1/8 4WD OFF-ROAD, PRO VERSION COMPETITION BUGGY
Thunder Tiger Corporation guarantees this model kit to be free from defects in both material and workmanship.
The total monetary value under warranty will in no case exceed the cost of the original kit purchased. This warranty
does not cover any components damaged by use or modification. Part or parts missing from this kit must be
reported within 60 days of purchase. No part or parts will be sent under warranty without proof of purchase.
To receive part or parts under warranty,the service center must receive a proof of purchase and/or the defective
part or parts. Should you find a defective or missing part, contact the authorized Thunder Tiger Service/Distributor
nearest you. Under no circumstances can a dealer or distributor accept return of a kit if assembly has started.
WARRANTY
INSTRUCTION MANUAL
No.6223-F
ITEMS REQUIRED FOR OPERATION
CA Glue / Instant Glue
Screw Drivers, Lexan Body Reamer, Hobby Knife,
Lexan Scissors, Rubber Bands.
Glow Fuel, Methanol
10% to 30% Nitro
5% to 18% Caster / Synthetic Oil
Alkaline Batteries (12), AA-size
HexWrenchSet, 1.5mm / 2.0mm / 2.5mm / 5.0mm
TOOLS INCLUDED
INTRODUCTION
Thank you for your purchase of this Thunder Tiger product. You should enjoy many hours of fun and excitement
from this advanced R/C model. Thunder Tiger strives to bring you the highest level of quality and service we
can provide. We race and test our cars around the world to bring you state-of-the-art products.
We offer on-line help on our www.acehobby.com forum and our product specialists are ready to take your call if
you have any technical questions. Please read all instructions and familiarize yourself with the systems and
controls of this model before running. Have fun and enjoy the exciting world of R/C!
1
4-Way, 5-Way Wrench
5-WAY WRENCH
INCLUDED IN USA VERSION
Glow Starter w/ Charger
Fuel Bottle
FUEL BOTTLE
INCLUDED IN USA VERSION
GLOW STARTER
INCLUDED IN USA VERSION
a. Plug the charger into an AC outlet, and then pull on the igniter lever to accept the charging adapter.
b. At this point, the small red LED indicator on the charger should light up indicating the charging sequence
is in progress.
c. When the charging complete, pull on the glow plug igniter lever to unplug the glow igniter.
Charge the new glow plug igniter for 16 to 24 hours on the first charge. For subsequent charges, charge
it about 12 hours before next use.
NOTE:
If the igniter gets warm or hot during the charge, unplug the igniter from charger immediately. A warm /
hot igniter means the igniter is overcharged. Overcharging can damage the internal battery in the igniter;
thus, shortening its life.
CHARGING THE GLOW PLUG IGNITER
2
a b c
Thunder Tiger Optional Part #2165, 1300MAH Glow Starter w/220V Charger.
Thunder Tiger Optional Part #2166, 1300MAH Glow Starter w/110V Charger.
1
a.Contents of the box are secured with reusable zip-ties. To unlock zip-tie, press on the small lever.
b.Pull on the zip-tie while keeping the small lever pressed. Pull the zip-tie out completely.
UNWRAPPING CONTENTS FROM BOX
ab
2
3
b
a
a.Use the supplied wrench to remove all 4 tires/wheels.
b.Turn the wrench to loosen the wheel nuts.
REMOVING TIRES / WHEELS
b
6
a.Install 8 AA-size alkaline batteries into transmitter.
b. Install 4 AA-size alkaline batteries into receiver battery box, and connect the battery connectors from
car and battery box (both of which are red).
c. Use the reusable zip-ties from Step 1 and secure the battery box to battery plate. Install the battery
box with plate onto the two battery posts. Secure with body clips and cut off excess zip-tie.
RADIO BATTERY INSTALLATION
3
a
b
c
a.To glue the tires, peel back the tire from wheel.
b. Place a drop of CA glue into the opening, rotate to the next area without glue, place another drop, and
keep doing this until tire and wheels are glued. Only do this step to one side of tire/wheel at a time.
c.After the CA glue has been applied, place a rubber band on the side the tire/wheel with glue until the
glue has completely dried. Then, repeat the above steps for the other side of the tire/wheel.
GLUING TIRES / WHEELS
4
a
b
c
a.Check the frequency printed on the transmitter crystal.
b. Remove the radio receiver from box with a screw driver. Check the frequency printed on the receiver
crystal, and make sure it matches with the transmitter crystal. Make sure no one will operate on the
same frequency when you are. When there is a radio glitch, it will most likely be caused by improper
crystal, damaged crystal, or people operating on the same frequency . Afterchecking, place the receiver
back in the box and secure the receiver box top.
c.Install the antenna into transmitter.
PREPARING THE RADIO
a
c
5
a
b
c
9
a. Check the radio throttle/brake functions. With the radio transmitter and receiver on, pull the trigger /
push the stick forward. The carburetor should be fully opened and the brake disengaged. To reverse
this function, flip the throttle/brake servo reverse switch.
b. Return the trigger / stick to neutral. The carburetor should be closed to a point where the idle has
been set (see step9&10forsettings), and the brake still disengaged. If not, use the throttle/brake
trim lever to correct it.
c. Push the trigger / pull the stick backward. The carburetor opening should still be the same at neutral,
throttle spring compressed slightly, and the brake engaged.
7
a. When turning radio on, first turn on the transmitter.
b.Then, turn on the receiver. When turning off, first turn the receiver off, then the transmitter off.
c. To reverse the functions of servos, use the small, white servo reverse switches located on side of the
pistol transmitter (or the inset servo reverse switches located at the bottom of the stick transmitter). To
trim the servos on pistol transmitter, use the trim switches on side of the steering wheel (the ST. trims
steering, and the TH trims throttle/brake). On a stick transmitter, the trim levers are located accordingly
around the sticks.
d.For more details, please check the transmitter instruction manual.
RADIO OPERATION
abc
OPERATING RADIO THROTTLE / BRAKE FUNCTION
4
a. Check the radio steering functions. With the radio transmitter and receiver on, turn the steering wheel
/ stick to the right. The front tires/wheels should turn right accordingly. If not, flip the steering servo
reverse switch.
b. Return the steering wheel / stick to neutral. The front tires/wheels should point straight forward. If not,
use the steering trim lever to correct it.
c.Turn the steering wheel / stick to the left. The front tires/wheels should turn left accordingly.
abc
OPERATING RADIO STEERING FUNCTION
8
10
a.
To set the throttle/ brake linkage, first the radio should be on and neutral; thus, the servo is at neutral position.
b.
With the servo at neutral, loosen the brake linkage collar and move it to a point where the brake levers still
have 2mm of space before brakes are engaged.
c.
With the servo at neutral, use a 1.5mm hex wrench to set the outer collar next to the plastic lever (servo
horn).
11
a. To set the carburetor idle (point where the carburetor lever will not close any more), turn the screw as
pictured (smaller needle on the side of the carburetor body). Initial idle setting should leave 1mm
carburetor gap. Clockwise turn will provide higher idle (larger carburetor opening), and counterclockwise
turn will provide lower idle (smaller carburetor opening).
b. To set the high speed needle, turn the screw as pictured. Initial high speed needle setting should be
2.5 turns (close the needle completely, then back out 2.5 turns). Clockwise turn will provide leaner
setting (lower fuel to air mixture), and counterclockwise turn will provide richer setting (higher fuel to
air mixture). Please refer to engine break-in / setting procedures to properly set the engine.
c. To set the low speed needle (larger needle on the side of carburetor body), the initial setting should
also be 2.5 turns.
d.
Remove the foam filter and make it moist evenly with a few drops of fuel. If the vehicle will be operated
in an area with fine dust, use caster oil instead of fuel. It is important that the foam is only moist to trap
dirt and allow air passage. With the foam too wet, limited air can pass through; therefore, limiting engine
performance. Finally, make sure the air cleaner boot is securely fastened with a zip-tie.
ADJUSTING THROTTLE / BRAKE LINKAGE
a
b c
abc
ADJUSTING CARBURETOR
5
d
12
a
b
c
a.Remove the cap from fuel bottle nozzle.
b. Squeeze the fuel bottle, insert into fuel, and draw fuel into the fuel bottle. The fuel used should be
methanol based model engine glow fuel (available at hobby shops) with 10% to 30% nitro content and
5% to 18% caster/synthetic oil content for lubrication.
c.Fill car's fuel tank with glow fuel.
13
FUELLING
PREPARING THE ENGINE FOR STARTING
cba
f
d e
a.To start an engine, first remove the glow plug with the included wrench.
b. Check the glow plug by plugging it into the glow plug igniter. The glow plug element should light up
brightly. If it lights up dimly, then the glow plug igniter is low (and it needs recharging). If it doesn't
light up, or the plug element looks distorted, then the glow plug is bad (replace with new one). After
checking, reinstall the glow plug.
The glow plug used for this engine can be: Thunder Tiger 9281, McCoy #9 / #59,
Novarossi C4S / C5S / C6S,OS #8 / #A3 / #A5, and Picco P6S / P7S.
c. With the radio off, manually turn the servo to open the carburetor (open throttle).
d. Plug the tuned pipe exhaust tip.
e. Keeping the exhaust tip plugged, pull on the engine's starter. Keep doing it until fuel reaches engine's
carburetor, then pull it 3 more times to prime the engine.
f. Manually return the servo back to neutral.
6
a. Turn on the radio (transmitter first, then receiver)
b. Clip the glow plug igniter onto engine's glow plug.
c. Pull on the engine starter,release, repeat until the engine starts. Throttlemaybe required to be opened momentarily,
step 9a (release back to neutral immediately after it starts).
Remove the glow plug igniter from engine after engine has started and warmed up. If the engine stops right after
the igniter is removed, the carburetor setting is too rich. Please refer to engine setting section.
If engine starter becomes hard to pull, the engine maybe flooded. To unflood an engine, remove the glow plug from
engine, flip the car upside down, and pull on the starter to release excess fuel. Then, reinstall the glow plug and
repeat the engine starting procedure.
ENGINE BREAK-IN
For a new engine (break-in setting), the high speed needle needs to be set as rich as possible. Turn the high speed
needle 1/4 turn counterclockwise from initial setting (2.5 turns from fully closed). Repeat step 15b. Keep doing this
until the engine stalls at full throttle, then turn the high speed needle 1/4 turn clockwise. Run the car in an open parking
lot with this rich engine setting for at least 5 tanks of fuel to complete the break-in process. It is normal for new engines
to stall many times during this time due to the rich setting. When it does, just restart the engine. After break-in, follow
the engine setting procedure to set the carburetor for normal operations.
ENGINE SETTING
Due to different fuel formula, operating elevation, humidity...etc. The engine may / may not operate properly at initial
setting. Please follow the following procedure to achieve proper carburetor setting. Do not perform this procedure until
the engine has been properly broken in.
a. Start the engine.
b. With a running engine, run the car back and foreth in a straight line (full throttle achieved during each passage) in an
open parking lot. Repeat, and note the sound of the exhaust. Do not hold the throttle open with car off the ground or
the engine connect rod may break.
c. If the exhaust does not reach a high pitch note, turn the high speed needle (long needle, extending from carburetor,
pointing up) 1/4 turn clockwise, and repeat step 15b.
If the exhaust reaches a high pitch note immediately, turn the high speed needle 1/4 turn counterclockwise, and repeat
step 15b.
d. Repeat step 15c until the engine reaches optimum setting (turning in the high speed needle will no longer have an
effect at full throttle and turning out the needle will cause the engine's full throttle rpm to drop a little).
For normal operations, turn the high speed needle 1/4 turn counterclockwise from the optimum high speed needle
setting.
e. To set the idle, turn the idle screw in (higher rpm) or out (lower rpm).
Basically, the idle needs to be set at the lowest possible point before the engine stalls.
f. To set the low speed needle (larger needle on the side of carburetor body), the engine needs to be broken-in and
high speed needle needs to be set first.
g. Repeating step 15b every 10 seconds (1 second of full throttle and 10 seconds of idle). If the engine rpm at idle
drops after a few seconds and stalls, then turn in the low speed needle (clockwise) 1/4 turn. If the engine rpm stays
the same or goes up at idle, then turn out the low speed needle (counterclockwise) 1/4 turn.
h. Keep repeating step 15g until the engine rpm drops (goes to idle rpm, then drops a few more rpm after a few seconds)
but does not stall at idle.
STARTING THE ENGINE
14
a b c
15
7
8
a
SHOCK AND REAR TOE-IN ADJUSTMENT
b
a. Use the included shock clips to adjust for spring pre-load. Pressing the entire car down, release,
and the car should return to ride height (indicated on set-up page). More pre-load clips will produce
higher ride height, and less clips will produce lower ride height. Amount of clips used for front and
rear shocks can be different, but clips should be the same for left and right.
b. Use the included plastic toe-in plates to adjust for rear toe-in. The toe-in angles are indicated on
each plates.
WARNING
Thank you for purchasing a Thunder Tiger Product. Please read all instructions thoroughly before operation.
1. This product is not a toy. It is a high performance model product. It is important to familiarize yourself with
the model, its manual, and its construction before assembly or operation.
2. Do not operate model products in rain, on public roads, near crowds, near airport, or near areas with restricted
radio operation.
3. Always keep fuel away from heat and open flame. Only operate in open, well-ventilated area. Store fuel in
cool, dry area. Keep the fuel bottle cap tightly closed. Clean up any leak or excess fuel before starting the
engine.
4. This product, its parts, and its construction tools can be harmful to your health. Always exercise extreme
caution when assembling and/or operating this product. Do not touch any part of model which rotates.
5. Check your radio frequency with the proper operating frequency of the area or country.Always check to see
if there are any modelers operating on the same frequency as your are. Also, check your radio for proper
operation before operating a mode.
6. Improper operations may cause personal and/or property damage. Thunder Tiger and its distributor have no
control over damage resulting from shipping, improper construction, or improper usage.
7. Thunder Tiger assumes and accepts no responsibility for personal and/or property damages resulting from
the use of improper building materials, equipment and operations. By the act of assembling or operating this
product, the user accepts all resulting liability. If the buyer is not prepared to accept this liability, then he/she
should return this kit in new, unassembled, and unused condition to the place of purchase.
16
9
FRONT
350 400 450
STANDARD
OIL
3000 MORE STEERING
5000 STANDARD
10000 LESS STEERING
OIL
CAMBER -2˚
More +, less traction
More -, more traction
TOE 2˚ Toe-in
More toe-in, more rear traction, less speed
Less toe-in, less rear traction, more speed
WHEELBASE 320mm
Longer,more stable through bumpy surface
RIDE HEIGHT 24mm (floor to chassis)
MAX HEIGHT 53mm (floor to chassis)
SET-UP
CAMBER -2˚
More +, more steering
More -, less steering
CASTER 18˚
More +, less steering
More -, more steering
TOE 0˚
Toe-in, corners wide under power
Toe-out, corners close under power
RIDE HEIGHT 24mm (floor to chassis)
MAX HEIGHT 45mm (floor to chassis)
STIFFER SUSPENSION,
LESS BUMPY TRACK.
STANDARD
CENTER
5000 STANDARD
10000~20000 QUICKACCELERATION
(TRACK SUFACE MUST HAVEGOOD TRACTION)
BRAKE BIAS 40%front / 60% rear
OIL
100STANDARD
OR USE BEARING GREASE &
REMOVE O-RINGS
OIL
250 300 350
STANDARD
OIL
REAR
STANDARD
STIFFER SUSPENSION,
LESS BUMPY TRACK.
SOFTER SUSPENSION,
MORE BUMPY TRACK.
STANDARD
STIFFER SUSPENSION,
LESS BUMPY TRACK.
STANDARD
FOR FLAT TRACKS
STANDARD
SLOWER
STEERING
QUICKER
STEERING
STANDARD
STANDARD
STIFFER SUSPENSION,
LESS BUMPY TRACK.
SOFTER SUSPENSION,
MORE BUMPY TRACK.
LESS REAR TRACTION
MORE FRONT STEERING
MORE REAR TRACTION
LESS FRONT STEERING
STANDARD
MORE REAR
TRACTION
LESS REAR
TRACTION
Description Problem Solution
Engine will not Out of fuel ................................................................. Fill fuel tank
start Contaminated fuel .................................................... Replace fuel
Glow plug igniter not charged ................................... Charge glow igniter
Glow plug bad .......................................................... Replace glow plug, see "Glow Plug Problems"
section below.
Fuel not getting to carburetor ................................... Open and close fuel tank lid twice.
Engine flooded ......................................................... See "Flooding" section below.
Engine overheating................................................... Allow engine to cool, richen fuel mixture,
see "Fuel Mixture" section below.
Carburetor incorrectly adjusted................................. Re-adjust carburetor, see "Fuel Mixture" or
"Factory Carburetor Settings" section below.
Exhaust blocked ....................................................... Check exhaust, remove blockage.
Air cleaner blocked ................................................... Check air cleaner, remove blockage.
Engine starts, Idle speed set to low................................................. Adjust idle speed screw, see "Fuel Mixture"
then stalls section below.
Air bubbles in fuel line............................................... Check for leaks in fuel line
Glow plug is fouled.................................................... Replace glow plug, see "Glow Plug Problems"
Section below.
Starter rope will Engine is flooded....................................................... See "Flooding" section below.
not pull Engine is seized........................................................ Examine engine for damage
TROUBLESHOOTING
If you have trouble starting or keeping your EB4-S2 PRO running,
here's a quick checklist of what to look for first.
Glow Plug Problems.
The glow plug in your engine must be replaced
periodically to maintain peak performance and easy
starting. Most starting problems or erratic performance
can be traced back to the glow plug. The easiest way
to check for a faulty glow plug is to simply install a new
one and see if the problem is
corrected. However,to test the
glow plug, remove the glow
plug form the cylinder
head with a 5/16" nut driver
(make sure there is no dirt
on top of the head which could
fall into the engine. Do not lose
the copper gasket which seals the glow plug.)
Connect the glow plug to the glow igniter.All of the coils
should glow bright white. Sometimes, the first few coils
will not glow, while the rest are bright orange. This
indicates a bad glow plug or low igniter battery. Try
recharging the igniter, or replacing the glow plug.
Flooding
Symptoms of a flooded engine include difficulty in starting,
muffled sounds coming from the exhaust, pull starter
won't operate, and excess fuel draining from the exhaust
outlet. Remove the glow plug with a 5/16" nut driver and
also remove the air cleaner. Turn the car upside down
and pull the starter a couple of times to drain the excess
fuel out of the engine and carburetor. Re-install the glow
plug and try starting again.
Fuel Mixture
The fuel mixture is controlled by three different
adjustments on the carburetor, and should come preset
from the factory (see photos below). Yourengine should
start and run slightly rich with these settings (rich is
good for break-in). Tuning Tip: Always make sure
you can see some exhaust smoke coming out of the
exhaust outlet during operation. This is a good sign
that enough fuel is getting to the engine.
Factory Carburetor Settings.
Low speed mixture
6
1/2
turns out
Clockwise=Leaner
Counterclockwise-Richer
Idle speed:
.020" (.5mm)
Adjust Idle Screw until
.5mm is obtained.
High speed mixture:
2
3/4
turns out
Clockwise = Leaner
Counterclockwise-Richer
Low Speed Screw
Low Speed Screw
Idle Screw
Idle Screw
0.020" (0.5mm)
0.020" (0.5mm)
Richer
Richer
Leaner
Leaner
Richer
(More Fuel)
Leaner
(Less Fuel)
Richer
(More Fuel)
Leaner
(Less Fuel)
10
No.6216-A1 Purple
No.6216-A2 Blue
No.6216-A3 Red
THUNDER TIGER
PRO-70BX(R)
ENGINE INCLUDED
TheThunder Tiger EK-4
Simply the biggest, baddest RC truck ever to roll off the production
line. The fire breathing EK-4 eats all other trucks for breakfast!
lunch and dinner!
With three times the output of the closest competition the EK4's oversized tyres and seven shock absorbers gives the PRO70 engine the power to effortlessly charge over ANY terrain. Total
domination!
1/8 off-road, sport, 4WD truck
90% assembled- requires radio unit & servos
Factory painted heavy duty Ford F-350body
PRO-70 hight troque engine
High performance manifold & tuned pipe
7 large composite shocks
Double disc brake system
Durable front/rear differentials
Adjustable rear toe-in plates,
front/rear camber, front caster
and wheelbase!
And many more exciting
features!
No. 7, 6TH Road Industry Park Taichung 407, Taiwan http://www.thundertiger.com
THUNDER TIGER CORP.
JD0421
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