OS 38160, GT-15

4 060,00 kr

This is the O.S. GT15 Gasoline Engine with the E-4040 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.
  • 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.

IG-06 electronic ignition handles 4-6 cell NiCd, NiMH or 2-cell LiPo
and LiFe batteries
Beam mounting design allows engine to fit inside cowls that are
sized for 2-stroke .60-.91 and 4-stroke .90 glow engines


GT15 Gasoline Engine with E4040 Muffler, IG-06 Ignition Module
CM6 Spark Plug, 61H Carburetor, and Instruction Manual


2-cycle oil, see SPECS
Gasoline: Regular, no need to use high octane gasoline
Ignition Battery: 4.8-8.4V NiCd or NiMH, 6.6V LiFe or 2S 7.4V LiPo
pack, LiPo battery requires voltage regulator
Propeller: 13×8-11, 14×8-10, 15×8
Electric Starter
Gasoline safe fuel tubing and fuel filter


Displacement: 0.912 cu in (14.95cc)
Bore: 1.091″ (27.7mm)
Stroke: 0.976″ (24.8mm)
Practical RPM: 2,000-15,000 RPM
Weight: 22.26oz (631g) engine
6.28oz (178g) muffler
3.35oz (95g) ignition module
Gasoline/Oil Mixture: 30:1 – 50:1
25:1 fuel/oil mixture if brand of oil states 50:1 mix
Carburetor Settings;
Needle Valve: With engine running, close needle valve as RPM
increases, close further 60-90° from point where RPM starts to
decrease, open slowly as RPM increases, then open 90° further
from maximum RPM point
Mixture Control Valve; Open one turn, open and close throttle a few
times to make sure there is no resistance, close mixture control
valve 30°, repeat open and closing of throttle then open mixture
control valve approximately 90°
Width at Mounting Tabs: 2.4″ (61mm)
Width of Crankcase below Mounting Tabs: 1.7″ (44mm)
Length between Mounting Hole Centers: 0.98″ (25mm)
Crankshaft Size: UNF 5/16-24
Muffler Mounting Angle from center of Engine: 4°
Needle Valve Mounting Angle from center of Engine: 30°
Length from Pump to Drive Hub: 4.2″ (106.2mm)
Length from Pump to end of Crankshaft: 5.6″ (142mm)
Length from Pump to center of Crankcase: 1.5″ (39.4mm)
Length from Drive Hub to end of Crankshaft: 1.4″ (35.8mm)
Length/center of engine/opposite side of Muffler: 4.1″ (103.3mm)
Length/center of engine to side of Cylinder Head: 0.96″ (24.3mm)
Length between Muffler Mounting Hole Centers: 1.6″ (42mm)
Length from Crankshaft Center to Muffler Outlet: 4.4″ (112.3mm)


O.S. Engines