How to insert a trimmer line into a grass trimmer reel

Trimmer reels (heads)

Mowing heads with the lines placed in them, along with knives and discs, are in the list of cutting equipment for trimmers. The main function of mowing heads, or as they are often called coils, is to cut the grass quickly and accurately. Today, there are various types of mowing heads on sale. All of them are divided among themselves, mainly on the principle of feeding and charging the line. This classification allows almost any beginner gardener to choose the best mowing head.

Most amateur and household brushcutters are characterized by a simple design. They consist of an engine, a boom in which there is a flexible or rigid drive shaft, a handle and a cutting organ, the role of which is often played by the grass trimmer head. According to the principle of filament feeding heads are divided among themselves into the following types:

  • manual. this type of head gets its name because the cutting filament is fed manually. Each time it is necessary to lengthen a line for a trimmer, the operator must stop working with the trimmer and pull it out mechanically. This brings its own inconveniences, but it is this type of device is considered the most popular among gardeners. Manual reels differ from their counterparts in durability and low prices;
  • semi-automatic. with this type of head, you can extend the cord by pressing the head against the ground. During this, the button is pressed, which activates the anchoring mechanism. It creates a centrifugal force that pushes the cord outward. Semi-automatic head for grass trimmer has one important advantage. when using it, you do not need to stop working with the brushcutter, as you can extend the line for the trimmer when the engine is running. The only drawback. the semi-automatic cutting headset costs a little more than manual reels;
  • Automatic. this type of head is easy to use. To extend the cord, all the operator has to do is reduce the engine speed. The automatic factory grass trimmer reel differs from its counterparts in its ease of operation. Nevertheless, the of this type of headset are the highest on the market.

Each of the listed types of cutting devices is suitable for use in those or other conditions. Manual heads are best used in areas with hard obstacles. The low cost of this type of head will make it possible to buy several manual heads at once, and change them one by one as they break down. Automatic models, on the contrary, are quite expensive, so they are best used for the care of clean areas.

Types of semi-automatic heads

Semi-automatic mowing head. usually consists of a housing with several springs and a bobbin inside. Spools, by their design, are divided into:

Many owners of household trimmers remake one-section bobbins on two-section. To do this you need to find a solid metal plate, and draw the contour with the diameter of the bobbin. After that, the plate is cut on the contour so that the thickness is near the place of winding the cord. As a result, the resulting circle should move freely around its axis. Next, you need to make a cut on the resulting ring and slip the bobbin inside the ring. The two parts need to be joined together using tape or quick-drying glue. As a result, the manufacturer will have a bobbin, line for the trimmer in which you can wind in two sections.

Selecting the fishing line

In order to easily wind the line for the trimmer on the grass trimmer spool, it is worth deciding on what tasks the garden tool will perform. The thicker the thread that is threaded into the head, the more difficult the tasks it will be able to perform. Note that it is often necessary to use a multi-purpose cord that is no more than 2mm wide. You, in turn, can determine the size, using the following methods:

  • Read the information in the manufacturer’s instructions;
  • Check the suitability of the line for use yourself by trying to insert it into the hole of the spool;
  • Examine the bobbin for information on the diameters allowed for use.

Selecting a fishing line to fill in the grass trimmer reel can be made by the type of engine. For example, excessively thick thread can affect the increase in rotational resistance. Because of this, the load on the engine will increase, which will certainly affect the quality and duration of its further operation.

It is not difficult to avoid negative consequences. For this you need to consider that for electric motors with power up to 500 W a trimmer line with a diameter of up to 1.2 mm is ideal. If you can’t get such thread, you can use 1.6mm cord. Thread with a diameter of 2 mm, in turn, is used for engines with a power of more than 1 kW. It is worth noting that 2 mm cord is often used for winding on a bent mower. If the gasoline device has a straight shaft, you should use a thread of 2.5 or 3 mm. The thickest lines are installed exclusively on devices whose power is equal to or greater than 1.3 kW.

Choosing a line for a grass trimmer

Last but not least is the type of line section. When choosing it, it is worth focusing on the tasks set for the gardening tool. There are several popular variants of the cross-section:

  • Twisted. has a small margin of safety, which makes it suitable only for young grass;
  • serrated. characterized by sharp edges, suitable for working in overgrown weeds;
  • round. the most common cross-section. Such lines cope well with fresh grass, but are not suitable for bushes and dead wood;
  • Rectangular, square, and star-shaped cords are used for working on the lawn because of their low strength.

The strongest and most versatile cord is a two-piece trimmer line with a circular cross-section, with a core inside. This is the thread that is suitable for most of the work. It should be remembered that the use of fishing line, ordinary wire and other third-party materials as cord is a danger to others.

Removing and disassembling the spool

In order to properly wind the trimmer line on the grass trimmer reel, you need to familiarize yourself with the structure of the trimmer head. It consists of a protective cover, a bobbin with thread, a housing cover, and a spring, which is present only in some devices.

Before starting to disassemble the reel, it is necessary to completely turn off / disconnect the device. The way in which the work is done is directly dependent on the type of head. The first option is to carry out the following steps:

  • The user presses the latches located on both sides of the cover.
  • After removing the cover, the bobbin is removed. In some models, there may be a spring, which must also be removed.
  • In the center of the housing there is a screw, which should be unscrewed with an ordinary screwdriver.
  • When the fasteners are removed, it remains to remove the gearbox from the shaft by gently rocking the product body.

The second option for removing the spool for filling the fishing line in the grass trimmer is to twist the head on the gear shaft. For this procedure, many devices are equipped with a hole into which the tool can be inserted. Once the screwdriver is inserted, the user has only to take hold of the product body and twist it clockwise. It is noteworthy that this method, unlike the method described earlier, is characterized by the simplicity of execution.

How to change a line for a trimmer on a trimmer

The line for the trimmer is wound on the spool (bobbin), which is located in the body of the trimmer head for grass. First unscrew the head from the brushcutter bar and open its top cover by pressing on the side latches. On some models the body just unscrews.

We take out the spool, clean it from dirt, remnants of old fishing line. Reels come in one or two sections.

Spooling line on a one-section reel

Take 2 m of fishing line, push it halfway through the hole in the spool. On both sides of the hole you can see the ends of the line sticking out at the same length. Wind them both on the groove of the reel in the direction of the arrow on the body (the reverse rotation of the reel on the shaft of the grass trimmer). We don’t wind the line for the trimmer to the end. the pieces of 10-15 cm, which will be usable, we fix in the slots on the side of the spool. A lock is needed so that the trimmer line does not unwind when it is inserted into the grass trimmer head.

Insert the spool into the head body, at the same time put the free ends of the line through the holes of the body, put it out. Let’s assemble the head and put it on the grass trimmer. That’s it, the line change in the trimmer is done.

How to wind a line for a trimmer on a grass trimmer with a two-section reel

If the reel has two sections, the line for the trimmer fold in half and the bending place is inserted in a special groove in the edge between the sections. Let’s start winding the ends of each reel along its groove, the next step is the same as with the one-section reel.

How much fishing line should be wound on the weed trimmer?? You can reel in 2-4 m, depending on the model. In each case it should not be wound too tightly, the thread should have a free run for pulling during work.

Changing the line for the trimmer on the disk

The order of work to change the fishing line on the disc in the trimmer is as follows:

  • Let’s remove the protective cover from the boom;
  • Lock the grass trimmer drive shaft by threading a screwdriver through the hole in the gear bowl to the hole in the shaft hub;
  • Unscrew and remove from the hub of the drive shaft trimmer for grass and a spool of fishing line;
  • Install the cutting disk on the shaft, combining the slits on the hub washer with notches in the mounting hole of the disk;
  • We block the grass trimmer‘s drive shaft again and tighten the fixing nut. It is advisable to tighten the nut with a pipe wrench, but not to overdo it;
  • Putting back the protective cover.

That’s it, the lawnmower is ready to work with the cutting disc.

Important! The cutting elements must be changed carefully, respecting the safety instructions. It is absolutely necessary to read the instructions and follow all the rules stated therein. This will guarantee productive, reliable and safe operation of the grass trimmer.

Removing the reel from the grass trimmer

On small electric trimmers with the bottom arrangement of the engine (when it is at the ground when working) the spool usually has two keys on the sides. We press them and disconnect one half of the spool body from the other half, which remains on the trimmer. Together with the first half, the inner part, on which the line for the trimmer is wound directly, is also removed. Be careful when disassembling: there is a spring inside, which can fly out and get lost.

On electric and gasoline trimmers with a bent boom (there is no possibility to put a knife on such trimmers) it is necessary to grasp the coil body itself with one hand, and the second hand should start turning counterclockwise the wing nut, which is on it. It is it that attaches the spool to the grass trimmer bar. After unscrewing the thumbscrew, carefully remove the entire spool, trying not to lose the spring inside.

On electric and gasoline trimmers with a straight bar and gear on its end (in such trimmers for grass in addition to the fishing line can be installed and the knife) are looking for a hole under the spool, insert it, for example, screwdriver, quietly turn the spool, until the screwdriver will penetrate even deeper, and the spool will be fixed. Now twist the whole spool clockwise (since the thread is left) and remove it from the grass trimmer. Next, disassemble the coil. It can be assembled with snaps or with a wing bolt. If the spool is on the latches, we press on the sides of the latches base, so they will bend and release one half of the spool body from the other half. You just need to unscrew the wing bolts. There can be also a third type of connection of two halves of such coil: in this case you need to grasp the lower part with one hand and the upper part with the other and start turning them in opposite directions. When disassembling such a coil, you should also be careful not to lose the spring inside the coil.

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Now, after removing and disassembling the spool, let’s start winding.

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What kind of line is used for grass trimmer??

There are several kinds of line for the trimmer:

  • Stronger. round;
  • For mowing soft vegetation. shaped;
  • For mowing narrow grass. notched;
  • Specific. Suitable for certain types of grass trimmer.

The type of cross section of the cutting line must match the vegetation to be mowed.

If you need to change the line for the trimmer, you need to pick up exactly the kind recommended by the manufacturer of this particular model of trimmer for grass, in other words, the thickness of the cutting thread must fit the power of the motor and the size of the unit.

It is best to choose a specialized cutting filament. It is worth soaking the trimmer line for a while if you plan to change it in the reel.

After soaking it becomes elastic and stronger.

Cutting filament can be made of various components. One of the most common is nylon.

This material is characterized by the highest degree of wear resistance, the ability to withstand different temperatures and the highest loads.

nylon trimmer line can be stored for long periods of time, it will not dry out or lose its strength.

Because its service life can be quite long.

Grass trimmer reels or heads have different structures:

How to catch more fish?

  • Single string. In the modification of such a grass trimmer there is only one working line for the trimmer. Used such a unit in the main for small jobs, such as trimming grass.
  • Two-string. Can be both automatic and automatic. This set includes two strings. Such a grass trimmer is used for mowing and clearing areas.

Instructions on how to properly wind the cutting filament on the grass trimmer reel:

  • The first thing to do is to disassemble the head. To do this, press the latch and turn the lid to the side. Next, the bobbin can be removed.
  • Measure out the right amount of cutting thread and insert it into the slot.
  • Wind the trimmer line on both sides in the direction of the arrow.
  • The 15 cm ends should be left unreeled.
  • These ends are inserted in opposite slots.
  • Then the ends are fastened in the hole in the head.
  • After that, carefully insert the bobbin into the body, to do this, you need to gently press on it.
  • If necessary, you can pull the remaining ends of the thread out. To do this, first pull one end of the thread and then the other so that they can easily pass through the slots in the head.
  • Now you should assemble the grooves on the body and screw on the cover.
  • Then press the bobbin and try to spin it as far as it will go. If you hear a click, the bobbin has clicked into place.
  • Then pull the loose ends of the thread all the way out.

How to wind the line for the trimmer on the mowing head of the grass trimmer or brushcutter

This video shows in detail how to wind the line for the trimmer on the grass trimmer spool or brushcutter. Threading a mower line.

How to wind a line on the brushcutter head (grass trimmer)

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How to choose a line

To get the right line for your trimmer head, it’s important to choose the right line. The thicker the cord you thread, the thicker and tougher the grass it can cut. You often use a 2-mm-diameter multi-purpose line for your trimmer. You can find the right diameter for your mower in the following ways:

  • Look for information on line thickness in the instruction manual supplied with your trimmer.
  • Note the bobbin itself. Sometimes information about the possible line diameters is printed on it.
  • Another option is to try inserting a cord into the outlet. If it passes through the box without any problems, the selected line diameter is suitable.

Reel for grass trimmer

You can choose a cord according to the type of engine. If the line for the trimmer will be too thick, it will increase the resistance to rotation. the motor in this case will overheat greatly and will soon fail. Useful recommendations:

  • For an electric device with a motor less than 500 V, a 1.3 mm thick filament is suitable. If you can’t find one, you can use 1.6 mm trimmer line. If the power is more than 1 kW, then choose a cord with a diameter of 2 mm.
  • With gasoline grass trimmers, it matters the shaft mower. A 2 mm cord is often used for the bent variant. If the shaft is straight, then install a 2.4-2.5 or 3 mm cord. The thickest cord for the trimmer is installed on powerful devices. from 1.3 kW.

Pay attention to the type of cord cross-section as well. Some popular options:

  • The most common lines with a circular cross section. They give a good cut of fresh grass, but are poorly suited for shrubs, dead wood.
  • Twisted (spiral) cord is not very strong, but not bad for thin young grass.
  • Sharp-edged, serrated thread is ideal for large weeds in a neglected area.
  • You can mow the lawn more evenly with rectangular, star or square grass trimmer lines, but they are not very durable.
  • The strongest is a two-piece cord with an inner core and a round section.

Types of lines for grass trimmer

Note that you cannot use wire, metal strings and rope, or ordinary fishing line instead of fishing line. The device will be dangerous for both the user and others. So the rope or similar products will gradually start to come off, causing the ends to unravel and the small pieces to fly away at high speed.

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How the line head works on the brushcutter Why you need to know the principle of operation

Depending on the manufacturer, the heads differ structurally not only externally, but also internally. Most reels have a compression spring inside (semi-automatic and automatic). Above is an instruction on how to disassemble the grass trimmer head without a spring, t.е. on the manual head. The principle of disassembling a semi-automatic trimmer head with a spring inside is almost identical to the above instruction.

The principle of operation of the semi-automatic grass trimmer reel is as follows:

  • inside of the head is the spool and it is mounted on slits that prevent it from moving freely
  • The reel is acted upon by a spring that presses it against the slots in the cover structure
  • A line for the trimmer is wound on the tip, the length of which depends on the tool itself. Usually this length is from 1 to 4 meters
  • During operation, when the line length needs to be increased, the protruding part of the reel is pressed, so that it is disengaged from the slots. At the same time the line for the trimmer is coiled from the drum, increasing in length
  • After releasing the desired amount of line, release the clamp and continue mowing

The advantage of a tool with a fishing line is that this consumable does not require sharpening, compared to metal discs. over, if a stone or wood gets in the way, the line for the trimmer simply comes off, without negatively affecting the gearbox and the engine of the tool, as it happens in the case of metal cutting discs.

Knowing the construction and device of the types of mowing or trimmer heads, it is necessary to proceed to consider the process of threading the line into the grass trimmer reel. After all, it is this point that most owners of special tools have difficulty.

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How to insert a fishing line into a grass trimmer reel?

Filling the mowing reel with cutting filament for the grass trimmer is not a difficult task, but beginners gardeners will have to practice a little to be able to quickly insert the cord into the existing household grass trimmer in the future.

There are only a few ways to thread the grass trimmer’s mowing head. The first method is the easiest, and is well suited for beginner gardeners.

The cord is then inserted into the spool in this sequence:

  • First, you need to rewind about 6 m of line from the common spool for the grass trimmer, and then cut the resulting section in half. As a result, you should get 2 threads, each 3 m long;
  • Then on one of the ends of the first section will need to make a kind of hook, and insert it into one of the through holes located in the upper part of the bobbin;
  • Next, begin winding the line on the bobbin in the direction indicated by the arrow. While winding, make sure that the line for the trimmer lies evenly on the surface of the bobbin, and does not go beyond its upper section. It is not necessary to wind the cord all the way to the end, about 15 cm of thread should remain in your hands;
  • The remaining free end of the wound cord will need to be inserted into one of the notches located at the top of the spool;
  • Then the same procedure should be done with the second piece of fishing line. It is necessary to wind it on the lower section of the bobbin;
  • As in the first case, winding the line for the trimmer on the lower section to the end is not necessary. The remaining piece of thread must be inserted into the second slot of the bobbin.

After the operation is complete, the spool will need to be installed on the grass trimmer and wind it. To check that the thread is secure, you will need to press the throttle lever all the way down so that the engine reaches maximum revolutions. If the line for the trimmer does not fly out of the head, it means that the line for the trimmer is held securely, and while cutting the grass it will not fly out of the mowing spool.

How to wind a fishing line for a trimmer on a grass trimmer reel?

The second method is a little more difficult to do on your own.

Wind the cord for the grass trimmer should be in the following order:

  • First cut off about 6 meters of cord from the total and bend it. One of the parts should be slightly larger than the second;
  • Then the thread where it was bent needs to be inserted into the recess located on the separating edge between the two sections of the bobbin. As a result, the first part of the segment should be at the top, and the second. in the lower section of the bobbin;
  • After that, you need to start winding the line. This should be done in the direction of the arrow on the bobbin case. The cord should not intertwine while winding. The top half of the line should be wound carefully onto the top bobbin and the bottom half onto the bottom bobbin. This should then leave two 15 cm strips of cord free;
  • Next, the remaining ends need to be inserted into the notches located at the top of the bobbin;
  • Then the fixed ends have to be slipped into the through holes of the grass trimmer’s mowing head.

At the end, you need to connect all parts of the mowing head, and pull each end of the line slightly toward you. The finished spool will need to be installed on the grass trimmer and continue working on the site.


Working with machinery like grass trimmers requires care and attention. For beginners and experienced mowers alike, safety precautions during work are a must. It happens that confident trimmers lose their guard, make irreparable mistakes and get seriously injured. That’s why it’s important to

  • Secure the reel cover with all latches.
  • Do not coil more line than necessary: it is too difficult to unwind later.
  • After filling the reel, always check that the tool is working correctly before mowing.
  • Choose quality material that fits the particular trimmer.

Do not try to mow coarse grass with thick stems with a fishing line. There are steel discs for this. Wear protective clothing only. Wear glasses and appropriate footwear.

Cutting unit attachment

The cutting block is the main part of the Philips Styler. It has short and sharp edges and is used for quick and precise hair length trimming.

To remove the cutting unit from the styler body, check that the release button on the body of the styler is present. If it is present, press the button to remove the cutting unit.

If the styler does not have a release button, place your finger under the teeth of the cutter block and pull it out of the appliance. To reattach, insert the lower part of the cutting block into the styler body, then slide the part with the teeth until it clicks into place. Do not use excessive force; this could damage the appliance.

If you are unable to install the cutting unit, check for foreign bodies in the body of the styler and try cleaning it with a small brush or cotton swab.

No matter how well the electric grass trimmer we have purchased works on a dacha plot or a country house. Sooner or later the time will come when we need to remove the grass trimmer head for replacement or prevention. I should say at once that you do not need to remove the trimmer head to replace the fishing line. Within this article, I will tell you how to remove or replace the entire mowing head using the example of the BlackDecker GL716 electric grass trimmer.

Tips and recommendations on how to wind a line for a trimmer and what you need to know

There are some useful tips and recommendations that will be useful to know not only for beginners, but also for the experienced masters of trimmers. These tips will help prevent negative consequences in the form of injuries and improper functioning of the mechanism. These tips state the following:

  • It is necessary to install the cover until it clicks. And it is 2 or more clicks, which depends on the number of fixtures. If one latch does not snap, the reel can jump out and injure a person when starting the tool
  • Do not wind up the line for the trimmer with a strong retraction, as well as in an amount greater than you can put it in place. It is better not to reel in the fishing line than there is more of it, as this will lead to negative consequences in the form of inability to unwind it if necessary
  • If you own the tool not with two line outputs, but with one (usually these are low-powered units), then the winding process is performed in a similar sequence as described above, only with the difference in the absence of the middle rim between the extreme bases of the spool
  • After changing the material you need to check the tool operability before starting to mow the grass. If to not make a preliminary check the scaffolding can uncoil and injure a person

This is interesting!Choose material of proper quality so as not to be injured when working with chain saws, trimmers and brushcutters. During grass mowing small stones and other materials fall under the rotating parts, which can fly long distances, so, despite the fact that the line for the trimmer is not a knife, work with the tool should be carried out in a special protective outfit. The result of the work done is the following. after the replacement of the new material, the usual one is enough for an area of up to 600 square meters, but taking into account the presence of a reinforcing layer on the line. Ordinary nylon materials do not last as long, which is important to take into account when working. Do not try to mow thick-stemmed grass with a fishing line, as special metal discs or knives are available for this purpose.