O.S. GT15 15cc Gas 2-Cycle Airplane Engine w/Muffler

O.S. GT15 15cc Gas 2-Cycle Airplane Engine w/Muffler
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Price: $409.99

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The O.S. GT15 15cc Gas 2-Cycle Airplane Engine is the 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.


  • 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
  • Specially designed O.S. carb makes tuning a breeze and delivers excellent throttle response
  • Comes equipped with a regulator and pump for superior fuel delivery consistency
  • Includes the Power Box™ muffler, designed with more volume for increased power while still being very compact
  • Roller bearing on the large end of the conrod allows for 50:1 fuel/oil mixture
  • Includes the compact IG-06 ignition module and mini spark plug
  • Requires OSM71905200 engine mount

Bore: 1.091" (27.7mm)
Carb Type: Rotary
Length: 4.2" (106.2mm) from pump to front bearing
Total Weight: 32 oz (904 g)
Recommended Fuel: 87 - 93 octane gasoline
Muffler Type: 2-piece aluminum
Muffler Weight: 6.28 oz (178 g)
Starter Type: Hand Held Starter
Cylinder: Single
RPM Range: 2,000 - 15,000
Height: 4.3" (109mm) from crankcase bottom to top of cylinder head
Crankshaft Type: Threaded
HP: 2.4 PS, 2.37 HP @ 15,000RPM
Ignition Weight: 3.35 oz (95 g)
Plug Type: CM6
Crankshaft Threads: UNF5/16-24
Width: 2.4" (61mm) at mounting tabs
Displacement: 0.912 cu in (14.95 cc)
Oil Type & Content: 2-cycle oil at 30:1 - 50:1 mix ratio
Prop Range: 13 x 8-11 - 15x8
Engine (Only) Weight: 22.26 oz (631 g)
Stroke: 0.976 (24.8mm)

This product was added to our catalog on July 8, 2020