Toyan Engine FS-S100AT Setup guide

OWER'S INSTRUCTION MANUAL
FS-S100AT

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Thank you for Choosing our products,Model FS-S100AT is one kit with Precise Single Cylinder Four-stroke
model engine,. Before operating your engine, please read the "safety instructions and warnings" section on pages
3-4 of this booklet ,to strictly adhere to the advice contained therein
>Also,Please study the entire contents of this instruction manual,so as to familiarize yourself with engine
controls and other functions.
>Furthermore,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 radio control equipment,please check at the same time.

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CONTENTS
ABOUT YOUR TOYAN ENGINE----------------------------------------------------------------------------------------------3~4
BASIC STRUCTURE AND COMPONENTS---------------------------------------------------------------------------------5~6
INSTALLATION---------------------------------------------------------------------------------------------------------------------7
ATTENTION ABOUT STARTING--------------------------------------------------------------------------------------------8~10
OPERATION AND ADJUSTMENT----------------------------------------------------------------------------------------11~14
CARE AND MAINTENANCE-----------------------------------------------------------------------------------------------15~17
REPLACEMENT OF RUNNING PARTS----------------------------------------------------------------------------------------18
TROUBLESHOOTING METHOD FOR ENGINE FAILURE------------------------------------------------------------------19
ENGINE THREE VIEW DRAWINGS----------------------------------------------------------------------------------------- -20
MULTI-VIEW---------------------------------------------------------------------------------------------------------------------21
EXPLODED VIEWS--------------------------------------------------------------------------------------------------------------22
INSTALLATION INSTRUCTIONS FOR START MOTOR----------------------------------------------------------------- --23
OUR COMMITMENT--------------------------------------------------------------------------------------------------------- 24

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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 or abused.
As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all
times.
As a professional user, please make sure the engine runs safely and carefully.
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 for all production engines ,Incorrect operation or Ignore safety can lead to engine damage or
danger
Warning: These cover events which might involve serious (inextreme circumstances, even fatal ) injury.
●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 an 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.

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●Model engines generate considerable heat. Do not touch any part of your engine until it has cooled. Contact with the
muffler,cylinder head or exhaust header pipe, in particular, may result in a serious burn.
NOTES:
●This engine was designed for science experiments, model demonstrations, model car drives. 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.
●Noise will happen when starts, please buy our matching muffler exhaust pipe or run away from the living
environment, because the noise of the operation may irritate others
●Safety glasses are strongly recommended
●Please note that the electric plug or battery wire should not touch the rotating parts. Also check whether the
connection of the throttle rocker arm is firm
●To be safe, keep all spectators (especially children) at least 3 meters away from engine when start the engine
●If you want to stop engin, shut off the throttle completely. In an emergency, clamp the fuel line in front of the carburetor
to cut off the fuel supply
●Do not attempt to remove the flywheel and start the synchronous pulley
●Do not extend the starting battery wire by more than 20cm. Otherwise, the starting current will be insufficient due to
the resistance voltage drop inside the battery line
●When starting the engine, please do not press the start button for a long time. The maximum starting time is 5 seconds.
If it does not start, please stop for 15 seconds and press the button to start again, so as not to burn the starting motor
and ignition circuit due to the long starting.

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BASIC STRUCTURE AND COMPONENTS
Engine Hood Idle screw
Cylinder head Throttle rocker arm
Carburetor
Fuel inlet Needle Valve
Start motor Muffler
Engine main body Pressurization mouth
Start belt Flywheel nut
Flywheel
Crankcase
Start gear

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BASIC STRUCTURE AND COMPONENTS
正時同步皮帶 Timing belt
Guide pulley
Fan blade
Exhaust pipe Cooling fan wheel
Synchronous Pulley
Camshaft
Crankcase bottom case Fuel outlet

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INSTALLATION
Make sure the surface of engine mounting is flush and in the same flat. Improper installation may lead to
deformation of crankcase, bearing, etc. Unstable operation and performance degradation will happen. The 3.0mm
hexagon socket screws are recommended when fixed engine. If the existing hole in the engine bracket is not perfectly
aligned with the engine mounting hole, do not install with force. If installed on other engine platforms, please purchase
adjustment pads to fit between the engine bracket and the engine
Please use the right stable engine bracket Do not use weak or defective engine supports
If the width of engine bracket needs to be adjusted,please purchase TOYAN special adjustment pad

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ATTENTION ABOUT STARTING
For the sake of safety, it is strongly recommended not to disassemble the engine and start the mechanism. If any
starting problems, please contact your local dealer or TOYAN technician to solve them. If return to the factory for testing,
TOYAN will provide you with high-quality after-sales service. If any problem caused by unauthorized disassembly, you will bear
the corresponding responsibilities and expenses
1 .Sparking plug
The Item of FS-S100AT requires a special sparking plug(including already) . , spark plug needs to be done through
the special CDI ignition control, when hall detects display the piston running to the TDC, spark plug will be ignited,
fuel will be ignition,then generate will acting.Therefore, you can control the engine speed by adjusting the damper to
achieve the best effect you want.
Check the relative position of the magnet before starting (as shown below)：
The marking point of the timing pulley is facing
Under the circumstances (see 11P),
Loosen the two screws on the flywheel,
Turn the collar to make the magnet position
To the arrow (45 degree direction),
Tighten two more screws

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2.Fuel
Please use quality guaranteed methanol model engine fuel. Self - dispensing or counterfeit fuel will greatly reduce
the performance and life span of the engine. Since it is a four-stroke engine, in order to ensure the normal
operation of the engine, we require the only 25% nitro methane fuel can be used. If high nitro fuel is used, the
ignition time and cylinder pressure of the engine will be greatly affected, and the normal and stable operation
cannot be maintained.when the nitro content of the fule increases or the fuel brand changes,it is recommended
to use the fuel-rick needle adjustment to run the engine to make sure the best settings for the new fuel can be
rechecked
Remind!
If the engine is running at very high speeds and on high nitro fuel,The life of the spark plug does not last
long,pls use Toyan special sparking plug if needed. Please note that engine fuel is toxic. Keep it out of contact
with eyes or mouth and always store it in a clearly marked container and place, and keep out of reach of
children. It is highly flammable. Keep away from open fires, overheating or any source of ignition
3.Fuel tank:
It is recommended to use a 100cc tank. The tank should be installed on the same flat as the engine. The gap
between the fuel inlet & outlet of the fuel tank and carburetor should be kept within 1 cm (the carburetor must
be higher than the fuel inlet & outlet of the fuel tank). If the gap is too high, the carburetor's working efficiency
will be reduced and the engine will be started adversely. To ensure clean fuel supply, pls use standard 5mm
silicone tubing and properly install oil filters. Since the engine itself relies on negative pressure to absorb oil, it is
recommended the muffling exhaust pipe can be used to pressurize the fuel tank.

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4.Start Power:
FS-S100AT has been installed with a start motor, which can be started with one button. You only need to purchase
standard 7.4v 25C lithium battery to realize quick start. Too low or too high voltage of starting battery will not guarantee
the service life of the starting motor, do not use incorrect voltage starting battery.
5.Environment for starting
Please start the engine in an open, airy environment to avoid discomfort from burning gases
6.Platform for Starting
Since the engine will produce some vibration after starting, please place it on a stable and flat platform
7.Heat dissipation
Since the engine has been cooled by a fan, high-speed rotating fan blades will be dangerous, do not touch. If you
find cracks in the blade during use, please replace in time
Remind!
Every time you start the engine, please carefully check whether there are cracks in the blades.
we must replace new if any cracks to avoid the danger of blade spread out during high-speed operation

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OPERATION AND ADJUSTMENT
Note
Four-stroke engines have stronger torque output than two-stroke engines, so the corresponding measures should be
taken during operation
In order to extend the service life and improve the performance, each engine has been tested at the factory. You
need to do proper running-in and cleaning after receiving the engine. After continuous running in, the cylinder
pressure will be gradually strengthened. Due to the high simulation degree of this engine and the large number of
various parts, we do not recommend you to fully disassemble the engine, we will provide a variety of effective
sales to help you maintain and stable use.
1. Check the timing belt :
Diagram of Timing belt,please confirm that the marking points are consistent

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2. Check the power supply：
•Please confirm that the voltage of 1.5v universal ignition power supply is normal, and full
of electricity
•Please confirm that the voltage of 7.4V CDI starting battery is normal and full of electricity
for gasoline engines
3. Initial Oil Needle Setting：
The prerequisite is adequate lubrication and cooling. The engine is run with very important oil needle settings: The
excess oil not only provides rich lubrication, but also conducts heat from the surrounding metal and further assisted
by the fuel nitro methane. the two-stroke model engines in pre-heating into the cylinder through the crankcase on a
longer trip. But The four-stroke engine, with its intake pipe and carburetor mounted high on the cylinder cap, means
that the rich mixture of cooling fuel and air will flow directly into the cylinder directly.With the help of fan cooling, it
can provide excellent operation experience for every enthusiasts.
Remind!
When leaving the factory, each engine has completed the oil needle setting. If you have misadjusted the oil needle
during the use, it is recommended to adjust the main oil needle to 2.0 laps and the auxiliary oil needle to 1.5 laps. Since
the methanol engine needs to maintain the temperature of the spark plug filament to achieve ignition, when the
engine is in the oil rich state for a long time at low speed, the temperature of the filament will gradually reduce,

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resulting in ignition difficulty. Therefore, it is necessary to up the speed for cleaning oil at intervals to avoid oil
enrichment 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:
4.Start
Remind!
It is important to put the throttle in the right position before starting the engine. It is recommended that the
Loosen the throttle
screw and adjust the
size of the throttle
Please keep the
throttle opening
larger than
1.5mm

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throttle be opened at 30% to start, the engine is not allowed to open the throttle too far under "no load"
conditions, which can quickly overheat and can seriously damage the engine piston ring and cylinder sleeve.
Connect the CDI battery and press the start button。Once the engine starts, Continue to maintain the supply of
CDI and keep the engine running slowly under the oil-rich needle setting. (If necessary, gently adjust the throttle lever
to keep the engine idle steady.) If the engine stops, cooling it for 15 seconds before restarting. Please hold down the
start key within 5 seconds for each start, so as to protect the start motor life. Allow the engine to warm up for 30
seconds after starting so that the oil in the fuel can be fully lubricated to each working part. When the engine rapidly
drops from high speed to low speed, or when low speed rapidly rises to high speed, the engine is unstable or the
throttle control is slow or flashover, please confirm the carburetor working status.
●Rich oil
When the engine has more fuel , smoke is emitted or accelerates slowly, indicating that the engine has excessive oil,
please turn the main oil needle clockwise, 15° as a unit, gradually reduce the main oil needle, until the sound of
engine exhaust is soft and strong, and the exhaust pipe slightly smokes and the lubricates fuel spray out
●Lean oil
If the sound of the engine is too sharp, like the sound of dry friction between metals, the temperature rises rapidly,
and the engine is stopped immediately after acceleration, indicating that the engine has low oil, please turn the main
oil needle counterclockwise, 15° as a unit, gradually reduce the main oil needle, until the sound of engine exhaust is
soft and strong, and the exhaust pipe slightly smokes and the lubricates fuel spray out
●Idling Stop

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When the engine speed changes rapidly, suddenly adjust from the high speed to the low speed, the flameout occurs,
please confirm whether the throttle is closed less than 1.5mm, or gradually reduce the auxiliary oil needle, (clockwise
rotation) gradually adjust the auxiliary oil needle, 20°as units, until the engine maintains a steady idle speed. In the
debugging process, the auxiliary oil needle should not be excessively reduced, so as not to cause engine have lean oil,
we recommend that the minimum value of auxiliary oil needle should not be less than 1 turn)
CARE AND MAINTENANCE:
The series of FS-S100AT is a very precise machine that you need to clean timely. Due to the impact of
environment and the fuel when using, the engine parts have a certain amount of wear and corrosion. So, TOYAN will
also provide you with long-term maintenance services. You can also complete the basic cleaning and maintenance
●Carefully clean the carburetor and remove dirt and grease from the inlet
●If an air filter is used, make sure the filter is clean and free from blockage
●Recommended that the air core used for more than one hour should be replaced in time. Be careful to remove
contaminated filter elements to ensure that dirt does not enter the carburetor
●Do not remove timing synchronous belt, you can use alcohol as a cleaning agent to wipe the belt. Do not use
corrosive detergent to clean synchronous belt, to avoid damage
●Spark Plug must be treated as consumables. Long running spark plug will not ensure the normal operation of the
engine and you can extend its life maintain the performance of the engine if you use it carefully,
◆Use appropriate tools for disassembly

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◆Use fuels containing a moderate percentage of nitromethane
◆Do not overtilt the engine and do not connect the battery while adjusting
●The time to replace the spark plug. expect burned, It also need to be replaced on these situations because
it no longer provides optimal performance, for example:
a: the spark plug have carbon
b: The spark plug electrode is deformed
c: The spark plug electrode is corrosive
●At the end of each operation, empty the fuel tank, energize the spark plug, and try to restart the engine to burn the
possible left fuel in the fuel tank. Repeat this process until the fuel is cleared from the engine.
●Inject some antiseptic oil and briefly start the motor to distribute the oil to the working parts. Do not inject this oil into
the lubricator nozzles, as this may cause the O ring of the carburetor to deteriorate Add solid lubricant to camshaft and
valve tappet to ensure that the CAM axle box has enough lubricant for each operation
●After the engine is running for a certain period of time, some carbon deposits may occur on the bottom surface of the
lower glass (the amount of carbon deposits will be different due to the type of fuel, the mixing ratio of air and oil, and
the combustion conditions), which will affect the observation of the combustion chamber. In this case, the carbon
deposits can be cleaned up as follows:
1、Loosen the M4 fixing screw of the cooling fan drive wheel, and remove the timing belt
2、Loosen the four M3 screws and spring washers on the top tower cover (note: in a diagonal order, completely unscrew
the screws several times, do not unscrew the screws on the same side or individually (to prevent damage to the glass) )

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3、Take off the tower cover, the sealing ring 1, the upper protective glass, the sealing ring 2, the glass upper cover, the
sealing ring 3, and finally take out the lower glass and proceed to clean the carbon deposits (scrape it off gently with a
small blade, and then clean it. Clean the oil stains with a soft cloth);
4、Finally, complete the assembly as shown below and wait for launch.
Tower cover
Seal ring 1
Upper protective glass
Seal ring2
Glass cover
Seal ring3

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Remind!
These maintenance programs will be stored for a period of time, which will cause corrosion risks or
start-up difficulties. If necessary, you can contact us for handling.
REPLACEMENT OF RUNNING PARTS
After long-term operation, the friction between the engine components will cause wear and too large gap, the
replacement of related parts will help you maintain your engine better. When you are in the process of use, there is not
flexible start, power reduction, idle speed instability and so on, please feedback your usage process and poor
performance of the engine to the local dealer or TOYAN, we will serve you wholeheartedly. Parts replacement, we will
provide professional equipment and experienced team. Please do not disassemble the engine without professional tools
to avoid the risk of uncontrollable damage to the engine

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TROUBLESHOOTING METHOD FOR ENGINE FAILURE
If the engine fails to start, check the following carefully:
•Whether the battery voltage is normal, whether the power is full
•Whether the spark plug has failed (spark plug electrode does not discharge)
•Whether the fuel can reach the carburetor smoothly
•Do not start the engine when it is flooded. Remove the spark plug, close the oil needle and press the start button to
drain the excess fuel. (Cover the plug hole with a piece of woolen cloth so that the fuel doesn't spill on you.) If forced to
start without removing the excess fuel, it may cause irreversible damage to the starting system, as well as the
connecting rod and crankshaft to strain and deformation
•Timing belt adjustment
All TOYAN engines have been tested for timing belt position before they leave the factory. After several hours of
execution, the operating power loss or engine running instability is found, the timing belt needs to be tested and
adjusted to get the correct ignition information for the engine. Please check against page 11 of "timing belt timing
diagram"
•When Turn off at low speed, do not keep it at too low speed a long time. Since the methanol engine needs to maintain
the temperature of the spark plug filament to achieve ignition, when the engine is in a rich state for a long time at a low
speed, the temperature of the filament will gradually decrease, resulting shutdown. Therefore, it is necessary wait a
while to up the speed oil and clean the oil to keep the temperature of the filament