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Model: OS Motors OSMG1513
Dist. #: OSMG1513   SKU: OSMG1513

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Updated on Oct 16, 2018 10:14:32 PM

GGT15 Gasoline w/E4040...
This is the Fuel Powered GGT15 Engine w/E4040 Muffler from O.S. Engines.

FEATURES:
Suitable for bigger 2-stroke .61-.91 class designs, and 4-stroke .91
    class designs
Begins easily using a radiance chauffeur and radiance plug-eliminates ignition
    module and minimizes weight
61H carburetor with PD-08 pump system
Shell type roller bearings
Two year restricted warranty through Hobby Provider starting at date
    of purchase

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

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

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 Very Same Side: 0.98" (25mm)
Distance between Mounting Hole Centers Opposite Side: 2.04" (52mm)
Width at Mounting Tabs: (61mm)
Width of Crankcase listed below Mounting Tabs: 1.7" (44mm)
Width from Crankcase Center to Tire Outlet: 4.4" (112.3mm)
Height/bottom of Mounting Tabs to Muffler Bottom: 1.5" (37.6mm)
Length/Crankcase Center to Own 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 Modification;
Gradually open throttle fully when engine is started.
Close needle valve 30-45° increasing RPM
When RPM begins decreasing, close needle valve 60-90°, then open
    gradually 15° per 2nd as RPM increases
Open needle valve 90° further from point where max RPM is gotten
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 gotten is
    maximum mixture control valve position
    Mixture Control Valve Position;
Never attempt to adjust until needle valve modification is performed
Open mixture control valve one turn (360°), open & close a couple of
    times to be sure there is no resistance throughout throttle motion
Close mixture control valve 30°
Turn throttle until resistance is felt when opening throttle
    from closed position
Open mixture control valve approximately 90° from this point-this
    is the preliminary mixture control valve position
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