Evolution Engines EVOM1 User Manual
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7. The Evolution Muffler is longer than stock mufflers. This muffler is tuned and cannot be shortened.
a. Exhaust deflectors or extensions may be installed if needed on your aircraft.
b. The propeller may need to be changed so the engine reaches its tuning rpm. The tuning rpm with this Evolution Muffler is
15,000–17,000 rpm. Refer to the guidelines below to select a propeller for your engine.
apc propEllEr
stocK MufflEr rpM
EVolutIoN MufflEr rpM
rEcoMMENdatIoN
10 x 6
15,300
16,800
YES
10 x 7
14,600
16,300
YES
10 x 8
13,600
15,500
YES
11 x 6
13,600
15,500
YES
12 1/4 x 3.75W
13,100
15,000
YES
10 x 9
12,900
14,900
NO
11 x 7
13,000
14,800
NO
11 x 8
11,800
11,800
NO
12 x 6
12,500
12,500
NO
cautIoN: Propellers that do not turn a maximum of 15,000 rpm on the ground are not recommended. An oversize propeller
causes a tuned system to overheat much faster than a non-tuned system. When a propeller is used that is too large
for the engine to reach its tuning rpm with this Evolution Muffler, the engine will run hotter and possibly slower than
with a stock muffler. Use a higher rpm propeller to prevent engine overheating.
repair: only Horizon Hobby service center may repair this muffler.
WarraNty aNd rEpaIr polIcy
Warranty period
Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the “Product”) will be free from
defects in materials and workmanship at the date of purchase by the Purchaser.
limited Warranty
Horizon reserves the right to change or modify this warranty without notice and disclaims all other warranties, express
or implied.
(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.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MER-
CHANTABILITY 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 im-
proper 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).
WarraNty sErVIcEs
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 productsupport@
horizonhobby.com, or call 877.504.0233 toll free to speak to a Product Support representative.
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.
country of purchase
Horizon Hobby
address
phone Number/Email
United States
Horizon Service Center
(Electronics and engines)
4105 Fieldstone Rd
Champaign, Illinois
61822 USA
877-504-0233
Horizon Product Support
(All other products)
4105 Fieldstone Rd
Champaign, Illinois
61822 USA
877-504-0233
United Kingdom
Horizon Hobby Limited
Units 1-4 Ployters Rd
Staple Tye
Harlow, Essex
CM18 7NS
United Kingdom
+44 (0) 1279 641 097
Germany
Horizon Technischer Service Hamburger Str. 10
25335 Elmshorn
Germany
+49 4121 46199 66
France
Horizon Hobby SAS
14 Rue Gustave Eiffel
Zone d’Activité du Réveil Matin
91230 Montgeron
+33 (0) 1 60 47 44 70