Evolution Engines
45GX2/58GX2
USER GUIDE
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8103.3_EVO_4558.manual.indd
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6/16/06 10:23:12 AM
Mounting the Engine
Fuel for the Evolution Gas Engine
Most model airplane designs make provision for an engine
mount. It is extremely important that the engine mount be
securely attached to the airplane’s firewall and that the engine
is securely attached to the engine mount. Follow the instructions
included with the airplane for mounting the engine. The engine
should be fastened in place with 4 screws. Use 1/4” or 6mm
screws. If you decided to fasten the engine using a flexible motor
mount, always choose parts with enough solidity and strength.
Make sure all screws are tightened and regularly check that they
remain tight and in good condition.
The Evolution gas engine has been designed to run on a mixture
of high-quality unleaded gasoline and synthetic oil intended for
racing 2-stroke gasoline engines. For the break-in period of the
new engine, mix the fuel in a ratio of 30 parts gasoline to 1 part
lubricant. After break in, use a ratio of 40 parts gasoline to 1
part lubricant.
Selecting a Suitable Propeller
The Evolution 45GX and 58GX have been designed to generate
maximum power at 6100–6300 rpm, according to the type
of exhaust used. If you wish to utilize the maximum power
output, choose a propeller which will allow the engine to reach
these revolutions, or slightly lower revolutions (The engine will
unload in the air depending on the aircraft speed and propeller
selected).
Important: Air is necessary to cool the engine during operation.
Make sure that sufficient air circulation through the cowling is
provided. As a basic reference, the outlet area should be 3–5 times
the area of the inlet area to provide adequate cooling.
Throttle Linkage
We do not recommend using propellers that allow the engine to
reach more than 7500 rpm on the ground.
Carefully attach the throttle linkage to the engine using a ball
link on the carburetor. Make sure that the linkage is free to
operate from low throttle to high throttle and confirm that the low
throttle setting on the transmitter closes the carburetor butterfly
to the low idle position. Adjust the length of the pushrod until full
throttle opens the carburetor butterfly fully, while low throttle, low
trim completely closes the butterfly.
Suggested Propeller Dimensions
These engines (45GX2 and 58GX2) are designed for optimum
performance and torque when operated between 6100–6400
rpm. Choose your propeller according to the chart and to achieve
approximately 6300 rpm on the ground for best performance
and the lowest noise signature. Maximum horsepower occurs
between 7200–7400 rpm, but expect much higher propeller
noise at these tip speeds.
Attaching the Fuel Lines
Use medium gasoline-compatible fuel line in the fuel tank as
well as the supply line to the engine.
Aerobatics
Scale flying
Two-blade
Three-blade
Two-blade
22x8 22x10
21x10
23x8 23x10 24x8 24x10
45GX
58GX
21x12 22x8 22x10
24x10 26x8 26x10
24x8 24x9 24x10 24x12
25x7 25x8 25x9 25x10 25x12
26x7 26x8 26x9 26x10
22x12 24x9 24x10
Three-blade
24x12
ꢁ
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6/16/06 10:23:13 AM
Fuel for the Evolution Gas Engine
The Evolution® Gas engine has been designed to run on a mixture of high-quality unleaded gasoline and synthetic oil intended for racing
2-stroke gasoline engines. For the run-in period of the new engine, mix the fuel in a ratio of 30 parts gasoline to 1 part lubricant. After
run-in, use a ratio of 40 parts gasoline to 1 part lubricant.
Starting the Engine
Air Pressure Inlet
The new Evolution Engine carburetor comes adjusted to a
basic setting. This setting should be maintained during the
initial break in runs.
Adjusting Needle L
Adjusting Needle H
Before you first start the engine, make sure that the spark
plug is screwed in and tightened and that the plug socket
is fitted in place and fastened down properly. Fix the ignition
sensor in the proper position above the magnet with the
screws enclosed. Follow the directions in the Ignition System
addendum to program the ignition module in your model.
Choke Lever
Pressure Inlet
58GX Carburetor Shown
Carburetor Adjustments ꢂ5GX
Important: Never turn the engine over with the ignition turned
on unless the spark plug is inserted in the plug socket. This
could lead to ignition damage.
Basic setting: Adjust needle (L) for low rpm range 2 turns.
Adjust needle (H) for high rpm 1 turn and 30 minutes.
Carburetor Adjustments 58GX
Basic setting: Adjust needle (L) for low rpm range 1 turn and 45 minutes.
Adjust needle (H) for high rpm 1 turn and 45 minutes.
Starting With Easy Start Feature
1) Make sure the ignition switch is on and the throttle is set at a slightly high idle setting. Be sure to have a helper hold the model
securely. The Easy Start feature will have the choke closed at this time. Give the propeller a few quick flips. If the engine starts, the
Easy Start system will automatically open the choke, and modulate its position as necessary to keep the engine running until warm.
2) If the engine does not start immediately, please note the following:
a) The Easy Start System will keep the choke closed for the first 4 flips of the propeller, then;
b) The choke will go to a half-open position for the next 4 flips of the propeller, then;
c) The choke will be fully opened for the next 4 flips of the propeller, then;
d) The Easy Start system will start the entire sequence over again by closing completely the choke.
3) The above steps assure a situation that will not flood the engine, and allow for easy starting procedures, whether it is your first, or
your tenth, flight of the day.
ꢂ
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Starting the Engine Continued
Starting Without Easy Start Feature
3) If the engine does not start, leave the throttle at the high idle
position, turn the ignition off, then on and close the choke
valve. Start the engine with throttle at the fast idle position
and the choke valve closed. The engine should fire and quit. If
it does, repeat step 2 above.
1) When you are ready to start your engine, make sure that the
ignition is switched off, the choke valve is closed and the
throttle valve is partly open. Confirm that fuel is filling the
fuel line to the carburetor then switch the ignition to the on
position. Flip the propeller smartly until the engine fires. With
the choke in the closed position, the engine will fire then quit.
4) At this point, if the engine still will not start, unscrew the
spark plugs and check the contacts. Clean any possible
excess fuel (i.e. an indication of engine flooding) and screw
them in again. Further starting should only be done with the
throttle at idle position and the choke in the open position. If
the plug is dry, then probably not enough fuel has been drawn
into the carburetor. If that is the case, check for proper fuel
feed and then return to the instructions given in paragraph 1.
2) Open the choke valve and set the throttle at a slightly high
idle position. Be sure to have a helper hold the model securely.
Give the propeller a few quick flips. When the engine starts,
allow it to idle for 30–45 seconds in order for it to warm up
to operating temperature. At this point you can proceed to
test the carburetor settings before flying your model. See the
following section regarding carburetor adjustment.
Having started the engine, leave it running for about 5 minutes at a higher idle speed. Then run it for about 20 minutes, while
changing revolutions from idle to 1/2–3/4 of the range and shortly holding each position—gradually prolong the holding periods. After
10 minutes of operation, open the throttle to maximum for a period of about one minute. At this point, stop the engine and let it cool
down. Then restart it and check the adjustment. If everything is all right, you can make your first flight. During the first few flights. do
not overload the engine and do not let it run at high revolutions for long periods of time (very important during hot weather). Use up all
the fuel that was mixed with the oil that is included with your engine. From then on, fuel and oil should be mixed in the proportion 40:1.
Carburetor Adjustment
First, start and warm the engine for 30–45 seconds before attempting to adjust the carburetor. In order to confirm that your engine is
properly adjusted, you should follow the procedure below.
1) Move the throttle from idle to 2/3 of the full throttle position quickly (fast acceleration). Then repeat three times – if the engine accelerates smoothly, go to
step 3 below. If acceleration is not smooth, go on to step 2.
2) Faulty acceleration and a tendency to quit is usually attributable to a poor fuel mixture in the medium rpm range. Stop the engine and recheck the fuel
feed (the fuel line must not be pinched or broken). Restart the engine and test acceleration again. If the problem persists, adjust the carburetor. Open
the low speed needle by 1/8 turn and retest. If acceleration is smooth, open the needle by another 1/8 turn—this should be done because the needle was
previously set too lean; if atmospheric conditions have changed recently you may have to readjust the needle. If the engine continues to not accelerate
properly, open the low speed needle by 10 minutes. If the engine’s operation does not improve, shut it off and check the basic setting, restart the engine
and test the acceleration. If the engine runs correctly, go to step 3. If it continues to not accelerate properly, open the low speed needle by another 10
minutes. If acceleration is faulty, the defect is likely to lie somewhere other than an incorrect adjustment.
3) If the engine accelerates correctly, according to the above test, set it at idle speed and accelerate to full speed. Repeat twice more. If the engine functions
correctly, go to step 4. If it cuts out, open the low speed needle by another 1/8 turn more.
4) If the engine reacts correctly set it at full speed. If revolutions do not drop, the engine has been adjusted successfully. If revolutions seem to drop, open the
high-speed needle by approx. 5–10 minutes.
Caution! The engine must be stopped while you adjust the carburetor in order to prevent injury by the propeller.
5
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6/16/06 10:23:14 AM
Troubleshooting Guide
If the engine does not start
Mechanical Faults
-
check and use a new spark plug if needed.
If the engine can not be turned over easily
(Check the spark: Put the plug into the cable end and by turning
the engine you’ll see the necessary spark. Note: The plug must
touch a metal part of the engine.)
- a likely cause is the piston in the cylinder is seized: loosen
and unscrew the cylinder bolts.
- check fuel lines.
- check for proper mechanical function by turning the
engine over.
- carefully remove the cylinder.
- visually examine the piston and crankcase to find the likely
cause of the engine’s mechanical problem.
- check that the carburetor is correctly installed.
- remove the carburetor cover from the feed side; check
the filter and blow off carburetor with compressed air
(Caution: When using compressed air, use eye protection.);
when re-assembling be careful to maintain the proper order of
the components.
Note: Mechanical repairs must always be completed by a
professional service department.
- check the vacuum feed line.
Engine Specifications
ꢂ5GXꢀ
Bore
ꢁ8mm
ꢁ8mm
Maximum power output**
Maximum torque**
5.ꢀ hp / ꢃꢀ00 rpm
ꢂ.ꢀ ft-lb / ꢃ100 rpm
Stroke
Displacement
Weight without ignition*
ꢂ5cc / ꢀ.ꢃ cu in
1ꢀ90 g / ꢂ5.5 oz
Gasoline
Unleaded 95-octane
Weight of ignition unit
RPM range
1ꢃ5 g / 5.8 oz
1000–7500 rpm
Lubrication
Oil w/gasoline
in mixture 1:ꢂ0
58GXꢀ
Bore
ꢂꢀmm
ꢂꢀmm
Maximum power output**
Maximum torque**
8.5 HP / ꢃ950 rpm
5.1 ft-lb / ꢃꢂ00 rpm
Stroke
Displacement
Weight without ignition*
58cc / ꢁ.ꢃ cu in
18ꢀ0 g / ꢃꢂ.ꢀ oz
Fuel
Unleaded gasoline
Weight of ignition unit
RPM range
1ꢃ5 g / 5.8 oz
1000–7500 rpm
Lubrication
Oil w/gasoline
in mixture 1:ꢂ0
* The value in the table above stands for the weight of a completely assembled engine, including the spark plug, carburetor,
drive washer and prop screws.
** Power output varies with the exhaust used. The value given in the table stands for the maximum available power output.
ꢃ
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ꢂ5GXꢀ Evolution Engine Dimensions
A
B
180mm
122mm
D
C
71mm
78mm
F
E
78mm
G
6.6mm
H
M10x1mm
55mm
58GXꢀ Evolution Engine Dimensions
A
B
190mm
140mm
D
C
75mm
78mm
F
E
78mm
G
6.6mm
H
M10x1mm
55mm
7
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6/16/06 10:23:16 AM
Evolution Engines Easy Start Ignition System
The spark ignition included with your Evolution® gas engine is a modern generation electronic ignition. There are many useful
functions built into the microprocessor of this unit.
In addition to the basic ignition functions, the unit has a FAIL-SAFE feature: After 90 seconds of inactivity it automatically switches to
an inactive state. In order to restart normal operation, it is necessary to turn the battery switch off and then back on. This function will
preserve battery life should the switch be left in the on position during inactivity.
Installation of the Easy Start Ignition Unit
While installing the ignition unit in your model, be careful to have all parts that are connected to the unit and the engine
situated as far as practical from the radio receiver and radio antenna. The throttle servo should be mounted a distance of
8–12 inches from the engine. The spark plug cable must not touch any part of the model structure as vibration may damage
the cable. If this is not practical, it will be necessary to provide an insulation material for the cable. The ignition unit itself
should be wrapped in foam rubber to prevent engine vibration from damaging the electronics. All components must be
protected from contact with engine fuel.
ꢀ
1
ꢁ
1
ICU–S
6–8.4V
ConnectLEDindicatortotheignition
box(red/blackwireto“+”).
Usingtheincludedconnector,plugyour
batterypackintotheignitionbox.
Fivesecondsafterconnectingthebat-
tery,theLEDindicatorshouldgoout.
IftheLEDisblinkingafteryouconnect
thebattery,thebattery’svoltageis
toolow.
Ignition
LED
Programmingcable
ꢀ
ꢁ
LED
LED Blinking Patterns
Technical data
Weight
155 g
Power supply
2x Li-lo/Li-Po
6x Ni-Cd/Ni-MH
5º
light
dark
Pre-ignition point
Location of the magnet
Minimum battery capacity
LOW
BATTERY
240º / 120º
600mAh
SLEEP
MODE
Other features
Easy Start function
SHORT
Choice of pre-ignition curve
SILENCER
Customizable pre-ignition curve*
Sleep mode after 90 seconds of engine inactivity
Battery level signalization
LONG
SILENCER
Ignition goes off if engine runs counterclockwise
*will be released later
8
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6/16/06 10:23:29 AM
Programming Easy Start Function and Pre-Ignition Curve
1
Ignition
LED
Programmingcable
Ignitionbattery
Transmitter
Receiver
Receiverbattery
Servo
1
ꢀ
ꢁ
ꢀ
ꢂ
5
5
7
ꢁ
ꢃ
7
8
ꢃ
ꢂ
8
Disconnecttheignitionsystem’s
battery.
ConnecttheLEDindicator.
Connectthethrottlepotentiometer
outlettothethrottlechannelonyour
receiver.
Connecttheauto-chokeservoto
theignitionbox(blackorbrownto
“–”pin).
Switchonyourtransmitter.
Connectreceiverbatterywiththe
receiver.
ShortSilencerChokeSettings
(e.g.,PittsStyle)
1)Usingthethrottlestick,closethechoke
untilitclosescompletely.WaituntiltheLED
blinksonce,indicatingtheignitionhas
memorizedthe“closedchoke”position.
LongSilencerChokeSettings
(e.g.,CanisterorTunedPipe)
1)Usingthethrottlestick,closethechoke
untilitclosescompletely.WaituntiltheLED
blinksonce,indicatingtheignitionhas
memorizedthe“closedchoke”position.
Connectignitionbatterytotheignition.
2)Usingthethrottlestick,openthechoke
valveuntilitisallthewayopen.Waituntil
theLEDblinksonceindicatingtheignition
unithasmemorizedthe“choke
open”position.
2)Usingthethrottlestick,openthechoke
valveuntilitisallthewayopen.Wait
untiltheLEDblinksonceindicat-
ingtheignitionunithasmemorized
the“chokeopen”position.
PROG
SERVO
3)Movethechoketotheclosedposition
andholdthereforanadditional5
seconds,andtheLEDwillblinkrap-
idly,indicatingthattheShortSilencer
Preignitionprogramhasbeenset.
3)Leavethechokeopenforanadditional
5seconds,andtheLEDwillblinkslowly,
indicatingthattheLongSilencerPre-
ignitionprogramhasbeenset.
4)Disconnectthereceiver.
4)Disconnectthereceiver.
Warnings
Alwaysdoarangecheckwiththeenginerunningbeforethefirstflight.Usetheignitiononlyindryconditions.Userecommendednumberandtypeofcellsforeachignition
type.ThisproductisspecifiedforRCenginesonly.Donotremovetheresistercoveriftheignitionison.
WArNING:DANGErOFELECTrICSHOCk(vOLTAGEOvErꢀ0,000v).
WArNING:Themanufacturerisnotresponsiblefordamagescausedbynotfollowingthemanualand/orusewithanythingotherthanRCengines.
WArNING:Becauseofpossibleinterference,ignitionandaccumulatorsshouldbeplacedatleast25cmfromthereceiver.
CAUTION:Useastandardservowithacurrentdrawoflessthan1.5Atooperatethechoke.Servoswithacurrentdrawgreaterthan1.5A,suchasmicroservos,digitalservos
andhigh-torqueservos,consumemorecurrentthantheignitionsystem'scircuitryisdesignedtoprovide.Iftheservoyou'veconnectedquiversorwon'tworkatall,itscurrent
drawisprobablytoohigh.
9
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6/16/06 10:23:48 AM
ꢂ5GXꢀ
Part #
Description
Part #
Description
Part #
Description
EVO30040101 Crankcase
EVO30040701 Piston
EVO30040307 Carburetor Flange Gasket
EVO30040308 Carburetor Flange Screw Set
EVO30041301 Reed Valve Case
EVO30040202 Front Bearing
EVO30040203 Rear Bearing
EVO30040301 Rear Cover
EVO30040702 Piston Ring
EVO30040801 Piston Pin
EVO30040802 Piston Pin Retainer
EVO30040901 Connecting Rod
EVO30040904 Connecting Rod Washer
EVO30041001 Crankshaft
EVO30041302 Reed Valve
EVO30040302 Rear Cover Screw Set
EVO30040303 Rear Cover O-ring
EVO30940304 Pressure Nozzle
EVO30040305 Pressure Nozzle Gasket
EVO3004i0401 Cylinder
EVO30041303 Reed Valve Screws
EVO30041304 Reed Valve Gasket-upper
EVO30041305 Reed Valve Gasket-bottom
EVO30041306 Reed Valve Strap
EVO3004i1101 Prop Drive Washer 45gx2 Type 2
EVO30041102 Drive Washer Key
EVO30041103 Propeller Nut
EVO30041307 Carburetor Screws
EVO30040402 Cylinder Screw Set
EVO30040403 Cylinder Nut
EVO30011002 Electronic Ignition Unit Type 2
EVO30013309 Spark Plug Ngk5812 (Sm Cap)
EVO30941405 Ignition Sensing Fixing Screws
EVO30043225 Carburetor
EVO30041104 Propeller Washer
EVO30041105 Propeller Screw
EVO30041107 Propeller Screw Set
EVO30041109 Propeller Nut Washer
EVO30040306 Carburetor Flange
EVO30040404 Cylinder Gasket
EVO30040405 Exhaust Screw Set
EVO30040406 Exhaust Nut
EVO30040407 Exhaust Flange Gasket
10
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58GXꢀ
Part #
Description
Part #
Description
Part #
Description
EVO30010101
EVO30010202
EVO30010203
EVO30010204
EVO30010301
EVO30010302
EVO30010303
EVO30940304
EVO30010305
Crankcase
EVO30010407
EVO30010701
EVO30010702
EVO30010801
EVO30010802
EVO30010901
EVO30010904
EVO30011001
Exhaust Flange Gasket
Piston
EVO30010307
EVO30010308
EVO30011301
EVO30011302
EVO30011303
EVO30011304
EVO30011305
EVO30011306
EVO30011307
EVO30011002
EVO30013309
EVO30941405
EVO30013227
Carburetor Flange Gasket
Carburetor Flange Screw Set
Reed Valve Case
Front Bearing
Rear Bearing
Piston Ring
Packing
Piston Pin
Reed Valve
Rear Cover
Piston Pin Retainer
Connecting Rod
Connecting Rod Washer
Crankshaft
Reed Valve Screws
Rear Cover Screw Set
Rear Cover O-ring
Pressure Nozzle
Pressure Nozzle Gasket
Reed Valve Gasket-upper
Reed Valve Gasket-bottom
Reed Valve Strap
EVO3001i1101 Prop Drive Washer 58GX2 Type 2
Carburetor Screws
EVO3001i0401 Cylinder
EVO30011102
EVO30011103
EVO30011104
EVO30011105
EVO30011107
EVO30010306
Drive Washer Key
Propeller Nut
Electronic Ignition Unit Type 2
Spark Plug Ngk5812 (Sm Cap)
Ignition Sensing Fixing Screws
Carburetor
EVO30010402
EVO30010403
EVO30010404
EVO30010405
EVO30010406
Cylinder Screw Set
Cylinder Nut
Propeller Washer
Propeller Screw
Propeller Screw Set
Carburetor Flange
Cylinder Gasket
Exhaust Screw Set
Exhaust Nut
11
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© 2006 Manufactured exclusively for Horizon Hobby, Inc. 877-504-0233
8103.3
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