Toyan Engine FS-S100 Series Operator's manual

USER’S INSTRUCTION MANUAL
FS-S100X & FS-S100GX

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First of all, thank you for choosing our products. The FS-S100x series is a very precise single
cylinder four-stroke model engine. It is of vital importance, before attempting to operate your
engine, to read the general ‘SAFETY INSTRUCTIONS AND WARNINGS’ section on pages 3-5 of
this booklet and to strictly adhere to the advice contained therein.
Also, please read the entire contents of this instruction manual, so as to familiarize yourself with
the controls and other features of the engine.
Keep these instructions in a safe place so that you may readily refer to them whenever necessary.
It is suggested that any instructions supplied with the vehicle, radio control equipment, etc., are
accessible for checking at the same time.

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CONTENTS
ABOUT YOUR TOYAN ENGINE ----------------------------------------------------------3～5
BASIC STRUCTURE AND PARTS----------------------------------------------------------6~7
ENGINE INSTALLATION ------------------------------------------------------------------8~9
NOTES ON ENGINE START---------------------------------------------------------------10~14
STABLE RUNNING AND ADJUSTMENT--------------------------------------------------15～21
REGULAR CARE & MAINTENANCE ------------------------------------------------------22～24
PARTS REPLACEMENT -------------------------------------------------------------------25
INVESTIGATION METHOD OF ENGINE FAILURE TO START-----------------------------26～27
THREE VIEW DRAWING -----------------------------------------------------------------28～29
MULTI-VIEW DRAWING -----------------------------------------------------------------30
EXPLODED VIEW DRAWING -------------------------------------------------------------31
STARTING MOTOR INSTALLTION INSTRUCTIONS---------------------------------------32
OUR COMMITMENT----------------------------------------------------------------------33

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ABOUT YOUR TOYAN ENGINE
Remember that your engine is not a “toy”，but a highly efficient internal-combustion machine
whose power is capable of harming you, or others, if it is misused.
As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion
and care at all times.
If at some future date, your Toyan engine is acquired by another person, we would respectfully
request that these instructions are also passed on to its new owner.
■The advice which follows applies basically to ALL MODEL ENGINES and is grouped under two
headings according to the degree of damage or danger which might arise through misuse or
neglect.
WARNING: These cover events which might involve serious (in extreme circumstances,
even fatal) injury.
●Model engine fuel is poisonous. Do not allow it to come into contact with the eyes or mouth.

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Always store it in a clearly marked container and out of the reach of children.
●Model engine fuel is also highly flammable. Keep it away from open flame, excessive heat,
sources of sparks, or anything else which might ignite it. Do not smoke or allow anyone else to
smoke, near to it.
●Never operate your engine in an enclosed space. Model engines, like automobile engines,
exhaust deadly carbon-monoxide. Run your engine only in an open area.
●Model engines generate considerable heat. Do not touch any part of your engine until it has
cooled. Contact with the muffler (silencer), cylinder head or exhaust header pipe, in particular,
may result in a serious burn.
●This engine is intended for model cars. Do not attempt to use it for any other purpose.
●Mount the engine in your model securely, following the manufacturers’ recommendations,
using appropriate screws and locknuts.
●Fit an effective silencer (muffler). Frequent close exposure to a noisy exhaust (especially in the

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case of the most powerful high speed engines) may eventually impair your hearing and such
noise is also likely to cause annoyance to others over a wide area.
●The wearing of safety glasses is also strongly recommended.
●Take care that the glowplug clip or battery leads do not come into contact with rotating parts.
Also check that the linkage to the throttle arm is secure.
●For their safety, keep all onlookers (especially small children) well back (at least 10 feet or 3
meters) when preparing your model for running.
●To stop the engine, fully retard the throttle stick and trim lever on the transmitter, or in an
emergency, cut off the fuel supply by pinching the fuel delivery tube from the tank.
●Do not attempt to disassemble the recoil starter.
●Do not extend the starter cord more than 20cm (8”).
●When starting the engine, please do not press the startup key for a long time. The maximum
time for each key to start is 5 seconds. If not, Please stop for 15 second, then press the start key
to start, so as not to burn the start motor and ignition circuit for a long time.

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BASIC STRUCTURE AND PARTS
muffler
engine hood throttle screw
cylinder head auxiliary oil needle
main oil needle carburetor
oil inlet throttle rocker arm
starting motor booster nozzle
engine body exhaust pipe
starting belt flywheel screw nut
flywheel hall bracket
crankcase （only match FS-S100G）
main start pulley

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BASIC STRUCTURE AND PARTS
spark plug
timing synchronization belt
guide wheel
timing synchronous pulley
camshaft
guide axle
wheel cooling fan fan blade
crankcase chassis oil discharge nozzle

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Make sure that the vehicle’s engine mounting surfaces are level and in the same plane. Poor
installation may cause distortion of the crankcase, bearings, etc., resulting in erratic running and
loss of performance. The recommended screws for securing the engine are 3.0mm inner
hexagonal socket type. If existing holes in the engine mount do not align perfectly with engine
installation hole. Do not force installation to avoid pressing the screws. If installed on other engine
platforms, it is recommended to purchase adjustment pads and install them between engine mount and
engine.
Please select the correct and stable engine mount Do not use unstable or defective engine mount

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If the width of engine mount needs to be adjusted, please purchase TOYAN special adjustment pad.

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NOTES ON ENGINE START
For personal safety, it is strongly recommended not to disassemble the engine and start-up
mechanism. If you encounter start-up problems, you can contact local distributors or
TOYAN technicians to solve them. If you need to return to the factory for testing, TOYAN
will provide you with high-quality after-sales service. If there is a bad situation caused by
private disassembly, you will bear the corresponding responsibilities and costs.
1. GLOW PLUG(SPARK PLUG):
FS-S100x series requires 1 glowplugs, specially designed for four-stroke methanol engines. With
a glowplug engine, ignition is initiated by the application of a 1.5-volt power source. When the
battery is disconnected, the heat retained within the combustion chamber remains sufficient to
keep the plug filament glowing, thereby continuing to keep the engine running. When the top
dead point of compression is reached, the "automatic" ignition explosion will be realized, while
the electric heat plug remains in a high temperature state, under reduced load, allowing higher
rpm. Conversely, at reduced rpm, the plug becomes cooler. If the speed is too low, the ignition

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will stop and the engine will stop, so you can control the engine speed by adjusting the Throttle
to achieve the best effect you want. (FS-S100G series needs a 1/4-32 dysprosium ME8 spark plug,
the spark plug needs to be ignited by special CDI control, when Hall detects that the piston runs
well. At the top stop, the spark plug will ignite, ignite the fuel, and produce work).
2. FUEL:
Use only top quality methanol-based model engine fuel. Self-made or counterfeit or inferior fuel
will greatly reduce the performance and life of the engine. As it is a four-stroke engine, in order
to ensure the normal operation of the engine, we recommend a fuel containing 20-25%
nitromethane , If the high nitro fuel is used, the ignition time and cylinder pressure of the engine
will be greatly affected and the normal and stable operation will not be maintained. When the
nitro content of the fuel increases or the fuel brand changes, it is recommended to use oil-rich
needle adjustments to run the engine so that the optimum setting of the new fuel can be
re-examined. (For gasoline fuel, please adjust the ratio from 1:25 to 1:30. The engine oil is 2T
internal combustion engine oil).

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Reminder!
When engines are run at very high speeds and on high-nitro fuels, glowplug elements will not last
as long. Please pay attention again, model engine fuel is poisonous. Do not allow it to come into
contact with the eyes or mouth. Always store it in a clearly marked container and out of the reach
of children, Model engine fuel is also highly flammable. Keep it away from open flame, excessive
heat, sources of sparks, or anything else which might ignite it
3. FUEL TANK:
It is suggested to use a 100 cc tank. The installation of the tank should be kept on the same
plane as the engine. The difference between the fuel output port of the tank and the fuel input
port of the carburetor should be kept within 1 cm (only the carburetor is higher than the fuel
output port of the tank). Excessive drop will reduce the working efficiency of the carburetor and
have adverse effects on the start-up of the engine. In order to ensure clean fuel supply, please
use standard 5 mm silicone tubing and install oil filter correctly. As the engine itself relies on
negative pressure to absorb oil, it is recommended to use muffled exhaust pipe pressure nozzle

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to provide pressure to the tank.
4. START-UP POWER SUPPLY:
FS-S100x series has been installed starting motor, can achieve a one-click start, you only need to
buy standard 7.4V 25C lithium battery to achieve rapid start-up. Starting batteries with too low
or too high voltage will not guarantee the service life of starter motor. Do not use starter
batteries with incorrect voltage.
5. START-UP ENVIRONMENT:
Start the engine in an open, airy environment to avoid discomfort caused by burnt gases.
6. START-UP PLATFORM:
Since the engine will generate some vibration after starting, please place it on a stable and flat
platform to start.
7. HEAT DISSIPATION:
As the engine has been forced to dissipate heat by fans, high-speed rotating fan blades will be
dangerous. Do not touch them with your hands. If cracks are found in the blades during use,

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please purchase and replace them in time.
Reminder!
Every time when starting the engine, please carefully check whether the blades have cracks. If
cracks have occurred, they must be replaced to avoid the danger of blade ejection in high-speed
operation.

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STABLE RUNNING AND ADJUSTMENT
NOTES!
Four-stroke engine has stronger torque output than two-stroke engine, so corresponding
measures should be taken in operation.
In the interests of a long working life and high performance, every engine has been“run-in”at
the factory. After receiving the engine, you need to do the correct running-in and cleaning work.
After continuous running-in, the cylinder pressure will gradually increase. Because of its high
simulation and many parts, we do not recommend that you disassemble the engine completely.
We will provide all kinds of effective aftersales to help you maintain and use it steadily.

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1. Timing Synchronization Belt and Camshaft Box Inspection：
Due to the use of overhead
cams, Please add solid grease
to ensure stable operation and
avoid dry friction of cams.
Timing synchronization belt sequence diagram, please
make sure that the marker points are in the same position.
Make sure that lubricating paste has been added to the
camshaft box, and it can not run without lubrication.

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2. Power Inspection：
●Make sure that the voltage of 1.5V universal ignition power supply is normal and the storage
power is full.
●Make sure that the 7.4V start-up battery voltage is normal and the storage capacity is full.
3. Initial needle setting：
The prerequisites here are ample lubrication and cooling. Such a condition is achieved by
having the engine operate on an extremely rich needle-valve setting: the excess oil not only
provides an abundance of lubrication; it also conducts away heat from the surrounding metal
and this is further assisted by the partial evaporation of the alcohol content of the fuel. it is a
four-stroke engine with inlet pipe and carburetor mounted high on the cylinder-head, means
that each charge of rich, cooling, fuel-air mixture is admitted directly into the cylinder, instead
of being pre-heated in a lengthy journey via the crankcase , as in the usual two-stroke model
car unit.
With the help of fan cooling, it can provide excellent operation experience for every enthusiast.

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You can also purchase TOYAN series of water-cooled heat dissipation accessories, so that your
engine will be able to maintain long-term stable work.
Reminder!
When leaving the factory, each engine has completed the needle setting. If you have adjusted the
needle during use, it is recommended that the main needle be adjusted to 2.0 laps and the auxiliary
needle to 1.5laps. Since the methanol engine needs to keep the filament temperature of the
electric plug in order to realize ignition, when the engine is in the oil-rich state for a long time at
low speed, the filament temperature will gradually decrease, resulting in ignition difficulties, so it
is necessary to pull high speed oil at intervals to avoid oil-rich at low speed.
Since the four-stroke engine requires a large amount of air intake, it is very important to Set the
throttle-stop screw so that the minimum throttle opening (idle setting) is approximately 1.5mm. For the
use of various engine enthusiasts, do not use strong force to twist the throttle screw to adjust the size of
the throttle opening. but to loosen the throttle screw and then pull the throttle arm to adjust. As shown
in the figure:

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4. STARTING
Reminder!
It is very important to set the throttle in the correct position before attempting to start the engine.
It is recommended to set the damper to open at 30% to prevent the engine from opening too much
under "no load" conditions, which will quickly overheat and may seriously damage the engine
piston ring and cylinder liner.
Loosen throttle
screw and adjust
throttle size
Keep the throttle
opening larger
than 1.5mm