Evolution Engines EVOE50GX User Manual
Evolution
®
Engines
50GX
USER GUIDE
Horizon Hobby, 4105 Fieldstone Road, Champaign, IL 61822 USA
Horizon Hobby Deutschland GmbH, Hamburger Strasse 10, 25335 Elmshorn Germany
Horizon Hobby UK, Units 1-4 Ployters Road, Staple Tye Harlow, Essex CM18 7NS United Kingdom
© 2009 Manufactured exclusively for Horizon Hobby, Inc.
www.evolutionengines.com
13213.1 revised 12/09
3
4
Introduction
Congratulations on your purchase of the newest and one of the most technically advanced 2-stroke gas model airplane engines in
the world. Whether you are new to the sport of model aviation or an experienced flyer, you will enjoy the features of the new Evolution
®
GX engine. Evolution engines are designed to be the most powerful in their class, extremely easy to start and operate, and provide years of
enjoyable service. These engines incorporate many unique features designed to ensure success with your new engine. This user’s guide is
intended to provide the basic information required to operate and maintain your Evolution GX engine.
Important: While the Evolution engine is extremely easy to operate, if this is your first experience flying a model airplane, it is highly recommended
that you have the help of an experienced modeler during the first few flights. Your local hobby shop or flying club can put you in touch with an
experienced pilot in your area.
Before using this engine, please read these instructions carefully.
Table of Contents
Introduction ................................................................................................................................................... 3
Contents Included ......................................................................................................................................... 4
Mounting the Engine ..................................................................................................................................... 4
Throttle Linkage ............................................................................................................................................ 4
Attaching the Fuel Lines ............................................................................................................................... 4
Fuel for the Evolution Gas Engine ................................................................................................................ 4
Spark Plug ..................................................................................................................................................... 4
Selecting a Suitable Propeller ..................................................................................................................... 4
Suggested Propeller Dimensions ................................................................................................................. 4
Evolution GX Engine Simple Start Ignition System ..................................................................................... 5
Installation of the GX Simple Start Ignition Unit ......................................................................................... 5
Enabling or Disabling Battery Test ............................................................................................................... 5
Programming Sequence .............................................................................................................................. 6
Starting the Engine ........................................................................................................................................ 7
Carburetor Adjustment ................................................................................................................................. 8
Troubleshooting Guide .................................................................................................................................. 9
Engine Specifications ................................................................................................................................... 9
80GX Evolution Engine Dimensions ............................................................................................................. 9
Exploded View ..............................................................................................................................................10
Warranty ....................................................................................................................................................... 11
Compliance Information for the European Union .................................................................................... 12
Contents Included
Engine
Spark Plug (EVO30013309)
Electronic Ignition (EVO3314LB)
Exhaust Gasket (EVO30040407)
Spark Plug Wrench
Spark Plug Cable Spiral Wrap
Break-in Oil
Instruction Manual
Decal Sheet (2 pcs)
Optional Items
Muffler (EVO30043400)
Silencer System (EVO30044206E)
Gas Start Kit (EVO1002)
Drill Guide Propeller (EVO3380)
Evolution 2-Cycle Synthetic Oil (EVOX1001Q)
Tachometer (HAN156)
Kill Switch (JRPA004)
Ignition Battery 2-Cell Li-Po 2100mAh (THP21002SPL)
Mounting the Engine
Most model airplane designs make provision for an engine mount. It
is extremely important that the engine mount be securely attached
to the airplane’s firewall and that the engine is securely attached
to the engine mount. Follow the instructions included with the
airplane for mounting the engine. The engine should be fastened
in place with 4 bolts, blind nuts and lock washers. Use 1/4 inch or
6mm bolts. If you decide to fasten the engine using a flexible motor
mount, always choose parts with enough solidity and strength.
Make sure all bolts are tightened and regularly check that they
remain tight and in good condition.
Note: The use of threadlock on all engine mounting fasteners is highly
recommended.
Important: Air is necessary to cool the engine during operation. Make
sure sufficient air circulation through the cowling is provided. As a
basic reference, the outlet area should be 3–5 times the area of the
inlet area to provide adequate cooling.
Throttle Linkage
Carefully attach the throttle linkage to the engine. We recommend
the use of a ball link on the carburetor. Make sure the linkage is
free to operate from low throttle to high throttle and confirm that
the low-throttle setting on the transmitter closes the carburetor
butterfly to the low-idle position. Adjust the length of the pushrod
until full throttle opens the carburetor butterfly fully, while low
throttle, low trim completely closes the butterfly.
Attaching the Fuel Lines
Use large gasoline-compatible fuel line in the fuel tank as well as
the supply line to the engine. The fuel stopper and the fuel lines
used in the fuel tank must be compatible with gasoline.
Fuel for the Evolution Gas Engine
The Evolution gas engine has been designed to run on a mixture
of high-quality 91-octane unleaded gasoline and synthetic oil
intended for racing 2-stroke gasoline engines. For the break-in
period of the new engine, mix the fuel in a ratio of 30 parts gasoline
to 1 part lubricant. After break-in, use a ratio of 40 parts gasoline to
1 part lubricant.
Spark Plug
The Evolution 50GX engine uses a CM-6 type of spark plug. Before
installing the spark plug you will need to set the spark plug gap to
the following dimension: .024 in to .028 in (.6mm to .7mm).
Selecting a Suitable Propeller
The Evolution 50GX has been designed to generate maximum power
at 6200–6600 rpm, according to the type of exhaust used. If you
wish to utilize the maximum power output, choose a propeller which
will allow the engine to reach these revolutions, or slightly lower
revolutions. (The engine will unload in the air depending on the
aircraft speed and propeller selected.)
Choose your propeller according to the chart and to achieve
approximately 6400 rpm on the ground for best performance and
the lowest noise signature.
We do not recommend using propellers that allow the engine to
reach more than 7500 rpm on the ground.
50GX
Two-blade
Three-blade
23x8 23x10 24x8 24x1022x10
21x11.5 21x12 22x10 22x12
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