Running in the two-stroke engine of a grass trimmer for grass (lawnmower)
The use of gasoline-driven mowers is necessary for mowing lawn and garden areas or outdoor spaces. During use, the lawnmower, and in particular its mechanical components, is subjected to great stress from internal and external factors. To ensure that the tool works at maximum efficiency right from the start and for a long time without breaking down, it is necessary to run in the petrol brushcutter before it is used. This is done in stationary conditions by a trained specialist or the owner of the product himself, because in the process there are no complex operations. The main thing is to know how to properly run in the gasoline-powered tool, so as not to cause errors. With this question, you can also turn to professionals who sell you a new, not running-in, scythe, or perform overhauls on the replacement of drive units.
Explaining whether your lawnmower needs a running-in, we will highlight the advantages of such an event:
- New tool is lubricated evenly;
- All parts are lapped;
- The product goes gently into operating mode;
- A comfortable examination of the tool is made in case there is a need to regulate the interaction of mechanisms to stabilize the work processes.
The last point also allows you to check the quality of the engine during running-in after the overhaul, when a smooth start-up also takes place. in a similar way also perform running-in after the parts for brushcutter in the engine, gearbox and other mechanisms have been changed.
Inspection and lubrication of lawnmower gearbox
Checking the gearbox before starting the gasoline grass trimmer should be performed on a regular basis. Lack of lubrication or a small amount of it increases friction in the gear reducer gearing operating at a fairly high RPM. The result is overheating of the gears as well. Gearbox in the brushcutter fails. This can be prevented by regular inspections of the boom, which is very important to keep from breaking down.
If you notice before starting the lawn mower that there is little or no lubricant in the housing, use LITOL. To do this, you need to unscrew the screw on the bend of the gear housing and pour “LITOL” in an amount of 1-2 ml.
When working with a gasoline trimmer for a long time, every 8-10 hours add grease to the boom gearbox.
Fuel mix components and mix ratios
Add 20 ml STIHL brand oil (for 2-stroke engines) per liter of AI 95 gasoline. Such composition passes the carburetor channels, lubricates rubbing parts of the cylinder-piston group (CPG), burns in the working chamber and settles on the walls of the muffler with stable predictable consequences. What is the reason for the warranty (1 year) and operating time (5 years) stated by the manufacturer.
The manufacturer guarantees that the gasoline grasshopper will work properly also with oils from other manufacturers, but in the ratio of 1:25 (40 ml per 1 liter of fuel). But you can hardly save money here. The illusory benefit of daily work (2-3 hours) is offset by the very real cost of annual cleaning of the carburetor and muffler. Obligatory, in this case, repair of the cylinder head (before the expiration of the declared service life), and at all makes the continuous use of low-quality fuel and lubricants unprofitable.
Break-in period for engine and gearbox
The mating moving parts are lapped within a limited speed range (from idling to ½ of the maximum speed). With 15-minute breaks every 20-30 minutes of work (for cooling and refueling) it will take 3-4 hours.
Do not run the engine (even after a long period of storage) without running in. Because the excessively rapid change in temperature to which the power grasshopper is subjected prevents proper polishing of the piston ring faces and the cylinder walls; microcracks appear in the housing castings. In addition, the noise of the loaded drive can overlap and the grinding of dry gear gears and howling of the bearings that are jammed.
How to run in parts?
The described method of starting is quite suitable even for Chinese technology. But sometimes it is impossible to start from the first time, or the grass trimmer stops immediately. In this case, the same manipulation is performed when closing the air duct valve. If then nothing works, you need to contact a professional. If the system works correctly, never start the unit immediately.
READ Lawnmower Oil Change Kit
First, the engine should idle for 5 minutes. Important: If the instructions state a different time, you must follow his instructions. The air supply must be adjusted during the warm-up phase. By setting different positions for the air damper lever, they ensure that the cutting unit does not move. After waiting for warm-up, fully open the choke and set the power to 50% of maximum.
In this position the lever is held for 20. 30 seconds. After lowering the throttle to the minimum, let the braid run for 30-40 seconds. Then they set the power to 20% and wait 10-15 minutes. Then turn off the engine and let it idle for ¼ hour. When the grass trimmer cools down, the engine starts as already described, but first the flap opens.
You should avoid holding the gas for long periods of time, as poorly treated parts can be damaged. Prolonged idling is also contraindicated. This will cause overheating. This completes the engine, after which you need to start the transmission. This procedure is performed in an open area where soft, fresh grass is growing. It is mowed at 5. 10 minutes without interruption, periodically treating with 50-75% gas.
After such a session, mowing stops for 20 or 25 minutes. Usually 3 to 4 cycles are enough to keep the grass trimmer working properly for many years. Most often they try to start the machine before the first filling is complete.
See the features of the hedge trimmer in the following video.
Getting the hedge trimmer started right the first time is a very important step when starting a new tool. On the one hand, they allow you to save the motor life of the gasoline engine, laid down by the manufacturer, because at this stage there is a crushing of moving units and parts. On the other hand, the first necessary skills for working with a trimmer are acquired when we talk about the first tool in my life.
- Preparing for the first start of the hedge trimmer
- Inspecting and lubricating the gearbox
- Preparing the right fuel mixture
- First Trigger
- Getting started on gasoline brushes
Preparing the right fuel mixture
Before you start running in a new lawnmower engine, you also need to properly prepare the fuel mixture. As you know, for two-stroke engines, it is made of special two-stroke oil and gasoline, taken in certain ratios. You can find out the proportions from the instruction manual that came with the tool, or on the label of the lubricant. You can get the recommended type of fuel, as well as the recommended type of engine oil from the manual.
Prepare fuel in small quantities, enough for one cut of grass. Use special canisters made of plastic or separate glass or metal containers for fuel. It is best to draw oil with a medical syringe.
When getting ready to test drive a new lawnmower many people have a problem with the fuel mix. And that is why there is a discrepancy between the tool manufacturer’s manual and the engine oil manufacturer’s manual. The former recommends a ratio of 1:25. The latter recommend 1:50. Who can be trusted?? How to proceed?
According to the specialists’ opinion, if the manufacturers write the ratio 1:25 or 1:30 in the instructions to the brushcutter, it’s most likely a cheap tool with poor cooling, or the manufacturer doesn’t know what kind of oil the user will add. But here it is necessary to understand that too much lubricant does not affect the performance of the grass trimmer in the best way. Excess oil does not burn out completely when the engine is running. It corks and clogs the cylinder and piston.
What to do in this situation at running in of a new tool? The ideal is to buy the oil that the mower manufacturer recommends. In the case of running-in engines, when there is no possibility to buy the recommended oil, it is better to buy a good Husqvarna two-stroke oil for the same-name gasoline tool. It is not cheap, but it lasts a long time. You have to mix it in the way, which is written in the instruction on the jar.
Remember, it is best to use the proportion given by the oil manufacturer. But it’s better to find out by experimenting, if the proportion is correct, what is written on the trimmer. If, at the proportion recommended by the grass trimmer manufacturer, the engine is dripping with oil and showing drips, you need to increase the proportion.
Do you need a running-in test for your brushcutter? Gasoline trimmer running-in instructions.
Before you start using any imported gasoline grass trimmer, you need to run it in first. It is necessary, on the one hand, to prolong the service life of the gasoline engine. During the break-in phase, the moving parts must first run in to each other, i.e.к. there is more friction resistance in the drive train. On the other hand, it is during the running-in period that you can acquire the necessary skills for working with a petrol trimmer. This is especially important for first-time users of gasoline-powered trimmers.
The receiver channel can then be used in other ways, for example, to switch banks. If the receiver signal is lost for 1 second or longer, the stored values are used. Real-time debugging. By assigning a parameter, you can directly make adjustments with the transmitter. The selected parameter can be conveniently set on the basis of the channel offset with the control. Configuration is therefore not required to connect to the configuration software, but a normal transmitter is sufficient.
Changing the channel deviation immediately changes the value of. The maximum deviation of the selected channel sets the maximum possible value of the parameter, the minimum deviation. lowest value. Real time parameter setting has the highest priority. This means that the value set in the profile or in the banks is not used.
Only use brand-name oils when preparing the fuel mixture with the gasoline trimmer. The grades of oil that can be used to prepare the fuel mixture are listed in the instruction manual. Strictly observe the correct proportions of oil and gasoline. the octane rating of the used gasoline must be at least 90 (except when it is specified in the instruction manual) in our country not less than 95, otherwise the life span of the chain saw or the grass trimmer is sharply reduced, the operation of the saw/grass trimmer is accompanied by overheating, unstable operation.
This function is active if the configuration program does not work to prevent conflicts. When the program is disabled, the value of the selected parameter is set based on the channel deflection. If the program is reloaded, the value last set by the channel deflection is displayed. However, when the program is running, the previous rules apply.
You can set up to 3 different parameters or functions at the same time. If the function is set, it is active when the value is equal to the vibration analysis. This function is additionally described in the chapter “Diagnostics”. After setting the parameter, it is recommended to install the program, save the settings in the memory of the drive and disable the parameter setting.
Carefully read the manual, those sections concerning hot and cold starts. The engine starting principle is the same for all petrol-powered trimmers. Only the position of the saw controls (STOP button, air damper lever) may be different.
A running-in period of 3 to 4 hours (cumulative operating time) is required. Do not run the chain saw/trimmer idle for a long time during the running-in period. Allowed to work idle for no more than 15-20 minutes with periodic ignition of the engine at intervals of 20-30 seconds. Then the robot should be continued in operating mode with a light load. This includes mowing “soft grass” with minimum effort by the operator.
We recommend that you always make the adjustments with extreme care so that you do not lose control of your model! If the settings on the previous tab have been made, you should make small adjustments to the transmitter configuration accordingly. Each transmitter is different, and the central impulses of all channels never coincide. Even with increasing wear and tear or the effects of outside influences, these centers may move slightly. Another factor is the maximum and minimum value of each channel.
There can also be a large deviation. For the unit to work properly, move the lever to copy the movement of the pointers! Also check the percentages for the aileron channel, collective elevator and rudder. These channels must be in the neutral position of the knobs at about 0%! The unit automatically detects the neutral position every time it starts.
We hope that the power tool you have purchased will give you many years of service and that you will enjoy using it.
Similarly in a “nutshell” (Use the manufacturer’s manual to run your model)
Read the instruction manual. (Read carefully) 1. Gasoline 1:25. In 2.5 liters of AI-95 (highly recommended) add 100gr. 2-stroke oil, preferably Husqvarna or STIHL (red). The fuel tank should preferably be plastic or aluminum, t.к. There is rust in the regular canisters, which over time can accumulate in the carburetor and lead to failure (clogging). 2. Check and, if necessary, add special grease to the lower gearbox. 3. Start (according to the manual). Let work at idle for 5 minutes, then at intervals of 20-30 seconds ngazovka on 1/2. 2/3 gas (half gas). Do not accelerate sharply or for a long time at the beginning of the test! Continue 10-15 minutes. Attention! In the instruction “winding up” is painted for ambient temperature 10 20. When it is hot 25 30 after the first “rrrrrrr” I recommend to switch air valve of gasoline tool to the working mode, “squeeze” the gas button and when you start gas up 4. Take a break for 15-20 minutes. 5. Start (as directed or as shown in the instructions).above). Let it run at idle for 5 minutes, then at intervals of 20-30 seconds accelerate to 1/2. 2/3 of gas (half throttle). Do not accelerate sharply and for a long time at the beginning of the test run! Continue for 10-15 minutes. 6. 15-20 min break. 7. Running-in of the lower gearbox. Mowing “soft grass” for 5 minutes at 5-10 minute intervals. Repeat 3 to 4 times. 8. Gasoline grass trimmer ready to go. 9. Check and need to add lubricant to the lower gearbox, add periodically (1 every 1-3 hours). 9. Run-in with up to 3-4 hours total run-in.
Ideally, all subtrims and weed trimmers should be reset before the unit is connected. Among other things, it is also recommended to compare the minimum and maximum deviations. Check the channel deflection levers. If not diagnosed at approximately 100%, respectively. 100%, you need to call it a distinction, using the dual rate function or adjusting the stroke for both directions.
STIHL FS 55 gasoline grass trimmer/ lawnmower. Model advantages
- Ergonomic two-handed handle in silver color. Fits comfortably in your hand, does not slip out while working.
- The motor control mechanism is built into the handle. This is made to enhance the safe usage.
You can use the “Freeze Frame” button to compare the chart with the previous status. The currently displayed chart is saved and will be displayed without changes. This chart can be deleted at any time with the “Delete” button. Perfectly record each vibration chart, which allows a button on the image that will permanently save the chart to disk.
- Interchangeable cutting equipment enhances tool functionality. The STIHL FS 55 gasoline trimmer/Benzokoce comes with a disc for hard and overgrown grass, a disc for trimming brush.
- Eye protection goggles. Gives direct and side protection, blows on the inside, does not create a greenhouse effect of the windows, provides a good panoramic view.
- STIHL shoulder strap. Comfortable use of the trimmer increases productivity, reduces energy loss, distributes the load evenly and does not put pressure on the shoulder. Keeps hands free for productive mowing and secures the mower during operation.
To locate the vibrating parts, you first need to determine the speeds of the highest peaks. The most common reason is that the main rotor has the lowest speed, the balancing rotor is about 5 times higher, and the motor is even higher. The smaller the size of the helicopter, the higher the speed.
If we want to find out which part of the helicopter is which, all we have to do is point the cursor to that peak in the diagram and determine the speed. So if the tip is in that range, it’s probably a problem with the main wheel, the shaft, or the rotor head itself.
- High-pressure tank made of translucent material that allows the operator to check fuel level at a glance.
- Fuel consumption is monitored by the fuel system. Thanks to it, the grass trimmer consumes fuel economically and produces a small exhaust.
- Easy trimmer operation. No special knowledge or experience is required to operate the tool. The user can easily understand the buttons on the handle, marked with common symbols.
- Lack of electric drive. The chain saw works anywhere in a large area without connection to the mains.
Test drive of the STIHL FS 55 petrol grass trimmer / ride-on lawnmower. Instructions for users
On models, excessive vibration emanating from the propeller is most often seen on models. Once we identify a part of the helicopter, we gradually remove the parts and repeat the measurement process each time the vibration disappears. No need to touch the rest of the model when it disappears.
If we measure with flywheels, there is more risk, but the vibration of the model will be measured more carefully. Often the vibration of the propeller deteriorates significantly after the blades are installed, and this is important to address. Models with a gasoline engine should not run without load! Vibration measurement is not possible without leaves.
The grass trimmer’s running-in period is necessary for its normal and long-lasting use. During the running-in period, the moving parts are lapped, the initial resistance in the drive mechanism is increased, and to reduce it, the parts are slightly “worn out”. The running-in process also gives the beginner the opportunity to learn how to operate the trimmer.
- Before you start, prepare a fuel mix of the recommended oil and gasoline grades listed in the data sheet. The proportions are approximately as follows: per 2.5 liters of AI.95 Add 100 g of STIHL oil in the red packaging. For mixing, buy a container made of plastic resistant to corrosive liquids or an aluminum tank. Usually a canister always has corroded micro-parts; rust builds up in the carburetor of the saw and leads to blockage and breakdown of the assembly.
In Flight. Measurement of vibrations during flight. This function allows you to record the vibration spectrum from any point during the flight. With the channel selected, you can specify when the recording is to be saved. Recordings will be stored in the unit’s memory until the power supply is disconnected. Recording is re-recorded.
Select this channel to activate the function. As soon as the function value 1 is saved, a vibration recording is recorded. The recording is created exactly when the function switches from 0 to. Thus, it is sufficient to switch the set control element of the transmitter during the flight. After landing, connect the unit to the program and play the recording in the window of the frequency analyzer.
- The cumulative running-in time is 3 to 4 hours. During this period, it is not recommended that the instrument be idle for more than 15 minutes. Requires constant starting for 20-30 seconds.
- It is possible to combine running-in and light-duty work, such as mowing non-rigid vegetation.
- Once every six months, you should bring your warranty tool to the service center for a carburetor inspection and tune-up.
This test tool is capable of determining whether or not the power supply onboard the model is adequate. The goal is to reach maximum current peaks and thus verify that the supply voltage drops below a safe level. Press “Start” to start the testing process. It takes 20 seconds. If you are experiencing any problems, it is very likely that the built-in power supply is insufficient. It should therefore be replaced by source with a higher current load.
Recording flight is used to control the events during the flight. If there is a situation where there is no known cause of the problem, it is advisable to check the flight record first. The flight recording works by recording all possible events from the onboard power supply. If this happens, it will appear in the record that every 10 seconds reports. Pressing the “View” button opens the current record which contains all the events since the power supply was connected. After the power is turned off, the recording is deleted.
Preparing the right fuel mixture
Before you start running in your new lawnmower engine, you also need to prepare the correct fuel mixture. As you know, for two-stroke engines it is made of special two-stroke oil and gasoline taken in certain ratios. You can find out the proportions from the instruction manual that came with the tool or on the label of the lubricant. You can also find the recommended fuel type and recommended engine oil type in the manual.
Prepare fuel in small quantities, enough for one grass cut. Use special canisters made of plastic for fuel, or separate glass or metal dishes. It is better to use a syringe to get the oil.
Getting ready to run in a new lawnmower, many people have a problem with the fuel mix. The reason for this is that there is a discrepancy between the tool manufacturer’s instructions and the engine oil manufacturer’s instructions. they recommend the ratio 1:25. The second ones recommend 1:50. Who to trust?? What to do?
According to experts, if the manufacturers write the ratio 1:25 or 1:30 in the instructions to the brushcutter, then most likely it is either a cheap tool with poor cooling, or the manufacturer does not know what oil the consumer will add. But here it should be understood that the excessive amount of lubricant is not the best way to affect the performance of the trimmer for grass. Excess oil does not burn out completely when the engine is running. It will cork and clog the cylinder and piston.
What to do in this situation when running in a new tool? It’s ideal to buy exactly the oil that the mower manufacturer recommends. In the case of running-in engines, when you cannot buy the recommended oil, it is better to buy a good Husqvarna two-stroke oil for the gasoline-powered machines of the same name. It is not cheap, but it lasts for a long time. It is necessary to mix it as it is written in the instruction on the jar.
The oil producer’s formula is the best to use, but remember that it is better to use the oil’s proportions. But it is better to find out by experiment if the recommended oil ratio is correct. If you can see that the engine is dripping with oil at the recommended oil ratio, you need to increase the oil ratio.
How to start a brushcutter correctly
The peculiarity of any technique with a two-stroke engine is a rigid algorithm of the cold start, which should be strictly observed.Good day dear subscribers and guests of the channel.
The other day a man came to me with a request to see his mower.
The complaint was that the tool would not start. The customer said that he bought the mower quite recently, it had only worked once. Trying to start the brushcutter a second time was unsuccessful.
These leakages show that the mower is overfueled, but the user of it hardly ever worked, and as I later found out from the customer, they appeared during a futile startup.
Now everything is falling into place. This lawn mower is perfectly serviceable, but it would be good for the customer to read the manual, especially the section describing the “cold start” procedure.
How to start a brushcutter correctly
A feature of any machine with a two-stroke engine is a rigid algorithm for cold starting that should be strictly observed.Good afternoon dear subscribers and guests.
The other day I was approached by a man who wanted to see his mower.
The complaint was that the tool would not start. The customer said that he had just bought the mower and it had only worked once. Attempting to start the brushcutter a second time was unsuccessful.
Such leakage indicates that the mower is overfilling, but the user has not worked it much, and as I found out later from the customer, it appeared during the start without any results.
Now everything is back to normal. this lawnmower is fully functional, but it would be good for the customer to read the instruction manual, especially the section describing the “cold start” process.
The result of a proper running-in of a gasoline grass trimmer
After you have run the lawnmower according to the instructions, the result will be a tool that is ready to work. Of course, it is best not only to read the steps, but also to see the running in on a video from the experts. The result of doing the right thing will be:
- the gasoline tool has been working without any problems for a long time;
- quality start-up of the device and stability of the supplied power;
- The absence of unforeseen repairs of the grass trimmer after a quality run-in;
- no overheating.
In this regard, the initial processing of the Chinese grass trimmer is an essential part of the quality work of the device, which can work perfectly, using blades for chain saws or cutting lines of different diameters when processing areas, available for purchase at the special store “Grass Mower”.
How to run in parts?
The described method of starting is quite suitable even for Chinese technology. But sometimes it is impossible to start the first time or the grass trimmer stops immediately. In this case, similar manipulation is performed when closing the air duct valve. If then nothing works, you need to contact a specialist. If the system is working properly, never start the unit immediately.
First the engine should idle for 5 minutes. Important: if the instructions specify a different time, you must follow his instructions. The air supply must be adjusted during the warm-up phase. By setting different positions of the air damper lever, they ensure that the cutter does not move. After waiting for it to warm up, open the choke fully and set the power to 50% of maximum.
In this position, the lever is held for 20. 30 seconds. Lowering the throttle to the minimum, let the braid run for 30-40 seconds. Then they set the power to 20% and wait 10-15 minutes. Then turn off the engine and allow it to idle for ¼ hour. When the grass trimmer cools down, the engine starts as already described, but the choke opens first.
You should avoid holding the throttle for long periods of time, as poorly processed parts can be damaged. Prolonged idling is also contraindicated. This will cause it to overheat. This completes the engine, after which you need to start the transmission. This procedure should be carried out in an open area with soft, fresh grass. It is mowed for 5. 10 minutes without interruption, periodically treating with 50-75% gas.
After such a session, mowing stops for 20 or 25 minutes. Usually 3 to 4 cycles are enough to keep the grass trimmer working properly for many years. often than not, they try to start the device before the first refueling is complete.
See the features of the hedge trimmer in the following video.
Getting the hedge trimmer up and running correctly for the first time are very important steps when starting a new tool. On the one hand, they allow you to save the motor life of the gasoline engine, laid down by the manufacturer, because at this stage there is a crushing of moving units and parts. On the other hand, the first necessary skills for working with a trimmer are acquired when we talk about the first tool in my life.
- Preparing for the first hedge trimmer startup
- Inspecting and lubricating the gearbox
- Preparing the right fuel mixture
- First trigger
- Getting Started with the Gasoline Brushes
Start the lawnmower running-in
After starting, don’t rush immediately to run the grass trimmer. Let the engine idle for about 5 minutes. While the machine is warming up, adjust the airflow with the choke knob so that the line or the blade bobbin does not rotate. Once the tool is warmed up, open the air supply by moving the lever to the “ON” position and squeeze the throttle trigger 1/2way and hold for 20 30 seconds. Then we drop the gas and let the trimmer work for 30 minutes at idle.40 seconds. Continue in this mode for 1015 minutes. Then turn off the power and let it rest for 15 to 20 minutes.
After the lawnmower has cooled down, continue running in the engine according to the previous scheme. Start the hot grass trimmer with the air shutter open. Try not to hold the gas for long periods of time, as the moving parts of the tool are only lapping against each other. And do not let the engine idle for a long time as it may overheat.
The next step is the running-in of the gasoline grass mower gearbox. Choose an area with soft, young grass. Mow for 510 minutes with half to two-thirds of the full throttle. Afterwards we make a break for 2025 min. Repeat this cycle 34 times.
Generally starting up the lawnmower in accordance with described algorithm is made until fuel mixture in the tank is completely out. After that the tool is ready for continuous working. While working keep an eye on the temperature of the gearbox and motor. They should not overheat.
Store fuel in the gas tank for more than one week
If the prepared fuel mixture is stored for more than one week, the oil with additives loses its properties and does not provide high-quality lubrication of the piston. Stir only as much of the mixture as is necessary for the job. If there is any residual fuel in the tank, remove it. It is recommended that a medical syringe be used to draw out the fuel that has been prepared. It helps to keep the right dosage.
Note! If the mower and oil manufacturer specify different dosage for the same application, choose the minimum dosage.
Use fuel with additives
Many people use gasoline that has additives in it to work with a chain saw. In order for the device to work properly, you should choose fuel that has no additives. If not, it will have a negative effect on the oil seals. The parts will become soft and begin to let air particles in.
As a conclusion, we can point out another popular mistake that many users make. During the test run, the gas key must not be pressed hard because the needle will jam on the carburettor surface. Keep in mind that the throttle key also needs to be lapped for proper, long life, in particular, as does all mechanics. The gas button should be pressed smoothly and fully. As a result of such careful movements, the needle in the carburetor, like all mechanics will be lapped smoothly.