TOYAN
TOYAN
FS-L400W
OPERATING MANUAL
TOYAN
拓陽精密科技
Thank you for Choosing our products,Model FS-L400W is one accessories kit with Precise Four
Cylinder Four-stroke model engine,. Before assemblying and operating your engine, please read the
"safety instructions and warnings" section on pages 2-3 of this booklet and contents of accessories
assemblyl,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
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CATALOGUE
SAFETY INSTRUCTIONS AND WARNINGS
--------------------------------------------------------
2～3
INDUCTION
-------------------------------------------------------------------------------------------------
4~09
ASSEMBLY OF COMPENTS
---------------------------------------------------------------------------
10~52
ATTENTION ABOUT STARTING
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53~55
OPERATION AND ADJUSTMENT
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56～59
CARE AND MAINTENANCE
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60～61
REPLACEMENT OF ACCESSORIES
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61
BUG CHECKING
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62
ENGINE THREE VIEW DRAWINGS
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63～64
EXPLODED VIEWS
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65
COMMITMENT
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66
BOM LIST
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67～69
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SAFETY INSTRUCTIONS AND WARNINGS
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.
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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
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INTRODUCTION
engine structure and components
Throttle
rocker arm
Engine Hood
Cylinder Cap
Main body of engine
Start belt
Flywheel
Flywheel Nut
Timing belt Timing
Exhaust pipe
EG start
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Idle mixtur
Fan blade
Synchronous
pulley
Cooling fan
drive wheel
Needle valve
Water outlet
Water inlet
Crankcase
bottom shell
Oil drain2
Oil drain1
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Distribution diagram of parts packaging
04 05 06 07 08
09
10 11 12 13
16
14
15
17 18
03
02
01
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30
22
26 27
21
31
23
24
25
32
28
29
33
34
19
20
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62
63
36
60 61
62
44 M2x7
65
66
67
69
M2.5x6
68
71
72
M2x6
73
75
70
74
63
64
78 79
76 M3x10
36
36
77
66 M2x6
spare parts
44 71
54
80
84
52
85
77
M3x8
81
82 83
86
87
40 41
98
36
M2.5x6
37
M3x14
38
M3x14
40
43
M2.5x10
41
44
M2x7
39
42
45
51
52
53
54
36
46
48
56
49
47
57
50
55
M2.5x6
M2x5
58
59
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88
90
91
89
92
93
94
95
96
97
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95
93
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35
93
35
ASSEMBLY OF COMPENTS
#35 Piston ring and Cylinder liner have been
paired one by one,After removed, they shall
be installed in corresponding cylinder liner.
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Attention!
When disassembling, the
original pairing should be
kept and should not be
confused,During installation,
the concave points at the
arrow should also be kept
corresponding.
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Other 3 Pistion install in same way
#22 UCTOOLS
22
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94 80
36
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81
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78
79
79
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91
Attention:
The dark side
faces outward
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78
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83
82
90
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02
92
77
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87
86
66
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72 75 68
73
Pay attention to the direction:
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67
31
#69 is a black oil seal,#70 is a metal
bearing, please be careful to distinguish.
71 69
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36 74
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66
32
70
Effect picture
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21
96
52
34
# 34 is screw glue with
fastening and sealing function
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01
The gasket is
disposable and
equipped with
two spare pieces
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38
37
4.5mm
38
5.6mm
37
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42
#23 UCTOOLS
23
17
42 06 41 39
08
41
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06
42
85
34
# 34 is screw glue with
fastening and sealing function
41
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38
40
19
26
19
40
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拓陽精密科技
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54
12
54
51
34
28
53
50
13
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拓陽精密科技
36
10
05
52
11
07
49
48
04
98
05
04
55
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拓陽精密科技
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47
46
47
46
47
43
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拓陽精密科技
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拓陽精密科技
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44
16
45
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拓陽精密科技
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09
61
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拓陽精密科技
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15
63
62
36 63
65
24
44
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Move left and right here to
adjust the tightness of the belt
A
B
When installing the belt, please
make sure that A and B are
both center down at the same time
88
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拓陽精密科技
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57
29
36
59
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25
58
56
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84
30
77
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89 97
18
36
52
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36
14
03
If you want to operation, please add
grease to the CAM before covering
the cover to avoid dry friction.
33
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54
51
34
The nozzles can discharge waste oil and
also connect the tubing to measure the oil quantity.
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20
76
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INSTALL THE BASE
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 recom-
mended when fixed engine. If installed on other engine platforms, please purchase
adjustment pads to fit between the engine bracket and the engine.
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 Glow plug
The series of FS-L400Wx requires 4 special glow plug for a 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.
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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 20-25% 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 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).
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
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4.Start power supply
The series FS-L400Wx 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 and CAM axle box
Please make sure that the marking points on the two pulley can be down at the same time,see P43.
Open the hood and add the grease. Since the mounted CAM is used, please add the solid grease to ensure
stable operation and avoid dry friction of the CAM.
2. Check the power supply
Please confirm that the voltage of 7.4v universal ignition power supply is normal, and full
of electricity
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
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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.
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, resulting in ignition difficulty. Therefore, it is necessary to up the speed
for cleaning oil at intervals to avoid oil enrichment at low speed
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Since a four-stroke engine requires a lot of air intake, it is important to set throttle
screws , the minimum throttle opening (idling setting) is about 1.5mm.,For the use of
all kinds of engine enthusiasts. do not use a strong force to twist the throttle valve
screws to adjust the size of the throttle door opening, but using valve screws to loose
throttle, and then pull the throttle rocker arm to adjust. As shown in figure
Loosen the throttle
screw and adjust the
size of the throttle
4. Start
Remind!
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.
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.)
1.5mm
Please keep the throttle
opening larger than 1.5mm
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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
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.
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CARE AND MAINTENANCE
The series of FS-L400W 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
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
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 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
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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 lubricant for each operation
Note!
These maintenance programs will be stored after a period of time, and there is a risk of
corrosion or startup difficulties, if you need someone to deal with, please contact us
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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BUG CHECKING
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
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Three views
FS-L400W Specification
·Displacement: 3.5cc×4
·Bore: 16.60mm
·Stroke: 17.00mm
·Practical rpm: 3200-13500rpm
·Output: 3.05ps(30%Nitro)
·Weight: 1.2kg
44.00
114.85
90.80
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Multiple view
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Explosion view
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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
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BOM List
NO.
Name
PC
NO.
Name
PC
NO.
Name
PC
01
Cylinder head gasket
3
16
Throttle synchronizer
1
31
gear cover
1
02
Bottom gasket of casing
1
17
Camshaft
1
32
Axis positioning block
1
03
CAM frame cover gasket
1
18
Ten -tooth adapter
1
33
Grease
1
04
Needle valve
4
19
Rocker arm
4
34
Thread locker
1
05
Idle mixture
4
20
Engine bracket
4
35
Piston ring
1
06
Bearing
2
21
Valve cover
8
36
Screw (M2.5X6)
30
07
Bellows seal tube
4
22
Piston ring cover
1
37
Screw (M3X14)
10
08
Timing belt
1
23
5.1 aluminium cover
1
38
Screw (M3X14)
8
09
Mini belt roller
1
24
Mini belt roller
1
39
Round pin (φ2X12)
1
10
Throttle rocker arm
4
25
Exhaust pipe
1
40
Jump spring（φ2.5）
8
11
Wind post
4
26
Wind post
4
41
Jump spring（φ3.5）
3
12
Needle valve base
4
27
Connecting rod component
4
42
Camshaft oil seal
2
13
Injection Nozzle
4
28
Carburetor components
4
43
Screw (M2.5X10)
8
14
Engine hood
1
29
Exhaust siphunculus
4
44
Screw (M2X7)
14
15
Belt fastener
1
30
Motor bracket
1
45
Nut(M2)
4
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NO.
Name
PC
NO.
Name
PC
NO.
Name
PC
46
Carburetor gasket
8
62
Fan main bearing block
1
78
round pin（φ2X5）
1
47
Carburetor gasket (paper)
12
63
Bearing
4
79
round pin（φ2X6）
1
48
Grease
1
64
Pinch roller bearing base
1
80
O ring(φ26)
1
49
Spring(φ3.8)
4
65
Fan blade
7
81
Flat gasket
1
50
Nut(M4)
4
66
Screw (M2X6)
7
82
Gasket
1
51
Lubricating nipple
9
67
Gear shaft
1
83
Nut(M6)
1
52
Screw (M3X4)
10
68
round pin（φ2.5X7）
1
84
Motor bracket gasket
1
53
Flat gasket(φ8)
4
69
Y type oil seal
1
85
Screw (M4X5)
1
54
Flat gasket(φ6)
13
70
Bearing
1
86
Oil foot cover
1
55
Spring(φ7)
4
71
O ring(φ3)
1
87
Oil ruler cap gasket
1
56
Screw (M2X5)
4
72
Water-cooled gear 1
1
88
Synchronous belt（102）
1
57
Exhaust pipe gasket
4
73
Water-cooled gear 2
1
89
Synchronous belt（90）
1
58
O ring(φ4)
4
74
Gear cover gasket
1
90
Flywheel
1
59
O ring(φ7)
4
75
Gear gasket
1
91
Start belt pulley component
1
60
Screw (M4X25)
1
76
Screw (M3X10)
4
92
Bottom of the casing
1
61
Screw (M4X16)
1
77
Screw (M3X8)
8
93
Cylinder block
1
TOYAN
拓陽精密科技
68
NO.
Name
PC
NO.
Name
PC
NO.
Name
PC
94
Bearing side cover
component
1
95
Crankshaft component
1
96
Cylinder cap component
1
97
EG start
1
98
O ring(φ1.8)
4
