clunk 1
 OSMG5872   72403050  O.S. Super Can Filter Large 1
 TOPQ5155   TOPQ5155  Top Flite 13x6 Power Point Propeller 1