FX G501 User manual


 
Your FX Engine is a high-precision, high-performance model engine intended for
use in model cars. All of the nest engineering and craftsmanship has gone into
the concept, design, creation, and nishing of your very own FX Engine.
This engine and all of its parts were designed and manufactured by FX in-house
in Slovakia, Europe from all the nest European materials and using the most
advanced Swiss and German technologies. Even the crankcase was die cast in
house using our own fully robotic die casting technology. All the products are
individually measured and inspected and all of the important dimensions of every
part are recorded so there is a full record of every single part being manufactured
and assembled. Your engine birth certicate shows all the important serial numbers
and measurements so that, at anytime, all details of the production including the
batch of material, machine programs, responsible craft persons and production
dates can be traced back to its roots.
Enjoy your royal FX Engine.
󱇲 It is extremely important - before attempting to operate your new FX engine
– to read this Instruction Manual, and strictly adhere to the advice contained
therein.
󱇲 This engine is not a toy but a highly efcient internal-combustion engine with
power which is capable of harming you or others.
󱇲 This engine is intended for persons aged 16 years and older with previous
experience building and operating RC model racing cars and with previous
experience operating combustion nitro engines.
󱇲 This product is not intended for use by beginners, inexperienced customers, or
by children without direct supervision of a responsible, knowledgeable adult.
󱇲 Before installing and operating your engine, YOU MUST read through all of the
operating instructions and Instruction Manual and fully understand them to get
the maximum enjoyment and prevent unnecessary damage.
󱇲 Keep this Instruction Manual in a safe, easily-accessible location so you can
quickly & easily refer to it whenever necessary.
󱇲 Content of the box may differ from pictures shown in any promotional materials
such as catalogs, leaets, internet web site, instruction manual, etc.
󱇲 Use only genuine and original authentic FX parts for maximum performance.
Using any third-party parts on this engine may negatively inuence the
performance and reliability of the engine and moreover using any third-party
parts on this engine will void the warranty.
󱇲
Use only genuine FX glow plugs to ensure highest performance and long life time.
󱇲 In line with our policy of continuous product development, the exact
specications of the product may vary without prior notice.
󱇲 FX reserves all rights to change any specication without prior notice. All rights
reserved.
2. Before You Start
3. Limitations of Liability
3. Safety Precautions
4. Warnings
6. Very Important Warnings
7. Warranty
8. Included
8. Equipment Required
10. Basic Information
13. Engine Parts
23. Installation
29. Break-in Procedure
30. Break-in Procedure with Break-in Bench
36. Break-in Procedure in the Car
38. Maintenance
42. Replacing Parts
43. Bearing Change
46. Troubleshooting



󱇲 When using and/or operating this engine always wear protective glasses,
gloves, ear protection and protective shield.
󱇲 Take appropriate safety precautions prior to operating this product. You are
responsible for this engine installation and safe operation!
󱇲 Please read the Instruction Manual before building and operating this model and
follow all safety precautions.
󱇲 Improper operation may cause personal and/or property damage.

󱇲 FX has no control over damage resulting from shipping, improper installation, or
improper usage.
󱇲 FX assumes and accepts no responsibility for personal and/or property
damages resulting from the use of improper building materials, equipment and
operations.
󱇲 By purchasing any item produced by FX, the buyer expressly warrants that
he/she is in compliance with all applicable federal, state and local laws and
regulation regarding the purchase, ownership and use of the product.
󱇲 The buyer expressly agrees to indemnify and hold harmless FX for all claims
resulting directly or indirectly from the purchase, ownership or use of the
product.
󱇲 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 product in new, uninstalled, and unused condition to the place of
purchase.
󱇲 FX makes no other warranties expressed or implied.
󱇲 FX shall not be liable for any loss, injury or damages, whether direct, indirect,
special, incidental, or consequential, arising from the use, misuse, or abuse of
this product and/or any product or accessory required to operate this product.
󱇲 In no case shall FX‘s liability exceed the monetary value of this product.


󱇲 Be sure that your operating frequency is clear before turning on or running your
model, and never share the same frequency with somebody else at the same
time. Ensure that others are aware of the operating frequency you are using and
when you are using it.
󱇲 Use a transmitter designed for ground use with RC cars. Make sure that no one
else is using the same frequency as yours in your operating area. Using the
same frequency at the same time, whether it is driving, ying or sailing, can
cause loss of control of the RC model, resulting in a serious accident.
󱇲 Always turn on your transmitter before you turn on the receiver in the car. Always
turn off the receiver before turning your transmitter off.
󱇲 Keep the wheels of the model off the ground when checking the operation of the
radio equipment and working on your engine.
󱇲 Disconnect the battery pack before storing your model.
󱇲 Exercise care when using tools and sharp instruments.
󱇲 Take care when building and operating, as some parts may have sharp edges.
󱇲 When learning to operate your model and working on your engine, go to an
area that has no obstacles that can damage your model if your model suffers a
collision.
󱇲 If the model behaves strangely, immediately stop the model, check and resolve
the problem.
󱇲 Remove any sand, mud, dirt, grass or water before putting your model away.
󱇲 This product is not suitable for children under 16 years of age without the direct
supervision of a responsible and knowledgeable adult.
󱇲 This model engine is designed exclusively for installation into model cars.
Never use it for any other purpose as it may cause personal injury or mechanical
failure.
󱇲 Mount the engine in your model securely, following the manufacturer‘s
recommendations, using appropriate fasteners.
󱇲 Assembly and operate this product only in places away from the reach of
children.
󱇲 When you operate an engine, keep children and others away from you and the
engine. Anyone who is not operating the engine should remain at least 6 meters
away from the engine.
󱇲 Keep small parts out of reach of small children. Children must not be allowed to
put any parts in their mouth, or pull vinyl bag over their head.
󱇲 Immediately after using your model, do NOT touch equipment on the model such
as the engine, mufer or manifold because they generate high temperatures.
You may seriously burn yourself by touching them.
󱇲 Do not put ngers or any objects inside or near rotating and moving parts, as
this may cause damage or serious injury as your nger, hair, clothes, etc. may
get caught.
󱇲 Follow the operating instructions for the radio equipment at all times.



󱇲 To prevent any serious personal injury and/or damage to property, be responsible
when operating all remote controlled models.
󱇲 The model car is not intended for use on public places and roads or areas where
its operation can conict with or disrupt pedestrian or vehicular trafc.
󱇲 Because the model car is controlled by radio, it is subject to radio interference
from many sources that are beyond your control. Since radio interference can
cause momentary loss of control, always allow a safety margin in all directions
around the model in order to prevent collisions.
󱇲 Never operate the engine-equipped model alone. Remember that operating any
model with engine requires skills and continuous safety precautions. When you
operate a model, you should ask for the assistance of an experienced person
who can accompany you, recognize emergency situations nearby, and has
enough experience avoiding possible dangers.
󱇲 Always test the brakes and the throttle before starting your engine to avoid
losing control of the model.
󱇲 Check the throttle linkage connections before starting and running the model
car. If any connections fail, it may cause personal injury.
󱇲 Before starting the engine, always check the tightness of all fasteners especially
those on joints and moving parts such as the throttle arm. Failure to re-tighten
loose fasteners often causes part breakages that are capable of harming you.
󱇲 Keep your face, hands, and body away from the spinning ywheel, gears and
other objects on the model or engine to prevent injury. If the tires, ywheel or
gears break, ying pieces may result in personal injury.
󱇲 In order to avoid ear damage, use an effective silencer (mufer) for sound
reduction. Always wear ear protection.
󱇲 Keep loose objects such as shirt sleeves, neckties, and scarves away from the
spinning tires, ywheel, and gears.
󱇲 Be careful not to drop any objects such as screwdrivers, pencils, utensils, etc
into the spinning tires, ywheel, and gears. If these objects contact moving
engine or transmission parts, it may cause mechanical breakage and personal
injury.
󱇤 Near real cars, animals, or people that are unaware that an RC car is being
driven.
󱇤 In places where children and people gather.
󱇤 In residential districts and parks.
󱇤 In limited indoor spaces.
󱇤 In wet conditions.
󱇤 In the street.
󱇤 In areas where loud noises can disturb others, such as hospitals and
residential areas.
󱇤 At night or anytime your line of sight to the model may be obstructed or
impaired in any way.
󱇲 Do not use your model:


󱇲 Store fuel in a cool, dry, dark, well-ventilated place, away from heating devices,
open ames, direct sunlight, or batteries. Keep nitro fuel away from children.
󱇲 Do not leave the fuel in the carburetor or fuel tank when the model is not in use.
There is danger that the fuel may leak out.
󱇲 Wipe up any spilled fuel with a cloth.
󱇲 Be aware of spilled or leaking fuel. Fuel leaks can cause res or explosions.
󱇲 Do not dispose of fuel or empty fuel containers in a re. There is danger of
explosion.
󱇲 If someone’s skin or face has been splashed with fuel, rst wash it away with
soap and water, then immediately consult a physician. If you swallow fuel, it
is imperative to seek immediate medical treatment. Failure to undergo such
treatment may endanger your life.
󱇲 Never run your engine without an air lter. Your engine can be seriously
damaged if dirt and debris get inside the engine.
󱇲 Immediately after the engine has been run there exist conditions when the
engine may restart if it is rotated over compression without the glow plug battery
being reconnected.
󱇲 When checking the electric conduction to the glow plug, use a tool or clamp
to handle. Never touch the wire plug or cable directly by hand. In this situation
keep your face away from heated portion. Seething fuel may spout out and
cause a skin burn.
󱇲 Make sure the air lter is clean and oiled.
󱇲 Excessively rich running and prolonged low speed running should be avoided.
Prolonged low speed running and low temperature running may result in the oil
in the fuel becoming gelled and the piston/liner becoming stuck together.

󱇲 Handle fuel only outdoors. Never handle nitro fuel indoors, or mix nitro fuel in a
place where ventilation is not appropriate.
󱇲 Only use nitro fuel for RC models. Do not use gasoline or kerosene in RC models
as it may cause a re or explosion, and ruin your engine.
󱇲 Nitro fuel is highly inammable, explosive, and poisonous. Never use fuel
indoors or in places with open res and sources of heat.
󱇲 Always keep the fuel container cap tightly shut.
󱇲 Always read the warning label on the fuel container for safety information.
󱇲 Nitro-powered model engines emit poisonous vapors and gasses. These vapors
irritate eyes and can be highly dangerous to your health. We recommend
wearing rubber or vinyl gloves to avoid direct contact with nitro fuel.
󱇲 Do not operate near open ames or smoke while running your model or while
handling fuel.
󱇲 Nitro fuel for RC model cars is made of the combination of the methyl alcohol,
castor or synthetic oil, nitro methane, etc. The ammability and volatility of
these elements is very high, so be very careful during handling and storage of
nitro fuel.
󱇲 Pour all the remaining fuel out of the fuel tank after every use. Never pour
fuel back into the original fuel bottle after use; once the fuel is out of the
original container and exposed to air, the quality of the fuel is affected and it
deteriorates.
󱇲 Some parts will be hot after operation. Do not touch the exhaust or the engine
until they have cooled. These parts may reach 135°C (275°F) during operation!
󱇲 Keep nitro fuel away from open ame, sources of heat, direct sunlight, high
temperatures, or batteries.



󱇲 FX guarantees that all parts of a newly-purchased engine are manufactured with
the highest regard to quality. However, due to the many factors inherent in model
racecar competition, FX cannot guarantee any parts once you start the engine.
󱇲 FX guarantees this product to be free from defects in both material and
workmanship within 30 days of purchase.
󱇲 The total monetary value under warranty will in no case exceed the cost of the
original product purchased.
󱇲 FX has no control over usage of this product once it leaves the shop, therefore
FX can only offer warranty against all manufacturer‘s defects in materials,
workmanship, and assembly at point of sale and before use.
󱇲 Any and all warranty coverage will not cover replacement of any part or component
damaged by neglect, abuse, or improper or unreasonable use or as a result of
wear. This includes but is not limited to damage from crashing, chemical and/
or water damage, excessive moisture, improper or inadequate maintenance, or
user modications which compromise the integrity of components or using
non-original parts and equipment such as glow plugs, mufers, etc.
󱇲 Any parts missing from this product must be reported within 30 days of
purchase.
󱇲 No part or parts will be sent under warranty without proof of purchase.
󱇲 Should you nd a defective or missing part, contact the local distributor.
󱇲 Service and customer support will be provided through the local hobby store
where you have purchased the product, therefore make sure to purchase any FX
products at your local hobby store.
󱇲 This product is considered to be a high-performance racing engine. As such this
product will be used in an extreme range of conditions and situations, all which
may cause premature wear or failure of any component at any time.
󱇲 No warranties are expressed or implied that cover damage caused by what is
considered normal use, or cover or imply how long any components or parts
will last before requiring replacement.
󱇲 Due to the high performance level of this product you will need to periodically
maintain and replace consumable components.
󱇲 Do not modify the engine or any parts of it in any way. Any modications will
void the warranty immediately.
󱇲 FX does not pay nor refund shipping on any component sent to FX or its
distributors for warranty.
󱇲 FX reserves the right to make the nal determination of the warranty status of any
component or part.
󱇲 Some small scratches may be visible on some of the components and is not
considered a manufacturing defect.




Special silicone fuel tube is required to connect the fuel
tank to the engine.

#154065 HUDY Slotted Screwdriver for Engine #4.0mm - Long
#111545 HUDY Allen Wrench #1.5mm
#112045 HUDY Allen Wrench #2.0mm
#112545 HUDY Allen Wrench #2.5mm
#107612 HUDY Exhaust Spring / Caster Clip Remover

To start the engine use professional starter box with a high
torque motor.
#104400 HUDY Star-Box On-Road 1/10 & 1/8
#104500 HUDY Star-Box Off-Road 1/8

A glow plug starter is required to ignite the glow plug for
starting. Use a high-quality battery-operated glow plug
starter.

A glow plug wrench is required for removing/installing the
engine glow plug.
#107581 HUDY Glowplug Wrench # 8mm / Clutchnut #
10mm Long

A temperature gauge is useful to check the engine
temperature during the break-in period as well during
every run on the track to verify your engine works within the
standard heat limits.

Please refer to the exploded view sheet to see what all parts are included with your
engine. Typically an FX engine includes:

(1 piece)

(1 piece)

(1 piece)

(1 piece)

(1 piece each)



We recommend using after run oil to extend the lifetime of
your engine.
#106250 HUDY Engine After Run Oil

A two-stage foam air lter must be used at all times.

To install the engine in the car you need rst to install the
complete clutch system on the engine. The clutch system &
ywheel collar should be included with your car kit.

High quality air lter oil is required to prevent debris to get
into the engine.
#106240 HUDY Air Filter Oil

To break-in the engine we recommend using an RC car
engine break-in bench.
#104140 HUDY Engine Break-In Bench

Recommended for servicing and replacing the ball-bearings
in the engine.
#107050 HUDY Ultimate Engine Tool Kit for .12 Engines
#107051 HUDY Ultimate Engine Tool Kit for .21 Engines

Use pliers to install ball linkages and to check glow plug.
#189020 HUDY Micro Pliers - Combination
#189030 HUDY Micro Pliers - Long Nose

It is suggested to use high-quality RC car fuel with 16~30%
nitro methane.

A fuel lter is recommended to prevent debris from getting
into the engine.

For lling the fuel tank, a fuel bottle with a suitable spout
is required.
#104200 HUDY Fuel Bottle with Aluminum Neck

A motor spray is required for cleaning the engine after each
run.

Special ywheel tool will be required to install the clutch
system on your engine.
#182010 HUDY Flywheel / Clutch Multi-Too
#182015 HUDY Flywheel / Wheel Nut Multi-Tool 1/8 Off-Road



To get maximum performance and life time from your engine you need to work
and approach the engine with very specic and detailed care and attention. Every
small detail matters and has a signicant inuence on the performance, reliability
and life time.

To make the engine leaner Means to tighten (close) the main (high-speed)
needle CW (to the right).
To make the engine richer Means to loosen (open) the main (high-speed)
needle CCW (to the left).

The engine temperature should not fall below   at any point while
it is being operated.

In cases where your engine reaches temperatures higher than ,
immediately stop the engine as you risk serious damage to the engine.

To adjust a needle or screw on the carburetor we refer to a fraction of a turn, for
example 1/12, 1/4, 1/2, etc. Sometimes the fraction of the turns are also called
“hours“, for example 1/12 of a turn equals to 1 hour.

During all the operations with your engine you need to regularly check for the
temperature of the engine. To measure the temperature use a high-quality
temperature infrared gauge and measure the temperature inside the engine head in
the area of glow plug and from the side of the engine head.
The working temperature of the engine should be in between range 100~130°C
(212~266°F). The working temperature range always depends on the weather
temperature, humidity, altitude and the track conditions.
The optimum working temperature should be 100~125°C (212~257°F) when the
air temperature is in the range of 5~30°C (41~86°F).
󱇲 The lower air temperature, the lower temperature of the engine will be.
󱇲 The higher air temperature, the higher temperature of the engine will be.
󱇲 The leaner the engine setting, the higher working temperature will be.
󱇲 The more rich the engine setting, the lower working temperature will be.
1/12 = 1/12 = 1 hour
2/12 = 1/6 = 2 hours
3/12 = 1/4 = 3 hours
4/12 = 1/3 = 4 hours
5/12 = 5/12 = 5 hours
6/12 = 1/2 = 6 hours
7/12 = 7/12 = 7 hours
8/12 = 2/3 = 8 hours
9/12 = 3/4 = 9 hours
10/12 = 5/6 = 10 hours
11/12 = 11/12 = 11 hours
12/12 = 1 = 12 hours