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Evolution 50GX (3.1) Gas Engine

Evolution 50GX (3.1) Gas Engine

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Image for Evolution 45GX2 Gas Engine from HorizonHobby
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Key Features

  • Specifically designed for 50cc 27% scale models
  • Easy-to-start electronic ignition
  • Superior Porting
  • Specially engineered for no-fuss flying
  • Preset Walbro carburetor
  • Same no-fuss reliability as Evolution's glow engines
  • Includes everything needed for installation

Needed To Complete

Exhaust Systems:

EVO30044206E Silencer System Complete (cannister type)

EVO30043400 Inverted Wraparound muffler

BIS05546 Inverted muffler


22x8 or 23x8


With its lightweight magnesium crankcase and advanced porting, the 45GX2 offers the highest power-to-weight ratio in the Evolution® Gas lineup. Aimed directly at the very popular 50cc class of models, the Evolution 45GX2 will provide that vertical thrust you crave for 25% to 30% scale aerobatic planes like Hangar 9’s 27% Extra 260 ARF.

The 45GX2 comes equipped with Evolution’s new GX2 Ignition System. The GX2 system can be powered by most any 2-cell Li-Po pack without the need of a regulator. It also features a sophisticated auto-choke function, timing that can be programmed for mufflers or tuned pipes, and an optional, remotely-mounted LED tach.

Detailed Information

Evolution 45GX Installed in the Extra 260 ARF

Benchmark Prop: 23"x8" Mejzlik @ 6100 rpm
Bore: 1.49 in (38.00 mm)
Carb Type: Walbro
Crank Type: Ball Bearing
Crankshaft Threads: M10 x 1 mm
Cylinder Type: Ring
Cylinders: Single
Displacement: 2.60 cu. in. (43.00 cc)
Engine (Only) Weight: 1290 grams (45.53 oz)
Fuel: Gas/Oil Mix
HP: 5.2 PS /6200 rpm
Muffler Type: Can
Starting System: Electronic Ignition
Stroke: 1.49 in (38.00 mm)

Parts Listing

 $1.49 $1.59
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 $2.99 $3.19
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 $11.99 $12.69
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Optional Accessories

 $32.99 $42.99
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