Evolution Engines 62GXI with SureFire EFI

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MSRP Price: $659.99
Item#: EVOE62GXI
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Not an engine expert? We have you covered with a Giant-Scale gas engine for those who don’t want the requirement of engine expertise. The Evolution® Engines 62GXi is a potent 62cc engine with the efficiency and convenience of an electronic fuel injection system. Simple to setup and maintain, it’s a Horizon Hobby innovation that means you never have to touch a needle-valve to enjoy starting ease, reliability and long engine life. That’s because SureFire™ Electronic Fuel Injection (EFI) technology combines finely-tuned software and sophisticated sensors so the engine gets the perfect flow of fuel no matter where or what you fly.

The Evolution Engines 62GXi is the only purposely built RC engine on the market to feature an advanced electronic fuel injection system specially made for the needs of the giant-scale model pilot. There are no needle-valves to ever worry about because the SureFire EFI™ system provides smooth, reliable operation and optimum engine transition automatically, regardless of throttle position or atmospheric conditions. Just fuel, flip and fly.

Like all Evolution engines, the 62GXi is built to exact standards with high-quality materials, plus it comes ready to run with a compact 2-cell Li-Po compatible ignition and high-quality muffler. It’s the most advanced giant-scale gas power system you won’t have to touch except to fill the gas tank.

  • SureFire™ EFI electronic fuel injection system
  • Electronic ignition system with 7.4V Li-Po battery compatibility
  • Purpose built engine for giant-scale model aircraft
  • High-quality materials and lightweight design
  • Shares the overall dimensions and mounting pattern of other popular engines in its class
  • Common muffler mount fits a variety of available exhaust systems
  • Dual ball-bearing equipped, cantilevered crankshaft
  • Common 4-bolt propeller mounting pattern
  • Built-in crankcase support means only short (50mm) stand-offs are required
  • High-quality CM-6 spark plug included


Type: 2-stroke gas/petrol airplane engine
Displacement: 3.75 cu. in. (61.49 cc)
Bore: 1.81 in (46.0mm)
Stroke: 1.46 in (37.0mm)
Cylinders: Single
Total Weight: 66.6 oz (1888 g)
Engine (Only) Weight: 53.8 oz (1525 g)
Muffler Weight: 8.2 oz (233 g)
Crankshaft Threads: 4-5mm prop bolts on 30mm diameter centers
Benchmark Prop: Falcon 23 x 9 @ 7300 rpm
Prop Range: 22 x 8 - 24 x 10
RPM Range: 1,000-8,000
Fuel: 87 octane and above, synthetic oil at 32:1 ratio
Muffler Type: Inverted wraparound (included)
Cylinder Type: Ringed
Carb Type: Electronic fuel injection


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

Frequently Asked Questions

What does EFI stand for?

Electronic Fuel Injection

What kinds of batteries are required?

Both the Air and the Car system utilize a single 2S LiPo battery system for all the power needs of the EFI and ignition system where appropriate. The EFI system itself draws about 200mAh of current. When combined with the electronic ignition system in the Airplane configuration the total current draw can be +- 600mah at wide open throttle. Our experience has been that a typical flight profile will average a 350mah current draw for the entire system.

How exactly does the fuel-injection-system work?

The system uses a combination of 4 sensors: 1)RPM and crank position, 2) Throttle position, 3) case temperature, 4) Intake air temperature. Through an onboard algorithm the ECU determines the correct amount of fuel to inject into the throttle body on each revolution.

Where in the engine is the fuel injected?

This is a throttle body fuel injection system so it goes right into the venturi of the throttle body.

How does the system know the right fuel amount?

Using the sensors noted above the system determines the correct amount of fuel based on extensive programming and testing that we have done. The system will hunt to find the highest rpm whenever the throttle is above 95% open and then apply any changes across the entire programming. Each time the throttle is advanced above 95% this hunting occurs so the system is constantly optimizing itself for the current weather and load conditions.

Which are the advantages of the system?

#1 - Ease of use. The user never has to worry about adjusting (or mis-adjusting) needle valves again.

#2 - Ease of starting – Car: Combined with our on-board ROSS system the starting and operation of the engine is now a hands off experience.

#2 – Ease of Starting – Air: After using the included primer bulb on the first start of the day, typical engine starts occur in 2 – 5 flips of the propeller. No more need to close/open a choke plate – any extra fuel needs for starting is all handled by the EFI System itself.

What should the user take care of while using the system?

Make sure the fuel supply is kept very clean. We have included a 1.2 micron filter in the tank to keep the fuel injector fuel supply clean and trouble free.

Keep the batteries charged.

Keep the air filters clean. (Car version)

What about the maintenance?

There are no unusual maintenance needs with our EFI system if the fuel supply is kept clean.