Evolution 26GX (1.6) GAS ENGINE

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MSRP Price: $699.99
Item#: EVOE26GT2
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The 26GT comes equipped with Evolution’s advanced GT2 Ignition System. The GT2 Ignition System can be powered by a Li-Po battery pack without the need for a regulator. It also includes an optional, remotely-mounted LED tach as well as timing software that can be programmed for muffler or tuned pipe exhaust systems.

The 26GT2 is ideal for 1.20 sport applications like Hangar 9’s Ultra Stick Lite and Seagull’s Super Star 120 ARF.

  • Easy conventional mounting with existing motor mounts
  • Easy-to-start electronic ignition
  • Superior porting
  • Specially engineered for ease of use
  • Preset Walbro carburetor
  • Same no-fuss reliability as Evolution's glow engines
  • Includes everything needed for installation


Type: 2-stroke Gasoline
Displacement: 1.55 cu in (25.50 cc)
Bore: 1.30 in (33.00 mm)
Stroke: 1.17 in (30.10 mm)
Cylinders: Single
Engine (Only) Weight: 936 g (33.6 oz)
Crankshaft Threads: M 10x1mm
Benchmark Prop: 18x6 @ 8,700
Prop Range: 16x8 - 18x8
RPM Range: 1,400 - 9,500
Fuel: Gas/Oil Mix 40:1
Mounting Dimensions: 146 x 70 x 99 mm
HP: 3.8 Ps @ 9,000 RPM
Cylinder Type: Ring
Carb Type: walbro 2-needle WT481
Crank Type: Ball Bearing


Recent tests have shown that the new Evolution Engines GT2 and GX2 ignition systems require a minimum of 6.4 volts for proper operation.  Subsequently, it is necessary to use either a 6-cell, 7.2-volt Ni-Cd/Ni-MH battery or a 2-cell, 7.4-volt Li-Po (lithium-polymer) battery as the power source for these ignitions.  Capacity ratings of 1200mAh are sufficient for a day’s flying time.

 When the battery voltage drops below 6.4 volts, the ignition will not allow the engine to restart.  This battery requirement applies to 26GT2, 45GX2 and 58GX2 engines having the new ignition and has now been incorporated into the instruction manuals for these engines.

It has come to our attention that some users are not aware that when using the GT2/GX2 electronic ignition that it fires the spark plugs for 1 second to clear any unwanted oil or drainage from the spark plug prior to starting the engine. If the engine is in the compression position (i.e. the piston is above the exhaust port in either the up or down part of the stroke) any compressed fumes may ignite causing the propeller to turn and possibly the engine to start un-intentionally..

To prevent this with the Evolution Gasoline GX2, GT2 Ignition System the Ignition Power Switch must be turned off, check to see that the piston is in the bottom dead center (BDC) position. (Bottom Dead Center can be found by rotating the propeller through the compression stroke. As you rotate the propeller you will feel it tighten, then suddenly loosen. Once the turn becomes very easy you have completed the compression stroke and are at Bottom Dead Center.)

Once you are sure the piston is in this position you may then turn on the ignition power switch and operate the system safely.

As always it is important to use extreme care when near or with engines, fuel and propellers. Please use caution when working with these components.

If you have any questions or concerns please contact our Product Support team at 1-877-504-0233 or


Parts Explosions

Detailed Information

Evolution 26GT Installation in Super Star 120 ARF


1 Authorized Warranty Period (Two Year)

What this Warranty Covers:
Horizon Hobby, Inc., (Horizon) warrants to the original purchaser that the product purchased (the "Product") will be free from defects in materials and workmanship for a period of 2 years from the date of purchase.

2 Authorized Limited Warranty & Limits of Liability International

What is Not Covered
This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or due to improper use, installation, operation or maintenance, (iii) modification of or to any part of the Product, (iv) attempted service by anyone other than a Horizon Hobby authorized service center, (v) Product not purchased from an authorized Horizon dealer, or (vi) Product not compliant with applicable technical regulations.


Purchaser’s Remedy
Horizon’s sole obligation and purchaser’s sole and exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 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 the Product, purchaser is advised to return the Product immediately in new and unused condition to the place of purchase.

These terms are governed by Illinois law (without regard to conflict of law principals). This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Horizon reserves the right to change or modify this warranty at any time without notice.


Questions, Assistance, and Services
Your local hobby store and/or place of purchase cannot provide warranty support or service. Once assembly, setup or use of the Product has been started, you must contact your local distributor or 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 visit our website at, submit a Product Support Inquiry, or call 877.504.0233 toll free to speak to a Product Support representative.

Inspection or Services
If this Product needs to be inspected or serviced and is compliant in the country you live and use the Product in, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA) number. 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. An Online Service Request is available at If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service. When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you can be reached during business hours. When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem. A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.
NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office.

Warranty Requirements
For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. Service or replacement decisions are at the sole discretion of Horizon.

Non-Warranty Service
Should your service not be covered by warranty, service 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 service you are agreeing to payment of the service without notification. Service estimates are available upon request. You must include this request with your item submitted for service. Non-warranty service estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Horizon accepts money orders and cashier’s checks, as well as Visa, MasterCard, American Express, and Discover cards. By submitting any item to Horizon for service, you are agreeing to Horizon’s Terms and Conditions found on our website

ATTENTION: Horizon service is limited to Product compliant in the country of use and ownership. If received, a non-compliant Product will not be serviced. Further, the sender will be responsible for arranging return shipment of the un-serviced Product, through a carrier of the sender’s choice and at the sender’s expense. Horizon will hold non-compliant Product for a period of 60 days from notification, after which it will be discarded.

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

Please call +44 (0) 1279 641 097 or e-mail us at with any questions or concerns regarding this product or warranty.

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

Horizon Technischer Service
Christian-Junge-Strasse 1
25337 Elmshorn

Please call +(0) 49 4121 2655 100 or e-mail us at with any questions or concerns regarding this product or warranty.

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

Horizon Hobby SAS
11 Rue Georges Charpak

Please call +33 (0) 1 60 18 34 90 or e-mail us at with any questions or concerns regarding this product or warranty.

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

Horizon Hobby – China
Room 506, No. 97 Changshou Rd.
Shanghai, China 200060

Please call +86 (021) 5180 9868 or email us at with any questions or concerns regarding this product or warranty.



Modified: 11/13/2012

Team Tips

Initial operating impressions of the new Evolution 26GT engine

The introduction of the Evolution 26GT gas engine with electronic ignition has given may people a chance to jump on the gasoline engine bandwagon with a no nonsense, easy to use power plant that is familiar in configuration to common glow model airplane engines. As many people are finding, this is one fun engine to use and provides surprising power.

A person’s initial impression when opening the box is that the engine is very attractive and exhibits quality construction that we have come to expect from European products. There are also other features that will benefit you, beginning with the first installation you make:

· Easy mounting provided by conventional beam mounts.
· Easy muffler attachment using two screws to attach to the engine’s exhaust port.
· The Walbro carb has become common on most gas engines and has proven to be very user-friendly.
· The new electronic ignition with rpm readout for your optical tach (Also gives max rpm reached during the just- finished flight!)

Initial break-in per the manual can be accomplished at the flying field, using your flight prop and a fuel mixture of 33 to 1 gas/oil mixture. There is definitely an rpm improvement as the engine gets some running time. But from the very beginning, you will find that this is a very easy gas engine to operate. Usually the first start up can be accomplished by making sure that fuel is in the fuel line and up to the carb. Then put the choke to the on position, turn the ignition on and flip the prop. The engine will fire after a few flips and then quit. Move the choke to the running position and again flip the prop. The engine will start and you can set your transmitter low speed trim to achieve the idle speed you want. After a few seconds to warm up, you can move the throttle stick up to check needle settings. If changes are needed, shut the engine off before making any change. Many times you will find the restart to be on the first flip; this is always a satisfying experience.

We have tried a few different props of various diameter and pitch but the best performance seems to come from something in the 18x6 range. RPM should be around 8000 or a little more with this size prop. As usual you will find a world of difference between different manufacturer’s props of the same size. Do not depend on the prop that gives the most rpm for a specific size. Airborne performance will always be the key.

One thing you will find out soon enough—this engine is a fuel miser! The 18-ounce tank looks like it will give as much as 40 minutes running time! A smaller fuel tank might be a good recommendation unless you just like to fill up the tank once a day at the flying field. I say “looks like” because I have not been able to run it dry in my test flights. Switching to the 40:1 fuel/oil mixture after break-in will reduce the amount of cleanup on the airframe at the end of the day.

There have been no surprises during our testing period, and I am always looking for another model to put it in for an evaluation of what you can do with this engine. So far, it has powered the Ultra Stick Lite, two different Hangar 9 Taylorcrafts (big airplane, little motor) and currently a Hangar 9 Edge 540 (remember that one?).

Originally, I tested the Ultra Stick Lite with the tuned pipe and header (EVO30944266E) and using a Zinger 18x6 pro propeller. This was a pretty wild combination with exciting performance. The tuned pipe was very quiet compared to other systems and it definitely adds power.

The Taylorcraft is a wonderful sport flying experience with the Evolution 26GT. The engine was fitted with a Bisson inverted wraparound Pitts style muffler. Plenty of power for aerobatics, simple installation and lighter weight than the Zenoah G26 it was designed to use. There are a lot of other combinations that were originally for glow engines that can now be easily gas powered for more fun and economy.

In a nutshell, this is one heck of a fun sport flyer’s engine or a first gas engine for someone that wants to get into gas powered models. The ease and economy of operation is a definite plus and the models that it powers will still fit in your minivan, so you wont have to buy a new SUV or trailer to get them out to the flying field. I am anxious to hear your experiences so feel free to drop us a note.