Airplane Engine with Muffler

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Solid, gas-powered performance

The GT15 is the newest and smallest offering in the OS Engines gasoline engine line. It weighs only 904g and cranks out over 2 horsepower and 15,000 rpm! Plus, its compact enough to fit in most airplanes that require a 2-stroke 61-size or 4-stroke 91-size engine. The carburetor design is made specifically for this engine. Set also includes an ignition module.

O.S. Two Year Limited Warranty

  • Offers power equivalent to a .90 4-stroke or .60 2-stroke glow engine, with the superior fuel economy advantages of gasoline.
  • Features the same mounting pattern as the 65AX.
  • Includes the compact IG-06 ignition module.
  • Specially designed O.S. carb makes tuning a breeze and delivers excellent throttle response; it comes equipped with a regulator and pump.
  • A special roller bearing on the large end of the conrod allows for 50:1 fuel/oil mixture.



O.S. originally designed compact carburetor expressly for gasoline engine and pump are installed.

Ignition Module

A compact IG-0 Ignition Module is included with the motor for perfect starts every time.

Power Box Muffler

Standard size, lightweight, Powerbox™ muffler

Product Specifications

Manufacturer #38160
Bore1.091" (27.7mm)
Carb TypeRotary
Crankshaft ThreadsUNF5/16-24
Crankshaft TypeThreaded