Why the petrol scythe won't start. The trimmer has stalled and the reason will not start. Troubleshooting strategy

To the owner suburban area you cannot do without a petrol cutter or trimmer. But during its operation, situations may arise when this unit for some reason stops starting. And there can be many reasons for this. Let's find out why the petrol trimmer won't start.

Why the trimmer won't start - reasons

To determine why the gasoline trimmer does not start well or stalls constantly, it is necessary to consistently check the operation of all the main components of the unit. It is especially important to do this after long-term storage of the brushcutter. So, the main reasons for this trimmer behavior are as follows:

The culprit for the fact that the petrol brush does not start may be a poor-quality oil-gasoline fuel mixture. It must be cooked strictly according to the instructions. Saving is not at all appropriate here, since it can lead to the failure of the entire piston group trimmer. Do not prepare too much fuel mixture, as excess gasoline will lose its quality over time.
You should be aware that petrol trimmers of brands such as Stihl, Husgvarna and some others will not start if they are filled with cheap petrol with a low octane number. Therefore, for such units it is necessary to use only high-quality high-octane fuel.
If the trimmer stalls immediately upon start-up, then it may have a flooded candle. In this case, you need to unscrew it and dry it thoroughly for half an hour. Then drain the excess fuel that is in the chamber, clean the spark plug from carbon deposits, put it back in place and try to start the petrol cutter.
If your new gasoline trimmer won't start, there may be a lack of spark. And this happens because the socket where the candle is located is dry and the fuel does not ignite. Moisten slightly with a few drops of gasoline threaded connection candles.
The gasoline trimmer may stall due to clogged air or fuel filters. It is best to replace such elements with new ones.
The exhaust port and breather can also become clogged. Having cleaned these trimmer elements, it will be possible to start the unit without any problems.
Another reason why the petrol trimmer won't start, even when there is a spark, may be a clogged carburetor. To clean the channels and jets, it is necessary to purge them compressed air using a compressor.
Chainsaw wet candle: why and what to do

Can be used to clean the carburetor and special rinse.
If the carburetor gaskets are worn out, replace them. And if the tightness of this device is broken, you will have to identify the faulty carburetor part and replace it.
The trimmer may not start due to wear on the piston group. However, it is better to change such parts of petrol cutters at a service center.

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What should be done if the chainsaw candle is flooded?

Most often this happens with beginners, when at the first start they pass a “cotton” on a closed air damper and continue to pull the starter handle, respectively, there is a lot of gasoline in the combustion chamber, and not enough air does not allow gasoline to ignite.

The problem is solved simply:

Use a candle key to unscrew the candle and check its condition. If the candle is wet and there is a spark, then it has been flooded. We open the air damper, turn on the switch button, squeeze the gas "all the way" and start. Excess gas should come out of the exhaust saw and the saw will start.
Use a candle key to unscrew the candle and check its condition. If the candle is wet and there is a spark, then it has been flooded. Turn the chainsaw with the spark plug hole down and turn the starter ten times, while excess fuel will flow out of the engine cylinder. Then wipe dry (ignite) the spark plug, or replace it with a new one and try to start the engine again exactly following the operating instructions. If the plug is completely dry, it means that no fuel is being supplied to the engine. And since it is in the tank, the problem is probably in the carburetor. You can draw a little mixture into the syringe, inject it into the cylinder, tighten the spark plug and try to start the engine. But if the engine starts up and immediately stalled, then the problem remains and you need to contact the service center.

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Gasoline trimmer won't start - reasons

Many gardening Tools useful and effective, but there are times when the technique refuses to work. Among them was a trimmer that can mow both a miniature lawn and huge lawns.

Reasons why the petrol trimmer won't start

There are various reasons why the petrol trimmer won't start:

The most common reason for a breakdown lies in the wrong choice of fuel. Often, overly economical users of the device fill the tank with something dubious, but not fuel with a normal octane number. Low-quality fuel that was kept in plastic canister long time, has a terrifying effect. The device, which has lost its functionality for this reason, is sent to a complete bulkhead of the mechanism.
How not to get confused if the petrol cutter does not start
There is another common situation where the petrol trimmer starts and stalls. The problem could be the spark plug or air filter. In the first case, after inspection, it will be found that the candle is "thrown". This happens even if it has been recently wiped and dried. If everything is in order with the candle, then it is worth inspecting air filter... Most often, it turns out to be oiled and needs to be replaced. If the device still refuses to start, then the problem lies either in a faulty ignition coil or in a clogged muffler.
The device can deteriorate not only due to low-quality fuel, but also due to improper handling. For example, the fuel is checked, there is a spark, but the device will not start. The reason may be a candle filled with gasoline. To correct the situation, you just need to unscrew the candle, wipe it, dry it and check for operability.
Sometimes there is such a situation - the gasoline trimmer does not start when the candle is dry. Then it is necessary to lubricate the threaded connection with gasoline. It should be slightly damp, otherwise nothing will catch on fire.
Often, the owners of the device find themselves in a situation where the gasoline trimmer does not start well when hot. Some experts claim that the problem lies in the ignition coil. Therefore, it must be changed, and the device will work. But the problem may also be engine overheating, especially if a reinforced knife of the type was connected to the device circular saw... To avoid such situations, you should carefully study the instructions, which specifically describe what types of disks can be installed.

The reasons when a new gasoline trimmer won't start can be the most commonplace, for example, inability to use the device. If the user stores it correctly, uses high-quality fuel and does not leave gasoline in the trimmer, then the unit will serve faithfully for a long time.

Usage petrol braids today it is widespread and relevant, since having good power and productivity, these tools help a person to cope with the surrounding vegetation: grass, weeds, overgrown lawns, and so on. But there are situations when the petrol cutter won't start under all circumstances. There can be many reasons for such, as well as external manifestations. For example, a working brushcutter may not start after a winter standstill, under the influence of negative seasonal conditions or in the event of internal breakdowns. It happens that the engine fills the spark plug with fuel.

Being a structure of drive and other systems, which included: a gas engine, a gear transmission, other ignition elements, a gas powered tool is constantly exposed to mechanical stresses. In most cases, they are the reasons when the petrol trimmer refuses to work. With technical experience and necessary knowledge, the KosiKosa store offers not only an opportunity at a low price, but also to hand it over to service to identify the reasons for the lack of launch and troubleshoot.

What to do if the petrol trimmer won't start

So, if a situation occurs in which brushcutter won't start before the next harvesting operation, the reasons are first found out in order to understand why it refuses to start and how to make the braid come back to life. In this case, it is necessary:

inspect the external condition, perhaps the reasons in the starter;
check if there is a spark on the spark plugs, and the start does not work, perhaps there is not enough fuel in the carburetor. Apply gas slowly at start-up so that when ignited, the hot carburetor is filled with gasoline;
if the cold trimmer does not start, you need to check the spark plugs or the correct ignition.

In any case, a breakdown, according to which the gasoline trimmer refuses to start, exists, and to solve this problem, it may be necessary to partially repair the gasoline equipment or complete it. By contacting "KosiKosa" you can get information about which of the reasons you have. Also, for renovation works we have available ignition systems, necessary spare parts, as well as other products that will be useful to the owner of the scythe.

The motocross does not start: floods a candle, after winter and other reasons

Of course, the reasons why trimmer won't start there are also other types. The technical potential of the gas engine may itself become the cause of some of them, such as:

The wear of the piston group provokes a situation in which the spark plug is always wet after being flooded with gasoline;
The same case is possible if the valve stem seals are worn out;
The hand lawnmower may not start due to moisture build-up and contact oxidation on the starting mechanisms;
Failure to start after winter is accompanied by the presence of old gasoline in the system, although other reasons are also possible.

If your 4-stroke petrol brush refuses to work for other reasons, it is better to contact the Kosi-Kos specialists. They will empirically find out the reason, the cost is indicated and the required maintenance is performed. Also, in order for the tool to return to its specified duties after service, other items can be found in the store among accessories and spare parts.

How to prevent damage to the petrol cutter and petrol trimmer

In order for your existing petrol mower to work properly for a sufficiently long time, the Kosi Kosa online store recommends that you be careful with the tool you use. Since there are many reasons why the gasoline trimmer refuses to start, compliance simple rules will help to avoid a number of situations.

Carry out technical inspection of products on time.
Refuel in the new season with fresh fuel.
Change the plugs in time, because if the plug is dry in the system and there is no ignition, then the problem may lie in this element.
Check the ignition system components for oxidation and wear, from the starting mechanism to the contact groups.
Do not overload the unit, since, for example, storm brushcutters are easily overloaded and the plant disappears immediately after shutdown.

Buying all the necessary spare parts, as well as ordering a service for repairing the starting system of a calm gasoline saw or other models, KosiKosa specialists will kindly provide information on how to take care of the product in order to prevent these situations from occurring during all future operation.

Trimmer, both electric and motorized internal combustion(ICE), is an indispensable tool in summer and autumn period for owners of summer cottages and private houses. With its help weeds, small shrubs are easily removed and the lawn is trimmed. But, like any technique, trimmers fail at the most inopportune moment. To fix the faults with his own hands, the user of this technique first needs to determine the cause of their occurrence.

With petrol cutters and electric trimmers, if you do not consider the breakdowns associated with the boom and the mowing head, malfunctions mostly occur. in the area of the engine.

Petrol trimmer breakage

Typical breakdowns of a gasoline trimmer, which the owners of this unit most often encounter, are as follows:

engine breakdown;
carburetor problems;
fuel supply problems;
muffler malfunction;
breakdown of the gearbox;
the starter has broken;
air filter problems;
the breather on the gas tank is clogged.

Malfunctions of electric trimmers

Since the device of an electric mower is much simpler than a motor trimmer, there are few reasons for its failure.

It should be noted that it is better to entrust the elimination of some of them to a specialist.

Basically, the trimmer stops working normally in the following cases:

malfunction of the electrical cable;
the control button is faulty;
burned out motor stator winding;
breakage of contact connections on the engine.

Why the petrol trimmer won't start

The reasons why the petrol trimmer stopped starting may be different, so a step-by-step diagnosis of the device is required.

Fuel tank (fuel quality)

Remember that always before starting the unit it is required to checking the availability and quality of fuel... In this case, you should not be greedy and save, as well as “be smart” about the amount of added oil. Everything must be done according to the manual attached to the device, since if the piston group fails, its replacement will cost about 70% of the total cost of the trimmer. Fill in fuel on the basis that you will completely use it up when performing work ... Gasoline remaining in the tank loses its properties after a while and can harm the engine... Therefore, do not prepare the mixture for future use and large quantities... If the brushcutter does not start well, try to drain the “old” fuel from the tank and fill it with freshly prepared mixture.

Important! Filling the machine with fuel of unknown origin is fraught with negative consequences... Gasoline must be of high quality, purchased at a gas station, and its brand must be at least AI-95.

Candle and candle channel

So you've changed the fuel, but nothing has changed, and the trimmer still won't start. In this case, it is worth checking the candle channel: whether it is throwing a combustible mixture over it. Often users translate air damper to the “OFF” position when starting, and when the engine starts, do not move it to the “ON” position, after which it stalls. Further, an attempt to restart the internal combustion engine leads to the fact that gasoline fills the candle, and the start becomes impossible. To diagnose and fix possible problem in this node, do the following.

It is necessary to unscrew the spark plug, wipe it well and dry it. When installing the spark plug in engine cylinder, it must be dry.
Drain the accumulated fuel from the combustion chamber. This is done through the hole from which you unscrewed the candle.
If there is carbon deposits on the electrodes of the candle, it must be removed either with a thin file or with a nail file.
Do not forget to set the gap between its electrodes before installing the part. The gap on the spark plug should be 1 mm. You can use a coin as a probe to check the gap.
Next, reassemble the unit, read the starting instructions and try to start the engine again.

If the internal combustion engine does not start, then you will need to check the spark. For this:

unscrew the candle;
put the cap of the high-voltage wire on it;
touch its metal part to the cylinder body (to ensure contact, you can insert a pipe wrench) as shown in the figure below;
Pull the starter cord until the engine rotates several times.

Normally, every time the piston rolls between the electrodes of the plug, a spark should slip. If there is a spark, then the reason that the internal combustion engine does not start should be looked for in other nodes of the device.

For a better understanding of the process of how to test a candle for the presence of a spark, you can use this video, where the test is shown using the example of the Soyuz petrol cutter.

If there is no spark, then at the beginning check cable connecting the candle to the coil - perhaps the reason is in him. You can call him using a tester. If an open circuit is detected, the high-voltage wire will need to be replaced.

Also, the reason that the spark disappeared may be faulty ignition coil(magneto). The picture below shows what the coil (magneto) looks like from a Patriot petrol trimmer.

To exclude a malfunction, you will need to check the trimmer magneto with a tester, namely, its primary and secondary windings. On the primary winding, the resistance should be between 0.4 and 2.0 ohms. If the device shows 0, this means that a short circuit has occurred in the winding, and if infinity is clear sign open circuit. The resistance on the secondary winding should be between 6 and 8 kOhm.

On some coils, it can reach 15 kΩ.

If your petrol brushes start poorly or immediately stalls after starting, you should pay attention to the air filter, as it can be clogged, as a result of which air does not enter the combustion chamber and the fuel does not ignite. To check if the filter has a case, remove it and try starting the engine. If it works, then the reason has been found. The filter needs to be replaced or well rinsed and dried before installation. In case you found air filter oil, it must be washed with gasoline, squeezed well and dried for at least 2 hours before reinstalling.

If, however, with the air filter removed, the unit still does not start, then it is recommended to check the fuel filter.

Fuel filter

This filter removes possible contaminants from the fuel. If it is clogged, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the intake hose, which is inside the fuel tank. To get to the filter, it is necessary to remove the plug with the tubes coming out of it.

When removing the plug, the suction hose may come off and remain in the reservoir. It is removed with tweezers.

Next, remove the old fuel filter from the hose and put the new one purchased in advance on it. You can also clean the fuel filter if you don't have a new one. The filter must be secured to the hose with a spring clip.

Place the intake tube on the plug and insert the latter into the tank.

It should be noted that on some trimmer models, the intake hose is not located on the plug, but inside the tank. You can remove it with tweezers or a hook bent from the wire.

Sapun is check valve, which is designed to equalize the pressure in the gas tank. If it is clogged and does not allow air to pass towards the tank, then a vacuum forms inside the fuel container, and the fuel ceases to flow into the carburetor. To check if the valve is working, remove the hose that goes from the reservoir to the carburetor. If gas does not flow out of the tank, then the breather is clogged.

Trimmer users often ask themselves: Where is the breather? This valve is usually located in the lid of the gas tank and looks like the following figure.

Cleaning the breather is very simple: disassemble the valve and rinse all of its components. In some petrol cutters, this valve may be located directly on the fuel tank... It will not be possible to find it right away, since it is hidden from view under the starter housing. Such a breather is cleaned with a regular needle.

The reason that the trimmer has significantly lost power, and when trying to increase engine speed, it picks up slowly, is often a clogged exhaust channel through which exhaust gases escape from the combustion chamber.

It is necessary to remove the muffler so that no fumes get into the cylinder. Next, clean the carbon deposits from the outlet.

This must be done very carefully, avoiding the ingress of carbon deposits into the combustion chamber.

After this procedure, the weak power of the machine and a slow increase in the speed of rotation of the mowing head will no longer upset you.

Insufficient compression

If the compression is insufficient, then in most cases it will not work to start the engine. To check the compression, you can use a car compressor.

What kind of compression should be? Normally, the compression should be not less than 8 kg / cm 2... Although even at 8 kg / cm 2, some engines do not have idle move and stall, since the fuel is not pumped sufficiently. If your mower does not pump above 8 kg / cm 2, you will have to check the cylinder, piston and rings.

Also, poor compression can be due to loosely screwed carburetor... Check if he is wobbling. If so, tighten the fasteners that hold it securely. Also, if the carburetor is poorly screwed on, you may notice that gasoline drips during operation.

Electric trimmer vibrates

Many mower users have noticed that after a while after the machine starts to work, it starts to vibrate strongly. On some trimmers, mainly in more expensive models, an anti-vibration system is installed in the form of shock absorbers located between the engine and the boom. But in some cases, even it does not save from strong vibration. Strong vibration in the trimmer may be due to little or no lubrication on hard or flexible shaft inside the rod of the apparatus.

Replacement rigid shaft lubrication happens as follows:

unscrew the gearbox located at the bottom of the rod;

after removing the gearbox, you will see the end of the shaft, which must be pulled to remove the part;

after removing the shaft, it must be abundantly lubricated with special grease "Shrus-4" or the usual one - "Litol-24";

apply a small amount of grease to the shaft and spread it evenly along the entire length of the part, including the splines at the ends of the rod (if they work, the shaft will have to be replaced);
after lubrication, insert the shaft back into the rod and replace the gearbox in its original place.

Flexible shaft lubrication runs like this:

unscrew and remove the mowing head;
remove the rod from the electric motor by unscrewing a couple of bolts;
pull the flexible cable out of the rod;
lubricate the entire length of the cable with grease.

This is done like this: first you need to lubricate the end of the cable, and then insert it into the rod, after which, as it moves inside the pipe, you should apply lubricant to the part and distribute it evenly over the surface. Then insert the flexible shaft rod into Electrical engine and secure it.

In the case when the lubrication did not help, and the vibration continues to appear, you will need to change the flexible shaft.

The trimmer gets very hot

Trimmer overheating can occur for many reasons:

gasoline has the wrong octane number that is indicated in the instructions for the unit;
the proportions of gasoline and oil were not observed during preparation of the fuel mixture;
the mixture of fuel and oil has been prepared for a long time (the mixture cannot be stored for more than 2 weeks);
the trimmer works over the time prescribed according to the instructions;
a low-power trimmer is used on thick and hard grass, the device works with overload and heats up quickly;
shifted towards the boom or the cassette lid has stuck.

The latter happens if you set mowing head unsuitable for the machine, or when the axle moves inward of the boom. These changes make rotation difficult, the load on the motor increases, and it overheats.

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V recent times the gasoline trimmer has acquired the status of one of the main tools in the arsenal of summer residents. And this is not surprising, because the motorized scythe allows you to quickly lead private plot in order. However, it sometimes happens that the trimmer is even cold. In such situations, you have to independently determine the cause of the malfunction. Let's figure out what to do if the trimmer won't start. The reasons that most often lead to such troubles will be discussed below.

Troubleshooting strategy

Where to start troubleshooting if the trimmer won't start? In situations where the tool stalls immediately after starting, it is worth inspecting the following units of the unit:

fuel tank;
spark plug;
fuel and air filter;
outlet channel;
breather.

It is the breakdown of the above locations that most often leads to the fact that the trimmer does not start well. Let's take a look at how to eliminate such troubles.

Checking the fuel mixture

Let's say your trimmer won't start. In this case, the first step is to check if there is enough fuel in the tank, and also to assess the quality of the fuel mixture. It is necessary to refuel the motorized unit with exclusively high-quality gasoline. It is recommended to use fuel, the grade of which is not lower than AI-95. Filling the trimmer with fuel of unknown origin not purchased from a gas station can cause frequent tool malfunctions. This can cause damage to the piston-cylinder system. In this case, repairs often exceed the cost of the device itself.

Why won't the petrol trimmer start? Improper preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual. It is highly discouraged to prepare the fuel mixture in large volumes, that is, for the future. Indeed, with long-term savings, there is a loss of the defining properties of the substance. Therefore, if the trimmer does not start, it is worth draining the old fuel and using a freshly prepared fuel mixture.

Diagnostics of the candle channel

What to do if the used fuel mixture is in good order, but still The reasons for the failure of the mechanism may lie in the excessive wetting of the spark plug channel. To diagnose and fix the problem, you need to do the following:

Unscrew the candle. Wipe it thoroughly and then dry it.
Drain off excess fuel in the chamber through the appropriate plug hole.
Clean old spark plug if there is carbon deposits on its surface. To cope with the task will allow the use of a regular ladies' nail file or a file.
When installing the element in place, set a gap of 1 mm. To check the parameter, it is enough to place any coin in the gap.
Assemble the functional block back.
Try to start the trimmer.

It is recommended to dry the candle channel for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage. What to do if the function block was serviced in accordance with the above recommendations, but the trimmer does not start, there is still a spark? In this case, it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It should only be slightly damp. Such actions should be taken to ensure ignition. After all, no matter how strong a spark the candle gives, there will simply be nothing to ignite in an absolutely dry chamber.

If, even in this case, the trimmer does not start, it is worth assessing the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (if there is a reliable connection between these elements), most likely the problem is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of wizards who will reinstall the node.

Filter check

Another common reason the trimmer won't start is if there is a blockage in the filter area. To confirm the guess, it is enough to dismantle the indicated block and try to start the unit without it. If the trimmer engine starts, most likely you will have to replace the air filter or at least thoroughly purge the old one. If there is abundant dirt on the surface of the filter element, a new mesh must be used. When resorting to such actions, do not leave the suction pipe completely without a filter. After all, haste in this case can lead to the need to repair the entire piston group of the engine unit.

Breather cleaning

Often, the engine of branded trim models stalls as a result of a clogged breather. the main task the specified component - equalization of pressure in the fuel tank. In case of contamination of the unit, a vacuum is formed here, which significantly complicates the supply of fuel. The problem can be eliminated by cleaning the breather with a regular sewing needle.

Outlet duct diagnostics

Stable trimmer performance can be compromised by build-up of dirt in the exhaust duct or blockage in the muffler mesh. This problem most often occurs during the operation of older generation trimmer models. The issue is solved by dismantling the anti-spark grid and cleaning it.

How can I prevent sudden breakage while using the trimmer?

In order for the unit to always be in a functional state, it is worth following a few simple rules:

Conduct a timely, regular technical inspection of the main mechanical components of the device.
Fill the trimmer with only fresh fuel, the quality and origin of which is beyond doubt.
After each use of the tool, check whether oxides and carbon deposits have formed on the surface of the ignition system components.
Avoid putting heavy stress on the trimmer during work.

In order for the unit to remain in working order, it is necessary to properly prepare it for storage in winter period... First of all, you should completely disassemble the instrument, and then flush and clean the constituent elements. It is also important to inspect the functional blocks for damage, if necessary, eliminating the deformation of parts, all kinds of distortions, gusts of materials.

When storing the trimmer, it is worth filling the gearbox. enough oils. Then you need to clean the air filter, partially disassemble, blow out and rinse the engine of the unit. After drying all mechanisms, the moving elements should be lubricated. To process the piston system with oils, you must first remove the spark plug. Then you need to move the piston to the extreme position, then pour a small amount of oil into the spark plug hole and rotate the crankshaft. If you do not plan to store the petrol trimmer in the off-season in the house, it is recommended to tightly wrap the engine of the unit with an oiled rag. This will avoid the development of corrosion on the surface of important parts of the mechanism.

Finally

As you can see, there is whole line reasons why the petrol trimmer may not start. However, with a serious approach to the task, the malfunctions indicated in the material are quite simply eliminated by hand. It is worth seeking help from specialists only in case of critical breakdowns. Ultimately, you should always correlate the cost self repair with the prices for servicing the unit in the workshop.

The tool, despite its small size, is a complex technical device. If you study the operating instructions, it turns out that the reasons why the petrol cutter does not start are known and removable. It is necessary to consistently eliminate the factors that make it difficult to start the tool. Usually start with more accessible nodes with an easy health check.

All the reasons why the petrol cutter does not start can be classified according to the specifics of the operation of individual units. In the service center, malfunctions are classified:

engine malfunction (piston wear, bearing malfunction, crankcase crack);
malfunction of the fuel mixture supply - clogged pores of the air filter or carburetor malfunction;
the ignition system does not work;
mechanical malfunction - leaking hoses, broken wires under the braid, ruptured pipes.

The user first needs to check if there is fuel in the tank. Start up in accordance with the instructions, with the saw on its side. Set the air damper to the “closed” position, pump up fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine is running, open the air damper. The petrol cutter does not start - we repeat the operations with the air damper slightly open.

The brushcutter cannot work for a long time. The gearbox and the motor will overheat. Mowing can be no more than 15 = 20 minutes, taking a five-minute break. On a sultry afternoon, the operating time is cut in half. When mowing weeds, sedges, the working time must be reduced.

If the launch fails, we start looking for the reason for the failure:

check the quality of the fuel;
make sure that the candle is working and the candle channel is clean;
check the cleanliness of the air filter;
make sure the fuel filter is not clogged;
check the cleanliness of the breather;
clean the outlet.

More complex causes will be found during the diagnosis of malfunctions leading to overhaul carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal halls with a loss of vacuum. Do-it-yourself petrol brush repair, if it does not start, will require patience.

The fuel mixture must be prepared with the exact proportions of gasoline and oil. In this case, you cannot use another brand of fuel. To exclude the ingress of dirt, gasoline should settle in a glass or metal dishes 2 days. Cannot be used to store fuel plastic dishes... Measure the oil accurately with a medical syringe without a needle. Use only freshly prepared mixture, do not leave unused fuel in the tank. If the engine is naughty, the brushcutter stalls, when you press the gas, the fuel may be to blame.

The petrol cutter will not start hot - press the gas trigger and pull the cord abruptly several times until the engine starts, then lower the trigger. Will not start - specialized repair is required.

Checking the ignition system, if the petrol cutter does not start, is carried out sequentially:

clean the removed candle from carbon and dirt, dry it, set a gap of 1 mm;
connect to a high-voltage wire and check for a spark by pulling the starter several times;
in the absence of a spark, check the high-voltage wire for integrity;
replace the candle;
dry the candle channel;
at the same time the operation of the ignition coil is checked, it is faulty if the working plug does not spark.

It is in the event of a malfunction of the ignition coil of the petrol cutter that does not start up hot, stalls, works intermittently.

Cleaning or replacing the air and fuel filter will ensure the proper flow of ingredients to the carburetor. The air filter can be washed in soapy water or replaced. If nylon fabric is used, it is washed, the porous felt filler is replaced. Change the fuel filter carefully without leaving the intake manifold open. Whether it is necessary to replace the air filter can be determined if the engine starts with the air cleaner removed. Whether it is necessary to change the grid on the fuel supply, if the petrol cutter does not start, a dry candle will tell you.

Breather, gas tank air inlet. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be blown out with air or cleaned with a needle. Clean the exhaust duct, remove the anti-spark screen on the muffler.

Adjustment and tuning of the carburetor

The maximum and minimum engine speed, smooth idle speed are controlled by the carburetor. The stable operation of the brushcutter depends on the amount of the supplied combustible mixture and air, their ratio. The petrol cutter will not start if the carburetor adjustment is disturbed. The procedure for adjusting the device for supplying fuel at low speed (L), high speed (H) and idle (T) is regulated by the screws of the same name:

The chainsaw should work for at least 10 minutes, since the adjustment is carried out hot.
Screw H is turned smoothly to maximum speed, then turned by ¼, counterclockwise, reducing the speed of rotation of the engine shaft.
The idle speed is adjusted with the screw T, ensuring that the scythe does not rotate.
The screw L is adjusted, at first opening the throttle to the maximum, and then smoothly decreasing the speed to stable minimum.

After adjustment, a serviceable carburetor with cleaned filters and a checked ignition must ensure the engine is running. In the event of a carburetor malfunction, after repairing it, you will need to adjust the supply system again before starting the petrol cutter.

Rare breakdowns that impede the operation of petrol cutters can be:

rewind spring failure;
Broken or stuck starter pulley
faulty starter assembly.

The most important malfunction, the elimination of which is associated with the replacement of the engine, may be the failure of the engine piston group. The cost of repairs will cost about 70% of the cost of the product. To understand the reasons why the petrol cutter does not start, the video will help:

Taking proper care of your chainsaw

There are no unnecessary phrases in the operating instructions, everything that is offered is aimed at the trouble-free operation of the petrol cutter. Cleaning of all parts after each work cycle facilitates the easy removal of uncured residues and dirt. Only the cooled nodes need to be cleaned. This technique promotes quality air cooling motor and gearbox.

For refueling, you must use fuel with the oil recommended in the instructions. If the combustible mixture is left in the fuel tank, the oil will float up and, upon start-up, will land on the damper, impairing its adjustment. The mixture can sediment and clog the fuel feed in the carburetor.

When storing the equipment for the winter, conduct an audit, lubricate the gearbox and piston system, Wrap the entire saw in oiled rags and store in a dry place.

It is impossible, it is dangerous for the tool and the health of the mower, to use a metal cable instead of a fishing line. It cuts more efficiently, but the load on the gearbox and engine increases. A worn-out piece of wire, when it comes off, flies at the speed of a bullet. Effective mowing can lead to early wear of the engine piston group. For greater efficiency When mowing, it is suggested to use an asterisk line profile.