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Introduction

Congratulations  on  your  purchase  of  one  of  the  newest  and  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 pilot, 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. 
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 store or flying club can put  you in touch with an experienced pilot in your area.

Table of Contents

 Introduction ...................................................................................................................................................3

Contents Included ......................................................................................................................................... 5

Mounting the Engine ..................................................................................................................................... 5

Throttle Linkage  ............................................................................................................................................ 5

Choke Actuation ............................................................................................................................................ 5

Attaching the Fuel Lines ............................................................................................................................... 5

Spark Plug  ..................................................................................................................................................... 5

Selecting a Suitable Propeller ..................................................................................................................... 5

Suggested Propeller Dimensions ................................................................................................................. 5

Control Jet System ......................................................................................................................................... 6

Ignition System Warning ............................................................................................................................... 7

Ignition Unit Power Source........................................................................................................................... 7

Warnings ........................................................................................................................................................ 7

Enabling or Disabling Battery Test ............................................................................................................... 8

Starting the Engine ........................................................................................................................................ 9

Starting the Engine Continued ................................................................................................................... 10

Carburetor Adjustment ............................................................................................................................... 10

Troubleshooting Guide ................................................................................................................................ 11

152GX Evolution Engine Dimensions  ........................................................................................................ 12

152GX Evolution Engine Specifications  .................................................................................................... 12

Evolution Engines Auto-Choke Ignition System ........................................................................................ 12

Installation of the Auto-Choke Ignition Unit ............................................................................................. 13

Ignition Unit Wiring ...................................................................................................................................... 14

Programming Auto-Choke Ignition System and Pre-Ignition Curve ...................................................... 14

152GX Parts Diagram .................................................................................................................................. 15

152GX Parts List .......................................................................................................................................... 16

Summary of Contents for Evolution 152GX

Page 1: ...2008 Manufactured exclusively for Horizon Hobby Inc www evolutionengines com 877 504 2333 13207 Printed 10 08...

Page 2: ...Evolution Engines 152GX USER GUIDE...

Page 3: ...you have the help of an experiencedmodelerduringthefirstfewflights Yourlocalhobbystoreorflyingclubcanput youintouchwithanexperiencedpilotinyourarea Table of Contents Introduction 3 Contents Included 5...

Page 4: ...l enable Horizon to better answer your questions and service you in the event that you may need any assistance For questions or assistance please direct your email to productsupport horizonhobby com o...

Page 5: ...40 ball link Make sure that 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 i...

Page 6: ...the throttle valve is opening It will lean the mixture at low rpm and at idle Conversely the mixture will become richer as the throttle is opening This system provides better acceleration to high spee...

Page 7: ...ervosandhigh torqueservos consumemorecurrentthantheignitionsystem scircuitryisdesignedtoprovide Iftheservoyou veconnectedquiversorwon tworkatall itscurrentdrawisprobably toohigh Ignition System Warnin...

Page 8: ...r about 2 seconds If LED turns off you can fly otherwise battery is low FIRST STEP Screw pickup on engine Attach the plastic protection to the high voltage cable Connect boot to plug Mount ground term...

Page 9: ...filling the fuel line to the carburetor then switch the ignition to the ON position Flip the propeller smartly until the engine fires With the choke in the closed position the engine will fire then q...

Page 10: ...rpm range Stop the engine and recheck the fuel feed the fuel line must not be pinched or broken Restart the engine and test acceleration again If the problem persists adjust the carburetor Open the l...

Page 11: ...order of the components Check the vacuum feed line Mechanical Faults If the engine cannot be turned over easily The piston in the cylinder may be seized loosen and unscrew the cylinder bolts Carefull...

Page 12: ...ication Standard Unleaded 91 octane Oil with gasoline in mixture 1 30 Oil with gasoline in mixture 1 40 Evolution Engines Auto Choke Ignition System The spark ignition included with your Evolution gas...

Page 13: ...bolt or suitable place on the engine and push the spark plug cap firmly on the spark plug Install the spiral wrap spark plug lead covering to protect the plug lead steel braiding from any possible cha...

Page 14: ...1 Using the throttle stick close the choke until it closes completely Wait until the LEDblinksonce indicatingtheignitionhas memorizedthe closedchoke position 2 Using the throttle stick open the choke...

Page 15: ...15 152GX Parts Diagram...

Page 16: ...haft Assembly EVO30010308 Carburetor Flange Screws Set EVO30013309 Spark Plug EVO30941405 Ignition Sensor Fixing Screws EVO3010i1101 Drive Washer EVO30101102 Drive Washer Key EVO30011103 Propeller Nut...

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