40NX RC Glow Engine with Muffler



*at participating retailers

Due Early June, 2018

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The NX series is designed to provide a unique combination of powerful performance, reliable engineering and remarkable ease of use. The .40NX is the same size and weight as our competitor’s .32-size glow engines, but packs more of a punch. Its displacement of .40 cu in provides sport models with plenty of get-up-and-go without adding weight. And since it’s an Evolution® engine, the .40NX has the innovative low-speed SetRight™ needle valve with a lever that makes easy adjustments and takes all the guesswork out of operation.

Age Recommendation: Not for children under 14 years. This is not a toy.


  • More displacement, but same size and weight as .32-size engine
  • Designed for use on 25- to 36-size aircraft
  • Aftermarket high-performance muffler available for more power
  • Low-speed SetRight™ needle valve


Lite case 2-stroke
.41 cu in (6.74cc)
.845 in (21.69mm)
.717 in (18.21mm)
Total Weight:
12.5 oz (356 g)
Engine (Only) Weight:
10.0 oz (285 g)
Muffler Weight:
2.5 oz (71g)
Crankshaft Threads:
1/4 x 28
Benchmark Prop:
APC 10 x 6 @14,300, APC 9 x 7 @15,600
Prop Range:
9 x 5–11 x 6
RPM Range:
5–30% nitro, 18% synthetic or synthetic/castor mix oil
Muffler Type:
Expansion chamber
Cylinder Type:
Carb Type:

Parts & Accessories

Included   (See All)

  • Muffler Assembly 40NX

  • 2-& 4-Cycle Super Glow Plug

Parts Listing   (See All)

  • Ball Bearing, Rear (Open Race)

  • Ball Bearing, Front

  • Connecting Rod S32204

  • Crankshaft S32210

Optional Accessories   (See All)

  • Thin Electric Propeller, 5 x 3

  • Thin Electric Pusher Propeller, 5 x 3

  • Sport Propeller,9 x 6

  • Sport Propeller 9 x 7 (Single)

Used In...   (See All)

The "40NX RC Glow Engine with Muffler" is used in the following:


Technical Notes

The 40NX was designed to bolt in extra horsepower to most 25- to 32-size aircraft. The 40NX will fly .40-size planes, but with its smaller case size will not fit most .40-size engine mounts, and with its light weight may require extra nose weight for proper CG balancing.