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Manuals & SupportSolid, 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.

- 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.

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

Standard size, lightweight, Powerbox™ muffler
Product Specifications
Manufacturer # | 38160 |
Bore | 1.091" (27.7mm) |
Crankshaft Type | Threaded |
Power Type | Gas |
Stroke | 0.976 (24.8mm) |
Crankshaft Threads | UNF5/16-24 |
Ignition Weight | 3.35 oz (95 g) |
Muffler Weight | 6.28 oz (178 g) |
Cylinders | Single |
Displacement | 0.912 cu in (14.95 cc) |
Oil Type & Content | 2-cycle oil at 30:1 - 50:1 mix ratio |
Product Width | 2.4" (61mm) at mounting tabs |
Total Weight | 32 oz (904 g) |
Product Length | 4.2" (106.2mm) from pump to front bearing |
Plug Type | CM6 |
Engine (Only) Weight | 22.26 oz (631 g) |
Muffler Type | 2-piece aluminum |
Carb Type | Rotary |
Product Height | 4.3" (109mm) from crankcase bottom to top of cylinder head |
Prop Range | 13 x 8-11 - 15x8 |
RPM Range | 2,000 - 15,000 |
Starter Type | Hand Held Starter |