Evolution Engines 152GX User Manual

© 2008 Manufactured exclusively for Horizon Hobby, Inc.

www.evolutionengines.com 877-504-2333

13207

Printed 10/08

Evolution

152GX

USER GUIDE

®

Engines

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

Introduction

Congratula tions on yo ur purchase of one of the newe st and most technically advanced 2- stroke ga s model air plane 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.

3

Warranty Period

Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the
Products purchased (the “Product”) will be free from defects in
materials and workmanship for a period of 2 years from the date of
purchase by the Purchaser.

Limited Warranty

(a) This warranty is limited to the original Purchaser (“Purchaser”) and
is not transferable. REPAIR OR REPLACEMENT AS PROVIDED UNDER
THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER. This
warranty covers only those Products purchased from an authorized
Horizon dealer. Third party transactions are not covered by this warranty.
Proof of purchase is required for warranty claims. Further, Horizon
reserves the right to change or modify this warranty without notice and
disclaims all other warranties, express or implied.

(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION,
EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCT. THE
PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED
THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE
PURCHASER’S INTENDED USE.

(c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be
that Horizon will, at its option, (i) repair or (ii) replace, any Product
determined by Horizon to be defective. In the event of a defect, these
are the Purchaser’s exclusive remedies. Horizon reserves the right to
inspect any and all equipment involved in a warranty claim. Repair
or replacement decisions are at the sole discretion of Horizon. This
warranty does not cover cosmetic damage or damage due to acts
of God, accident, misuse, abuse, negligence, commercial use, or
modification of or to any part of the Product. This warranty does not
cover damage due to improper installation, operation, maintenance,
or attempted repair by anyone other than Horizon. Return of any
goods by Purchaser must be approved in writing by Horizon before
shipment.

Damage Limits

HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR
COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY,
NEGLIGENCE, OR STRICT LIABILITY. Further, in no event shall the liability
of Horizon exceed the individual price of the Product on which liability
is asserted. As Horizon has no control over use, setup, final assembly,
modification or misuse, no liability shall be assumed nor accepted for
any resulting damage or injury. By the act of use, setup or assembly, the
user accepts all resulting liability. If you as the Purchaser or user are not
prepared to accept the liability associated with the use of this Product,
you are advised to return this Product immediately in new and unused
condition to the place of purchase.

LAW: These Terms are governed by Illinois law (without regard to conflict
of law principals).

Safety Precautions

This is a sophisticated hobby Product and not a toy. It must be operated
with caution and common sense and requires some basic mechanical
ability. Failure to operate this Product in a safe and responsible manner
could result in injury or damage to the Product or other property. This
Product is not intended for use by children without direct adult
supervision. The Product manual contains instructions for safety,
operation and maintenance. It is essential to read and follow all the
instructions and warnings in the manual, prior to assembly, setup or
use, in order to operate correctly and avoid damage or injury.

Questions, Assistance, and Repairs

Your local hobby store and/or place of purchase cannot provide
warranty support or repair. Once assembly, setup or use of the
Product has been started, you must contact Horizon directly. This
will 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
[e-mail], or call 877.504.0233 toll free
to speak to a service technician.

Inspection or Repairs

If this Product needs to be inspected or repaired, please call for
a Return Merchandise Authorization (RMA). Pack the Product
securely using a shipping carton. Please note that original boxes
may be included, but are not designed to withstand the rigors
of shipping without additional protection. Ship via a carrier that
provides tracking and insurance for lost or damaged parcels, as
Horizon is not responsible for merchandise until it arrives and is
accepted at our facility. A Service Repair Request is available at
www.horizonhobby.com on the “Support” tab. If you do not have
internet access, please include a letter with your complete name,
street address, email address and phone number where you can
be reached during business days, your RMA number, a list of the
included items, method of payment for any non-warranty expenses
and a brief summary of the problem. Your original sales receipt
must also be included for warranty consideration. Be sure your
name, address, and RMA number are clearly written on the outside
of the shipping carton.

Warranty Inspection and Repairs

TO RECEIVE WARRANTY SERVICE, YOU MUST INCLUDE YOUR ORIGINAL
SALES RECEIPT verifying the proof-of-purchase date. Provided warranty

conditions have been met, your Product will be repaired or replaced free
of charge. Repair or replacement decisions are at the sole discretion of
Horizon Hobby.

Non-Warranty Repairs

Should your repair not be covered by warranty, the repair will be
completed and payment will be required without notification or
estimate of the expense unless the expense exceeds 50% of the
retail purchase cost. By submitting the item for repair you are agreeing

to payment of the repair without notification. Repair estimates are
available upon request. You must include this request with your repair.
Non-warranty repair estimates will be billed a minimum of ½ hour of
labor. In addition you will be billed for return freight. Please advise us
of your preferred method of payment. Horizon accepts money orders
and cashiers checks, as well as Visa, MasterCard, American Express,
and Discover cards. If you choose to pay by credit card, please include
your credit card number and expiration date. Any repair left unpaid or
unclaimed after 90 days will be considered abandoned and will be
disposed of accordingly. Please note: non-warranty repair is only

available on electronics and model engines.

United States:

Electronics and engines requiring inspection or repair should be shipped
to the following address:

Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822

All other Products requiring warranty inspection or repair should be
shipped to the following address:

Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822

Please call 877-504-0233 or e-mail us at
[e-mail] with any questions or concerns
regarding this product or warranty.

United Kingdom:

Electronics and engines requiring inspection or repair should be shipped
to the following address:

Horizon Hobby UK
Units 1-4 Ployters Rd
Staple Tye
Harlow, Essex
CM18 7NS
United Kingdom

Please call [phone] or e-mail us at
[e-mail] with any questions or concerns regarding this
product or warranty.

Germany:

Electronics and engines requiring inspection or repair should be shipped
to the following address:

Horizon Technischer Service
Hamburger Strasse 10
25335 Elmshorn
Germany

Please call [phone] or e-mail us at
[e-mail] with any questions or concerns regarding this
product or warranty.

4

Contents Included

152GX

Two-blade
Three-blade

30x12 32x10 32x12 32.5x1130x10

28.5x12 29x12

Engine

Spark Plug 2 pcs (EVO30013309)
Electronic Ignition (EVO3314BB)
Exhaust Gasket (EVO30070407)
Plug wrench
Spark plug cable spiral wrap
Break in oil
Instruction sheet
Decal sheet

Optional Items

Muffler (EVO30113410)
Gas Start Kit (EVO1002)
Evolution 2-cycle Synthetic Oil (EVOX1001Q)
Silencer system (EVO30114210E)
Evolution stand off all 116/152 (EVO3312)
Ignition battery 3-cell 2100mAh Li-Po (THP21003SPL)
Micro Digital Tachometer (HAN156)

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 to
the firewall with 4 screws. Use good quality 1/4-inch or 6mm screw,
blind nuts and lock washers. Position the throttle servo, lower than
the carburator, to allow for more linear movement of the throttle.
If you decide to fasten the engine using a flexible motor mount,
always choose parts with enough solidity and strength. Make sure
all screws are tightened and regularly check that they remain tight
and in good condition.
In most installations an engine standoff will be required. To install
the entire engine forward of the firewall, one minimum 3-inch
standoff is needed. We recommend the EVO3312 engine standoff
assembly (available separately).

Important: Air is necessary to cool the engine during operation. Make
sure that 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 using a ball link
on the carburetor. The throttle arm will accommodate a 4/40 ball
link. Make sure that the linkage is free to operate from low throttle

5

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 throttle
fully, while low-throttle (low trim) completely closes the butterfly.

Choke Actuation

The choke lever is not drilled to accomodate a linkage from the
factory. If you plan to use a servo to activate the choke, the lever
will need to be drilled. Set this up in a manner similar to the throttle
linkage.

Attaching the Fuel Lines

Use large gasoline-compatible fuel line in the fuel tank as well as
the supply line to the engine. Use 3/16 brass/copper fuel tubing to
plumb the fuel tank. Be sure that the clunk inlet hole is of sufficient
size to work with this size of large fuel tubing.

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 152GX 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® 152GX has been designed to generate maximum
power at 5800–6300 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.)

Suggested Propeller Dimensions

We do not recommend using propellers that allow the engine to
reach more than 7500 rpm on the ground.