How To Store A Brushcutter
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Chainsaw and brushcutter. Start-up and maintenance of motor vehicles
Many of our compatriots, in order to facilitate their own work, came to the need to purchase motor vehicles. Since among domestic consumers the most popular are products such as brushcutters “brushcutter and chainsaw “chainsaw, and among them the products of the Husqvarna brand have proven themselves almost the best “Husqvarna, then we will take them as an example to illustrate recommendations for the correct use of this kind of technique. By observing the recommendations below for the use of motor vehicles, you can easily achieve a virtually lifelong service from it.
Running in chainsaws and brushcutters
Who would not say what, whatever the latest technologies in the manufacture of the instrument would not be applied, but the laws of physics have not been canceled. Therefore, before starting work, the engine must be run in. To do this, the engine must run at least one tank of fuel (no load!) With frequent changes in the speed (idle, maximum speed). The next 10 hours of operation in the mode of gentle (50%) load. In the case of running a chainsaw, it can be work, say, with small diameter wood, and in the case of a brushcutter. Work only with a fishing line (not a cutter).
Engine. Chainsaw. A precision instrument with a two-stroke internal combustion engine and all its parts need technical cleanliness and proper lubrication. The air filter of the chainsaw must always be clean (free of dirt and sawdust); the foam filter must be moistened with oil. The fuel filter must be checked once a week (replace if necessary). Checking the tightness of nuts and screws. Before starting work. Cleaning the muffler (or its mesh) and spark plugs from carbon deposits. Of necessity. Lubricate the bearing of the centrifugal mechanism (if necessary) once a week.
Chain. The cutting edges must be well and correctly sharpened using the correct templates and files, depending on the brand of chain. After several sharpenings, check the depth of cut height. The gap between the stop and the cutting edge should be 0.7 mm. Check the chain tension at all times. It should neither sag, nor be tightly tensioned: incorrect tension leads to overloading of the engine and intense wear (and even breaking) of the chain and bar.
Tire. The driven sprocket must be lubricated once a day (in winter, at every refueling). It is also necessary to clean the tire surface from dirt and turn it 180 degrees once a day (to ensure even wear). Also, at least once a week, it is necessary to remove burrs from the tire flat with a flat file to maintain the perpendicularity of the guide rails to the oil supply groove.
Chain lubrication. For these purposes, it is better to use a special Husqvarna oil, as a last resort, any clean machine oil. Under no circumstances should a “work off” or “spindle” (flushing oil) be used. Continuously monitor the operation of the oil pump. Even short-term operation of the machine without lubrication leads to accelerated wear of chains, sprockets / discs and tires.
Maintenance of brushcutters
Engine. The air filter must always be clean (free of dirt and sawdust); the foam filter must be moistened with oil. The fuel filter must be checked once a week (replace if necessary). Checking the tightness of nuts and screws. Before starting work. Cleaning the muffler (or its mesh) and spark plugs from carbon deposits. Of necessity.
Angle reducer. This part of the mechanism brushcutters it is necessary to clean daily from dirt (the “fur coat” of particles of cut grass and soil does not allow the gearbox to cool normally) and apply grease Husqvarna for a gear pair.
Lines and trimmer heads. Only use special mowing line. Do not use wire or metal ropes! Install only a line of the diameter recommended by the manufacturer. Wind tightly around the bobbin without crossing the turns. Motokosa needs to be cleaned of dirt from the mowing head and, if necessary, lubricated.
Cutting discs. The cutting parts must be well and correctly sharpened using the necessary templates and files, depending on the brand of the disc (cutter). Like gasoline engine, brushcutter needs to regularly turn the double-sided disc (cutter) 180 degrees for even wear. A blunt disc or a disc with poor or incorrect sharpening cuts poorly, and thereby overloads the engine, which leads to a rapid reduction in its service life.
Protective covers. Without protective cover brushcutter cannot be operated. This is prohibited for safety reasons. In addition, such work can overload the engine. Brushcutters. Only use its own protective guard for each type of cutting attachment.
Motokosa. How to work with her
A haircut. Hold the trimmer head directly off the ground at an angle. Only the end of the string does the work. Let the machine run at its own speed. Do not press the string against the mowed area. The brushcutter must be above the ground, otherwise you will severely overload the engine and mowing head. They may fail or melt!
Cutting. A brushcutter with a line (trimmer) is ideal for cutting thin grass that is difficult to reach with a conventional lawnmower. Keep the string parallel to the ground as you cut. Avoid pressing the trimmer head to the ground, as this can ruin the lawn and damage the tool.
Pruning with a knife (disc or cutter). Motokosa, especially with a reserve of power, it is very convenient for mowing grass for hay. This is best done with a special knife or disc (cutter). Mow grass in hay with pendulum movements from side to side, movement from right to left will be working, and from left to right. Will be refundable. The blade should cut the grass with its left edge (on the clock face. Between 8 and 12).
How to properly prepare a fuel mixture for a brushcutter or chainsaw
Remember! Motokosa and chainsaw needs special fuel. Gasoline oil. And nothing else.
Oil. High quality two-stroke Husqvarna oil for high-speed equipment (10-15 thousand rpm, about 200 rpm). In no case should you use motorcycle oils (low engine speed) or water vehicles (other cooling system). Their use does not provide the necessary lubrication of the piston group and parts of the entire engine!
Petrol. Any pure high-octane gasoline (with an octane number of 92 and above, with a density within 750.770 kg / m3). The purity of gasoline must be: mechanical. Defend and store gasoline for operation not in a metal container and no longer than 1 (one) month, otherwise it will oxidize and lose its properties; chemical. Impurities and additives should not be present (they have different speed, degree and combustion temperature). Old gasoline turns yellow and red, and impurities have pungent odors of bitterness (for example, creosote) or acid (for example, methyl alcohol).
Fuel ratio. 1:50 (2%) or 20 ml. Oil for 1 liter. Gasoline. For example, pour half a measure of gasoline into a transparent plastic bottle (1 liter), then use a medical syringe (20 ml.) Husqvarna oil and mix, add gasoline and mix thoroughly. If the quality of gasoline is questionable or the working conditions are difficult, then the amount of oil can be increased to 22-25 ml per liter. Gasoline. Shake the mixture before each refueling! Store the resulting fuel for no more than two weeks! If the color of the mixture has changed (from aquamarine color to brown, for example), then it is not recommended to use it!
Review of the best petrol cutters for home and summer cottages
Let’s start our review with petrol cutters Tatra Garden BCU-45. This is one of the lightest units in the line of this brand. Its weight is only 5 kg. This means that even women and older people can cope with it. Looking for a gift for your father? Or maybe your wife wants to have a reliable tool at hand to clean up the yard on her own? Then the Tatra Garden BCU-45 model is what you need!
There is no need to overpay for extra power when all you need to do with a petrol cutter is to cut short grass and weeds in your garden. The compact size of this brushcutter allows you to work with it directly near the house, around trees and on uneven areas.
This model is supplied with an impact-resistant mowing head, already loaded with a fishing line, designed for soft grass, and a three-blade knife for cutting weeds.
Additional convenience when working with this brushcutter is provided by the primer pre-priming pump located in the quick access zone. Due to the preliminary injection of fuel into the carburetor, the engine will start much faster and you will not need to pull the starter cable for a long time. One confident jerk and the device is ready to go!
The handle of this gasoline tool deserves special attention. It looks like a bicycle. It is convenient to grip and hold it, so your hands practically do not get tired.
The Tatra Garden BCU-45 petrol cutter is supplied already with a shoulder strap, which allows you to comfortably fix the tool and evenly distribute the load on the muscles. The basic configuration also comes with a protective shield to prevent injury to the operator, and a measuring tank, with which you can accurately mix gasoline and oil in the right proportion for filling the tank.
The next model with which we would like to introduce you is Tatra Garden BCU-55. It belongs to the middle class in terms of power and tasks performed. Its range of activities is rough grass, weeds such as quinoa, burdock and other thick-stemmed plants. Due to the increased motor resource, this model can be used for harvesting small amounts of hay, for example, for feeding rabbits and goats.
An important feature of this gas cutter is a collapsible gearbox, which allows you to change the working attachments, turning the tool from a scythe into a cultivator, brush cutter or even a boat motor. All these attachments are presented in the catalog of the Tatra Garden company. You can collect all of them and get a lot of useful tools connected to one engine. Replaceable attachments are easy to change, easy to store and transport.
A mowing head with a line, as well as a three-blade knife, is included as a cutting attachment in the basic configuration for this scythe. The choice allows you to rationally use the device in areas with different types of vegetation, depending on its rigidity.
A shoulder strap and a measuring tank for gasoline / oil mixture are already included in the kit. Everything for a quick start and comfortable operation!
The next model we will look at is Tatra Garden BCU-73. This is a real workhorse. Its capabilities will be appreciated by the villagers. And here’s why: this gas cutter is equipped with three cutting tools at once: a mowing head with a fishing line, a three-blade knife and a heavy-duty 40-tooth knife with a victorious soldering. Therefore, with the help of this petrol cutter, you can perform a lot of different tasks:
- Prepare large amounts of hay for cattle;
- Cut corn for animal feed;
- Mow weeds in the garden;
- Tidy up the backyard territory;
- Mow reeds near reservoirs;
- Cut off small shrubs and young growth of trees;
- Clear the undergrowth from the deciduous forest.
And finally, the last model for today that I would like to introduce you to is Tatra Garden BCU-310. This brushcutter has a 4-stroke engine. The improved internal mechanism of the engine allows for more efficient use of the fuel mixture, providing lower levels of harmful emissions into the atmosphere.
This petrol brush is the best choice for owners of urban private farms. With the help of this unit, you can not only trim the lawn, but also update the complex pattern of landscape design elements. The BCU-310 is also suitable for cutting hedges.
Keeping up with the latest technical innovations? Choose the BCU-310 model with increased efficiency and environmental friendliness!
How to choose a brushcutter (gasoline cutter) for your tasks?
In our review, an expert tells how to choose a brushcutter based on specific tasks.
Why Tatra Garden?
And now a few words about why Tatra Garden is worth choosing.
The motor in all petrol cutters of this brand has increased wear resistance. This was achieved through a special protective coating on the walls of the engine cylinder. Two compression rings provide efficient heat dissipation to ensure long service life.
The starter in gas powered tools has 4 hooks, which, in comparison with mechanisms with 2 hooks, provides it with 8 times longer motor life.
The surface of the rod is chrome-plated. This gives reliable protection against corrosion.
Convenient primer for priming fuel will allow you to start the tool even in wet weather and even with gloves.
All fasteners in the device are made using the proprietary Vibresist technology. They are not loosened or weakened by vibration.
The spark plug and air filter are easily accessible without any tools. Thanks to this, maintenance procedures can be performed independently, even in the countryside.
For the safety of the operator, all models of the brushcutter are provided with a protective cover over the cutting tool and a lock against accidental activation located on the handle.
What engines does Hyundai use for its brushcutters?
The Hyundai company differs from competitors in that it creates its own gasoline engines, and not standard and of the same type, but very, very diverse. There are some for generators, for snow blowers they are completely different, winter ones, for cultivators and motoblocks there are still others. Each group of Hyundai Genuine Engines owns its own design features and is ideal for the exact tool for which it is designed. So it is with brushcutters.
Engines for Hyundai brushcutters are two-stroke, run on a mixture of gasoline and oil.
- The cylinder is covered with nikasil, which improves heat transfer;
- Compression at start-up reduced easy start system;
- The Japanese sintered metal gearbox is almost always work, as well as noise and vibration reduction. This is a powerful argument for those who dislike the howling and shaking instrument. In addition to the gearbox, there is also a whole system for reducing vibrations, so that these braids do not shake with the hands, there will be no pain in the hands and joints;
- They are easy to start and operate at low temperatures, they are not afraid of moisture and tall grass.
Why is a noisy and heavy gasoline scythe better than a light electric one?
The brushcutter consists of a gasoline engine, cutting equipment, controls and a transmission shaft. This whole structure has long been thought over, analyzed, improved and perfectly balanced. For ease of use, the tool (relatively heavy in weight) is equipped with shoulder straps or a convenient backpack attachment. That is, the weight of the device lies evenly on the arms, shoulders and back, and you don’t feel fatigue in your hands.
The electric trimmer has a similar design. Over, it is lighter and more convenient to work with. So for mowing a small lawn near the house, a small adjoining lawn, caring for the garden adjacent to the house, it is better not to find a tool. However, please note which terms we use: small, close. That is, there are two conditions:
- The plot should be small (up to 5 acres);
- Placed near the house, that is, an electrical outlet.
If your mowing tasks do not meet these two criteria, then the choice of a brushcutter is tipped in favor of a gasoline engine. Is he:
- Works anywhere, anywhere and anytime, since it is not tied to the electrical network;
- The size of the plot is practically unlimited (except for the power of the motor, the more powerful, the more area you can take for mowing);
- Power and performance are always higher than that of an electric trimmer. This means that the quality of cutting will be better, and the efficiency is the same for soft grass, and for hard weeds, for tall thickets;
- The previous item brings with it the next opportunity to change the equipment. Not only a wire line, but also a three-pronged knife or even a multi-pronged disc for cutting and sawing hard growth;
- Increased resource, reliability and the ability to withstand heavy loads. This is a property of a gasoline engine. Electric cannot boast of such characteristics;
- Well, let’s not forget about the structural elements. The steel rigid transmission shaft (with high efficiency), the most comfortable bicycle handles are all the prerogative of gasoline braids. Their electric sisters have a flexible shaft (with a cable that bursts under load) and a D-shaped handle (for one-handed grip). But there are models that completely copy brushcutters. With direct drive, gearbox and steel shaft.
In fact, these are the main criteria when you are dealing with the question: How to choose a brushcutter? Yes, one that mows, and does not stand idle in the barn.
Model range which brushcutter and where is it more practical to use
Before choosing a brushcutter among the many petrol models from Hyundai, first determine:
- Land area;
- Vegetation on it.
Soft and juicy grass on a flat lawn does not require a knife, only fishing line. For this, the Z 250 braid is presented in the model range from Hyundai. It is slightly different from other Hyundai braids with a gasoline engine. Its design is more like an electric scythe. Its shaft is flexible and the handle has a D-shaped grip. In fact, it is a lightweight petrol trimmer. Mows only with wire (line). If you put the knife down, the cable will not support the load. But for turf, this model is ideal: easy to mow, carry and store.
All other Hyundai braids have steel shafts, which allows you to use any attachments for mowing: a knife or a disc. And this means that we not only cut the grass, but also chop weeds, cut undergrowth of bushes and even thin tree trunks.
With regard to the size of the site, the situation is as follows:
The larger the area, the higher the engine power should be. For example, the lightweight and comfortable brushcutters Z 250 and Z 260 are good for small areas, they have power. 1.2 h.P. They will not pull a large meadow for 20-30 acres, for this, choose the models Z 420, Z 525, they have a power of 1.6 hp. And even 2.04 hp. The most powerful.
So, focusing on the area and vegetation:
- If the task is to mow only lawn grass (including high and wet), and a lawn for 5-10 acres, then your choice. Models Z 250 and Z 260;
- If you need to mow everything in a row on a plot of 10 acres (weeds, unnecessary shrubs and young shoots of trees that have grown without permission), then choose among the powerful brushcutters Z 340, Z 420;
- For professional work on large areas (20-30 acres), where you need to work with vegetation of different hardness and rigidity, focus on the most powerful representatives of the Hyundai lineup. Z 420 and Z 525.
How to choose a brushcutter
The petrol scythe, which makes a pretty decent noise and buzz, and also emits a cloud of acrid gray smoke, is the one with a petrol engine. For the uninitiated, a reasonable question arises: Why complicate your life? Wouldn’t it be better to use a quiet electric trimmer and not take on the hassle of a petrol engine? Over, Hyundai is a very popular manufacturer of garden tools in Ukraine, it produces both braids. Both with an electric motor and a gasoline one. At the same time, electric trimmers are cheaper and do not require refueling.
The answer is simple. A gasoline engine, even noisy and very demanding, always has undeniable advantages over an electric one.
So, you have already realized that the adage Much Ado About Nothing. It’s not about Hyundai brushcutters. The louder they are, the heavier the weight, the higher the mowing performance. As well as quality and efficiency, reliability and durability. And also a unique opportunity to mow grass not only on the house lawn, but also on vast territories, in the forest, in the field in general, in any place where there is a need and opportunity to prepare grass mass.
To select the required brushcutter, we determine the size of the site (for a small one, low-power models, for a large one, it is more powerful). We also look at the growth: for grass, a light gasoline trimmer with a fishing line is enough, and for weeds and tough vegetation, we choose the Hyundai model with a steel shaft, in which you can change the fishing line to a knife.
How to choose a brushcutter
Motokosa or a gasoline trimmer is a convenient, mobile, practical and therefore very popular tool with which you can mow grass, stiff shoots, thickets of small bushes in your summer cottage, near your house, in the garden before harvesting potatoes. Recent times brushcutters became very popular in agriculture for harvesting hay. However, a large selection of models with different technical indicators and a wide range of prices raise a natural question for the consumer: which brushcutter to choose in terms of price-quality ratio, and so that its technical characteristics meet the tasks that will be performed as much as possible. In this article, we will try to tell you what brushcutters are, for what types of work they are suitable, as well as the basic rules for operating a gasoline trimmer.
Types of brushcutters
Depending on the technical characteristics, as well as on the operating mode, all brushcutters can be conditionally divided into:
Professional brushcutter designed for industrial use, performing a large amount of work for a long time, and is perfect for use by utilities or in agriculture. Naturally, for this brushcutter must have not only high technical performance, but also the appropriate build quality. As a rule, professional models have engine power from 1.8 hp. And above, they are equipped with both a trimmer head with a line and a steel knife. Over, the thickness of the fishing line is greater than usual (from 2.4 mm), and the knife can be 3, 4 and 8 lozenges (the latter is used for mowing tall, weaving grass and for hay harvesting). There are also knives with a large number of teeth, they visually resemble saw blades and are used for mowing bushes. In addition, a distinctive feature of a professional brushcutter is a non-separable bar, in the middle of which the shaft moves. On the one hand, this is not very convenient, especially when transporting and storing the tool, since the device is quite large, and on the other hand, such a design prevents sand, dirt, dust from getting into the middle, which significantly extends its resource. Over, the connecting mechanism of the two shaft parts may loosen over time, which causes backlash. Separately, it is necessary to dwell on the shaft, which is located in the middle of the rod and transfers the engine torque to the cutting attachment. It comes in two types: flexible and rigid. The flexible shaft has the appearance of a cable and prevents damage to the gearbox when a knife strikes from a stone or tree trunk. It simply absorbs this blow. At the same time, the rigid shaft (metal pin) resists deformation under load. These brushcutters are used for mowing dense thickets and bushes.
Household brushcutters intended for work near the house, in the garden, in the garden. They rarely exceed 2 HP and can also be fitted with a line trimmer and steel blade. Structurally, they are similar to professional models, but there are some features:
- A number of household models are equipped with a curved bar, which is convenient when working in hard-to-reach places (under benches in the garden, near flower beds, between trees), since such brushcutter less overall than its counterpart with a straight bar;
- A type of handle, which can be bicycle type (like professional models), or it can be D-shaped. In the second case, a handle is attached to the brushcutter bar, which the user holds with one hand, and the other hand holds the tool by the bar near the engine. Users’ opinions were divided: which design is more convenient. The matter, as they say, is a matter of habits, since it will change from a bicycle handle to a D-shaped one or vice versa, as practice shows, not everyone succeeds
- Household models are more often found with a collapsible bar, which is very convenient for storage and transportation, since disassembled brushcutter two times less, and assembling it back is not difficult and takes a minimum of time.
Another feature that significantly distinguishes a household model from a professional one is its cost. The latter will be much more expensive. Therefore, before choose a brushcutter it is necessary to decide which tasks you will perform with its help. If you have a plot of up to 15-20 acres, it is absolutely not necessary to overpay and buy a professional tool, since in this case a household brushcutter can perfectly cope with such a volume of work.
We work with a brushcutter: basic rules
The basic requirements that are put forward for working with a brushcutter directly depend on the rules for operating a gasoline 2-stroke engine. Such a motor runs on a fuel mixture of gasoline and 2-stroke oil, which is prepared in a ratio of 1:50, that is, 1 gram of oil is added to 50 grams of gasoline. It should be said that when starting work with a new tool, it is recommended to add a little more oil. Let the brushcutter on one tank of such a mixture work at 50% of its power, then feel free to fill in the usual mixture. When preparing the fuel mixture for your brushcutter, remember that it is suitable for use for no more than two weeks, after which its properties change, which negatively affects the operation of the tool as a whole. Therefore, do not rush to prepare it in large quantities, and also drain the fuel from the tool during long breaks between mowing. There are also models with 4-stroke engines, in which oil is poured separately with gasoline, they are more economical and have a longer service life. But such brushcutters have more weight and cost more.
Before starting work, we recommend that you carefully inspect the area and remove stones, branches, and other debris from it that you may not notice in the grass during work, which can lead to breakage or to premature wear of the cutting tool. When working with a gasoline trimmer, you must remember that it is not only a practical and convenient tool, but also quite dangerous. Since the trimmer head with line or steel blade turns at a high speed, the following safety rules must be observed when working:
- Do not use the tool without the protective shield that comes with each brushcutter
- Wear glasses when working to prevent grass particles from getting into your eyes
- The engine heats up during operation, therefore, when removing the tool between mowing, it is better to hold it by the bar or the handle.
Brushcutters start-up, operation and maintenance
How to properly prepare the fuel mixture?
Oil. High quality two-stroke oil for high-speed vehicles (i.E. From 10,000 to 15,000 rpm, which is about 200 r / s). In no case should you use motorcycle oils (too low engine speed) or for water vehicles (since there is a completely different cooling system). Their use does not provide the necessary lubrication of the piston group and parts of the entire motor! It is best to use oils from renowned manufacturers such as Husqvarna, Stihl or Champion.
Petrol. Almost any pure high-octane gasoline (with a number of 92 and above, with a density in the range of 750-770 kg / m3). The purity of the gasoline must be both mechanical and chemical. I.E:
Mechanical. Defend and store gasoline for operation not in a metal container and no longer than 1 (one) month, otherwise it will oxidize and lose its operational properties;
Chemical. Must not be present impurities and additives (they have very different. Speed, degree and temperature of combustion). Old gasoline turns yellow or red, and impurities have strong odors of bitterness (for example, creosote) or acid (for example, methyl alcohol).
Fuel ratio. 1:50 (2%) or 20 ml / cm3 of oil per 1 liter of gasoline. For example, pour half a measure of gasoline into a transparent plastic bottle (1 liter), then use a medical syringe (20 ml / cm3) to inject two-stroke oil and mix, add gasoline and stir thoroughly. In case the quality of gasoline is suspicious or the working conditions are difficult, then the amount of oil can be increased to 22-25 ml / cm3. Before each refueling, the mixture must be shaken! Store the received fuel no more than 2 weeks! If the color of the mixture has changed (from sea green to, for example, chestnut), then it is highly discouraged to use it!
Running-in brushcutter engines
Before starting work, the engine may be run-in. For example, for this it is necessary to run one tank of fuel with the engine (without significant load!) With the obligatory frequent change of the speed (idle, maximum speed). Further 10 hours (2 weeks) of gentle operation: maximum speed, but light load. After running in, it is imperative to check the engine speed (using an electronic tachometer at the nearest service center) and, if necessary, adjust them by a qualified technician.
Engine. The air filter must always be clean (no dirt or sawdust); the foam filter must be moistened with oil. The fuel filter must be checked once a week (replace if necessary). Checking the tightness of nuts and screws. Before starting work. Cleaning the muffler (or its mesh) and spark plugs from carbon deposits. Of necessity.
Angle reducer. Clean every day from dirt (such a “fur coat” does not allow the gearbox to cool down normally) and apply Husqvarna grease for the gear pair.
Fishing line and trimmer heads. Use only special mowing line. Under no circumstances use wire or metal cables! Install only a line of a diameter recommended directly by the manufacturer. Wrap tightly around the bobbin, but do not cross the threads. Clean the mowing head from dirt and lubricate if necessary. A deformed or worn head can damage the gearbox and / or the brushcutter shaft.
Cutting discs. The cutting bodies simply have to be perfectly and competently sharpened using the necessary templates and files, as well as observing the angles of the cutting parts, depending on the brand of the disc. Turn double-sided discs regularly by 180 and wear evenly. A blunt disc or a disc with poor or incorrect sharpening cuts poorly, and thus, as a rule, significantly overloads the engine, which leads to a rapid reduction in its service life.
Protective covers. It is strictly forbidden to carry out work without a protective cover. This is life-threatening for the operator and can overload the brushcutter engine. For each type of cutting equipment, only use its own protective cover.
How to use a brushcutter correctly?
A haircut. Hold the trimmer head directly off the ground at an appropriate angle. The end of the string does the work. Let the string run at its own speed. Do not press the line against the mowed area! This overloads the engine and the mowing head. They can fail or simply. Melt quickly!
Cutting. The trimmer is almost ideal for cutting grass that is difficult to reach with a conventional lawnmower. Keep the string parallel to the ground as you cut. Avoid pushing the trimmer head to the ground as this can ruin the lawn and damage the tool itself.
Pruning with a knife. Mow in a swinging motion from side to side, working from right to left and working from left to right. Will be refundable. The blade should cut the grass with its left edge (on the clock face. Between 8 and 12).