Evolution EVOE10GX User manual

10cc
Evolution®Gas Engines
GAS/PETROL

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NOTICE
All instructions, warranties and other collateral documents are subject to change at the sole
discretion of Horizon Hobby, Inc. For up-to-date product literature, visit horizonhobby.com
and click on the support tab for this product.
The following terms are used throughout the product literature to indicate various levels
of potential harm when operating this product:
NOTICE: Procedures, which if not properly followed, create a possibility of physical property
damage AND a little or no possibility of injury.
CAUTION: Procedures, which if not properly followed, create the probability of physical
property damage AND a possibility of serious injury.
WARNING: Procedures, which if not properly followed, create the probability of property
damage, collateral damage, serious injury or death OR create a high probability of
superficial injury.
Meaning of Special Language
WARNING: Read the ENTIRE instruction manual to become familiar with the features
of the product before operating. Failure to operate the product correctly can result
in damage to the product, personal property and cause serious injury.
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.
Do not attempt disassembly, use with incompatible components or augment product in any
way without the approval of Horizon Hobby, Inc. This manual contains instructions for safety,
operation and maintenance. It is essential to read and follow all the instructions and warn-
ings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid
damage or serious injury.
CAUTION: This product can become extremely hot when in use, which could lead
to burns.
Age Recommendation: Not for children under 14 years. This is not a toy.
Safety Warnings
Model engines produce a substantial amount of power, which can create unsafe situations if not
used correctly. Always use common sense and observe all safety precautions when operating,
handling or performing any procedure involving your engine. Failure to follow safety precautions
could result in serious injury and property damage.
• Always ensure spectators, especially children, are at least 30 feet away when running
the engine.
• Always ensure that the propeller is securely attached to the engine shaft and all retaining
fasteners are tightened properly before EACH flight. Use of blue threadlock to tighten nuts
is advisable.
• Always keep small parts out of the reach of children as they can be choking hazards.
• Always secure the airplane before powering the engine.
• Always keep your face and body away from the path of the propeller blades when starting
or running your engine.
• Always stand behind the propeller when making carburetor adjustments.
• Always wear safety glasses or goggles when starting and running your engine.

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• Always keep your fuel in a safe place away from sparks, heat or anything that can ignite.
• Always ensure the aircraft is secure and will not move once the engine is started.
• Always rebind your transmitter to your receiver(s) after setup and before rst ight.
• Always ensure the throttle failsafe is set to low throttle in your transmitter.
• Always perform a range check prior to ight.
• Always cut off the fuel supply (pinch or disconnect the fuel line to the carburetor) or use
the throttle linkage to shut off the air in order to stop the engine.
• Never use hands, ngers, or any other body part to stop the propeller.
• Never throw any object into a propeller to stop it.
• Never run the engine in the vicinity of loose small objects, such as gravel or sand, to avoid
the propeller uncontrollably throwing such materials.
• Never wear loose clothing or a loose neckstrap when operating your model engine as these
items could become entangled in the propeller.
• Never have loose objects such as screwdrivers, pencils, etc. in your pockets when operating
your model engine. These could fall into the propeller.
• Never allow fuel to come into contact with eyes or mouth. Gasoline and other fuels used
in model engines are poisonous.
• Always ensure gasoline and fuel are stored in a clearly marked container away from
the reach of children.
Precautionary Guidelines
• Always mount the engine securely on a bench mount or high-quality engine mount.
• Always use the correct size and pitch of propeller for your engine. Refer to the Propeller Chart
in this manual.
• Always conrm proper balance of your propeller prior to installation of the engine. Failure
to do so could result in damage to the engine and/or airframe.
• Always utilize an electric starter to start your engine.
• Always discard any propeller that is nicked, scratched, cracked or damaged in any way.
• Always run your model engine in a well-ventilated area. Model engines can produce possibly
harmful carbon monoxide fumes.
• Always store your fuel safely in a sealed, water-resistant container.
• Always store fuel in a cool, dry location. Do not allow fuel containers to come in direct
contact with concrete, as the fuel may absorb moisture.
• Always responsibly discard fuel if there is condensation and/or water inside the fuel
container.
• Never return unused fuel from the fuel tank back into the fuel container.
• Never attempt to repair or modify a propeller beyond its intended use.
• Never handle model engines, mufers and/or tuned pipes until they have had time to cool.
They can become extremely hot when in use.

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Introduction
Congratulations on your forethought and decision to purchase the Evolution®brand’s first small
block gas engine in our new series. All of the Evolution brand gas engines are designed from the
start to provide you with excellent performance at a fraction of your previous operating costs. We
have painstakingly designed and tested each engine to insure a hassle free experience without
giving away anything in expected performance or durability. This manual, when read and fol-
lowed will guide you through the simple steps to your success. Welcome to the Evolution family.
Small Block Gas Engine Design
Starting with our already proven 60NX glow engine, enjoyed by thousands around the world, we
endeavored to take that excitement and experience into the realm of gasoline fuel to provide
you with a complete package; great performance and low cost of operation.
Step 1 Start with a great engine. The 60NX was rst announced and sold in July 2009 and has
since provided thousands of users excellent performance.
Step 2 Design a new carburetor system that will be reliable and provide for hassle free use by the
owners. This new carburetor, with already proven technology, was modified to fit in the
available space in front of the cylinder and the unique needs of a gasoline fueled engine.
Built on to the front of the carburetor, is a crankcase-pressure driven regultar system.
This system takes fuel a muffler pressurized tank and meters it properly in all attitudes of
flight. A new cat’s eye style fuel metering system was added to allow for more contral-
lability to the low and mid-range throttle positions.
Step 3 Design the proper muffler system to handle the extra heat and expansion of the burnt gas
mixture when compared to a glow system. These changes included adding volume to the
muffler, including a much larger muffler through-bolt to handle the heat and stress, and
enlarging the outlet of the muffler to minimize backpressure while still providing noise
reduction.
Step 4 Design operating accessories that enhance the user experience. During our extensive
2-1/2 year testing program we discovered a lot of new techniques and obstacles that are
unique to gasoline fueled small block engines.
• Because the amount of fuel consumed is one third that of a comparable sized
glow engine the construction and reliability of the fuel delivery system to the
carburetor becomes three times as critical. Microscopic pieces of dirt that used
to safely pass through the larger fuel passages of a glow carburetor will wreak
havoc on a gasoline system. By using a quality inline filter like our Inline Filter
(EVOA105) we can take care of the dirt problem. One of these is included with
your engine.
• The same holds true for air bubbles from the tank or any small leak in the fuel
tubing; what would pass harmlessly through a glow carburetor simply is not tol-
erated in a gasoline system because the air bubbles are effectively three times
the size they used to be. We have developed and sourced an excellent felt filter
clunk that when used in the tank stops all the air bubbles from moving into the
fuel delivery tubes. This felt clunk is critical to successful and reliable operation.
One of these is included with your engine.
• We found that high mufer temperatures would destroy normal Tygon®tubing
(the go-to choice for gasoline engines) within minutes. We found that Neoprene
tubing would withstand the temperatures but it tended to degrade quickly
in use so we sourced the proper sized Viton® tubing (Gasoline Fuel Tubing
EVOA104) which withstands not only the high temperatures but its durability
is much greater than that of either Tygon or Neoprene. The added bonus is that
it fits and holds well to the fuel fittings without any need for additional wire or
tie-wrap keepers. We have included a supply of this tubing with your engine.

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High-Speed
Needle
Muffler
Spark Plug
Muffler Nipple
Fuel Nipple
Installing the Engine
1. Secure the engine mount on the airplane
firewall. Tighten the engine mount screws
in the firewall.
2. Install the engine on the engine mount
according to the airplane manufacturer’s
instructions.
WARNING: Tighten all engine
mounting screws before each flight. If
you do not tighten the engine
mounting screws, the screws may
vibrate loose and cause the engine to
separate from the fuselage.
Low-Speed Needle
Needle Limit Collar
Muffler Spark Plug
Throttle Arm
Included Content
ENGINE
• Mufer (EVO10601)
• Mufer Screws & Gasket (EVO100E46A)
• Spark Plug (EVOG10350)
• Evolution/Spektrum™Telemetry RPM
adapter cable (EVOA107)
• Med Gas Fuel Tubing (EVOA104)
• In-Line Fuel Filter (EVOA105)
• In-tank Felt Filter/Clunk (EVOA106)
OPTIONAL ITEMS
• Tachometer (HAN156)
• Propeller 10 x 6 (EVO10060) for break-in;
12 x 6 (EVO12060) for normal ight
• EVOM1 High Performance Tuned Mufer:
EVO46-60

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1. Use a secure method to attach the
throttle linkage to the throttle arm on the
carburetor.
2. Power on the transmitter and receiver.
3. Move the throttle stick to the middle stick
position.
4. Adjust the throttle arm so the arm is 90
degrees to the throttle pushrod.
5. Center the throttle servo. Install a servo arm
with a hole 11mm (7/16 in) from the center
of the arm.
6. Use a clevis to attach the throttle linkage to
the servo arm.
11mm
1.5mm
Installing the Muffler
The muffler mounting accessory package in-
cludes mounting screws (2), lock washers (2),
muffler gaskets (2) and L- wrenches (2).
1. Put a lock washer on each of the muffler
screws. Push the muffler screws through
the cylinder head.
2. Place the muffler gasket over the engine
mounting screws.
3. Align the mufer gasket with the exhaust
opening and the muffler mounting screws.
4. Tighten the muffler screws.
Important: Tighten the muffler screws after
five tanks of fuel. The muffler screws may
loosen from heat and vibration.
It is important that you tighten the muffler
through-bolt after each of the first three,
full tank engine runs. The heat will cause ex-
pansion of the through-bolt and muffler body
parts. After the third tightening, no further
muffler loosening should occur.
To tighten the muffler through-bolt:
1. Loosen the muffler lock nut.
2. Tighten the muffler through-bolt screw.
3. Tighten the mufer lock nut.
Connecting the Throttle Linkage

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Adjusting the Throttle Opening
1. Lower the throttle and center the throttle
trim.
2. Adjust the length of the throttle linkage
until the throttle is open 1mm.
3. Move the throttle stick up to conrm the
throttle opens. If the throttle does not
open, reverse the throttle channel in your
transmitter.
4. Move the throttle stick and throttle trim
down to confirm the throttle closes.
5. If you reversed the throttle channel in your
transmitter and you are using a 2.4GHz
radio system, you must re-bind your radio
system to set the correct failsafe position.
Attaching the Fuel Lines
Fuel Line
Vent Line
1. Connect medium diameter Viton®fuel line
to the carburetor and the fuel tank supply
line.
2. Connect medium diameter Viton fuel line
to the muffler pressure nipple and the fuel
tank vent line.
Vent Line
Fuel Line
RECOMMENDED PROPELLERS
10 x 6–13 x 8 (12x6 has tested to be the best
performer with this engine although the
performance is very good throughout the
recommended range)
1. Remove the prop nut and prop washer from
the crankshaft.
2. Install the spinner backplate, followed by
the propeller, prop washer and prop nut.
3. Cover the propeller with a cloth and use an
adjustable wrench to tighten the prop nut.
4. Install the spinner cone. Make sure the
spinner cone is not touching the propeller.
Trim the propeller opening if necessary.
5. Tighten the spinner screw(s) to secure the
spinner cone.
Attaching the Propeller and Spinner

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Connecting the Electronic Ignition
The Evolution Electronic Ignition Assembly is designed and engineered specifically for the
small block engine series. It is smaller and lighter so it fits into tighter spaces of the airplanes
the engines are designed to power. The battery voltage required is between 4.8v (4-cell Ni-MH
pack) and 8.4V (2S Li-Po battery) and no voltage regulators are needed with any of these
batteries. We recommend a 2S Li-Fe battery (such as the Team Orion®Avionics Li-Fe Receiver
Pack 1300mAh 6.6V (ORI60503)) and we have done extensive testing with these packs. The
maximum amp draw at full throttle is 450mAh, and our more typical average has been between
250–300mAh.
The assembly consists of:
• Ignition module with battery connector, ignition sensor connector, tachometer readout
connector and spark plug connector.
• Ignition sensor (already attached to your engine)
• Sensor magnet (already installed in the prop drive hub of your engine)
Mounting Your Electronic Ignition
• You can mount the unit in any orientation
and place that is convenient for your
installation. The module is sized to con-
veniently fit into the tank compartment of
most 46–50 sized airplanes alongside or
underneath the recommended 6–8 oz fuel
tanks. You can also mount it to the rewall
or under the engine firewall extension if
your airplane is so equipped. Keep in mind
that it should be mounted away from the
heat of the muffler.
• Secure the ignition module to your chosen
location with foam padding to provide
vibration isolation. We typically mount it
conveniently with tie wraps after wrapping
the ignition in lightweight 1/4-inch foam
rubber.
• You may need to route both the spark plug
connector wire and the ignition sensor
wire through the firewall so be sure to plan
ahead and provide adequate sized holes
that will allow you to pull either the ignition
sensor connector or the spark plug cap
connector through the holes for later
ignition removal.
• Mount a good quality radio receiver type
switch between the ignition unit and the
battery. Mount this switch in a convenient
place on the outer fuselage close to the
front of the airplane to make it easy to turn
the ignition on and off. Being able to easily
shut off the ignition is an important safety
consideration.
• Connect the ignition sensor wire to the
ignition module. The sensor wire will only
fit into one of the connectors so you cannot
connect it wrong.
• Connect the ON/OFF switch to the battery
connector lead of the ignition module. This
connector is the red connector.
• If desired you can connect either the
separately available tachometer readout or
the included Evolution/Spektrum Telemetry
Adapter Cable (EVOA107) to the tachometer
readout connector. Plug the other end of
the adapter cable into your telemetry mod-
ule’s rpm input port.
• Connect the spark plug connector to the
spark plug. This adapter has a push on and
rotate clockwise 1/8 turn locking
mechanism to insure a solid connection.
Make sure you charge your ignition battery
and are now ready to operate your electronic
ignition with the engine.

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Fuel
This engine requires a mix of 20:1 gas to oil
lubricant ratio to operate and last a long
time. The bronze bearing at the bottom end
of the conrod depends upon this lube ratio to
operate properly. Do not go higher than a 20:1
gas/oil ratio or the warranty on your engine
will be voided.
To properly mix the fuel add 6.75 oz of good
quality 2-stroke oil to one gallon (or 53 mL
of oil to one liter) of 87–93 octane fuel.
(EVOX1001Q Evolution 2-stroke oil is
recommended) We prefer to add the oil rst
to our fuel container and to add the gasoline
second. This helps to insure a good mixture of
the oil with the fuel at the outset.
We have tested our own Evolution 2-stroke oil,
Valvoline, Shell, RedLine and Husqvarna oils.
Other quality 2-stroke oils should work as
well. Do not use Amsoil synthetic oil in
any form.
Fuel Delivery System
It is very important to properly construct
your fuel supply system to the engine to
avoid operating problems with our engine.
Our experience has shown that many seem-
ingly engine related operating problems are in
fact fuel delivery problems, not engine related
problems.
Fuel Filtering - Because of the incredibly small
amount of fuel that is being used by this
engine, filtration of the fuel is mandatory in
three different spots in the system:
1. Between the fuel jug and the tank
2. Within the fuel tank itself (with a ltered
clunk EVOA106)
3. Between the fuel tank and carburetor (with
an in-line fuel lter EVOA105.
Both of these lters (2 and 3) are included in
the engine package.
Tank Location - Because muffler pressure
is used to provide the pressurization to the
fuel regulating and metering carburetor, the
tank still needs to be mounted in line with
the carburetor, and as close to the rear of the
engine as possible. Care taken in mounting
the tank as described will provide trouble free
operations in all flight attitudes.
Tank Choice and Construction – Choose a
tank between 6–8 oz (170–240 mL). These
tanks will yield 17 minutes (for the smaller
tank) to 24 minutes (for the larger tank) of full
throttle flying time.
The clunk will not move around well if the tank
is smaller than 6 oz (170mL). Any tank larger
than 8 oz (240mL) will result in carrying extra
weight to no benet (unless you like to y for
a long time).
• Ensure you use a tank stopper made for
use with gasoline and/or smoke oil.
• We suggest a three-line tank system; one
for the line to the carburetor with the clunk
attached internally, one for the muffler
pressure to the tank, and one dedicated
to fueling/defueling the tank. We try to
avoid the T-fittings and other inline valves
because they can be a possible source of
air/fuel leaks.
• Ensure you use the provided Viton tubing in
all the plumbing of the tank, externally and
internally.
• Ensure you use the included felt lter clunk
inside the fuel tank.
• Ensure you use the included inline lter
between the tank and the carburetor.
• Ensure there is a good seal system for
the dedicated fueling/defueling line. We
highly recommend the HAN116 Fuel Filler
Assembly for its sleek look and ease of use
when installed on your airplane.

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Engine Break-in
Your new engine needs to be broken-in to ensure a long life of all the components. The piston
and liner construction piston and liner construction is true ABC (Aluminum piston, Brass
Chromed liner), which requires a specic break-in procedure that cannot be fully accomplished
with bench runs.
Because the ABC piston and liner rely on the close fit of the piston to the liner to provide the
compression seal, the engines are built with a taper to the liner that requires the piston to
match the taper during the break-in process. For this to be accomplished, this process requires
repeated heating and cooling cycles, and must be done at a needle setting that is only slightly
rich of peak.
Breaking in an ABC piston and liner by running it rich does not provide the necessary parts
growth to accomplish the needed piston and liner fitting. Using a rich needle setting does not
allow for proper expansion of the liner, resulting in the connecting rod receiving the full force
of the piston when it moves past Top Dead Center (TDC). Allowing the engine to heat up will
expand the liner and reduce the load on the connecting rod, ensuring a proper engine break-in.
Doing the break-in with a light load on the engine (e.g. a smaller than normal propeller) makes
this task much easier. Please follow the steps below to ensure a successful experience.
1. Do the break-in process mounted on your
airplane and in the air.
2. Use a 10 x 6 prop for your break-in process.
This provides a light load, and high rpm
that when matched with the heat of the
engine will break-in the engine properly.
3. Use the proper recommended fuel with a
20:1 gas to oil ratio.
4. The proper break-in flight procedure is to
fly the airplane at full throttle through a
series of gure eight maneuvers (i.e. Cuban
Eight). These maneuvers in particular ben-
efit the engine because when climbing the
additional load on the engine will increase
the temperature and when diving the air-
plane the lighter load and higher rpm will
decrease the temperature, thus providing
the heating/cooling cycles required for the
break-in process.
5. Run two full tanks with the 10 x 6 prop and
then move to an 11 x 6 prop and repeat the
next two tanks.
6. You should now be ready to put on any of
the larger props and enjoy your engines full
performance.
Do not worry about an engine setting being
too rich during this process. When set
correctly, the engine will occasionally sound
as if it is misring (which it is). During the
climbing maneuvers this should go away and
might return during the diving maneuvers. If
it does not go away during the climbs then
land and adjust the high-speed needle by 1–2
clicks to the leaner position and take off and
fly again. Enjoy the break-in process—you are
doing a lot of flying.