OS Motors GT15 Air w/E-4040

Model: OS Motors OSMG1515
Dist. #: OSMG1515 SKU: OSMG1515

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Updated on Jul 3, 2025 09:41:51 PM

GT15 Air w/E-4040...

This is the O.S. GT15 Fuel Engine with the E-4040 Muffler.

FEATURES:
IG-06 electronic ignition deals with 4-6 cell NiCd, NiMH or 2-cell LiPo
and LiFe batteries
Beam mounting design permits engine to fit inside cowls that are
sized for 2-stroke .60-.91 and 4-stroke .90 radiance engines
2 year restricted warranty through Hobby Provider beginning at date
of purchase

INCLUDES:
GT15 Fuel Engine with E4040 Muffler, IG-06 Ignition Module
CM6 Spark Plug, 61H Carburetor, and User's Manual

REQUIRES:
2-cycle oil, see SPECS
Fuel: Routine, 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
Prop: 13x8-11, 14x8-10, 15x8
Electric Starter
Fuel safe fuel tubing and fuel filter

SPECS:
Displacement: 0.912 cu in (14.95cc)
Bore: 1.091" (27.7mm)
Stroke: 0.976" (24.8mm)
Practical RPM: 2,000-11,000 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 additional 60-90° from point where RPM begins to
reduction, open gradually as RPM increases, then open 90° even more
from maximum RPM point
Mixture Control Valve; Open one turn, open and close throttle a couple of
time to make sure there is no resistance, close mixture control
valve 30°, repeat open and closing of throttle then open mixture
control valve around 90°
Width at Mounting Tabs: 2.4" (61mm)
Width of Crankcase listed 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 Own 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)