What is the trimmer reel consist of. Cutting tool

The ignition coil of the trimmer for the grass. malfunctions and repair

Motokosi is a popular seasonal tool designed to remove unnecessary vegetation in the house site. Like any other technique, these devices periodically break. Repair of a he ignition coil of a trimmer for grass is one of the popular problems characteristic of gasoline cos. The ignition system itself is designed similarly on two- and four-stroke ICEs, so the elimination of the breakdown is almost the same for the tools of different manufacturers, whether it is “luxury”, Huter, Husqvarna or other brand. Ways to restore the performance of the ignition coil or replacing it with a new one. in the material further.

The purpose of the ignition coil is the conversion of rotation energy into a high.voltage discharge and the formation of a spark that ignites the fuel mixture. In the internal combustion engine, this part is called magneto, since in it alternating current is generated from rotation of a constant magnetic rotor or anchor.

Magneto constructively consists of two windings: high and low voltage. The condenser with interrupter contacts are parallel to the latter. Whereas the conclusions of the high.voltage winding are connected to the candle and body. They are both wound on a core between the poles of which a rotating magnet is installed, magnetized longitudinally.

On a note! The whole structure looks like a large coil installed on the P-shaped core.

Checking performance

Before the diagnosis of Magneto, you need to make sure that the problem is actually in this node. To do this, check the entire chain and make sure that there are no other reasons for the breakdown of the trimmer for the grass.

• First, you should carefully examine the coil for the presence of cracks and other external defects on the case. Next, you will need to study all the elements and nodes conducting the current and make sure that they are clean.
• The next step is the inspection of high.voltage wires. They must be working and reliably attached to the contacts, without traces of rust and with intact insulation.
• The next action will be checking the candle cap. As a result of careless actions, the user often tears it off from the high.voltage wire, and then improvises and creates a home.made mount. You need to understand that any poor.quality connection in this place significantly reduces the power of the electric arc of the candle.
• Then you should make sure that the candle itself is working. If you refuel a low.quality motorcycle with gasoline, the service life of this part is significantly reduced. In addition, it can be flooded or have a large incapacitance that prevents work. Sometimes the candle even takes up and does not unsc.
• Next, you need to inspect the circuit switch. On trimmers and chainsaws of Chinese.made, it very often breaks.

Having performed all these actions and excluding the listed nodes from the list of possible causes of breakdown, you should proceed to check the coil. This can be done with several methods.

Method 1

The first way to check the ignition coil involves the use of special equipment (stand). At home, it is unavailable. you can find it only in service centers.

Method 2

Magneto diagnostics by means of a multimeter. a solution that can be implemented on its own if there is such a measuring device. In this case, it is necessary to perform the following.

• Enable the resistance mode on the measuring device and set the value of 200 Ohms to test the primary winding.
• Connect the electrodes of the multimeter to the “mass” of the magneto and the outgoing contact. If the winding is intact, the resistance will vary from 0.4 to 2 Ohms.
• Turn on the 20 kOhm tester to diagnose the secondary winding. In this case, the first probe is connected to the “mass”, and the second is installed in a candle cap. Normal values-at least 4-6 kOhm. If the chain is damaged, then the tester will show infinity, and in the case of close. zero.

Accurate data about what should be the tester’s testimonies during the verification of primary and secondary winding, can be found in the instructions for using a trimmer for grass.

Method 3

If there is no multimeter, you can check the coil in another way.

Important! You need to carefully check so that the magneto does not burn. For this, it is important not to touch the cylinder by the electrode.

For diagnosis, the following steps need to be carried out:

• open the lid with which the cylinder is closed;
• remove the cap of the high.voltage wire from the candle without twisting the part itself to maintain compression;
• Place a nail without a hat tightly in the cap, it will imitate the central electrode of the candle;
• Dielectric material tie the cap with a nail to the cylinder so that the gap between the mmator of the Electrode of the candle and the mass fluctuates from 5.5 to 7 mm (the exact distance for a particular model is recommended to look in the user guide), but the part did not come into contact with the mass;
• The starter several times play the start of the engine, holding the ignition button in the on the on position;
• If a spark appears, you need to consider what color it is.

The white or bluish powerful spark is normal, and a weak glimpse of an orange or yellow shade reports a breakdown of the coil.

Often the cold magneto creates a powerful spark, but when heated due to a defect in the internal nodes, does not conduct current. After cooling the coil, the lawn mower starts again and mows the grass with a fishing line or knife until the magneto is heated. This is abnormal behavior, so you need to change the coil.

On a note! Similarly, the problem can occur when the candle is heated and cooled, so it is recommended to check the performance of both parts.

What are the coils

The main advantage of the trimmer for grass is maneuverability and mobility. Its purpose is grass growing in summer cottages, aligning lawn grass and mowing meadow.

Using this device, you can mow grass in those places where a gasoline lawn mower cannot get. In addition, using a trimmer for grass, you can easily process irregularities and slopes. If you replace the cutting element with a disk, then they can even cut and trim the bushes and flower beds.

The structure of the trimmer for the grass begins with the cutting part, then there is a bar, an engine and a handle with a control mechanism. To work with the lawn on a trimmer for the grass, a coil is installed (head). As a rule, three types of coils are different by the method of feeding fishing.

• Manual. The principle of operation is easy to determine by name: a fishing line for a trimmer is served mechanically. In order to lengthen the cord, you should interrupt the operation of the device and manually lengthen the ends. Despite the apparent inconvenience, this type of coils is the most reliable in work. Their use requires a certain dexterity, but, having learned to work with manual heads, in the future there will be no difficulties.

Having examined all three options for coils, you can come to the following conclusions: manual are the least preferable to use in terms of convenience. Semi.automatic, although less reliable, but provides basic comfort. Automatic is the most convenient, but when operating such a coil, users usually complain of increased fishing line consumption. Most users and experts agree that the most preferable and optimal is the semi.automatic coil.

As already mentioned above, there is also a universal coil for a trimmer for grass. A distinctive feature of this type of head is a wider area of ​​application. Simply put, they are not suitable for one model of trimmers, but for several. To make sure if a universal head is suitable for your trimmer for grass, you should study the marking of the part itself. If it coincides with the model of your trimmer for grass, then you can safely purchase this coil.

The advantage of universal coils is their relatively low price and widespread prevalence. The deficiency can be considered the declared support of the trimmer model for grass, although in fact they may be incompatible.

To exclude confusion, it is recommended to consult with the seller, calling him a model of his trimmer for grass in advance.

Before buying an consumable, you should study its features in advance. For example, many universal coils of metal, not plastic. Although they have a fishing line for a trimmer, as a rule, from the same universal material as most manufacturers.

How to install a coil on a trimmer for grass?

Not only the quality of the cut depends on the correct installation of the cutting headset, but also the safety of the operator during operation of the motorcycle.

During the installation of the coil, you need to adhere to the next order of actions:

• First, it is necessary to motionly fix the shaft of the standard gearbox Motokosa. To do this, you need to combine the hole in its case and the driven disk;
• Next, you need to install a metal pressure disk on the gear shaft;
• Then you need to screw the head with the fishing line on the shaft, rotating it, while against the course of the watch of the clock;
• To remove the coil from a trimmer for the grass, you will need to perform all actions in the reverse order.

During the installation and dismantling of a mowing head in the field, you need to be as careful as possible so as not to lose small spare parts gearbox in the grass. We recommend trying coconut flour in your farm. Pastries will become simply amazing, and most importantly useful!

Classification of coils for a trimmer for grass

Since trimmers for grass are produced in a wide variety, the spills on them also have several types. They are classified according to various signs: if the user is necessary in the process of serving the string, according to the material of manufacture, by design (for semi.automatic models) and by the method of winding the cord per coil.

For feeding the cord

By the method of serving fishing line, trimmer heads are divided into:

A manual coil appeared before other options. Its design is simple and reliable, but you need to unwind the fishing line for the trimmer to replace the used. To do this, you have to change the trimmer motor for the grass and stretch both ends to the suitable length.

The semi.automatic coil allows you to lengthen the cord without turning off the engine, right during operation. To do this, you need to press the head to the solid surface so that the mechanism that releases the ends of the forest works. The centrifugal force unwinds the cord, and the person again raises the head of the device above the ground, when the length is sufficient. The whole procedure takes a matter of seconds.

The automatic coil works when the braid lowers the engine speed (the gas mower has such an opportunity, but not an ethletric trimmer for grass) or starts it. The fishing line for the trimmer is advanced until the user again increases the moment.

Important! Some cutting heads are available only for specific models of trimmers, but there are coils that are suitable for instruments of different brands and types. Such devices are called universal.

According to the material

According to the material from which the working heads are produced, plastic and metal coils are distinguished. For the manufacture of the former, shockproof plastic is used, for the latter. aluminum and steel.

By design

Spilles of semi-automatic coils are one- or two-section. On a single.section cord is wound evenly, the turns are distributed along one groove. Two.sectional bobbins are divided in half, so that the fishing line for a trimmer is laid in two grooves, and when lengthening the working part, each end is fraught out of its compartment. For such a spool, the uniformity of the turns is not important.

By type of winding

By the method of winding fishing line on the bobbin, there are the following types of coils:

To refuel a collapsible bobbin, you will have to turn off the trimmer for the grass, remove the cutting head, get the coil from it, remove the remnants of the worn fishing line and manually wrap up a new one. Then collect everything in the reverse sequence and continue the mowing.

A quick.shot reel is not required to remove the cord for wrapping. It is enough to draw the ends of the new forest in the holes on the reel body, wind it on the bobbin in the right amount and cut off the excess length or cut the loop.

Attention! It is necessary to wind up the cord when refueling only in the direction that is opposite to the working movement of the coil. The desired side is most often indicated on the rogue itself with an arrow.

Coil with automatic winding of fishing line for a trimmer for grass

How to refuel a fishing line for a trimmer to a trimmer coil for grass? Video instruction

Warranty production of the factory refueling of a trimmer for the grass will be in demand for fishing line substitutions. Having a very approximate idea of ​​how to tuck a fishing line for a trimmer to the coil of a trimmer for grass without the help of others, the new ones without hunting take up this matter. But with some abilities, the development of this simple science does not represent any difficulties, and the similar annotation presented below will greatly facilitate the myth of the process.

Preliminary preparation

First of all, to wind the fishing line, it is required to remove the coil (bobbin, spool) from the trimmer for the grass. certain acts will depend on the difficulty of configuration and the type of product itself:

• Small electronic trimmers for grass with a working location of the motor and coils in the bottom, usually have side buttons on both sides of the bobbin. With the simultaneous press there, the highest part of the coil, coupled with the internal contents for winding the fishing line, is disconnected, although the lower one remains on the trimmer. The analysis of the bobbin is better to create in an even smooth place, so that the spring entering the design does not jump out of it;
• Electronic and gasoline trimmers for grass with a curved rod without the ability to install a knife, you have coils with a special lamb: in similar structures, you should hold a spool in a motionless position with one hand, and turn the fixing bobbin on the stalk a barack nut. After disconnecting the nut, the whole bobin is removed.
• Electronic and gasoline trimmers for grass with the ability to install a knife on a straight rod (nettles, trimmers for STIHL grass) have a hole. For the immobility of the bar, a screwdriver or another suitable object is inserted into this hole and with unhurried rotation, such mutual placement is achieved when the screwdriver enters the holes and the bobin is fixed. After that, the coil body is scrolled clockwise (with the left thread) and removed from the trimmer for the grass.

For the second and third options of coil, depending on the design, are versed in different methods. In the bobbins with a lamb, lamb is twisted, in the reels with the latches, the fixers are pressed and one part of the coil is freed from the other. If the halves of the spool are connected by thread, then they are quite turned with their hands in the back sides until they are completely developed.

Removing and disassembling the coil

The braid trimmer head consists of a casing, a spring (not in every model), bobbins with a cord, cover. Before proceeding to disassemble the coil of the electric unit, be sure to turn off the trimmer for the grass from the network. The disassembly method depends on the mounting of the mowing head. First option:

• To remove the lid covering the inside of the head, click on the latches (latches), which are located on its two sides.
• Remove the lid under which you will see the spool. remove it from the body. Some trimmers have a spring under the bobbin coils, which should also be carefully pulled out.
• Removing the bobbin, you will see the screw in the center of the case. Unscrew it with a screwdriver.
• After extracting the fasteners, take the case body and, shaking it in different directions, remove the gearbox from the shaft.

In the second version, the head of the trimmer for the grass is twisted onto the shaft of the gearbox. To remove it, you need to fix the shaft. To do this, in such devices there is a hole through which a thin screwdriver or metal rod is inserted. Brief Instruction:

• Insert a screwdriver into a special hole, then stall the shaft.
• Get the body of the head and start twist it. This should be done clockwise, t. to. Larva shaft thread.

Winding of fishing line on a reel

Fishing winding

Tramoring the fishing line in a trimmer coil for grass is a relatively simple procedure, provided that you adhere to a certain algorithm of action. When you need to determine how many meters of consumables are enough, wind it on the bobbin so that the skein does not exceed the diameter of the sides. Having decided on the length of the cord, follow the following instructions:

• Fold the consumable material so that one end of the fishing line is 10-15 cm longer than the other.
• You need to start charging with the central side, which divides the backpack of the trimmer for the grass into 2 parts. Find a groove where the cord should be inserted. The latter is bent twice.
• Determine in which direction you need to wind the fishing line for the trimmer. To do this, take a look at the bobbin on which there can be an arrow or inscription. She indicates the side of winding. If there are no designations on the coil, then look at the arrow on the mowing head. carry out windings in the opposite direction.
• Wash the consumable material carefully, a round to the round. Try to adhere to maximum thread tension.
• After completing the cord laying, fasten first the short end of the material. To do this, insert it into the groove on the side of the coil, which is suitable in diameter. The second end (more authentic), attach to the groove on the other side of the backpack of the trimmer for the grass.
• By fixing the fishing line for the trimmer, cut its ends. Do not forget to leave allowances about 10 cm.
• Install the refitted coil to the mowing head of the device. To do this, you need to insert and pull the thread alternately into the weekend of the head, then place the keyboard of the device in the skin.
• By applying the required force, pull the cord from the fixing grooves and tighten the material. At the end of this action, put on the lid and fix it using the latches.

The step.by.step winding of the fishing line on the coil to wind the cord per trimmer for the grass can be also in another way, in which two segments of the material are charged instead of one. The replacement is carried out like this:

• Bend one end of the cord thread in the form of a hook.
• At the bottom of the bobbin there should be a hole that is designed to fix the fishing line. Insert the bent over the end of the thread there.
• Wind the cord material in the direction of the arrow to the desired level, which does not exceed the diameter of the coil of the trimmer for the grass.
• The same actions need to be done for the second cell of the bobbin.
• Assembly of the device head is similar to the first way.

The device is a trimmer head

Semi.automatic trimmer heads are considered the most popular in the market. A typical representative of the mechanisms of this type is a universal semi.automatic head, which is equipped with electric trimmers for grass and lawn mowers such well.known brands as Bosch, Huter, Husqvarna, etc. Its device is shown in the figure.

• Corps (pos.6) with a lid (pos.1), equipped with special eyes (poses.5) through which the cutting cord is displayed;
• Shpulya (pos.3), on which a fishing line for a trimmer is wound (pos.7);
• a pressing spring (pos. four).

There are other simpler heads.

Characteristic malfunctions and their independent elimination

Naturally, during operation, the owners of the trimmers are faced with certain malfunctions of mowing heads. over, they are most often associated with certain difficulties in pulling (lengthening) of the cutting cord from the coil. The most common causes of the lack of fishing line is its “bite” between the turns or sticking.

If the string is not served

In this case, the cause of the defect is incorrect winding of the cutting cord. A trimmer fishing line can be wound with insufficient tension, which helps to cross the turns together and confuse the string. When the coil rotates, the cutting cord under the influence of the emerging centrifugal force is delayed, which in turn leads to the clamping of the free end of the fishing line between the turns. To eliminate this malfunction, you need to dismantle the coil, disassemble it and rewind the string so that the turns lie down in even rows, pressing tightly against each other.

If the string sticks together

Squeezing of the turns of the fishing line directly in the mowing head can be caused:

Advice! To avoid sticking the cord inside the mowing head, experts recommend applying a thin layer of silicone lubricant after refueling the string to the coil. In addition, it is better not to use a fishing line for a trimmer of unknown manufacturers.

If, nevertheless, the user could not avoid sticking the fishing line, then to repair the trimmer coil for the grass, you need to remove and replace the existing cord with a better.

If there is too much string consumption

When using semi-automatic mowing heads, the user can detect the accelerated consumption of the cutting cord due to its spontaneous lengthening. As a rule, this happens due to the weakening of the spring installed inside the coil. You can eliminate the malfunction by putting several goals under the spring.

If the bobbin does not spin

The refusal to work the semi.automatic coil of the trimmer for the grass can also be caused by a frequent clash of its head with solid objects (dry branches, soil, stones, etc.). In this situation, there is a slight stretching of the fishing line, and then the rapid retraction of it inside the bobbin. Due to severe friction, the cord is heated, which can lead to sticking its turns to each other. To eliminate the defect, the string will need to be rewound.

If the string is served spontaneously

Spontaneous lengthening of the fishing line, followed by pruning its tips, may be caused by a violation of the order of assembly of the head after replacing the cutting cord. Often, users who do not have sufficient experience forget to install the pressing spring inside the head, which causes premature operation of the mechanism responsible for the supply of fishing line.

Dismantling the spit head

Starting to repair the head of the trimmer head for grass, the owner needs to protect yourself from injuries when randomly starting the engine, for which you must completely de.energize the electric garden tool or drown out the engine motorcycle engine. Most often, the owner of a trimmer for grass is faced with the need to replace the cutting cord. This process is started after the head is dismantled from the shaft. This must be done carefully to avoid damage it.

Important! The gearbox shaft, which is equipped with a trimmer for grass, has a left thread at the end, so the mowing head is taped clockwise when removing.

Dismantle the coil in the following order:

• Having combined the holes available on the axis and washer, the mowing shaft is rigidly fixed by means of a screwdriver or a metal rod;
• unscrew the executive mechanism, rotating its case clockwise.

Having removed the braid head, they begin to disassemble it, for which you need to carefully open the lid, which is most often attached specially provided for by plastic locks. To do this, squeeze the edges of the lid and at the same time drown in the hull of the latch.

Attention! If the trimmer for the grass is equipped with a semi.automatic head with a button at the bottom, then it needs to be opened by observing special caution, when removing the cover, a pressing spring can fly out and get lost.

Charging the string in the spool

To charge the fishing line for the trimmer correctly, it is necessary to act according to the instructions for the operation attached to the trimmer. As a rule, this operation is carried out as follows:

• cut off the right amount of cord and fold it in half;
• The resulting loop is inserted into one of the specially provided grooves (holes) of the spool;
• Pulling the fishing line for the trimmer, they turn the spool counterclockwise several times, while the coats of the cord should be laid in dense layers (one to the other), avoiding overlap;
• Having finished winding, the ends of the fishing line (about 20 cm) are left free, which are fixed in the grooves available on the sides of the spool;
• mount the mechanism in their place, for which it is necessary to assemble it in the reverse order, returning to its original position all the available details (spring, washers, etc.), and install the coil with a string in the body of the head;
• The free ends of the cord are passed through the existing eyes (holes), after which the body is closed with a lid, which is fixed with latches.

On this charge of the spitter head, the cord can be considered complete. The coil is screwed onto the shaft of a trimmer for the grass, having previously stiffly fix it. How to do this described above. You can check the performance of the head by mowing a small area of ​​the lawn.

Advice! In those cases when the owner of a trimmer for grass prefers to replace the failed head of the new one, experts recommend avoiding the acquisition of cheap non.original coils brought from China.

TOP-3 most reliable coils for domestic use

The market has its own rating of the most durable mowing heads. They are distinguished by the simplicity of the device, reliability and resistance to damage. They include:

3rd place-Bosch K-103. This is a universal coil weighing about 300 g. Most often it is used to equip a motorcycle company Makita and Hyundai. The model is highlighted by a low flow rate of the cutting cord, resistance to blows and durability. The core and its other spare parts are made of forged steel, and the case is made of plastic;

Despite the stability and durability, all of the listed coils cost an order of magnitude cheaper than other, less high.quality analogues, which makes them leaders in the market of the post.Soviet space.

How to install a coil on a trimmer for grass?

Not only the quality of the cut depends on the correct installation of the cutting headset, but also the safety of the operator during operation of the motorcycle.

During the installation of the coil, you need to adhere to the next order of actions:

• First, it is necessary to motionly fix the shaft of the standard gearbox Motokosa. To do this, you need to combine the hole in its case and the driven disk;
• Next, you need to install a metal pressure disk on the gear shaft;
• Then you need to screw the head with the fishing line on the shaft, rotating it, while against the course of the watch of the clock;
• To remove the coil from a trimmer for the grass, you will need to perform all actions in the reverse order.

During the installation and dismantling of a mowing head in the field, you need to be as careful as possible so as not to lose small spare parts gearbox in the grass.

Classification of coils for a trimmer for grass

Since trimmers for grass are produced in a wide variety, the spills on them also have several types. They are classified according to various signs: if the user is necessary in the process of serving the string, according to the material of manufacture, by design (for semi.automatic models) and by the method of winding the cord per coil.

For feeding the cord

By the method of serving fishing line, trimmer heads are divided into:

A manual coil appeared before other options. Its design is simple and reliable, but you need to unwind the fishing line for the trimmer to replace the used. To do this, you have to change the trimmer motor for the grass and stretch both ends to the suitable length.

The semi.automatic coil allows you to lengthen the cord without turning off the engine, right during operation. To do this, you need to press the head to the solid surface so that the mechanism that releases the ends of the forest works. The centrifugal force unwinds the cord, and the person again raises the head of the device above the ground, when the length is sufficient. The whole procedure takes a matter of seconds.

The automatic coil works when the braid lowers the engine speed (the gas mower has such an opportunity, but not an ethletric trimmer for grass) or starts it. The fishing line for the trimmer is advanced until the user again increases the moment.

Important! Some cutting heads are available only for specific models of trimmers, but there are coils that are suitable for instruments of different brands and types. Such devices are called universal.

According to the material

According to the material from which the working heads are produced, plastic and metal coils are distinguished. For the manufacture of the former, shockproof plastic is used, for the latter. aluminum and steel.

By design

Spilles of semi-automatic coils are one- or two-section. On a single.section cord is wound evenly, the turns are distributed along one groove. Two.sectional bobbins are divided in half, so that the fishing line for a trimmer is laid in two grooves, and when lengthening the working part, each end is fraught out of its compartment. For such a spool, the uniformity of the turns is not important.

By type of winding

By the method of winding fishing line on the bobbin, there are the following types of coils:

To refuel a collapsible bobbin, you will have to turn off the trimmer for the grass, remove the cutting head, get the coil from it, remove the remnants of the worn fishing line and manually wrap up a new one. Then collect everything in the reverse sequence and continue the mowing.

A quick.shot reel is not required to remove the cord for wrapping. It is enough to draw the ends of the new forest in the holes on the reel body, wind it on the bobbin in the right amount and cut off the excess length or cut the loop.

Attention! It is necessary to wind up the cord when refueling only in the direction that is opposite to the working movement of the coil. The desired side is most often indicated on the rogue itself with an arrow.

Criterias of choice

Before buying a spray, you should contact the documentation for a trimmer for grass, which indicates the recommended parameters of the mowing heads, the thickness of the fishing line, the diameter of the landing hole for the coil, type of mount, thread (left or right) and a fixation axis (stiff or rotating at 90/180/ 360 degrees). The same information is indicated on the packaging of consumables along with models of technology, on which you can install a specific head.

• Of the three types of coils by the method of serving fishing line, it is better to choose semi.automatic. They are more convenient. Among these spools are quick.charged models, as well as universal samples designed for different trimmers and with holes for a fishing line for a trimmer of various thicknesses. With this head, you can mow two or three types of grass: soft lawn, wild and tall, with hard stems. For each type of thicket, you will need to buy only a cord of a suitable section, and not a separate coil.
• If only vegetation of a certain type is to mow, you can stop on a coil under a fishing line for a trimmer of one diameter. Knives or discs will cope with other tasks.
• Too cheap cutting of brittle plastic heads quickly break, so excessive savings can turn into new expenses.
• You should not install the coils of little.known brands for trimmers for grass from eminent manufacturers. Popular companies are produced by components that are best for equipment of the same brand.

Often market leaders produce coils for trimmers of other companies. In this case, the replacement will work no worse than the original. For example, the Denzel 96304 working head is suitable for gasoline and electrimmers of the same brand, but is also recommended for use on mower mowers Greenline and MTD.

On a note! Some coils are designed to work only with trimmers of one manufacturer, although the lineup can be quite wide. So, the T25 head for the Husqvarna 128R gasoline apparatus is suitable for three dozens of travo.shirt models of the same company.

Among the best manufacturers, it is worth highlighting German companies Al-ko, Bosch, Stihl, Gardena, Swedish Husqvarna, American Black Decker, Patriot, Japanese Ryobi, Makita, Champion, Denzel, Huter, Hooper, Ukrainian Foresta.

Prevention of the problem

Often, the breakdown of the ignition coils are associated with the closure or cliff of windings and mechanical damage to the magneto body. This is due to strong blows, fluid and oxidation, as well as overheating. If you avoid such incidents, you can not worry about the integrity of the ignition coil.

Important! To prevent regular failure, one of the most important components of the ignition system, you need to refuel high.quality fuel. Bad fuel spoils these details.

One of the nodes of Magneto, which regularly suffer when using, are high.voltage wires through which current from the ignition module enters the candles. They have a high service life, but the damage to them is caused by users by an inaccurate circulation when replacing candles, carefully pulling the wire itself, and not for the tip. Another problem that can happen to them is moisture and oxidation or damage to isolation. If you carefully pull out the candle and avoid the penetration of the liquid into the device, these problems can be avoided.

So, the repair of the ignition coil is not very complex and can be carried out by the user independently, but subject to the above procedure for disassembling and replacing the magneto or contacts of the interrupt.

Why is the ignition adjustment

In some cases, when the engine does not start, the ignition adjustment will be required. Of course, first you need to check the serviceability of a candle and a high.voltage cable with a cap.

It is necessary to adjust the ignition on a two.stroke engine in order to ensure timely ignition of fuel in the engine combustion chamber. Below is a scheme from which you can understand the principle of operation of the internal combustion engine.

The spark in the candle should appear at the time of compression of the fuel with a piston, when it does not reach the upper dead point (VMT) at least a little. Когда поршень проходит ВМТ, происходит возгорание топливной смеси, в результате чего поршень под действием энергии взрыва уходит вниз.

Therefore, if for some reason (mainly this is due to the shift of the flywheel to the shaft relative to its original position), the fuel fire occurs earlier than the piston passes, then it returns back, and the crankshaft scrolls in the opposite direction. Such a movement can damage the starter knot, cut off the launch cord, etc.D. In this case, an early ignition of fuel occurs.

There may also be a later ignition on the trimmer: the piston after compression of the fuel, which does not ignite, goes down, and at that moment a spark appears. In this case, the engine will either not start or significantly lose power and will be poorly gaining momentum.

But such problems with early or late ignition on two.stroke ICE are quite rare, since the flywheel with magnets is already established in the correct position, which is perfectly synchronized with the movement of the piston. In addition, the flywheel is fixed on the shaft using a key and nut. Therefore, the wrong installation of the part is excluded.

Basically, the ignition adjustment is to set the correct clearance between Magneto and the flywheel.

Conclusions. which head with a coil to choose for a trimmer for grass

Summing up, consider when buying heads for trimmers for grass and lawn mower, the following factors:

• Type. It can be a small lawn with young green grass or several hectares of area with thick.nisted vegetation. For the second case, you may need to purchase a metal knife for a lawn mower
• The number of segments of the fishing line protruding from the head. This amount can be different-from one to 6-8 pieces. The larger the number of fishing line segments, the higher the speed of the urgent. In addition, the more segments, the smaller the grass is grinded when it is red
• The fastening axis. as a rule, household and professional instruments have different mounting diameters, which is important to consider when buying a head. Even if you bought a coil with a landing hole that does not fit your tool, then the problem is solved by using special adapters
• Type of fastening axis. they are fixed and rotating on different angles from 90 to 360 degrees. The presence of rotation function allows you to make grass of grass even in the most inaccessible places
• Fishing diameter. depends on the power of the power unit. For low.power trimmers, fishing lines with a thickness of 1.3 to 1.6 mm are used, and cords from 1.8 mm thick are used for more powerful units

Sometimes for choosing the optimal model for a trimmer for grass it takes a lot of time, therefore, given all the tips and recommendations, you can significantly reduce these costs.

Knife nozzle for a trimmer for grass

Walking shopping in search of spare parts is an ungrateful thing, and I refused this thought right away. What is the point of wasting time and money if a new part lasts no longer the previous one, but only until the first meeting with some kind of piece of iron lurked in the grass. It is better to immediately replace a broken reel with a home-made nozzle with stainless steel knives (see. a photo).

The design of the nozzle is very simple. For its manufacture, it took only four details: the central sleeve, the washer and two knives-knives (see. rice.)

I made a central sleeve out of a pruning of a conventional tap pipe. To adjust its inner diameter to the diameter of the shaft, on one side of the blank made a through longitudinal section and slightly besieged with a hammer. The sleeve should sit on the shaft tightly, without backlash.

The puck of suitable sizes I managed to choose the finished. But, if there is no one, it is not difficult to cut it out with a sheet steel with a thickness of 34 mm and finalize with a file. I put on the puck on the sleeve and welded at four points. This is quite enough.

The knives-knives cut out of the sheet stainless steel 1 mm thick. The knives are attached to the puck on rivets. They must be steel. I used M4 screws as rivets. They must be blown up so that the knives are not firmly pressed to the puck, but they can turn freely. This is a very important point. If the knives are fixed hard, then they will surely bend or break at the first meeting with the stem, which will not be able to cut down the shaft of the trimmer for the grass.

The collected nozzle is put on the shaft of a trimmer for the grass and fixed with a copper copping cup of ∅3 mm. Shplint’s hole is best drilled in place.

The first tests of the trimmer for grass with a new knife nozzle confirmed its effectiveness. Knives easily “took” almost any grass. And with leisurely work, the electric motor was practically not overloaded. In a word, what is necessary!

However, we should not forget that metal knives are a more serious danger than a thin, almost weightless fishing line for a trimmer. Therefore, to mow grass around the house is desirable when there are no people or pets nearby. And, of course, it is necessary to constantly monitor the wear of the knives and the rivets attaching them.