This article will solve the problem of the petrol brush when they stall on high revs on gas

Build your Home!

Benzokosa stalls

When purchasing a petrol cutter, you need to be prepared for the fact that, as in all other similar tools, breakdowns may also appear in it that will require repair.

But you should not immediately run to the service center and pay large sums of money to the masters who convince you of a severe malfunction in the device.

The benzokosa stalls at high revs on gas

Perhaps the more common complaint associated with petrol trimmers is: "The petrol trimmer is stalling."

Naturally, a rather severe malfunction may be a prerequisite for this. But in most cases, the situation is even simpler than it seems at first glance.

In order to cope with such a problem, first, try to figure out its causes without the help of others, because, having found out the reason, it is even easier to fight with a problem, and from time to time it even self-destructs.

In fact, the circumstances are when petrol brush stalls on high revs, there are a lot of these circumstances.

Why Chinese petrol brush not developing momentum?

Trimmer not gaining momentum, a very frequent discrepancy and of course it does not always have the usual solution.

Trimmer not gaining momentum, what to do?

1st launch of the newest petrol cutters. Removed the mesh from the muffler, began to work.

Another is the presence of faults in the power supply system.

In this case petrol brush will stall on idle... A misalignment or improper adjustment of the carburetor can lead to problems with the power system.

The misalignment can be caused by vibrations that occur during the operation of the petrol cutter.

Incorrect adjustment of the petrol cutters can be corrected simply by adjusting it in accordance with the requirements specified in the operating instructions.

In addition, sometimes gasoline trimmers can stall due to the fact that the valve located in the gas tank cap is simply clogged or stuck.

To find out, try using a scythe while loosening the gas cap.

If the device works properly in this mode, clean the valve.

Moreover, the brushcutter can stall due to poor fuel flow to the carburetor.

Why then does the device start up, you ask?

The reason for this is that at first the fuel gradually runs into the carburetor and there is enough fuel to operate at increased power.

However, then it is produced and at high speeds the engine starts to stall.

As for the carburetor, the problem here may also be that its body is too tight.

The reason that the petrol brush stalls at high speeds on gas may also be air leaks.

This refers to the possible presence of a place through which air can pass during the heating process of the engine.

Be sure to check the fuel inlet hose, among other things. The problem may be that it is loose or cracked altogether.

These are the main reasons why the petrol brush may stall.

Read the same

In recent years, the gasoline trimmer has gained the status of one of the main tools in the arsenal of summer residents. And such a situation is logical, because a motorized scythe allows you to quickly put your personal plot in order. But when ...

Benzokosa (Trimmer) KUBAN BK-4500! Short review, start, work.Trimmer, electric and brushcutter (petrolcutter) - varieties of lawn mower, agricultural manual ... Petrolcutter (Trimmer) KUBAN BK-4500! Launching Petrolcutter (Trimmer) KUBAN B ...

Increased fuel consumption and the rapid formation of carbon deposits on the brushcutter's candle when using a properly prepared fuel mixture indicate the need to adjust the carburetor. Here's how to tune trims with carburettors that have a single fuel adjusting screw.

Carburetor adjustment

Flush the air filter before adjusting the carburetor. It is recommended to rinse it after every 10 hours of operation. After that, you can start adjusting. The photo shows the PRORAB-8406 petrol trimmer carburetor as an example. The numbers indicate the adjusting screws that we will use.

PRORAB-8406 petrol trimmer carburetor adjusting screws

The purpose of the adjusting screws:

1. Fuel mixture adjustment screw.
2. Idling adjustment screw.
3. Restraint screw maximum speed.

Start a petrol cutter and wait until it warms up.

Fuel supply adjustment

Start slowly turning the fuel mixture adjustment screw until the engine starts to stall or stalls if you do not have time to catch the moment. After that, unscrew the screw a quarter of a turn if the engine has not stalled, or half a turn if it stalled. Start the stalled engine. Check by opening the throttle as the engine picks up speed. Continue to unscrew screw # 1 by a quarter of a turn until the engine starts to accelerate steadily during gas blowing. This will be the moment of the most economical stable engine operation. For the PRORAB-8406 petrol trimmer, the adjusting screws are turned clockwise, unscrewed - counterclockwise, for some other brands the petrol cutter can be the other way around.

Idle speed adjustment

We start adjusting low speed. Screw number 2 limits the return movement of the lever throttle - by wrapping it, we increase the idle speed, unscrewing it, we decrease it. Adjust so that the engine runs confidently at low revs and even a little accelerated (for better starting), but so that the line reel or knife does not rotate, and there is a sufficient reserve of revolutions before they start spinning. If the engine starts poorly, increase the revs further by idling.

Maximum speed limitation

After adjusting the fuel mixture and low speed, check how the engine of the petrol cutter will operate at maximum speed. If necessary, limit the maximum rpm to required level with a # 3 hollow screw. Loosen the retaining nut and turn in the screw to decrease the maximum RPM or turn it out to increase it. Tighten the nut after adjustment. The maximum RPM setting is necessary to protect the trimmer motor from overheating and to be able to use the start key lock to reduce right hand fatigue.

In the future, it may be necessary to readjust the trimmer carburetor. For example, if the engine starts to rev poorly when running at full load, loosen screw # 1 another quarter turn. If starting is difficult, increase idle speed. Both weather conditions and the quality of the fuel mixture can affect the operation of petrol mowers. Vibration can cause the adjusting screws themselves to turn.

Spring may interfere

My first attempt to adjust the carburetor of the brushcutter did not work, as the spring of the fuel mixture adjustment screw interfered. The factory spring turned out to be too thick in the compressed state and did not make it possible to reduce the fuel supply to the required level. I had to pick up another spring and continue adjusting after replacing it.

Fuel mixture adjusting screw with spring

In the photo above the factory spring, below the adjusting screw with the matched spring. I am writing about this because I'm not sure if this is an isolated case, and someone else may face the same situation.

From personal experience

Gas cutter or trimmer

A trimmer is a broader concept than a brushcutter (brushcutter), since it can also be electric. Petrol trimmer and a benzokos are one and the same.

Some authors claim that the trimmer is a weaker tool in contrast to the more powerful petrol cutter, which can be used for cutting bushes. Personally, I have a tool with maximum power 1.7 kW and capable, as stated in the instructions, to mow small shrubs up to 10 mm thick. The user manual is called "Petrol trimmer ...".

Fuel ratio

I read somewhere that if different proportions of the preparation of the fuel mixture are indicated in the manual for the petrol cutter and on the oil canister, the proportion indicated in the manual should be used.

For a long time he did this - excess oil flowed from the engine onto the gas tank and carbon deposits constantly formed on the candle, since the manual indicated the proportion for the run-in engine 1:25, and on the canister - 1:50. After switching to a 1:50 ratio, the appearance of oil drips stopped. The plug continued to burn, but at a lower intensity (the carburetor had not yet been adjusted).

Until now, some users of gasoline-powered tools determine the proportion of the fuel mixture "by eye". If during the preparation of the mixture the amount of oil is underestimated, after a while an extraneous sound may appear immediately after starting the engine, which gradually disappears during warming up, and the engine stops with a sharp jerk. Continued use of the trimmer in this mode will lead to its failure.

Candle cleaning

In the worst times of trimming with an unadjusted carburetor, the engine would stop starting after every tank of fuel was used. And only after cleaning the spark plug from carbon deposits it was possible to continue working.

Fine sandpaper was used to clean the electrodes, and a thin paper clip with a bent end was used to clean the space between the insulator and the body. First, the electrodes were wiped off large dirt with a rag, then they were cleaned with sandpaper. After that, the candle was dipped into diesel fuel and the moistened carbon was scraped off with a paper clip from the surfaces of the insulator, the inside of the body and between them. Then the candle was dipped several times into diesel fuel, which was then shaken off it along with the dirt. Sometimes the paper clip cleaning and rinsing procedure was repeated. After that, the candle was wiped dry and was ready for further use.

Incredibly, one tank of the fuel mixture with an unregulated carburetor can be used up in less than 10 minutes - tested in practice when the trimmer was started and operated at high speeds with maximum fuel supply (the adjusting screw was unscrewed much more than normal).

You can order vegetable and flower seeds, plant protection products and micronutrient fertilizers in the online store. Low prices and good germination according to customer reviews. Mail delivery.

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 falls on summer period... Before starting operation, the tool is brought into working condition: rubbing parts are lubricated, the cutting set is changed, a fuel mixture is poured into the tank. If the engine does not start at all or quickly stalls without gaining enough speed, 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 instruction manual, 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 an instruction written in Russian.

Long tubular bar attaches to the gearbox two-stroke engine internal combustion... A shaft passes inside the rod, transmitting torque from 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. During the mowing of the grass, the line is subject to wear. 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 site 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, the petrol cutter control levers are located. 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 fuel tank... The device of semi-professional and household brushcutters, equipped with a quadruple gasoline engine, 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

What to do if the engine won't start?

If you cannot start the petrol cutter, then the first step is to check the availability of fuel in the tank and its quality. For refueling the tool it is recommended to use high quality gasolinepurchased at petrol stations, the brand of which must 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 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

Pollution fuel filter in the tank can also interfere with the operation of the petrol cutter engine. 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, in field conditions washed in gasoline 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

How is it done this procedure in more detail you can watch 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.

So, in order:

1. 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.
2. If the first tip doesn't work, then the problem is most likely in the spark plug. In this case, unscrew the spark 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.
3. 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 start.

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.

How to replace the spark plug correctly?

The order of work is as follows:

• 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

Why does the petrol brush stall after starting?

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 during the operation of the mower. You can adjust the fuel supply yourself by doing 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 started up and then suddenly stalled, 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. Speed \u200b\u200bup the engine to get air bubbles out of the fuel system unit. Also, be sure to check the integrity of the fuel intake hose. In case of detection mechanical damage (cracks, punctures, etc.), replace the part.

How do I clean and store the instrument?

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 the engine to cool before cleaning. Take a soft bristled brush and clean the outside of the dirt. Cleaning of plastic parts is done 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 dirt and goes to "hibernation".

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

Scythe having petrol drive - this is a useful thing for owners of personal plots, lawns, and when the trimmer suddenly stalls, the work to clear the area from grass stops. The device itself is a rather complex mechanism, so there are many different reasons for its breakdown. The most common problems are contained in the operating instructions. You should know the reasons why the trimmer stalls in order to effectively repair the device yourself.

Problems with the petrol brush, due to the fact that this device does not start, are classified in a certain way by service specialists. They highlight faults with the following components of the mechanism:

• an engine in which the piston and bearings may wear out or fail, crack the crankcase;
• the fuel supply system, while the filter may be clogged or problems with the carburetor;
• mechanical damage to wires, tubes, hoses;
• ignition circuit.

To correctly identify the node where the breakdown occurred, you need to pay attention to the circumstances under which the trimmer stalls.

When you hit the gas

If, when you press the gas, the petrol cutter stops, the reasons may be as follows.

1. The most common option is carburetor adjustment failure, which occurs under significant loads on the drive, after prolonged inactivity of the mechanism or when it is used in difficult conditions.
   
2. Clogged fuel valve, which is eliminated by loosening it, as a result of which gasoline begins to flow through the system normally.
3. Loosening and drooping of the cable in the carburetor. You may also experience fuel hose stretch up to its rupture, caused by the action of a significant load.
4. Clogged breather (check valve), as a result of which fuel does not enter the tank.

If the problem is related to the carburetor unit, then it can be recognized by the appearance of vibrations of the brushcutter... When the hose bursts or the cable is stretched, these components are replaced.

Trimmer carburetor

At high revs

When the scythe stalls at high speeds, this is due to the following problems:

• clogging or sticking of the valve located on the gas tank cap;
• the carburetor is out of alignment under the influence of vibrations arising during the operation of the mechanism;
• problems with the circulation of the fuel mixture;
• suction of atmospheric air;
• the fuel intake hose is cracked or loose.

Carburetor adjustreferring to the trimmer operating instructions. For adjustment, it is often sufficient to loosen its housing. If there are problematic points with the circulation of the fuel mixture, then it can gradually enter the carburetor. After its development, the engine stalls at high speeds.

Idle

At idle, common reasons for trim stopping are as follows:

• dirt, misalignment or incorrectly adjusted carburetor adjustment;
• clogged air filter;

Replacement air filter brushcutters

Trimmer air filter

• reducing the speed of the gearbox when it heats up, which is a consequence of the use of an unsuitable fuel mixture;
• clogged throttle;

• air ingress into the system;
• not enough fuel to operate the petrol cutter.

If a trouble spot is a carburetor, then the technique will stop at both "cold" and "hot" start.

Immediately after wound up

The unit may stall immediately after starting if the carburetor is misaligned or incorrectly adjusted - this causes uneven fuel supply... The result of this is that the device vibrates distinctly. For troubleshooting, the carburetor is reconfigured, following the instructions for the mechanism.

Also, the engine stops when there is valve cloggingsupplying fuel. In such cases, it is sufficient to simply clean it. If the brushcutter first started working, but then immediately stalled, then it is possible that the fuel enters the carburetor unit with some difficulty. The weakening of the valve helps to resolve the issue, which ensures free circulation of the mixture in the system.

The stop can also be called air leaks in the presence of mechanical damage to the hose (holes, cracks), producing fuel intake. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.

When heated

The brushcutter often stops when it heats up. At the same time, it starts up, works "jerky" and gradually stops. This process occurs when gasoline in the carburetor boils either a rotary damper is installed in it, and not disk type... In the latter case, the part is changed.

It happens that the trimmer heats up if damaged ignition circuit wire or a coil. In order for the device to start working normally, parts are replaced.

When the air damper is opened

It happens that the unit stalls when the air damper is opened, normally idling. This is due to air leaks in the system caused by the presence of fuel hose cracksor problems with oil seals. The carburetor metering system may also malfunction, and the brushcutter will stop after opening the damper.

Fuel hose in carburetor

All possible reasons the fact that the petrol brush is stalling, and ways to eliminate them are contained in the following video

There are many reasons for stopping the brushcutter, but the most common malfunctions associated with its carburetor. They can arise in any case. The most problematic option is when a serious breakdown occurs, and you need to purchase new parts or change the petrol cutter.

In order for the trimmer to work normally for a long time, you must strictly follow the instructions for use. It is necessary to fill the unit with a suitable composition fuel mixture, the device should be operated under moderate load.

The best trimmer models according to buyers in 2018

Trimmer SOYUZ BTS-9252L

Trimmer Hammer MTK33LE

Trimmer PATRIOT PT 3555 ES

Trimmer Huter GGT-800S

Trimmer Interskol KB-25 / 33V

In this article, we will look at the problem why the brushcutter stalls and how to deal with this problem.

Even a very good brushcutter can have starting problems. For example, it starts up and stalls. Most likely, this indicates problems with the filters - air or fuel. If it stalls at idle, then, most likely, the brushcutter has problems with the carburetor, which overheats too quickly and can no longer cope with the formation of a high-quality air-fuel mixture.

If the trimmer stalls when you press the gas, that is, when the engine starts to run at high rpm, then this indicates a problem with the carburetor or with the fuel filter.

Problems with brushcutters with an air filter will be indicated by the fact that it stops working when the air damper is opened.

Note that the online store "Well Part" offers you for the widest assortment and for the most favorable prices.

What to do if the brushcutter starts and stalls?

Now let's look at all the problems described above in more detail.

1. The petrol brush stalls when you press the gas.

In principle, there can be a huge number of reasons why the engine of a brushcutter stops working when you press the gas. We will only consider the most common ones here.

Perhaps the air damper is just clogged. And to eliminate the problem that has arisen, it will be enough just to clean the air damper. Also, the engine stalls due to a clogged air filter. To clean it, the filter should first be washed in a solvent and then blown out with a stream of compressed air.

A similar procedure should be carried out with a clogged fuel filter, which prevents the flow of fuel in the proper volume when the engine speed is increased.

The engine can also stall for other reasons. Firstly, the spacer located between the cylinder and the carburetor has worn out, and secondly, the oil seals crankshaft began to suck in air.

2. The brushcutter stalls when heated.

We have already pointed out that in this case the problem is in the carburetor. Due to the increased temperatures, gasoline begins to boil in it, due to which the air-fuel mixture ceases to form or its quality is critically reduced.

In addition, this problem can arise due to the fact that the carburetor is equipped with a rotary valve, not a disc valve. If the problem has become chronic, then it should be solved radically - by purchasing a new carburetor with a disc damper.

3. The brushcutter starts up and stalls.

Most likely, access to the fuel tank is difficult or completely absent, due to which a low pressure zone forms in it, due to which the engine stops receiving fuel in the required amount and because of this it stops working.

4. The brushcutter stalls at idle speed.

The engine at idle speed can stall for the following reasons:

• Gearbox is too hot

  News oneNews oneNews oneNews oneNews one
  

  he got up and began to prepare a not quite normal gasoline solution, which is why the revolutions on the drum began to drop;

• Clogged carburetor;
• The carburetor is incorrectly adjusted;
• The throttle valve is dirty;
• The throttle is open, which causes too much air to enter the carburetor, which makes the air-fuel mixture lean;
• The air filter is clogged.

You will need spare parts to fix most problems, and Well Part is ready to provide them to you at the best possible cost.

What to do if the trimmer stalls when you press the gas?

So, why does the trimmer stall when you press the gas? There can be several reasons for this problem.

1. The carburetor is out of alignment after an unsuccessful wintering or after too much use of the brushcutter. The petrol trimmer runs on an air / fuel mixture prepared by the carburetor. Incorrect adjustment this mechanism prepares a lean mixture that is not able to provide the engine with enough high revs... You can understand the problem with the carburetor by the characteristic vibrations of the brushcutter.
2. You will know about a clogged fuel filter by the fact that the trimmer starts and stalls. In other words, there is enough fuel flow to start the brushcutter, but not enough to keep the engine running. It may be possible to solve the problem by loosening the valves on the filter. If not, you should wash the filter in solvents and blow it compressed air... If after that the problem is not solved, then you should purchase a new fuel filter.
3. If the engine stalls at speeds close to maximum, then there may be a problem with the breather, which regulates air access to the gas tank. When fuel is consumed too quickly, which is typical when you give gas, a rarefied pressure is formed in the gas tank, due to which the flow of fuel into the engine is reduced.
4. The engine stalls when the choke is opened. The problem, again, is associated with the carburetor, which, due to excess air, prepares a lean air-fuel mixture, which is not capable of providing engine operation.

Does the benzokos stall when hot? There is a solution!

The petrol trimmer stalls when hot - this means that there is already a certain amount of fuel in the engine to start the engine, but after 5-10 minutes of operation, it stops working. This behavior of the engine indicates a problem with the fuel filter.