Self-repair of lawn mowers. Repairing a grass trimmer with your own hands, common causes of breakdowns. Trimmer repair: how to restore the thread in the spark plug hole of the cylinder

To quickly and without extra effort tidy up summer cottage plot or local area, use brush cutters. Their most intensive use occurs in warm time year. Before work, preparations are made - lubrication of moving parts, checking and replacing the cutting set, refueling with the fuel mixture. Not everything always goes smoothly - the engine may not start or stall almost immediately. To identify and repair faults, look at the attached documentation. The article will discuss the repair of lawn mowers, with photos and illustrations, as well as its most common malfunctions.

Petrol mower device

The main element is the engine internal combustion, as a rule, two-stroke. Connected to it through a gearbox is a shaft that transmits force to the cutting headset and is covered by a tubular rod. The cutting part in the form of knives or fishing line rotates at high speed (10-13 thousand rpm). The protective casing has technological holes for lubricant supply. For comfortable use, the brush cutter is equipped with a belt.

There are two types of cutting elements:

• Line with a cross section of 1.6-3 mm for the trimmer head. During operation, the fishing line wears out, and either the bobbin with fishing line is replaced, or the fishing line is rewinded and replaced.
• Double-edged steel knives for cutting small bushes, or thick and dense vegetation. The difference between them is both in shape and sharpening.

The handle attached to the bar is equipped with buttons and levers for controlling the lawn mower. A protective casing is installed on the cutting mechanism.

Refueling is done into an existing tank, mixed in the required proportions with gasoline and oil, and gasoline is used with an octane rating of at least 92. Gasoline mowers with a four-stroke internal combustion engine are refueled differently - gasoline is refueled separately, and oil is poured into the crankcase separately.

It is impossible to start the engine - reasons

The first thing to do is check whether there is gasoline in the tank, and if so, what quality it is. The use of low-quality or low-octane gasoline leads to failure of the piston system. Repairing the piston engine of a lawn mower will cost almost half of it total cost. The correct proportion of gasoline and oil, given in the attached operating instructions for the tool, is also important.

Manufacturing large quantity the mixture is undesirable, since it becomes unusable over time. You should not use an old mixture that has been standing for some time.

The engine may not start if the fuel filter is seriously clogged. If it is severely clogged, it must be replaced. Do not use the trimmer with the fuel filter disconnected. The air filter may be clogged. In this case, it is washed with water and detergent and dried, or, in extreme cases, soaked in gasoline. After installation, the dried filter is moistened with the oil used in the mixture.

If after the above measures the internal combustion engine does not start, it is adjusted to idling using the screw on the carburetor.

Quick start of the brush cutter

The procedure is as follows:

• Place the lawn mower with the air filter facing up, remove it and pour a little mixture into the carburetor, and put the filter back on.
• If after the above procedure it is not possible to start the brush cutter, you need to check the spark plug. The internal combustion chamber is dried and the spark plug is replaced with a working one.
• If the spark plug is working, proceed as follows. Close the air damper on the carburetor and pull the starter handle. Open the damper and pull the handle 3-4 times. The process is repeated several times.

Spark plug malfunction - action algorithm

They act this way:

• let the engine sit to cool down;
• remove the wire from the spark plug high voltage and unscrew it with a special key;
• after inspecting the spark plug, it is replaced if it is heavily soiled, there is a crack in the body or any other malfunction;
• check the gap between the electrodes, it is ideally 0.6 mm;
• clamp the new spark plug using a special key;
• connect a high voltage wire to the spark plug.

The lawn mower stalls after starting

The probable cause of the failure is a problem in the lawn mower's carburetor. A sign of this is that the tool vibrates strongly during operation. They do this - they adjust the carburetor according to the diagram specified in the documentation.

Another reason is a clogged fuel valve. They clean it. It may be difficult to supply the mixture to the carburetor, and then the lawn mower will suddenly stall. In such cases, the carburetor valves are loosened.

When too much air enters the system, the lawn mower also stalls. It is necessary to increase the engine speed and squeeze out the air, and also check whether the fuel hose is damaged. If defects are found, it is replaced.

Timely and proper care for a lawn mower is the key to its trouble-free operation for several seasons. It is better to spend a little time on prevention than much more on repairs, not to mention wasting money.

Photo of repairing a lawn mower with your own hands

Trimmer repairs should be carried out as soon as possible when the first signs of breakdown appear, so that minor malfunctions do not lead to more serious problems. All models are characterized by the presence of such main components and structural elements : drive system (motor), transfer devices, working part (knife or fishing line), belts and handles. Failure can occur in any part, but some components fail much more often than others.

Petrol or electric powered brush cutters (like different models, from various manufacturers) differ in design and nature of the problems. Some of them can be easily eliminated with your own hands, while others will require more overhaul or contacting the service center.

The most common are breakdowns of brush cutters associated with the following structural elements:

• engine (in particular with a piston system);
• carburetor;
• barbell;
• starter (rope break, spring breakage or disengagement);
• with an ignition or fuel supply system;
• transmission mechanism (gearbox);
• filters and muffler.

Symptoms of malfunctions are as follows:

• the appearance of uncharacteristic sounds when operating the lawn mower;
• the lawn mower does not turn on, does not reach the required speed, or stalls;
• when the engine is running, the working part does not rotate or skips;
• gasoline leak;
• excessive heating of individual components.

Smaller breakdowns can also occur, which are detected without any special diagnostics:

• start button sticking;
• limiter drop;
• line break or breakage (loss of sharpness) of the knife.

Minor problems are easy to fix. Repair of a gasoline trimmer in more difficult cases will require preliminary diagnostics to find out the exact reasons. If you have the appropriate knowledge and skills in plumbing, you can fix problems yourself by replacing failed parts.

Disassembling a gasoline scythe, lubricating its parts and replacing faulty elements

To disassemble the trimmer for repair work In general, the following devices will be needed:

• screwdriver set (with different tips) and wrenches;
• small puller for removing bearings;
• special spark plug wrench;
• hammer.

In each case, you will need to disassemble individual components.

It should be taken into account that the starter (starter) in a number of models is non-separable - in this case, if there are problems with it, only replacing the element is possible. If the knot is disassembled, it can be repaired by removing and replacing the rope and spring, or installing the latter in place (when it comes out of engagement).

Disassembly and replacement of the rod

Quite often it is necessary to repair the trimmer rod. It is a structure made up of the following parts:

• a steel drive shaft having polyhedral or square splines at the upper and lower ends;
• aluminum tubes;
• a plastic bushing designed to maintain the centralized position of the drive shaft in the tube (to prevent vibration);
• a rubber shock absorber needed to connect the rod to the motor;
• steering wheel with a handle used for steering, and a stand, a belt.

Some models have a shock absorber between the steering column and the bar. All control elements(lock lever, ignition switch, gas button) are located on the handle.

A bevel bevel gear is connected to the lower end of the rod, but some lightweight models are produced without it. This is due to the fact that their rod has a curved shape, and the shaft is a flexible cable.

How to disassemble the rod and then reassemble it to lubricate the shaft or replace it is shown in detail in the video below. In the same way, replace a broken rod with a new one.

It often happens that the multi-faceted or square splines of the drive shaft “lick”, while the working mechanism does not rotate or does so with over-slip. Then the shaft is changed.

When appears knocking on the phone, you should disassemble the rod and check the condition of the bushing, and if necessary, replace it. How to properly assemble the throttle handle on a trimmer is discussed in the video below.

If there is no intact rod suitable for installation, then you can tighten the fracture site with a clamp or apply something like a splint. This measure is temporary, so you should replace it as quickly as possible.

Clutch repair

When the knife or line spins almost constantly when the engine is idling, and uncharacteristic sounds come from the front of the engine, this indicates a breakdown of the clutch. The cause is a broken spring. At the same time, the equipment mows normally.

If slipping occurs, then in addition the pads are worn out.

The trimmer clutch is repaired as follows:

• remove the cover from the muffler;
• remove the metal stand;
• then remove the cylinder and starter caps to gain access to the clutch;
• unscrew the side screws to remove the shock absorber cover;
• remove the tube from it, having previously loosened the tightening bolts;
• unscrew the clutch (shown in the photo below);

• inspect the condition of the spring, pads and bearings;
• a new spring is hooked by threading the hooks into the corresponding holes;
• To replace the pads, you need to remove the spring, and then unscrew the bolts on them.

If necessary lock the crankshaft using, for example, a rope.

Repair of gasoline engine, carburetor and gearbox

Engine problems can be caused by problems with the piston system, oil seals, and rings. To eliminate them, it is necessary remove drive motor.

Determining what exactly caused the breakdown is not easy. If there is a warranty, you should take the mechanism to a service center for diagnosis and repair. If it is not possible to turn to specialists for help, then it should be borne in mind that most often the piston rings need to be replaced. To do this, you will need to disassemble the engine and remove the piston. They do this in the following sequence:

• remove the cover of the plastic case by unscrewing the screws or squeezing the clamps;
• disconnect the rod with the crankshaft;
• remove the cylinder head;
• take out the piston and rings;
• if necessary, replace them;
• Reassemble in reverse order.

The rings should be installed carefully because they are quite fragile.

How the piston is installed and what happens replacing oil seals when carrying out engine repairs, this is clearly shown in the videos below:

With regular use, the trimmer may gearbox breaks. The gears and bearings wear out (they can also break). To prevent this from happening frequently, this unit should be lubricated regularly. The frequency is almost always indicated in the operating instructions for the model used (at least once a season). The video below can serve as repair instructions.

To lubricate the gearbox, you should unscrew the plug and simply squeeze out a suitable lubricant inside the assembly, turning the shaft.

You can only remove and clean the carburetor yourself, and also replace the gasket between it and the engine. It is quite problematic to determine the tightness of a unit at home. The main thing is to correctly assemble the equipment after repair so that the trimmer works without problems.

Common problems with electric trimmers

Electric trimmers differ from gasoline devices in a more simplified design. Conventionally, the electric scythe is divided into mechanical and electrical part . Accordingly, the same groups of problems that occur with this equipment are identified.

Most breakdowns cannot be visually detected. To do this you will need to use various devices. Visually you can determine the following:

• the integrity of the power cable is broken (the insulation is torn off it, or it is clearly broken);
• sticking or jamming of the start button;
• mechanical external damage to the brush cutter;
• problems with the cutting part;
• stopping the scythe when clogged with grass;
• plug damage.

To find out which part broke in other cases, you will need to disassemble the electric scythe and sequentially check the most likely options. At the same time, pay attention to external manifestations of deviations from normal operation devices. They help determine the cause.

Repairing an electric trimmer will require the following equipment and tools:

• indicator screwdriver;
• multimeter or tester;
• soldering iron;
• set of keys;
• screwdrivers with different bits.

Electric scythes often do not work due to reasons not directly related to them, but caused by a decrease in the supply voltage in the network or the inoperative state of the outlet used.

How to disassemble and repair an electric scythe yourself

Before disassembling and repairing an electric scythe, you should check the condition of the outlet and the voltage in the network. If its value deviates from the norms specified in the operating instructions, then you should not even try to operate the device without stabilizer, designed for the corresponding power. Otherwise, the electric motor may fail. Only after determining that the cause of the trimmer failure is directly related to it, can one begin to disassemble the mechanism for repair purposes.

Disassembly and repair of electrical parts

Disassembling the electric scythe for the purpose of repairing its electrical part is carried out in the following sequence.

The brush and bearing units are shown in the photo below.

The scythe will work without thermostat, you just need to constantly check the temperature of the electric motor yourself, periodically letting it cool down. You can also install a new similar sensor.

The electric motor start button can be checked by closing its contacts with a jumper. If the trimmer works, then the problem is clear. But this option is unsafe. Everything should be done carefully so as not to get hit electric shock. To change the button, use a screwdriver to remove it from seat and connecting wiring from the old to the new. After replacement, you need to assemble the electric scythe and then check its functionality.

Replacing brushes required if they are destroyed. In this case, it is enough to pull out the old ones from the grooves and install new ones in their place.

Connection terminals on different models trimmers are almost identical, so connecting and disconnecting wires is done the same way.

Bearing replacement is quite complex operation, because it can get stuck and not be removed from the motor shaft. It should be pulled or knocked down carefully so as not to damage the rotor or seat.

Bearing for trimmer ET1003A

When the trimmer motor fails and needs to be replaced with a new one, you should carefully remove the fan and bearings, and then install them in their original place. In terms of costs, replacement is almost comparable to purchasing a new mechanism. If you have no experience working with electric motors, it is better to entrust it to specialists.

Assembling an electric scythe

The instructions for assembling the electrical part of the brush cutter are as follows:

• install the engine by tightening the mounting screws;
• connect an electrical circuit;
• lay the wires neatly between the individual compartments in the existing recesses;
• are closing top cover, snapping the locks and screwing it in place.

After assembly, the functionality of the device is checked.

Gasoline and electric trimmers have a lot of possible breakdowns. In order for the device to be operational for a long time, it should be kept clean and in a dry place. An important point is carrying out regular preventive measures(for example, lubrication of the gearbox) and compliance with the operating rules set out in the instructions for the device. Buy better equipment high quality from well-known manufacturers.

When disassembling the mechanism, it is recommended to photograph the process step by step so as not to forget anything, and during assembly not to miss a single detail. When replacing parts, you should pay attention to the selection of suitable components: it is better to use original spare parts.

For some models, the rod consists of two parts; a coupling is used to connect them. Such devices are convenient for transportation.

We work from 9 to 21 on weekdays.

Our highly qualified technicians who repair equipment constantly participate in trainings and seminars and undergo mandatory certification. All service work is carried out using professional tools(Hazet, Snap-on, Chicago Pneumatic, Tissel, Bosch Pro). Cleaning of carburetors and engine parts is carried out in a professional ultrasonic bath VILITEK.

Attention! Our trimmer repair shop accepts any trimmers with Honda engines.

Repair stages

The trimmer may not work due to various factors. Therefore, we carry out a complete diagnosis of all parts of the lawn mower, draw up a list of upcoming work to eliminate breakdowns, and agree with the customer on the list of work, completion time and cost.

After the repair, all dismantled parts are given to the client along with the repaired equipment.

If after diagnostics it turns out that repairing the trimmer is not advisable, the client can receive a discount on the purchase new technology in our salon.

You can also contact our service center to sharpen the gas trimmer knife ( petrol trimmers, brush cutter), because this significantly affects the speed and quality of the tool, and also increases the service life of the trimmer drive gear.

Estimated cost of basic lawn mower repair work

Also in our Service Center there is a service urgent repairs, which provides for repairs in your presence, and only the cost of work increases, the cost of spare parts remains unchanged.

Some useful tips, which will help extend the life of the brush cutter:

Always run at full speed

Use only AI-92 gasoline paired with special 2-stroke oil

Gasoline must be mixed with special 2-stroke oil in the proportion described in the engine instructions

Drain the fuel mixture from the tank at the end of work, or use the mixture completely

Store the fuel mixture in a separate container for no more than two weeks.

Fresh and properly prepared fuel mixture-pledge successful work engine. Otherwise, there is a risk of damaging the engine, which will lead to exclusion from warranty service.

After finishing work, take time to clean your tool.

We are always glad to see you at our service center.

An indispensable tool for a modern summer resident or owner of a private home is a lawn mower, which allows you to effectively and efficiently put the surrounding area in order. The period of active use of brush cutters is from late spring to October. Modern units are equipped with powerful and durable internal combustion engines, reinforced transmissions and main components. Despite this, physical wear and tear, manufacturing defects or improper operation lead to failure of the trimmer. In order to repair a trimmer with your own hands, you must have at least basic knowledge in the field of technology and some experience in its repair.

The main component of any gasoline tool is the internal combustion engine (ICE), which, through in various ways transmits torque to the executive body. In a modern lawn mower, an alloy rod (pipe) is used as a transmission element between the motor and the trimmer head, inside which the drive shaft is located.

Petrol trimmer Husqvarna

Thanks to the high-speed engine, the rotation speed of the fishing line can reach 13 thousand revolutions per minute, depending on the manufacturer of the braid. In order to avoid mechanical and thermal damage to the gearbox, a special hole is provided in its housing for introducing lubricant in the form of ointments. To make it easier for the owner, the headset long work All models of brush cutters are equipped with a durable shoulder strap.

Cutting part of brush cutter

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

Trimmer cutting part

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

Made of durable polymer, during mowing it is subject to intense wear and, as a result, breakage. Therefore, from time to time it is necessary to check the presence of fishing line in the head and, if necessary, replace it. It is recommended to purchase an additional bobbin to quickly replace it with a reel that has run out of line.

Controlling a lawn mower

Types of lawn mower handles

Trimmers with internal combustion engines 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, on a U-handle braid, the throttle key and stop/start toggle switch are located on the right handle. In the D-shaped design of the handle, the gas adjustment key is located directly on the rod.

Trimmer malfunctions and how to fix them

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

1. The trimmer engine does not gain speed;
2. Failure of the cylinder-piston group (CPG);
3. Ignition faults;
4. There is no connection between the internal combustion engine and the trimmer head;
5. Mechanical knocks during operation of the unit.
6. Repair of CPG lawn mowers

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

Trimmer problems

Lubrication of rubbing units in a lawn mower is carried out by adding a certain proportion of oil to gasoline. This process can be disrupted due to old oil falling out as sediment. In this situation, when starting the trimmer, the motor overheats greatly and in a matter of minutes the most expensive breakdown occurs. To resolve the problem you will need complete replacement CPG, namely: piston, oil seals, cylinder and piston rings. If you are not an internal combustion engine repair specialist and do not have experience working with technicians, then it is unlikely that you will be able to fix the engine without the help of a specialist. You can find out more about the stages of repairing a piston trimmer here.

Trimmer ignition troubleshooting

If the ignition of a lawn mower fails, the spark on the spark plug 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 be the lack of contact in the switch on the control handle.

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

Ignition flywheel with coil

If replacement check electrical circuit, did not give candles or her contacts positive results, then you should pay attention to the trimmer ignition module, namely the gap with the flywheel. Regardless of design features and the manufacturer of the lawn mower, 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 use a special measuring probe to set the trimmer ignition.

Gasoline trimmer fuel system

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

Components fuel system trimmer

• 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;
• failure of the mixture to enter the combustion chamber as a result of carburetor clogging.

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 (a small hole in the gas tank cap) with a thin needle or replace the fuel filter.

Carburetor repair

If fuel enters the carburetor, it must be cleaned or adjusted. Adjusting the trimmer carburetor involves restoring optimal mixing of the fuel mixture.

Carburetor trimmer with adjustment screws

To do this, pay attention to three adjusting screws: maximum speed (H), minimum speed (L) and idle speed (LA). To start setting, you need to completely tighten screws H and L and loosen 1 turn each. Then we start the scythe 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 button all the way (12,000 rpm). We restore the idle speed by unscrewing the LA screw. As soon as the trimmer head begins to rotate, you need to tighten the screw until it stops.

Gasoline scythe exhaust system

Trimmer Exhaust System

One of frequent malfunctions lawn mowers are caused by incorrect operation of the internal combustion engine, namely a drop in power when the speed increases (the scythe stalls).

The reason for this work is that the exhaust system is clogged with particles of burnt oil. Manufacturers often make mufflers prefabricated and cleaning is quite simple. If the design of the spark arrester is non-removable, then it must be placed in water with detergents, and then dried with a regular or industrial hair dryer. Frequent clogging exhaust system indicates non-compliance with the proportions of oil and gasoline.

Repairing lawn mowers with your own hands: breakdowns and methods for eliminating them was last modified: June 25th, 2018 by Administrator

A petrol mower is one of the main tools of a summer resident, used to quickly bring land plot in order. Owners of private houses also purchase this tool for mowing grass in their gardens. The period of active use of lawn mowers and electric trimmers occurs in the summer. Before use, the tool is brought into working condition: the rubbing parts are lubricated, the cutting set is changed, and the fuel mixture is poured into the tank. If the engine does not start at all or stalls quickly without gaining enough revolutions, then you have to look for the causes of the problems and eliminate the identified problems. To repair a lawn mower with your own hands, you need to understand its structure and the operating principle of its main components. This information can be found in the operating instructions supplied with the garden equipment by the manufacturer. mandatory. Check for such a manual when purchasing a chainsaw. An 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. Inside the rod there is a shaft that transmits torque from the gasoline engine to the cutting mechanism. The line or knives rotate at a speed of 10,000 to 13,000 rpm. The protective housing of the gearbox has holes into which lubricant is injected using a syringe. For ease of use of the tool, the manufacturer equips it with a special adjustable strap that is thrown over the shoulder.

The cutting accessories are included with the lawn mowers:

• The fishing line, the thickness of which varies from 1.6 to 3 mm, is located in the trimmer head. When mowing grass, the line wears out. Changing fishing line is done quickly and easily in two ways: by winding fishing line of the same diameter onto a spool, or by installing a new spool with already wound fishing line.
• Steel knives with double-sided sharpening for trimmers for clearing the area of ​​weeds, small bushes, and coarse grass. Knives differ in shape and number of cutting surfaces.

A U-shaped, D-shaped or T-shaped handle attached to the bar contains the trimmer control levers. The cutting mechanism is protected by a special casing. Household brush cutters are fueled with a mixture prepared from gasoline and oil, which is poured into the fuel tank. The design of semi-professional and household lawn mowers equipped with a quadruple gasoline engine is slightly different. The refueling scheme is also different: oil is poured into the crankcase, and gasoline into the tank.

The measured piece of fishing line is folded so that one end is 15 cm longer than the other. We insert the loop into the slot on the reel and begin to wind in the direction indicated by the arrow

What to do if the engine does not start?

If you cannot start the lawn mower, then the first thing you need to do is check the presence of fuel in the tank and its quality. To refuel the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which must be at least AI-92. Saving on cheap fuel can lead to breakdown of the cylinder-piston group, the repair of which can cost a third of the cost of the brush cutter itself. It is equally important to properly prepare the fuel mixture of gasoline and oil. The proportional ratio of these mixture components is indicated by the manufacturer in the manual. You should not prepare the fuel mixture in large volumes, as its properties are lost during long-term storage. It is 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 maintain the required proportion of components.

A dirty fuel filter in the tank can also interfere with the operation of the trimmer's engine. Therefore, if you have problems starting the engine, check the condition of the filter. If necessary, replace the filter. Do not leave the inlet pipe without a fuel filter.

Also needs checking air filter. If the part becomes dirty, remove it field conditions washed in gasoline and put in place. At the dacha or at home, the filter can be washed in water using detergents. After this, 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. The part is then installed in place. The removed cover is put back and secured with screws.

The air filter, washed in the 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 have been carried out, but the engine does not start, then adjust its idle speed by tightening the carburetor screw. The video posted at the beginning of the article focuses on this issue.

So, in order:

1. Place the tool on its side so that the air filter is at the top. With this arrangement of the chainsaw, the fuel mixture reaches exactly the bottom of the carburetor. The engine will start on the first try if you remove the air filter before starting and pour a few drops of the mixture into the carburetor, then install the dismantled parts in place. The method has been tested in practice.
2. If the first tip does not work, then most likely the problem is in the spark plug. In this case, unscrew the spark plug and check its functionality, and also dry the combustion chamber. Replace a spark plug that shows no signs of life with a new one.
3. If the spark plug is in good condition, the filters are clean and the fuel mixture is fresh, then you can use in a universal way starting the engine. Close the carburetor choke and pull the starter handle once. Then open the throttle and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.

Some people pull the handle so hard that they have to repair the lawnmower starter themselves. 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.

How to properly replace a spark plug?

The work order is as follows:

• Stop the engine and wait until it cools down.
• Disconnect the high voltage wire from the spark plug.
• Unscrew the part using a special key.
• Inspect the spark plug for replacement. The part is replaced if it is faulty, heavily soiled, or has a crack in the body.
• Check the gap between the electrodes. Its value should be 0.6 mm.
• Tighten the new spark plug inserted into the engine with a wrench.
• Complete the installation high voltage wire to the central 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 scythe is installed to replace an old part that has failed

Why does the lawn mower stall after starting?

After starting, the engine may stall if the carburetor is incorrectly configured or misadjusted. By what signs can we understand that the reason really lies in this? It’s very simple, based on the vibrations that will be clearly felt when the mower is operating. You can adjust the fuel supply yourself 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 can be eliminated by cleaning it. If the lawn mower starts up and then suddenly stalls, it means that the supply of fuel to the carburetor is obstructed. Loosen the carburetor valves to ensure free flow of fuel in the required quantity.

Excessive air leaks may also cause the engine to stall. Increase engine speed so that air bubbles leave the unit's fuel system faster. Also be sure to check the integrity of the fuel intake hose. If found mechanical damage(cracks, punctures, etc.), replace the part.

How to clean and store the instrument?

During the operation of the lawn mower, monitor the condition of the engine cooling system. The channels in the starter housing, as well as the cylinder fins, must always be clean. If you ignore this requirement and continue to use the brush cutter, you can damage the engine due to overheating.

Proper care of a gasoline scythe during operation allows it to be used for several seasons in a row without major repairs.

Allow the engine to cool before cleaning. Take a soft bristle brush and scrub away any dirt from the outer surface. Cleansing plastic parts produced with solvents, including kerosene, or special detergents.

At the end of the summer season, the lawn mower must be prepared for long-term storage. To do this, the fuel mixture is drained from the tank. Then the engine is started to exhaust any remaining fuel in the carburetor. The entire instrument is thoroughly cleaned of dirt and sent to “hibernate.”

As you can see, you can repair malfunctions of a household lawn mower entirely on your own. IN service departments should be contacted in case of serious damage. In this case, you should compare the cost of repairs with the price of a new lawn mower. It may be better to buy a new tool.