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4.5 out of 5 Customer Rating

GT15 15cc Gas 2-Cycle Airplane Engine with Muffler

Item No. OSMG1515
Brand Logo
4.5 out of 5 Customer Rating

GT15 15cc Gas 2-Cycle Airplane Engine with Muffler

Item No. OSMG1515
$399.99 Price reduced from $599.99 to
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Product Details

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


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