12867-1
Instruction Manual
En
En Jp
Savage X 4.6 RTR
To prevent any serious personal injury and/or damage to property, please be responsible when operating all remote controlled models. Extra attention is
called for when operating any glow fuel powered model. These models can exceed speeds of 30 m.p.h. and use highly poisonous and flammable fuels.
Before Running
Please read manual (with parent, guardian or a responsible adult if necessary).
While Operating
Please do not run on a public street, this could cause serious accidents, personal injuries and/or property damage.
Please do not run near pedestrians or small children.
Please do not run in small or confined areas.
Before Operating
Make sure that all screws and nuts are properly tightened.
Always use fresh batteries for your transmitter and receiver to avoid losing control of the model.
Make sure no one else is using the same radio frequency as you are using.
Please confirm the neutral throttle position.
After Running
Shut off engine first, then turn off receiver switch and turn off transmitter last.
After running Savage X 4.6 RTR, it is necessary to perform routine maintenance. Failure to do this can result in increased wear and damage to the engine and chassis.
Heat, Fire, and Fuel Safety
Never use gasoline in a glow engine. Use glow fuel specifically designed for model car engines.
Do not run near open flames or smoke while running your model or while handling fuel.
Always store fuel in a well ventilated place, away from heating devices, open flames, direct sunlight, or batteries. Keep glow fuel away from children.
Glow fuel is flammable and poisonous. Glow fuel powered model engines emit poisonous vapors and gasses. These vapors irritate eyes and can be highly dangerous to your health.
Be aware that some parts will be hot after operation. Do not touch the exhaust or the engine until they have cooled.
Thank you for selecting the HPI Racing Savage X 4.6 RTR! This kit is designed to be fun to drive and uses top quality parts for
durability and performance. The instruction manual you are reading was designed to be easy to follow yet thorough in its expla-
nations. HPI Racing wants you to enjoy driving your new Savage X 4.6RTR. If you come across any problems or need some
help getting through a step, give us a call and we will do our very best to help you. You can also contact us on the internet at
www.hpiracing.com.
The caution or attention symbols will warn you about steps that can be very dangerous. Please read and understand the instructions carefully
before proceeding.
Caution
Failure to follow these instructions can damage
your kit, and cause serious bodily injury or death.
Attention
Failure to follow these instructions can cause
injury to yourself or others. You might also cause
property damage or damage your kit.
Caution
Thank you
2
3
Contents
Page Contents Section
Overview
4
1
Start Up Guide
2
6
36
Exploded View
5
40
Parts List
6
Preparation for Running
6
2 - 1
HPI Roto Start System Preparation
7
2 - 2
Glow Plug Igniter Preparation
8
2 - 3
Transmitter Preparation
9
2 - 4
How To Control R/C Models
10
2 - 5
Linkage Setup
11
2 - 6
Starting Engine and Break In
12
2 - 7
Engine Tuning After Break In
14
2 - 8
Optional Tuning
15
2 - 9
Carburetor Factory Setting
16
2 - 10
Glow Plug
16
2 - 11
Troubleshooting
17
2 - 12
Option Guide
4
35
Engine Guard
35
4 - 1
18
Maintenance
3
Maintenance Chart
18
3 - 1
Chassis
19
3 - 2
Wheel
19
3 - 3
Air Filter
20
3 - 4
Radio
21
3 - 5
Spur Gear
22
3 - 6
Engine and Fuel Tank
24
3 - 8
Engine and Tuned Pipe
25
3 - 9
Gear Box and Differential
27
3 - 11
Shock
29
3 - 13
2 Speed Setup
23
3 - 7
Clutch
26
3 - 10
Front and Rear Differential
28
3 - 12
Throttle Linkage
31
3 - 15
HPI Roto Start System
34
3 - 17
Servo
30
3 - 14
Engine
32
3 - 16
Chassis
36 5 - 1
Transmission
37 5 - 2
Gear Box
38 5 - 3
Engine
39 5 - 4
Parts Reference
40 6 - 1
Option Parts List
46 6 - 3
Parts List
44 6 - 2
4
Screwdriver
2029 (US,JP)
Battery Pack 7.2 Volt
HB70452
Charger for Battery Pack 7.2 Volt
AA Alkaline Batteries
We recommend that you use fuel
containing 20-25% nitro glow fuel.
Transmitter
Roto Start
Z150
Antenna Pipe
Radio Box Parts Battery Case
Inner Cone
6154
Nylon Strap
Clutch Bell Body Mount
Air Filter Element Engine Guard
R/C Car
Allen Wrench
70332
Glow Plug Wrench
8
mm
Z904 2.0mm
Z903 2.5mm
Z905 3.0mm
9062 (US,EU)
9063 (JP)
Nitro Car Cleaner
Thread Lock
30035 (JP)
Instant Cement
Z190
Air Filter Oil
39014 (JP)
Oil Spray
Z164
Grease
Components
Included Tools Parts Bag
Equipment Needed
Necessary for maintenance
Z960
Turnbuckle Wrench 4mm / 5.5mm
74151
HPI Racing Temp Gun
74318/74348 (US)
38704/38705 (JP)
Glow Fuel
20% - 25%
2
mm
2.5
mm
1.5
mm
3
mm
x12
1
Overview
Rag
Brush
74104 (EU 3Pin)
74105 (US)
74106 (EU 2Pin)
74107 (JP)
Glow Plug Igniter
Screwdriver
9067
Fuel Bottle
4 - 5mm
Z901 1.5mm
This charger is
powered by a
standard 12V
lighter socket.
This charger
designed for
Ni-MH battery.
Needle Nosed Pliers
Snap Ring Pliers
5.5
mm
7
mm
Z950
Cross Wrench
See Section 3-9
3-9
See Section 3-10
3-10
See Section 4-1
4-1
See Section 5-3
5-3
5
Chassis Details
Engine Details
Caution
Receiver Antenna
Radio Box
Fuel Tank
Shock
Drive Shaft
Wheel Hub
Front Gear Box
Engine Roll Bar
Brake
Wheel Nut
Center Gear Box
Glow Plug
Pressure Tube
Air Filter
Fuel Tank Cap
Fuel Tube
Fuel Tank
Carburetor
Clutch
Exhaust Pipe
Rear Gear Box
Do not run on public streets or highways.
This could cause serious accidents,
personal injuries, and/or property damage.
Make sure everyone is using a different
frequency (See section 3-5) when driving
together in the same area.
Receiver Switch
OFF
ON
6
Start Up Guide
Connect and install receiver batteries, then uncoil antenna wire, and pull antenna wire through hole in battery
cover. Secure the battery cover and install antenna pipe.
Radio Box
Battery Case
Preparation for Running
Body Removal
Receiver Battery Installation
Receiver Battery
6123
7768
6123
Attention
2-1
2
Please read the instructions before running.
Optional Battery
LOCK!
2012
Hump Battery Pack For Receiver (6V 1200mAh/Ni-MH)
6123
Body Pin
For extended running, we recommend #2012 Hump Battery Pack.
Z150
AA Alkaline Batteries
AA Alkaline Batteries
Only use alkaline batteries in the receiver.
4x
AA Alkaline Batteries
Note Direction
Do not cut or shorten
antenna wire.
4x
1 2
85237
2
85236
2
85027
Roto Start Details
Battery Installation
Roto Start Battery Charging
Charger for Battery Pack 7.2 Volt
(Not included)
Caution
7
Roto Start makes engine starting easier. You must charge the battery before use.
After charging the battery, insert into Roto Start and connect the battery.
Then connect starter shaft.
Disconnect the battery when Roto Start is not being used.
Only use charger designed for 7.2Volt battery pack.
HPI Roto Start System Preparation
2-2
Roto Start Unit
Roto Start Unit
Circuit Breaker
Battery Lid
Switch
Switch Cover
Starter Shaft
Starter Shaft
Battery Pack 7.2 Volt
(Not included)
Battery Pack 7.2 Volt
(Not included)
Do not use Nickel Cadmium battery charger for Nickel Metal
Hydride batteries. If you do not use the special charger for Nickel
Metal Hydride batteries, The batteries will be damaged.
Note Direction.
If engine locks, the circuit breaker will stop the Roto
Start. Remove Roto Start and check engine for
flooding or damage. If there is no problem with the
engine, reset the circuit breaker by pushing the
button and try to start the engine again.
ON OFF
How to Use Roto Start
This charger is powered by a standard 12V lighter socket. This charger is designed for Ni-MH battery.
1
2
8
Insert starter shaft into engine back plate. Press down the switch to crank the engine. If engine locks,
the circuit breaker will stop the Roto Start. Remove Roto Start and check engine for flooding or
damage. If there is no problem with the engine, reset the circuit breaker by pushing the button and try
to start the engine again.
Do not use the Roto Start
continuously for more than 5
seconds at a time. Using the
Roto Start for longer than 5
seconds will cause damage.
Back Plate Unit
Starter Shaft
Do not use Nickel Cadmium battery charger for Nickel Metal Hydride batteries.
If you do not use the special charger for Nickel Metal Hydride batteries, the
batteries will be damaged.
Switch
Switch Cover
Remove glow plug igniter as soon as the engine is running.
Leaving it connected will drain the battery.
Glow plug igniter is necessary for starting nitro engine.
These items are not included with your kit. They must be
purchased separately. Follow the instructions included with
your glow plug igniter and charger. If the glow plug igniter is not
fully charged, the engine will not start.
Glow Plug Igniter Preparation
2-3
You must charge before use.
Glow Plug Igniter
Compatible Charger
74104 (EU 3Pin)
74105 (US)
74106 (EU 2Pin)
74107 (JP)
Glow Plug Igniter
Optional Battery Charger
HB70452
GT Escape Charger
12V DC power source necessary.
Two batteries can be charged at
the same time.
Caution
Circuit Breaker
ON OFF
12V
9
AA Alkaline Batteries
8x
Do not mix batteries of
different ages or types.
Antenna
Extend the antenna to the maximum
length for best performance.
Open battery cover at the bottom of transmitter.
Install batteries. Follow the direction of batteries
designated in the inside of battery box.
The Savage X includes a two-channel
TF-3 Radio. When installing a reverse
module, you must use option part
#87039, which includes a mixer that
allows the reverse module to function
with the third servo.
Steering Wheel
To be used for steering operation.
Throttle trigger
To be used for throttle operation.
AM 27MHzTransmitter Crystal (TX)
The crystal can be replaced to change frequencies.
Note: You must also change receiver crystals!
Do not use FM crystals
Steering Trim
To be used for trimming the steering
operation.
Throttle Trim
To be used for trimming the throttle
operation.
Steering Dual Rate
Battery Cover
To be used to adjust steering servo
rate and range.
Servo Factory Settings
Battery Level Indicator
Power Switch
Reverse Switch
Good Batteries
Low Batteries
AM Transmitter crystal (TX)
AM Receiver crystal (RX)
Forward
Brake
Stop (Neutral)
Transmitter Preparation (HPI TF-3 AM 2ch)
2-4
Attention
Transmitter Battery Installation
ON
OFF
Straight (Neutral)
Right turn
Left turn
80552
HPI TF-3 Transmitter (2ch/AM27MHz)
ON
10
Extend the antenna
Forward
Forward
Brake
Brake
Stop (Neutral)
Stop (Neutral)
Straight (Neutral)
Straight (Neutral)
Right turn
Left turn
How To Control R/C Models
1
2
3
Retract the antenna
3
2
1
Make sure no one else is using the same radio frequency as you are using. Check the radio
system and range before every driving session. To properly check the range, have a friend hold
the R/C car with the engine off and walk to the farthest distance that you plan to operate your
R/C car. Operate the controls to make sure the model responds correctly. Do not operate the
model if there is any problem with the radio system. If you switch on the R/C car first before the
transmitter, you may lose control of the R/C car.
If you switch off the transmitter first before the R/C car, you may lose control of the R/C car.
Turning the transmitter wheel left and right will make the
front tires of the car do the same. Turning the wheel a
small amount will make the model perform a wide turn.
Turning the wheel a large amount will make the model
perform a sharp turn.
Pull the throttle to drive forward and press it away for
brakes. The more you pull the throttle, the faster the car
will move forward.
OFF
OFF
ON
ON
Right turn
Left turn
Activating R/C Unit
Turning R/C Unit Off
Turn on transmitter first, then turn on receiver.
Turn off receiver first, then turn off transmitter.
Throttle Trigger
Steering Wheel
2-5
Check Max. Range
Transmitter Operation
Caution
Approximately
1mm (0.04")
Approximately
1mm (0.04")
Adjustment
see section 2-9
11
Linkage Setup
Trim adjusts neutral position of servo.
Make adjustments with the engine off.
Remove air filter to adjust throttle linkage. After setup is complete, reinstall the air filter. See Section 3-4.
3-4
Turn throttle trim little by little and adjust rods as shown.
Pull full throttle.
Make sure the carburetor is open.
Push trigger to the full brake position.
Try pushing the car to make sure the
brake works.
Brake Adjustment Dial
Carburetor
Carburetor
Carburetor
Brake Adjustment Dial
More Braking
Less Braking
Turn steering trim to set tires in
completely centered position.
If throttle linkage is not set up correctly the car may lose control after
the engine is started.
Important
No brake drag at neutral.
Make sure there is no brake drag at neutral.
Setting Full Throttle
Setting Full Brake
Optional Throttle Linkage Setup
Steering Trim Setup
Throttle Linkage Setup
Important
Important
2-6
Open
Steering trim
Throttle trim
ON
12
Keep the wheels off the ground.
These instructions will explain the running procedure, how to prepare the car, turn on radio equipment, start the engine, break in the engine,
shut off the engine, and shut off the radio equipment. When starting the engine for the first time, you must perform the break in procedure.
Make sure no one is using the same frequency. Turn on transmitter first and receiver second. If you turn on the receiver first, it can cause you
to lose control of the car.
Step 1
Step 2
Step 3
Step 4
Preparation for Engine Start
Fill Fuel Tank
Turn On Radio System
Priming Engine
Flooded Engine
Fill the tank completely with fuel. Use only 20 to 25%
nitro content fuel. Use high quality model car fuel only.
Using non-car fuels could void your warranty.
Make sure no one is using the same frequency. Turn on transmitter first, then turn
on receiver. Check the throttle and steering functions and check the radio range
before starting engine. If you switch on the R/C car first before the transmitter,
you may lose control of the R/C car.
To prime the engine, use your finger to cover the exhaust tip. crank engine with Roto
Start until fuel reaches the carburetor and no bubbles are seen. Using Roto Start too
long will cause the engine to be flooded.
Starting Engine and Break In
Remove the glow plug and turn the engine
using the Roto Starter to remove excess
fuel. Reinstall the glow plug .
If there is too much fuel in the cylinder, the
engine will not start.
Follow the step below to remove excess
fuel from the cylinder.
Extend the antenna
1
2
ON
NO! OK!
74318/74348 (US)
38704/38705 (JP)
Glow Fuel
2-7
70332
3
ON
ON
Rag
Fuel Tube
Switch
Do not use the Roto Start
continuously for more than 5
seconds at a time. Using the Roto
Start for longer than 5 seconds will
cause damage.
We recommend that you use fuel
containing 20-25% nitro glow fuel.
20% - 25%
Back Plate Unit
13
Break In
Engine Shut Off
Use a Rag Pinch the Fuel Line
Turning R/C Unit Off
Turn off receiver first, then turn off transmitter.
Use a rag to cover the exhaust tip. This
will stop the engine. Be careful! The
exhaust is extremely hot so be sure to
use a thick rag.
In extreme cases or emergencies
you can pinch the fuel line to stop
the flow of fuel to the carb.
HPI engines will feel tight at the top of their stroke when they are new or when they have not reached
their normal operating temperatures. The piston and cylinder sleeves are designed to achieve proper
running tolerances when they are properly broken in and are operating at the correct temperature. New
engines need a break in period of about 3 to 4 tanks of fuel before they can be run at full throttle, if not the
engine could be damaged.
Break in should be performed on a flat level surface.
Glow Plug and Starter
Attach the glow igniter to the glow plug. Start the engine by
cranking with the Roto Start. Remove the glow igniter as soon
as the engine is running.
If the glow plug igniter is left connected while the engine is
running, it will drain the battery and damage the glow plug.
The engine must never be run without the air
filter in place.
Attention
New engines need a break in period of about 3 to 4 tanks of fuel before
they can be run at full throttle, if not the engine could be damaged.
If the air filter falls off, you must stop the engine immediately.
Attention
20’ (6M)
Step 5
Step 6
Step 7
Step 8
1
After the engine starts, let it run with the wheels off the ground for one tank of fuel.
After the first tank, drive the car in a circle at half throttle for two tanks of fuel.
2
If you switch off the transmitter first before the R/C car, you may lose control of the R/C car.
2
OFF
Retract the antenna
3
Rag
ON
Switch
Fuel Tube
1
OFF
Do not use the Roto Start continuously for more
than 5 seconds at a time. Using the Roto Start for
longer than 5 seconds will cause damage.
Glow Plug
Glow Plug Igniter
2-8
Step 1
Step X
Step 3
Step 2
Step 4
High Speed Needle
2 1/2 turn MAX clockwise
from flush.
Use screwdriver
to adjust high
speed needle.
Low Speed Needle
Idle Adjustment Screw
Roto Start
Exhaust Outlet
Crankcase
Glow Plug
Heat Sink
Carburetor
The carburetor is set up from the factory for break in (2-9). After break
in the carburetor must be tuned for high performance running.
2-9
Engine Tuning After Break in
Read this section carefully: Failure to follow these tuning steps could
result in damage to your engine, and void your warranty!
Important
Engine Features Carburetor Features
Tuning for Optimum Performance
Fuel Mixture Tuning Tip
Caution
2 1/2 turn
MAX
Step 1
Step X
Step X
Step 4
Step 1 Step 4
Turn the high speed needle clockwise in 1/8 turn
increments
to lean out the fuel mixture for
increased top speed and throttle performance.
Drive the car to notice changes in speed and
throttle response.
Continue Tuning:
Continue leaning the carb in Clockwise 1/8 turn
increments. (Maximum of 2 1/2 turns from flush.)
STOP Tuning:
Stop tuning and go to if your engine shows
any of the following signs. (Engine is running too lean.)
At full throttle, there is no smoke
from the exhaust.
The engine hesitates or bogs.
Reduced top speed and loss of power.
Overheating
Temperatures above 250°F (120°C)
at the glow plug.
If your engine is running lean, turn the needle
counter clockwise 1/4 turn to richen the fuel
mixture and repeat.
14
High
Speed
Needle
Safe Range
250°F
(
120°C
)
230°F
(
110°C
)
210°F
(
99°C
)
190°F
(
90°C
)
Danger
Break in
Attention
74151
HPI Racing
Temp Gun
More Fuel = Rich
Less Fuel = Lean
Fuel Mixture Tuning Engine Temperature
More Fuel = Rich
Rich Fuel Mixture
A slightly rich fuel mixture delivers a cooler running
temperature and more lubrication but with slightly
less power and longer engine life.
Less Fuel = Lean
Lean Fuel Mixture
Provides strong and efficient combustion and
power, but if you lean out too much the result is less
lubrication, more engine heat and shorter engine
life.
Adjust carburetor to keep the
operating temperature below
250°F.
Engine temperature can tell you if the engine is
running lean or rich.
Danger
Screwdriver
4 - 5mm
15
The idle speed is set after the high-speed needle is adjusted and the
engine is up to operating temperature. To properly set the Idle
Adjustment Screw, turn on your radio system and set the throttle trim on
the transmitter so that the throttle is in its neutral position. This will
ensure that the throttle slide is fully closed and resting against the idle
adjustment screw. Turn the idle adjustment screw counter clockwise to
reduce the idle speed, or clockwise to increase it. The idle speed should
be set high enough to keep the engine running smoothly but not engage
the clutch and turn the wheels. Too high of an idle speed will
prematurely wear out the clutch shoes and brake disk.
Idle should be set so that at neutral throttle position the engine is running without engaging the clutch and moving the car forward.
Improper Idle Speed Setting:
Clutch engaged and wheels turning.
Proper Idle Speed Setting:
Engine runs smoothly without wheels turning.
If idle is unstable, adjust the low speed
needle to get a stable idle. Afterwards,
you need to readjust the idle adjustment
screw.
We recommend that you do not touch the Low Speed Needle.
If adjustment is needed, the low-speed mixture is set after the high-speed needle
is adjusted and the engine is up to operating temperature. Set the needle flush (Factory Setting) with the carburetor body, this setting is
ideal for breaking in and starting your motor. For increased performance turn the needle in 1/8 turn increments; this will improve bottom
end throttle response. To test your setting, place the car on the ground and let the engine idle for 30 seconds then accelerate to 3/4
throttle. If there is a lot of white smoke and the car accelerates slowly, the mixture is too rich. If the engine accelerates quickly and then
sputters, the mixture is too lean. When the low-speed needle is set correctly the engine's throttle response should be smooth and quick.
CAUTION: Never turn in more than 2 turns from flush this will cause the engine to run too lean and may damage your engine!
If the Low
Speed Needle is set too lean you will experience the following:
Flame out at part or 3/4 throttle, overheating (temperatures above 280 F at
the glow plug). If your engine is running too lean, reset the Low Speed Needle to its factory setting (Flush) and start the tuning process
again.
Idle Adjustment Screw
Low Speed Needle Adjustment
1mm (0.04")
Low Speed Needle
More Fuel = Rich
Less Fuel = Lean
Flush (Factory Setting)
Following the tuning steps, tune the engine until its maximum performance is reached. While a lean motor will have higher performance, it can
lead to premature engine wear or failure. Use the following information to tune your engine to your driving conditions. Remember a slightly rich
setting is a safer setting.
Engine temperature can tell you if the engine is running lean or rich. If you check the engine temperature, you can understand how to tune your
carburetor. Adjust carburetor to keep the operating temperature below 250°F. If the engine temperature goes over 250°F, the engine will be
damaged.
If you turn the needle past the closed point, it will be damaged. Do not tighten past closed.
If you lose the needle setting, you can reset the factory setting (See Section 2-10) and re-tune.
2-10
Fuel Mixture Tuning Tips
Idle Adjustment Screw
RPM High
RPM Low
Optional Tuning
No!
Ok!
2-9
16
Good Plug
Element glows
when tested.
Filament
Hot!
Glow Plug
Pliers
Glow Plug Igniter
Bad Plug
Element may be
damaged or broken if it
doesn’t light up
completely.
Bad Plug
Element is broken or
doesn’t light up at all.
Checking glow plug
How Glow Plugs Work
Proper Glow Plug Selection
Flush
High Speed Needle, Idle Adjustment Screw and Low Speed Needle are
designed to be set flush with the carburetor body. This makes it easy to
reset the carburetor to the Factory Break In Setting if needed.
Unlike full sized car engines that use spark plugs and a distributor to fire the cylinders in the combustion cycle, glow engines rely
on glow plugs. In a Nitro engine, ignition is initiated by the application of a glow igniter. When the igniter is disconnected, the heat
inside the combustion chamber keeps the glow plug filament glowing, firing the next cycle, thereby keeping the engine running.
Ignition timing in a glow engine is automatic. At higher RPM’s the plug becomes hotter, firing the fuel/air mixture earlier. At lower
RPM’s the plug becomes cooler, firing the fuel/air mixture later. Since the glow plug performs so many important functions,
proper plug selection and maintenance are crucial to a properly running engine.
Proper glow plug selection depends on several factors: Fuel
type, nitro methane content, weather, and altitude can drastically
affect performance. Finding the best combination of fuel and
plug temperature for your driving condition is the key to getting
the maximum performance out of your Nitro Star Engine.
Extending the Life of your Glow Plug
To maximize and extend the life of your glow plug follow these simple tips;
Remove the glow igniter when using more than 1/2 throttle or if the engine does not start after a few seconds.
Do not run the engine lean, lean conditions will overheat the plug causing the element to be damaged or fail.
Use the best Fuel/Plug combination for your driving conditions.
Use a fuel that has a lower nitro content.
When to Replace the Glow Plug
Fuel and temperature will have an effect on the performance,
reliability, and life span of the glow plug and therefore it
should be considered an expendable engine component.
Aside from burnout or plug failure, there are several signs that
can indicate the plug should be replaced.
Plug filament/plug body is discolored or the surface is rough.
Plug filament is distorted or bent.
Engine cuts out when idling.
Engine becomes difficult to start.
High Speed Needle
Flush with Groove
Low Speed Needle
Idle Adjustment Screw
When needle is over tightened
, the
needle is damaged.
Glow Plug
Carburetor Factory Setting (Break In Setting)
Attention
2-11
2-10
Outdoor Temp
Cold
Hot
Glow Plug Glow Plug Characteristics
Hot plug will be easy to start and
stable for tuning. But will fail
sooner at high engine temperature.
Cold plug will have better mid,
high RPM power and will last
longer at high temperature.
Glow Plug Medium R3
Glow Plug Medium Cold R4
Glow Plug Cold R5
17
Engine Does Not Start.
Out of fuel.
Fill the tank with fuel and prime engine.
Engine Starts Then Stalls.
Out of fuel.
Fill the tank with fuel and prime engine.
Engine Running, But Car Doesn’t Move.
See section 2-10 on carburetor factory setting then see section
2-8 on engine tuning after break in.
2-10 2-8
Erratic Control.
Weak batteries in transmitter and receiver. Install fresh batteries.
Improper antenna on transmitter or model. Fully extend antenna.
Do you have a clutch problem? See section 3-10 on clutch maintenance.
3-10
Are the brakes stuck?
See section 2-6. Make sure there is no brake drag at neutral.
Roto Start working properly? Make sure Roto Start starting shaft is turning.
Glow plug igniter not charged. Charge glow igniter battery.
Glow plug is bad. Replace glow plug.
Engine flooded. Discharge fuel.
Air filter is blocked. Check air filter, clean or replace if necessary.
Air filter is blocked.
Check air filter, clean or replace if necessary.
Engine is overheated,
Allow engine to cool and then restart.
Idle speed is set too low.
Adjust the idle speed.
Do you have a drivetrain problem?
Check drivetrain for damage.
Throttle isn’t adjusted properly.
Throttle servo is improperly set up.
Set servo to neutral and reset linkage according to radio and
model manufacturer’s specifications.
Throttle servo is improperly set up.
If R/C car does not move or you have no control, see below.
Troubleshooting
2-12
Section Problem Cause Solution
2-7
2-2
3-17
2-3
2-11
2-7
3-4
2-10
See section 2-10 on carburetor factory setting then see section
2-8 on engine tuning after break in.
2-10 2-8
Set servo to neutral and reset linkage according to radio and
model manufacturer’s specifications.
Throttle isn’t adjusted properly.
2-10
2-6
2-6
2-7
2-8
2-9
3-6
3-11
3-7
3-10
3-12
3-6
3-11
3-7
3-10
3-12
Do you have a drivetrain problem?
Check drivetrain for damage.
3-10
Gear mesh is incorrect. See section 3-6 on center gear box maintenance.
3-6
3-6
Do you have a clutch problem? See section 3-10 on clutch maintenance.
3-10
3-10
2-6
Receiver battery capacity is low.
Exchange receiver battery.
3-5
3-5
3-5
Brake does not work. See section 2-6 on linkage setup.
2-6
2-6
3-4
18
9062 (US,EU)
9063 (JP)
Nitro Car Cleaner
Thread Lock
Z190
Air Filter Oil
Needle Nosed Pliers
Necessary for Maintenance
3
Maintenance
After running you should clean the chassis and perform routine maintenance to keep the car in good running order.
Maintenance Chart
3-1
5.5
mm
7
mm
Z950
Cross Wrench
87546
Glow Plug Wrench
8
mm
Maintenance Item
Reference Section
Chassis Maintenance
Clean the chassis after every run.
page 19
3-2
Wheel Maintenance
Clean the wheels after every run.
page 19
3-3
Air Filter Maintenance
Clean the air filter after every run.
page 20
3-4
Radio Maintenance
Check the battery before every run.
page 21
3-5
Spur Gear Maintenance
Maintain Spur Gear before every run.
page 22
3-6
2 Speed Setup
Maintain 2 Speed before every run.
page 23
3-7
Engine and Fuel Tank Maintenance Maintain Engine after each day’s running.
page 24
3-8
Engine and Tuned Pipe Maintenance Maintain Engine after each day’s running.
page 25
3-9
Clutch Maintenance
Maintain Clutch after each day’s running.
page 26
3-10
Gear Box and Differential Maintenance
Maintain Gear Box after each day’s running.
page 27
3-11
Front and Rear Differential Maintenance
Maintain Differential after each day’s running.
page 28
3-12
Shock Maintenance
Check the Shocks before every run.
page 29
3-13
Servo Maintenance
Check the Linkage before every run.
page 30
3-14
Throttle Linkage Assembly
Check the Linkage before every run.
page 31
3-15
Engine Maintenance
Maintain Engine after each day’s running.
page 32
3-16
HPI Roto Start System
Check the system before every run.
page 34
3-17
Every 1 Tank Every 5 Tank Every 10 Tank
For maintenance schedule, refer to right side of the chart. After running, clean the chassis and check all moving parts for damage. If any
parts are broken or damaged, repair or replace them before the next run.
Regular maintenance is necessary to prevent damage to the car and maintain its performance.
Rag
Brush
Screwdriver
30035 (JP)
Instant Cement
Z164
Grease
39014 (JP)
Oil Spray
Screwdriver
Z960
Turnbuckle Wrench 4mm / 5.5mm
Allen Wrench
Z904 2.0mm
Z903 2.5mm
Z905 3.0mm
2
mm
2.5
mm
1.5
mm
3
mm
Z901 1.5mm
Snap Ring Pliers
1
5
10
Screwdriver
19
Chassis Maintenance
Make sure the tire is secure on the wheel. Re-glue if necessary.
Savage X standard hex hub is 17mm hex
hub. 14mm hex hub is also included for
use with optional wheels.
Use 17mm glow plug wrench to remove and install wheels.
Wheel Removal and
Installation
Re-Glue Wheel
Wheel Hub Selection
3-2
Wheel Maintenance
3-3
After running, clean the car and lubricate these points.
Replace damaged parts, check that all the screws are tight.
Oil Spray
Rag
Brush
87546
Glow Plug Wrench
86804
Hex Wheel Hub 17mm
Z260
PIN 2.5x12mm
Z680
Flanged Lock Nut M5x8mm
8
mm
8
mm
Use small amount to secure tire.
30035 (JP)
Instant Cement
Z680
Flanged Lock Nut M5x8mm (Black)
Z682
Flanged Lock Nut M5 (Black)
Wheel Cross Section
Std.
86804
Hex Wheel Hub 17mm
86066
Hex Wheel Hub 14mm
Option
3
Attention
20
Air Filter Maintenance
Dirt is the biggest enemy of a nitro engine and proper air filter maintenance is one of most important factors that
will affect your engines longevity. We recommend cleaning the element after every run. It is always a good habit
to check the element after every run to make sure it is properly seated in the filter body and that the body is fully
seated on the carburetor. Never run the engine without the air filter.
Remove and clean the air filter with nitro fuel when dirty. Spray fuel
through the clean side to ensure proper dirt removal. Squeeze the filter
to remove excess fuel. To re-coat the air filter with oil, place the
element in a plastic bag with several drops of air filter oil. Using your
fingers, work the oil into the element making sure it is evenly distrib-
uted.
After properly cleaning the filter element make sure it is reinstalled correctly. Make sure there are no gaps
between the element and body. Make sure the filter is fully seated on the carburetor and secure it with a tie strap.
Never run the engine without the air filter.
3-4
Proper Air Filter Maintenance
Cleaning the Filter Element
Reinstalling the Filter Element
6145
6154
Z190
Air Filter Oil
6154
Nylon Strap
2.5
mm
If the air filter falls off, you must stop the engine immediately.
Attention
1 2
Make sure the air filter is
fully seated on the carbure-
tor and secure it with a
nylon tie strap (6154).
Make sure the air filter is
fully seated on the carbure-
tor and secure it with a
nylon tie strap (6154).
Allen Wrench
Z903 2.5mm
2.5
mm
87199
a
Z224
Z543
87204
a
87204
b
87199
b
87199
c
87199
d
Cap Head Screw M3x10mm
Z543
Washer M3x8mm
Z224
Use one capful of air filter oil.
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