
RS-L200
OPERATING MANUAL

拓陽精密科技
1
Thank you for Choosing our products,RS-L200X series is a set with Precise rotary model
engine,Before assemblying and 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 and familiarize engine controls and other functions.Furthermore,Keep these
instructions in a safe place so that you may readily refer to them whenever Necessary.

拓陽精密科技
2
CATALOGUE
SAFETY INSTRUCTIONS AND WARNINGS-------------------------------------------------3~4
BASIC STRUCTURE AND PARTS------------------------------------------------------------5~6
ENGINE INSTALLATION-----------------------------------------------------------------------7
ATTENTION ABOUT STARTING -----------------------------------------------------------8 ̄10
OPERATION AND ADJUSTMENT--------------------------------------------------------11~14
CARE AND MAINTENANCE--------------------------------------------------------------14~15
PARTS REPLACEMENT------------------------------------------------------------------------16
INVESTIGATION METHOD OF ENGINE FAILURE TO START---------------------------------17
THREE VIEW DRAWINGS ---------------------------------------------------------------------18
MULTI-VIEW DRAWING ----------------------------------------------------------------------19
EXPLODED VIEWS ----------------------------------------------------------------------------20
INSTALLATION INSTRUCTIONS OF START MOTOR -----------------------------------------21
SCHEMATIC DIAGRAM OF INLET AND OUTLET OF RS-L200X WATER COOLING ENGINE ---
--------------------------------------------------------------------------------------------22~23
COMMITMENT--------------------------------------------------------------------------------24

Remember that your engine is not a "toy", but a high-efficiency internal combustion engine,
the output power may cause you harm, or other effects, do not change or disassemble.
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 (in extreme 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, nearto 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,cylinder head or exhaust header pipe, in particular, may result
in a serious burn.
拓陽精密科技
3
SAFETY INSTRUCTIONS AND WARNINGS

拓陽精密科技
4
ATTENTION
●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.
●Tobe 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.

拓陽精密科技
5
BASIC STRUCTURE AND
COMPONENTS
Oil inlet
Throttle screw
Air inlet
Throttle rocker arm
Idle mixture
Exhaust pipe
Gasket
Water inlet
Rear housing
Rear plate
Air outlet
Water outlet

拓陽精密科技
6
BASIC STRUCTURE AND
COMPONENTS
Front housing
Crankshaft
Flywheel
Air inlet box
Needle valve
Oil needle base
Guidepost

拓陽精密科技
7
ENGINE INSTALLATION
If the width of engine bracket needs to be
adjusted, please buy TOYAN special
adjustment pad
Make sure the surface of engine mounting is level and in the same plane. Improper installation may
lead to crankcase, bearing deformation, resulting in unstable operation and performance decline.
Recommended 3.0mm hexagon screws for securing the engine. If the existing holes on the engine
bracket cannot be completely aligned with the engine mounting holes, do not force the installation
to pressure screws. If installed on other engine platforms, it is recommended to purchase adjustment
pads and install them between bracket and engine.
Do not use unstable or defective engine
supports
Please use correct and stable engine
bracket

拓陽精密科技
8
ATTENTION ABOUT STARTING
For personal safety, it is strongly recommended not to disassemble the engine and start-up me
chanism. If you encounter start-up problems, you can contact local distributors or TOYAN tech
nicians to solve them. If you need to return to the factory for testing, TOYAN will provide you
with full support after-sales,If there is a bad situation caused by private disassembly, you will
b ear the corresponding responsibilities and costs.
1. GLOW PLUG:
RS-L200X series requires 2pcs special glow plug for a twin four-stroke methanol engine,
which is started by using 1.5 volt power supply. When the battery is disconnected, the heat
retained in the chamber is still enough to heat the filament to keep the engine running. When
top center compression position is reached, an "automatic" ignition burst is achieved, while
the spark plug remains at high temperature, allowing for higher rotational speeds while the
load is reduced. In contrast, if the RPM is low, the spark plug will cool, and if the RPM is too
low, the ignition will stop, and then the engine will stop. Therefore, you can control the
engine speed by adjusting the damper to achieve the best effect you want.
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 20-25%
nitro methane fuel can be used.

拓陽精密科技
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. 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
4. START-UP POWER SUPPLY:
RS-L200X need purchase start motor extra and 11.1C 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.
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 fuel increases or the brand of fuel change , it is recommended to use oil-rich needle
adjustments to run the engine so that the optimal setting for the new fuel can be rechecked,
(please adjust the ratio of gasoline fuel to 1:25 to 1:30, and use 2T engine oil).
9

拓陽精密科技
10
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:
Please start the engine in an open, airy environment to avoid discomfort from burning gases
6. START-UP PLATFORM:
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
Reminder!
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

拓陽精密科技
11
2. POWER INSPECTION:
●Make sure that the voltage of 1.5V ignition power supply is normal and the storage power is full.
(No ignition power supply is needed when using three in one electrical regulation)
●Make sure that the 11.1V universal battery voltage is normal and the storage capacity is full.
3. INITIAl 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. You can also buy the TOYAN series of
water cooling accessories, so that your engine will be able to maintain stable operation for a long
time.
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 pair of main oil needle be adjusted to 2.0 laps and
the pair of auxiliary oil needle to 1.5 laps. 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.

12
Keep the throttle
opening larger
than 1.5mm
Loosen throttle
screw and adjust
throttle size
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. STARTING
Reminder!
It is important to put the throttle in the right position before starting the engine. It is
recommended that the 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.

拓陽精密科技
13
Connect the spark plug battery and press the start button. Once the engine starts, disconnect
the spark plug battery 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:
●Oil-rich
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
●Oil-poor
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
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

拓陽精密科技
14
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
RS-L200x series 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 thecarburetor.
● 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
●Glow Plug must be treated as consumables. Long running glow 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;

拓陽精密科技
15
●The time to replace the glow plug. expect burned, It also need to be replaced on these situations
because it no longer provides optimal performance,For example:
a.The surface of the filament becomes rough and white
b.Filament curl deformation
c.External material adhered to the filament or plug corrosion
d.The engine will power off when idling
e.The power went out after the engine started
●At the end of each operation, empty the fuel tank, energize the glow 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 l
ubricant for each operation
◆
Use fuels containing a moderate percentage of nitromethane;
◆Do not overtilt the engine and do not connect the battery while adjusting;

拓陽精密科技
16
ATTENTION!
These maintenance programs will be stored after a period of time, and there is a risk ofcorrosion
or startup difficulties, if you need someone to deal with, please contact us
PARTS REPLACEMENT
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
yo u 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
dea ler 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.

拓陽精密科技
17
INVESTIGATION METHOD OF ENGINE FAILURE TO START
If the engine fails to start, check the following carefully:
●Whether the battery voltage is normal, whether the power is full
●Whether the glow plug has failed
●Whether the fuel can reach the carburetor smoothly
●Do not start the engine when it is flooded. Remove the glow 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

拓陽精密科技
18
57.1
RS-L200X Specification
68.1
51.1
·Displacement: 2.46cc×2
·Rotary: Double
·Carburetor: Single
·Practical rpm: 3000-20500rpm
·Power: 1.26ps@19600rpm
·Weight: 446g
THREE VIEW DRAWING

拓陽精密科技
19
MULTI-VIEW DRAWING

拓陽精密科技
20
EXPLODED VIEW DRAWING

拓陽精密科技
21
START-UP DIAGRAM
Counterclockwise
rotation start

拓陽精密科技
22
Schematic diagram of inlet and outlet
of RS-L200X Water cooling engine 1
Water inlet
Water outlet
Water cooling duct parts
(underwater inlet and
outlet)
Attention:
1.In case of no cold liquid inside
the gear pump, low speed may
not absorb water, please
improve the speed at this time.
2. The coolant should be cooled
down, otherwise it will not
absorb water if the temperature
is too high.
3. The water cooling pump will
not absorb water beyond its
service life. Please replace
gasket and oil seal at this time.

拓陽精密科技
23
3
Schematic diagram of inlet and outlet
of RS-L200X Water cooling engine 2
Note: water tank, bracket and water pipe need
to be purchased separately

拓陽精密科技
24
Our Commitment
●Please contact a TOYAN dealer in your country or location. If you buy through the Internet,you
can also get various parts and complete services through the Internet. Detailed information about
each part can be obtained from the dealer
●In the process of use, we have a professional team to answer your technical or usage questions
online for free
●If your distributor is unable to perform its technical services, we will provide you with direct
technical support

拓陽精密科技
请关注公众号
拓 陽 精 密 科 技 ● 中國 ● 2022
