O.S. GGT15 Glow Gasoline

OSM3A200 O.S. GGT15 Glow Gasoline

Note: Graves RC Coupons are not applicable with this product  

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  • Ideal for larger 2-stroke .61-.91 class models, and 4-stroke .91 class models
  • Starts easily using a glow driver and glow plug-eliminates ignition module and reduces weight
  • 61H carburetor with PD-08 pump system
  • Shell type roller bearings
  • Two year limited warranty through Hobby Services beginning at date of purchase 

GGT15 Engine w/E4040 Muffler, #G5 Glow Plug and Instructions 


Fuel: Gasoline and 2-cycle oil in a 50:1 mixture
Propeller depending on aircraft: Sport,13x8-11
Acro, 14x8-10
Scale, 15x6-8
Glow starter & field equipment 

Technical Specifications:

Displacement: 0.912 cu in (14.95cc)
Bore: 1.091" (27.7mm)
Stroke: 0.976" (24.8mm)
Practical RPM Range: 2,000-11,000
Output: 2.35 ps/2.32 hp @ 15,000 RPM
Weight: Engine, 21.5oz (610g)
Muffler, 6.28oz (178g)
Distance between Mounting Hole Centers Same Side: 0.98" (25mm)
Distance between Mounting Hole Centers Opposite Side: 2.04" (52mm)
Width at Mounting Tabs: (61mm)
Width of Crankcase below Mounting Tabs: 1.7" (44mm)
Width from Crankcase Center to Exhaust Outlet: 4.4" (112.3mm)
Height/bottom of Mounting Tabs to Muffler Bottom: 1.5" (37.6mm)
Length/Crankcase Center to Drive Washer: 2.6" (66.8mm)
Length/Crankcase Center to end of Crankshaft: 4.03" (102.6mm)
Length from Pump to end of Crankshaft: 5.6" (142mm)
Crankshaft Size: UNF 5/16-24
Rearward Needle Valve Angle Relative to Engine: 30°
Needle Valve Adjustment;
Gradually open throttle fully when engine is started. Close needle valve 30-45° increasing RPM When RPM starts decreasing, close needle valve 60-90°, then open slowly 15° per second as RPM increases Open needle valve 90° further from point where max RPM is obtained  Fly model until running in is completed (10 tanks of fuel) After running in is completed, set idle around 3000RPM Stop engine, close mixture control valve 15°, note idling RPM 90° opened position from where max idling RPM is obtained is optimum mixture control valve position Mixture Control Valve Position; Never try to adjust until needle valve adjustment is performed Open mixture control valve one turn (360°), open & close a few times to be sure there is no resistance during throttle movement Close mixture control valve 30°
Rotate throttle until resistance is felt when opening throttle from closed position Open mixture control valve approximately 90° from this point-this is the initial mixture control valve position



Technical Specifications No
Oversized Item No
Manufacturer OS ENGINES
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