A car is one of the most important transportation tools in our daily life. As we all know, car engines play a significant role in powering the car so that people can do what was once only possible in myths and dreams. Model engines can also be a great tool for teaching children about cars while they're young. Model engine kits let children and adults alike build an engine and better know the working principle of the cars and engines. There are a few choices of fuel-powered model engines for teenagers, especially those from auto mechanic training schools, to choose from nowadays. Whether taking auto mechanic training classes to gain knowledge and skills, learn how to build engines from scratch, or show your kids how a car engine works, deciding what engine model to buy typically requires a great deal of thought and research.
Toyan has a passion for machining the highest precision and quality scale engine models. Toyan indeed has released a few engines in assembly DIY versions. However, we find some students can't afford it even though they do like Toyan engines but not the price. So we discuss this with the Toyan engine team. Why not make an engine that everyone can afford? We hope every petrolhead college student can take it even if they have a low budget. In this case, the idea of making an entry-level come into Toyan mechanics' minds for a year. So they have started to design and make it several times. And they have also co-branded with SEMTO Engine & OTTO MOTOR to make brand-new 2-cylinder 4-stroke engine kits recently. That means the costs are greatly marked down. so that is, OTTO MOTOR FS-L200AC ( or SEMTO ENGINE ST-NF2)- Simple, Easy To Use, and Intuitive. Just only 149.99$ and take this pocket-size engine home. (Please note that this is the entry-Level engine so the structure is simplified but it's fully functional. the size is smaller too)
TOYAN Mini AC Single-cylinder Engine
Some car-loving teens spend time learning more about engines now. so it would be perfect if they can get a mini 4 stroke engine, not to say an assembly kit version. This Toyan engine series give high school students a glimpse into the acknowledgment of the function of the car engine while they go into the automotive technicians' training. Toyan will make two brand new affordable engine models, single cylinder and twin cylinder, that are perfect for students. Trust me. These are the most legendary Toyan engines ever for kids.
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 OTTO technician to solve them. If return to the factory for testing, OTTO will provide you with high-quality after-sales service. If any problem caused by unauthorized disassembly, you will bear the corresponding responsibilities and expenses.
Glow plug
Model FS-L200AC-OT requires 2 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.
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
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
Start power supply
The series FS-L200AC-OT 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 Environment for starting
Please start the engine in an open, airy environment to avoid discomfort from burning gases
Platform for Starting
Since the engine will produce some vibration after starting, please place it on a stable and flat platform
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
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
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.
Check the power supply
Please confirm that the voltage of 7.4v universal ignition power supply is normal, and full of electricity
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. You can also buy the OTTO 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
Please keep the throttle opening larger than 1.5mm Loosen the throttle screw and adjust the size of the throttle
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.) 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 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 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.
CARE AND MAINTENANCE
The series of FS-L200AC-OT 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, OTTO 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:
The surface of the filament becomes rough and white
Filament curl deformation
External material adhered to the filament or plug corrosion
The engine will power off when idling
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 OTTO, 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
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 OTTO Motor 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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