Electric Motors, Engines & Accessories > Engines R/C Gasoline > Engines R/C Gasoline - 0.0-2.00 Bookmark this Page

O.S. - OSMG1916 OSM38153 38153 531028022522 4531028022522
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Accessories Needed

Replacement & Optional Parts

Easy RC: Engines

Browse O.S.

Product Feature Page

Manufacturer's Product Web Page

O.S. GT15HZ Gas Helicopter w/Powerboost Pipe
Click for parts for this item
O.S. GT15HZ Gas Helicopter w/Powerboost Pipe
View Larger Picture

On-line Videos: Video 1 (34.9 MB) Video 2 (YOUTUBE)
Instruction Manuals: Manual 1 (4.5 MB)
Tower Catalog Page: 168

Stock Number
FREE shipping when ordering this item on our web site... click for more information
Stock Status

Tech Notes
This is the O.S. Engines GT15HZ Gasoline Powered Helicopter Engine
with PowerBoost Pipe.


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
Polished aluminum PowerBoost pipe


O.S. Engines GT15HZ Engine with CM-6 Spark Plug, IG-05 Ignition
Module, PowerBoost Pipe 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


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)
Gasoline/Oil Mix: 25:1
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
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

– If you need more information, use these O.S. resources –
Click Here: Manufacturer's Product Web Page
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:

Click here for Units of Measure Conversion Calculators

Accessories Needed
This is the O.S. Engines GT15HZ Gas Powered Heli Engine. FEATURES: Fits most .90 size helis, IG-05 module designed for helis, pumper carb for consistent performance, CM-6 spark plug REQUIRES: Unleaded gasoline, 2-stroke engine oil, ignition battery

Accessories for the O.S. GT15HZ Gas Helicopter w/Powerboost Pipe

Primary Accessories     Optional Accessories
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
Click to Order Quantity Needed In Cart? Stock
 LXS626 Klotz Gas RC Modelube 16 oz
Qty Discount Available
8.19   In Stock
Subtotal for this Group of Accessories: 8.19  

Primary Accessories     Optional Accessories

Tower Hobbies Has Been Serving Hobbyists Since 1971 • Call 800-637-6050 or 217-398-3636
See Tower Hobbies
Reviews at Bizrate.com
Hobbico, Hobby & Model Construction
Supplies - Retail, Champaign, IL
We accept the following: We accept the following payment methods: Discover, MasterCard, Visa, American Express, Diners Club International, JCB, China UnionPay, PayPal, and PayPal Credit.
Unauthorized use of any materials presented here is prohibited. Copying or reproducing any elements from this page is not permitted. All prices, descriptions and availability subject to change. Displayed within some areas of our web site, the Retail Price is suggested by the manufacturer or supplier, or estimated in keeping with standard industry practice. It may not represent the prevailing price in your area or a price that Tower Hobbies has ever offered for the item.
Copyright © Tower Hobbies All rights reserved. Do not duplicate or redistribute in any form.