O.S. GT15HZ Gas Helicopter w/o Muffler

Tower Stock# LXCZAT  •  Manufacturer Stock# 38150
O.S. GT15HZ Gas Helicopter w/o Muffler (large view)
Notes from our tech department:
This is the O.S. Engines GT15HZ Gasoline Powered Helicopter Engine
without Muffler.


Ideal for sport, 3D and scale pilots
Fits most .90 size helis with minor modifications
O.S. Walbro developed pumper carburetor for consistent performance
regardless of attitude, altitude, or fuel level
IG-05 ignition module designed specifically for helis and is
compatible with a wide range of battery chemistries including NiCd
NiMH, LiPo and Life packs
Two year limited warranty through Hobby Services beginning at date of


O.S. Engines GT15HZ Engine with CM-6 Spark Plug, IG-05 Ignition
Module, two Servo Throttle Arms, and Instruction Manual


Gasoline: Regular unleaded
2-Stroke Engine Oil
Ignition Battery: 4.8-8.4V NiCd, NiMH, 6.6V LiFe or 7.4V LiPo pack,
at least 1500mAh
Muffler: Depending on application


Displacement: 0.912 cu in (14.95cc)
Bore: 1.091" (27.7mm)
Stroke: 0.976" (24.8mm)
Practical RPM: 2,000 - 16,000
Output: 2.76hp @ 14,000 RPM
Weight: Engine, 26.4oz (748g)
IG-05 Ignition Module, 3.2oz (92g)
Power Boost Pipe, 7oz (198g)
E-4051 Muffler5oz (144g)
Carburetor Adjustments; If engine responds sluggishly to increased
RPM, turn slow needle right 5 and advance throttle stick gradually
If engine hesitates before picking up speed, turn slow needle left
10 to richen mixture
Gasoline/Oil Mix: 25:1
Distance/Mounting Hole Centers Same Side: 1.02" (26mm)
Distance/Mounting Hole Centers Opposite Side: 2.1" (53mm)
Height/Mounting Tab Bottom to top of Cylinder Head: 3.5" (88mm)
Height/Crankcase Bottom to top of Cylinder Head: 4.3" (109mm)
Width at Mounting Tabs: 2.4" (61mm)
Width of Crankcase below Mounting Tabs: 1.7" (42.5mm)
Distance between Exhaust Mounting Hole Centers: 1.6" (42mm)
Length from Center of Engine to Front Bearing: 2" (52mm)
Length from Backplate to Front Bearing: 3.14" (80mm)
Length from Center of Engine to end of Crankshaft 3.5" (88mm)
Length from Backplate to end of Crankshaft: 4.75" (121mm)

jxs 01/16/13

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