DIY trimmer repair

In detail: do-it-yourself trimmer repair from a real master for the site my.housecope.com.

An indispensable tool for a modern summer resident or owner of a private house is a petrol cutter, which allows you to effectively and efficiently put the adjacent territory in order. The period of active use of brushcutters is in late spring until October. Modern units are equipped with powerful and durable internal combustion engines, reinforced transmission and main components. Despite this, physical wear, manufacturing defects or improper operation lead to failure of the trimmer. In order to repair the trimmer with your own hands, you must have at least basic knowledge in the field of technology and little experience in repairing it.

The main unit of any gasoline tool is the internal combustion engine (ICE), which, through various methods, transmits the torque to the actuator. In a modern petrol cutter, a duralumin rod (pipe) is used as a transmission element between the engine and the trimmer head, inside which the drive shaft is located.

Thanks to the high-revving engine, the line speed can reach 13 thousand revolutions per minute, depending on the manufacturer of the scythe. In order to exclude mechanical and thermal damage to the gearbox, a special hole is provided in its housing for the introduction of grease in the form of ointments. To make the headset easier for the owner during long-term work, all brushcutter models are equipped with a durable shoulder strap.

Regardless of the manufacturer, almost every model comes with a line and steel knives.

Video (click to play).

The cross-section of PVC trimmer line can vary from 1.5mm to 3.0mm.

Made of durable polymer, it is subject to intense wear and tear during mowing and, as a result, breakage. Therefore, from time to time it is necessary to check the presence of a fishing line in the head and, if necessary, replace it. It is recommended that you purchase an extra bobbin to quickly replace it with a spool with no line.

ICE trimmers on the market today are equipped with a D-shaped, U-shaped or T-shaped handle, where the main controls of the unit are located. For example, in a braid with a U-shaped grip, the throttle key and stop / start toggle switch are located on the right grip. In the D-shaped version of the handle, the throttle control button is located directly on the rod.

Due to the presence of many components and parts, repairing a trimmer with your own hands means eliminating breakdowns that prevent its normal operation. It should be noted the most basic malfunctions of gasoline streamers:

The trimmer motor is not picking up speed;
Breakdown of the cylinder-piston group (CPG);
Ignition malfunctions;
There is no connection between the internal combustion engine and the trimmer head;
Mechanical knocking during unit operation.
Repair of the central piston group petrol cutters

The main unit of any internal combustion engine is a cylinder-piston group (CPG), which can fail due to wear of parts of parts or poor quality of the fuel mixture.

Lubrication of rubbing units in a petrol cutter is carried out by adding a certain proportion of oil to gasoline. This process can be disrupted due to old oil precipitating out. In this situation, when the trimmer is started, the motor overheats and in a matter of minutes the most expensive breakdown occurs. To eliminate the malfunction that has arisen, a complete replacement of the CPG will be required, namely: the piston, oil seals, cylinder and piston rings.If you are not an ICE repair technician and do not have experience working with technicians, then you will hardly be able to fix the engine without the help of a specialist. Details on the stages of piston trimmer repair can be found here.

If the ignition of the petrol mowers fails, the spark on the candle disappears and, as a result, the fuel mixture does not ignite.

Spit spark plug design

In this situation, it is quite important not to rush to replace the coil, since the cause of the breakdown may lie in the lack of contact in the switch on the control handle.

An important point when troubleshooting the trimmer ignition will be the diagnostics of the section, where the distance between the side and center electrodes should be 0.5-0.7 mm. In addition, it is necessary to pay attention to the steel O-ring on the spark plug, the loss of integrity or deformation of which can lead to etching of air from the combustion chamber and, as a result, reduce the power of the streamer.

Ignition flywheel with coil

If the replacement of the check of the electrical circuit, the spark plug and its contacts did not give positive results, then you should pay attention to the trimmer ignition module, namely the clearance with the flywheel. Regardless of the design features and the manufacturer of the brushcutter, the distance between the ignition coil and the flywheel should be no more and no less than 0.2 mm. To restore the optimal value of the gap, you will need to loosen the coil mounting bolts and set the trimmer ignition with a special measuring probe.

A clear sign of a malfunction of the engine power system is the absence of traces of the fuel mixture on the spark plug electrodes, which may be associated with the following defects:

Trimmer Fuel System Components

due to a clogged hole in the gas tank, a vacuum is created, which prevents the normal flow of gasoline into the carburetor;
due to the poor quality of the fuel and the ingress of foreign particles, the fuel filter installed in the tank is clogged;
non-flow of the mixture into the combustion chamber as a result of a clogged carburetor.

You can quickly determine the cause of the malfunction by dismantling the fuel hose leading to the carburetor. If the fuel mixture flows out in a thin stream, then you should pay attention to the carburetor. If there is no jet, it is necessary to clean the breather with a thin needle (a small hole in the gas tank cap) or replace the fuel filter.

If fuel enters the carburetor, it must be cleaned or adjusted. Adjusting the carburetor trimmer means restoring optimal fuel mix.

Trimmer carburetor with adjustment screws

To do this, pay attention to three adjusting screws: maximum speed (H), minimum (L) and idle speed (LA). To start the adjustment, you need to fully tighten the screws H and L and loosen one turn each. Then we start the braid and let it warm up for 10 minutes to adjust the power system in operating mode. After warming up the internal combustion engine, press the gas supply button until it stops (12,000 rpm). We restore the idling mode by unscrewing the screw LA. As soon as the trimmer head starts rotating, tighten the screw until it stops.

One of the common faults of the petrol mowers is the incorrect operation of the internal combustion engine, namely the drop in power with increasing speed (the scythe stalls).

The reason for this is that the exhaust system is clogged with burnt oil particles. Often manufacturers make mufflers prefabricated and cleaning is quite simple. If the design of the spark arrester is non-separable, then it must be placed in water with detergents, and then dried with an ordinary or industrial hair dryer. Frequent clogging of the exhaust system indicates non-observance of the proportions of oil and gasoline.

Any complex technical equipment has a limited working life. And with an increase in the intensity of its operation, the risk of its failure increases. However, it is within the power of each owner to reduce the number of such emergencies if the rules for use and maintenance recommended by the manufacturer are followed exactly. In any case, you should be prepared for the fact that at a certain period, malfunctions in the operation of the device will still arise. Malfunctions that can occur in the trimmer operation can be of a different nature. However, in some cases, it is quite possible to repair the trimmer on your own.

Equipment that operates on mains differs from similar devices that provide a built-in power drive in that it has a simpler design. The main components of a trimmer are:

mechanical part that transmits torque to the trimmer head;
electric motor;
power cable.

In this case, all the problems that may arise with this equipment can be presented in the form of the following groups.

Main function when using the device assigned to the trimmer head, in which the cutting surface is made of fishing line. In most cases, the device fails due to problems with its supply.

In case of using up the supply of fishing line, it is necessary, following the instructions of the instructions, to wind a new one.
Line entanglement may be one reason for work stoppages. In a similar situation you need to unwind it and insert a new bobbin if it shows signs of damage.
Also, the trimmer may fail due to stuck nylon thread, which may be associated with overheating of the device during its long-term use. This problem is solved by rewinding the line.
Malfunctions can be directly related to the coil: for example, the bottom of it may fall off. Repair in this case will be reduced to replacing it or creating a new bottom with your own hands. Having chosen the last option, it is necessary to prepare a piece of PCB or a bolt with a nut.
In some cases, the coil may not show signs of damage, the motor may also be fine, but the head does not rotate. In a similar situation, you should look at the drive shaft. If the fear of its breakage is confirmed, then the device must be handed over to a service center.

If the failure of the gasoline trimmer is associated with malfunctions in the mechanical part, then the repair technology will for the most part repeat the work carried out in relation to electric models.

To carry out repairs to electric trimmers, you must prepare the appropriate tools:

indicator screwdriver;
multimeter;
blowtorch.

It is rather difficult to find out by visual inspection what caused the malfunction; in most cases, only the most obvious malfunctions can be identified by eye.

Regardless of the nature of the malfunction, this in any case leads to the termination of the engine.

Equipment of this type is characterized by a more complex device, since it provides not only a drive, but also a number of other elements: gas distribution system, fuel tank and control.

Considering mechanical damage, it should be borne in mind that clogging of filters should also be attributed here. Operating requirements stipulate that they must change during regular maintenance of the device.

Extremely it is undesirable to stop the choice on models of little-known manufacturersbecause the level of their performance is often quite low. Considering that accessories for petrol trimmers are not offered in every store, it may be difficult to acquire them.

If the failure of the trimmer is associated with an inoperative engine, then in this case it will not be so easy for the owner to understand what caused the problem and how it can be eliminated. It's good if the device still has a warranty, in which case you can take the trimmer to a repair shop, whose specialists will quickly and efficiently cope with this task. Among the most frequently identified and least associated with difficulties in eliminating the causes of engine failure, the destruction of the piston rings should be called. This can be verified by removing the cylinder head and piston.

The owner of a gasoline or electric trimmer always needs to be prepared for the fact that at some point this equipment will need to be repaired. At the same time, contacting a service center is not always the right decision. Often, the causes of a malfunction can be quite simple, which can be eliminated at home. The main thing is to know where to look for it.

However, it is best not to solve such problems, but to prevent them from occurring. For this the manufacturer's recommendations for use and care must be followed exactly behind the trimmer. Then situations when you have to think about repairing a gasoline or electric trimmer will arise much less often. And this will help the owner save a lot of time, effort and money.

The use of various electrical devices greatly simplifies the performance of many types of work, but unfortunately, all complex products break down sooner or later. Failure of the electric trimmerwill lead not only to the inability to carry out work in the garden, but also to significant financial waste on repairs. It is possible to significantly save money and increase your own knowledge of the device of this technique if you do the trimmer repair yourself. Before proceeding with this type of work, you should carefully study the principle of operation of this type of household appliances.The electric trimmer consists of:

Enclosures with an electric motor.

Detachable rod.

Trimmer reel with protective cover.

Shoulder strap rivets.

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Electric trimmer device

A power cable with a plug is connected to the trimmer body, through which electric current is transmitted. In the cavity of the split rod there is a flexible shaft, thanks to which the torque is transmitted to the trimmer coil. The device is turned on by pressing the button located on the handle of the device.

This trimmer design is the most common, but

if desired, you can find products that operate on a battery, as well as with a lower location of an electric motor.

The trimmer can be damaged when working under increased stress. This situation can arise when the cultivated area is overgrown with tall grass.

When working in such areas, the engine may fail, the bearings may break, and the coil of the electric scythe will collapse. When operating in rainy or very foggy conditions, the trimmer may “burn out” as a result of a short circuit.

Damage to this electrical appliance can also occur as a result of frequent use. If the household appliance is used in this mode, then after operating a certain number of operating hours, it will be necessary to carry out mandatory repairs and preventive adjustment of many parts of the electrical appliance.

If the electric scythe does not show signs of life, then there may be a break in the electric cable inside the handle of the case, or the button for turning on the electric motor is faulty.

In order to diagnose an electrician, you will need to disassemble the handle of the electrical appliance. The work is performed in the following sequence:

The control handle is removed from the electric scythe frame.
The handle is disassembled.

When access to the inside of the electric trimmer is provided, the resistance of the electric trimmer button is measured using a multimeter. If there is no resistance after pressing, then this

the part is subject to mandatory replacement. It is also necessary to check the connection points of the power cable with the internal electrics located in the handle.

device. The contacts should be checked for open circuit with a multimeter. Often, such a malfunction can be determined "by eye". After detecting an open contact, it is enough to solder the damaged area to restore the operation of the electric trimmer.

In the absence of a multimeter, diagnostic work can be performed with an indicator screwdriver. For this purpose, connect the plug to the mains and using this diagnostic tool

find the "phase wire" and thus check the presence of electric current before and after the power button. If the phase current is detected in another electrical circuit, then it is enough to install the electrical plug on the contrary in the socket, so that the correct diagnosis can be carried out.

trimmer malfunction. The second diagnostic option should be done with great care, since there is a danger of electric shock when checking the integrity of the wiring.

If the power button of the device and the sections of the internal wiring are intact, then you should start checking the electric motor. For this purpose, it is necessary to remove the housing cover, having previously unscrewed several screws with a screwdriver.

The first thing to do after accessing the electric motor is to check that the brush assembly is working properly. If the brushes are worn out above the maximum permissible value, then the electric motor may stop completely or work unstable. In the case when the brushes and the collector are in perfect order, you should start “ringing” the motor winding. In order to eliminate the likelihood of breakage in both circuits, you should alternately carry out

checking the stator and rotor of the motor. To perform this operation, you must:

Remove the engine from the electric scythe.
Switch on the multimeter in resistance measurement mode and check all collector plates for breakage. When checking, there should also be no significant deviations in the readings of the diagnostic tool.
Check for breakdown of the rotor winding to ground. For this purpose, connect one probe of the multimeter to the rotor “ground”, and the other to any collector plate. The multimeter must be set to measure resistance over 1 MΩ. The resistance of a working motor between the winding and “ground” should be very high.
Measure the resistance value of the stator winding. If there is no resistance, then we can state in this case its malfunction.
If the stator wiring is in perfect order, then a check is made for a possible breakdown on the case, in the same way as when diagnosing the stator.

When checking in this way, it is possible in 90% of cases to establish the cause of the malfunction of the electric motor. To check for an inter-turn circuit, which can manifest itself only during the operation of the engine, thus it will not work, but such a malfunction can be diagnosed

by indirect signs, which are manifested in a decrease in the power of the electric motor and its overheating. If the electric motor is equipped with a thermal relay, then such an electric scythe, with an interturn closure, will work for a short time, after which the trimmer will automatically turn off.In some cases, the thermal relay can cause a malfunction of the trimmer motor, therefore, in a set of test

measures should be included "ringing" of the thermal relay using a multimeter or tester.

It is very simple to do this: in good condition, on a cold engine, the thermal relay passes an electric current,

In a malfunctioning state, the electrical circuit will be open.

Problems with the performance of electric scythes associated with wire breaks can be easily eliminated by soldering the contacts, but if the motor "burned out", then you will need to perform a complex rewinding process, which can

carried out by a qualified technician only. In many cases, it is much easier and cheaper to purchase a new engine and install it in place of the burned out one. This work can be done independently

in the reverse order of removal of the unit.

If the trimmer electrician is in good working order, then you should pay attention to other types of malfunctions that may appear during the operation of the electric trimmer.

If the electric motor of the device turns on, but the bobbin with the line does not rotate, the causes of such a malfunction may be the breakage of the flexible shaft transmitting the torque. This problem is especially often manifested with improper care of the electrical appliance. For example, in the absence of lubrication inside the rod of the electric cable, the cable will be exposed to excessive friction and within a short time this part will fail. For replacement, it is enough to disconnect the upper part of the electric braid, in which the electric motor is located, after which it will be possible to remove the flexible shaft from the rod.

If there are difficulties with the removal of the second part of the cable remaining in the cavity, the lower part of the spit is disconnected with the bobbin and shaft. The assembly of the mechanism is carried out in the reverse order.

Bottom trimmer

The flexible shaft must be thoroughly lubricated with grease prior to installation to reduce the chance of repeated failure of this part.

Electric scythe shaft bearing

Flexible shaft rupture can only occur on top-engine electric trimmer models.

Electric scythes with a lower engine location do not have a flexible shaft, but malfunctions of such devices can manifest themselves in the form of destruction of the bearing of the main shaft of the electric scythes on which the bobbin with fishing line is installed.

To fix such a malfunction is very simple, it is enough to replace the failed bearing with a new part.

With frequent use and improper care of the electric scythe, the listed malfunctions can appear with enviable regularity. To minimize the likelihood of breakage, it is enough not to overload the device, lubricate rubbing parts in time and do not work in high humidity. Despite some restrictions when working with this device with an electric trimmer, unlike petrol trimmers, there can be no malfunctions in the ignition unit. And such a malfunction as: "the trimmer motor immediately stalls", in principle, can not be. The motor of the electrical device cannot stall because it does not need to be started. To start, just press the power button, so many summer residents choose electric trimmers to care for the surrounding area.

The benzokos is one of the main tools of the summer resident, used to quickly put the land in order. Owners of private houses also purchase this tool for mowing grass in the backyard. The period of active use of petrol cutters and electric trimmers is in the summer. Before starting operation, the tool is put into working condition: rubbing parts are lubricated, the cutting attachment is changed, a fuel mixture is poured into the tank.If the engine does not start at all or stalls quickly, without gaining a sufficient number of revolutions, then you have to look for the causes of the malfunctions and eliminate the identified malfunctions. To repair a petrol brush with your own hands, you need to understand its structure and the principle of operation of the main units. This information can be found in the instructions for use, which the manufacturer applies to the garden equipment without fail. Check for such a guide when purchasing your chainsaw. The imported tool must be accompanied by instructions written in Russian.

A long tubular rod is attached to the gearbox of a two-stroke internal combustion engine. A shaft passes inside the rod, which transfers torque from the gasoline engine to the cutting mechanism. The line or knives rotate at 10,000 to 13,000 rpm. There are holes in the protective housing of the gearbox, into which grease is injected with a syringe. For the convenience of using the tool, the manufacturer equips it with a special adjustable shoulder strap.

A cutting attachment is attached to the brushcutters:

The line, which varies in thickness from 1.6 to 3 mm, is located in the trimmer head. The line is subject to wear during mowing. Changing the line is quick and easy in two ways: by winding a line of the same diameter onto a bobbin or by installing a new spool with line already wound.
Steel knives with double-sided sharpening for the benzokos for clearing the area from weeds, small bushes, hard grass. Knives differ in shape and the number of cutting surfaces.

On the U-shaped, D-shaped or T-shaped handle, which is attached to the boom, there are the petrol cutter control levers. The cutting mechanism is protected by a special casing. Household brushcutters are filled with a mixture prepared from gasoline and oil, which is poured into the fuel tank. The device of semi-professional and domestic brushcutters, equipped with a four-time gasoline engine, is slightly different. The filling scheme is also different: oil is poured into the crankcase, and gasoline is poured into the tank.

The measured piece of fishing line is folded so that one end is 15 cm longer than the second.We put the loop into the slot on the spool and start winding in the direction indicated by the arrow

If you cannot start the petrol cutter, then the first step is to check the presence of fuel in the tank and its quality. For refueling the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which should not be lower than AI-92. Saving on cheap fuel can lead to a breakdown of the cylinder-piston group, the repair of which can take a third of the cost of the brushcutter itself. It is equally important and correct to prepare the fuel mixture from gasoline and oil. The proportional ratio of these components of the mixture is indicated by the manufacturer in the manual. It is not necessary to prepare the fuel mixture in large volumes, since its properties are lost during long-term storage. Better to use a freshly prepared mixture.

When preparing the fuel mixture, pour oil into gasoline using a medical syringe, which allows you to accurately observe the required proportion of components

A dirty fuel filter in the tank can also prevent the brushcutter from operating. Therefore, if problems arise with starting the motor, check the condition of the filter. Replace the filter if necessary. Do not leave the inlet pipe without a fuel filter.

The air filter also needs to be checked. When contaminated, the part is removed, washed in gasoline in the field and put in place. In the country or at home, the filter can be washed in water using detergents. After that, the filter is rinsed, wrung out and dried. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture.Excess oil is removed by squeezing the filter with your hands. Then the part is installed in place. The removed cover is put back and secured with screws.

The air filter, washed in a fuel mixture, wrung out and dried, is installed in place in a plastic case and closed with a lid.

You can see how this procedure is done in more detail in the video:

If all of the above procedures are carried out, and the engine does not start, then adjust its idle speed by tightening the carburetor screw. In the video posted at the beginning of the article, attention is paid to this issue.

Place the tool on its side with the air filter at the top. This arrangement of the chainsaw ensures that the fuel mixture hits the bottom of the carburetor. The engine will start on the first attempt if you remove the air filter and pour a few drops of the mixture into the carburetor before starting, then reinstall the dismantled parts. The method has been tested in practice.
If the first tip doesn't work, then the problem is most likely in the spark plug. In this case, unscrew the plug and check its functionality, and also dry the combustion chamber. Replace the candle that does not show signs of life with a new one.
If the spark plug is in good working order, the filters are clean and the fuel mixture is fresh, then you can use the universal method of starting the engine. Close the carburetor choke and pull the starter handle once. Then open the choke and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.

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Some pull the handle with such force that they have to repair the starter of the petrol cutter with their own hands. This is only possible if the cable breaks or the cable handle breaks. In other cases, it is recommended to replace the starter. This unit is sold assembled.

Stop the engine and wait for it to cool down.
Disconnect the high voltage wire from the spark plug.
Unscrew the part using a special wrench.
Inspect the spark plug for replacement. The part changes if it is faulty, heavily soiled, has a crack on the case.
Check the electrode gap. Its size should be 0.6 mm.
Tighten the new spark plug inserted into the engine with a wrench.
Install the high-voltage wire to the center electrode of the spark plug.

As you can see, there is nothing super complicated in this procedure.

A new spark plug for a two-stroke internal combustion engine of a gasoline streamer is installed to replace the old part that is out of order

After starting, the engine may stall if the carburetor is incorrectly tuned or misaligned. What are the signs that you can understand that the reason really lies in this? It is very simple, by the vibrations that will be clearly felt when the mower is running. You can adjust the fuel supply with your own hands by following everything that is written in the operating instructions for the tool.

The engine may stall due to a clogged fuel valve. The cause is eliminated by cleaning it. If the brushcutter starts up and then suddenly stalls, it means that the fuel supply to the carburetor is difficult. Loosen the carburetor valves to ensure that the correct amount of fuel can flow to it.

Excessive air intake can also stall the engine. Increase engine revs to allow air bubbles to escape faster from the unit's fuel system. Also, be sure to check the integrity of the fuel intake hose. If you find mechanical damage (cracks, punctures, etc.), replace the part.

During the period of operation of petrol cutters, monitor the condition of the engine cooling system. The channels in the starter housing and the cylinder fins must always be clean.If you ignore this requirement and continue to operate the brushcutter, you can damage the engine due to overheating.

Competent care of the gasoline scythe during operation allows you to use it for several seasons in a row without major repairs

Allow engine to cool before cleaning. Take a soft bristled brush and clean the outside of the dirt. Cleaning of plastic parts is carried out with solvents, including kerosene, or special detergents.

At the end of the summer season, the brushcutter must be prepared for long-term storage. For this, the fuel mixture is drained from the tank. The engine is then started to use up fuel residues in the carburetor. The entire tool is well cleaned of contamination and goes to "hibernation".

As you can see, it is possible to repair the faults of a household petrol cutter on your own. It is worth contacting service departments in case of serious breakdowns. In this case, the cost of repairs should be correlated with the price of a new petrol cutter. It may be more appropriate to buy a new instrument.

The active operation of garden equipment leads to an early failure of individual units or parts. There is no need to dispose of the equipment, as it may still be useful in the future. After all, having sometimes carried out a small repair of the lawn mower with your own hands, you can return it to its previous working state.

Depending on the area of the lawn and the growth of the grass on it, the owners choose the technique that is optimal in terms of characteristics. It can be of several types:

gasoline devices;
units with an electric motor;
battery-powered equipment.

The mower of an average price can withstand the climatic conditions of St. Petersburg, Moscow or similar regions for about four seasons. More expensive or less exploited garden helpers are able to withstand 5-6 seasons in the field.

Also, the restoration of lawn mowers with your own hands will be required if the winter storage conditions turned out to be inappropriate. For example, work surfaces were not cleaned after use or there was no off-season preventive maintenance. As a result, various problems appear:

frequent sharpening of lawn mower knives is required;
the lawn mower just won't start;
the engine starts, but after a short time the mower stalls;
malfunctions appear at the carburetor, which requires not only disassembly, but also cleaning and repair;
DIY lawn mower repair is required with a significant decrease in power during operation.

You shouldn't go to an expensive service center. Many problems can be solved with minimal costs and repairs can be carried out on their own.

The cutting elements must be cleaned after each use. Change oil regularly and carry out maintenance to minimize the risk of damage.

VIDEO: How to lubricate a brushcutter or trimmer gearbox

Mowers, inside which the electric motors are located, most often begin to be capricious due to the oxidation of the contacts. The terminals are covered with a layer of scale from excess moisture in the room or in another storage location. It is also worth checking the absence of wire breaks in problem areas. A multimeter or other type of tester is used for this operation.Dismantling the Electric Lawn MowerWhen a set of garden equipment contains a brush motor, then we identify the operability of the movable unit. Brushes can wear out quickly, resulting in a lack of contact. A repair kit with them costs relatively little, and it is easy to find it in specialized stores where they sell spare parts for such equipment.Malfunctions lie in wait for asynchronous motors. Phase-shifting capacitors fail in them. A similar situation is problematic to diagnose at home. It can be identified by indirect symptoms:

a humming sound is heard;

at the start, the body twitches slightly;

there is a significant heating of the motor even at low load;

turnover decreases.

It is worth diagnosing the state of the toggle switch / button and supplying voltage to the electric motor. When the described nodes have been tested, and no malfunctions have been found, it is unlikely that it will be possible to fix the breakdown of the lawn mower with your own hands. Then you will have to use the services of a corporate service.VIDEO: The electric lawn mower does not start well, the motor jams, repair the brake clutch

TOREX combination reversible screwdriver with bits

We inspect the gaskets for breaks or burnout.If this is found, then it is necessary to ensure the tightness of the structure by replacing them with new ones. The air damper can contain carbon deposits that reduce the quality of the air / fuel mixture. You need to get rid of it by cleaning the carburetor by washing the unit in a solvent or kerosene.

Choking during operation or the lack of a set of them to enter the operating mode together with overheating of the power unit are the reasons for such events:

Violation of idle speed adjustment. You can unscrew the jets to the correct position using a screwdriver yourself. It will be possible to do this even by ear, so that the motor runs smoothly. The knives do not need to be removed, but they should not rotate.
The air filter is dirty. It is enough to remove it outside and clean, rinse. We dry naturally in the wind, without placing it near the stove or fireplace.

Use a flat screwdriver to remove the air filter cover

After removing the cover, also carefully remove the air hose

Remove the carburetor fuel chamber cover and clean it. For this, an ordinary vadashka is quite suitable, but you can also buy a special liquid.

To clean the fuel chamber, first wipe it with WD-40, then soak it for 15-20 minutes, wipe it again. This should be repeated 3-4 times to completely clean the chamber and channels.

After purging, the carburetor is assembled and returned to its place.

A clogged exhaust will result in a restriction of the exhaust flow from the exhaust pipe. Resins appear on the inner surface due to an incorrect ratio in the mixture of fuel and oil. We twist the crankshaft so that the piston goes up to the maximum and clean its surface with a wooden stick.

In more serious cases, it is recommended to contact the service under warranty. Otherwise, non-professionalism will bring more breakdowns. Moreover, if you independently search for faults and repairs during the warranty period, the warranty will expire.

VIDEO: Instructions for disassembling and cleaning the carburetor using the example of BRIGGS & STRATTON

Video (click to play).