20GX2Evolution® Gas Engines
10 11Engine Break-inYour new engine needs to be broken-in to ensure a long life of all the components. This engine features a piston ring design, whic
11TelemetryTelemetry is a huge asset to help you tune your engine. The ignition module is even capable of communicating with Spektrum telemetry system
12 13High-Speed Needle AdjustmentBecause of the small amount of fuel actually needed for this engine, needle adjustments need to be made in small incr
13Low-Speed Needle AdjustmentIf you have properly set the idle needle, the low-speed setting should be within 1/16th of a turn from perfect. Remember
14 15Troubleshooting GuideIf the Engine Does Not Start• Check and use a new spark plug if needed.• Check fuel lines.• Check for proper mechanical f
15Parts List# Description Part1 Cylinder Screw (6) EVO1201232 Spark Plug EVOG103503 Cylinder Head EVOG201034 Cylinder Head Gasket (2) EVO1201125 Cylin
16 17# Description Part38 Throttle Arm EVO4686639 Throttle Barrel (B) EVOG15813B40 Low-Speed Adjustment EVOG1584441 Main Carburetor Body (B) EVOG15827
172-YEAR LIMITED WARRANTYWhat this Warranty Covers - Horizon Hobby, LLC (Horizon) warrants to the original purchaser that the product purchased (the “
18 19Warranty and Service Contact InformationCountry of PurchaseHorizon Hobby Contact Information AddressUnited States of AmericaHorizon Service Cente
19Compliance Information for the European UnionDeclaration of Conformity (in accordance with ISO/IEC 17050-1)No. HH2014060503Product(s): 20GX2 Gas En
2 3All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC. For up-to-date prod
©2014 Horizon Hobby, LLC. Evolution, the Evolution logo, Hangar 9, DSMX and the Horizon Hobby logo are registered trademarks of Horizon Hobby, LLC. Th
3• Always perform a range check prior to flight. • Always use the throttle linkage to shut off the air or turn off the engine power switch to stop th
4 5IntroductionCongratulations on your purchase one of the exciting new engines in the Evolution® small block gas engine series. All of the Evolution
51. Secure the engine mount on the airplane firewall. Tighten the engine mount screws in the firewall.2. Install the engine on the engine mount accordi
6 7Installing the MufflerThe muffler mounting accessory package includes mounting screws (2), lock washers (2), muffler gaskets (2) and L- wrenches (3).
7Adjusting the Throttle Opening1. Lower the throttle and center the throttle trim.2. Adjust the length of the throttle linkage until the throttle is
8 9Connecting the Electronic IgnitionThe Evolution Electronic Ignition Assembly is designed and engineered specifically for the small block engine ser
9FuelThis engine requires a mix of 20:1 gas to oil lubricant ratio for break-in and a mix of 32:1 gas/oil ratio for normal operation in order to last
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