Trimmer loses speed and stalls

Troubleshooting methods

The first three reasons are fairly easy to eliminate. If the matter is in the mixture, you need to pour out the old fuel from the tank, prepare a new emulsion from high-quality gasoline and engine oil (if your engine requires a mixture) and pour it into the fuel tank. If the trimmer is running on clean gasoline, it’s even easier.

In the second case, it is necessary to carefully free the trimmer parts from the wound grass.

If the filter is clogged, you can try rinsing it. If this procedure does not bring any effect, replace it with a new one.

The last reason a lawn mower doesn’t work properly will require a little more knowledge and skill from you.

To properly adjust the carburettor for lawn mowers, a specific procedure must be followed. First, clean the air filter thoroughly. The easiest way is to rinse it (it is advisable to douse the filter with water regularly after 9-10 hours of operation).

After that, in the diagram of your trimmer, which is in the instruction manual of the device, find the adjustment screws. There are usually three of them: the first is responsible for fuel supply, the second is for idling, and the third is designed to limit the number of maximum engine speed.

Next, turn on the unit and wait for the engine to warm up.

Tighten the first (fuel mixture) adjusting screw slowly. Catch the moment when the motor starts to stall and turn the propeller back 45 degrees. If you did not have time and the motor stalled, the screw should be turned 90 degrees. Open the throttle and watch the revs increase. Next, slowly unscrew the screw (each turn is the same 45 degrees) until the moment when, at full throttle, the engine begins to firmly give out maximum revolutions.

The second screw, as mentioned above, controls the engine idle speed. By loosening it, you decrease the number of revolutions, while twisting it, you increase it. The screw needs to be adjusted so that the motor runs reliably at low revs. For better starting, speed up the engine slightly. At the same time, make sure that the motor rotates several tens of times before starting the movement of the knives / line reel. If the engine starts poorly, tighten the screw a little.

After you have adjusted the first two screws, test the operation of the unit at maximum engine speed. If necessary, you can limit it (maximum). this will protect the motor from “boiling”. To do this, you need to tackle the third screw. Unscrew the locking nut until the adjusting screw can be safely turned. To increase the maximum number of revolutions, the screw must be loosened, to decrease. on the contrary, tighten. Fix the position of the screw with a nut. Test the motor again.

Check the position of the screws regularly. the high vibration levels of lawn mowers can cause them to move unintentionally.

Remember that carburetor adjustment is not a final procedure. During the operation of lawn mowers, you will most likely have to tinker with it more than once, because an unbalanced carburetor means both increased fuel consumption and a quick failure of the candles, not to mention a decrease in the power and performance of the device.

Causes

Trimmers are reliable and durable (provided they are properly maintained, of course). Most often, malfunctions occur due to contamination of structural elements.

If the motor of your lawn mower does not start, does not pick up speed, does not reach the power you need, or suddenly stalls, the reason may be:

  • low-quality fuel (fuel mixture), the case may be in long-term storage or in non-compliance with the recipe for preparing the mixture;
  • grass is wrapped around the shaft of the fishing line / knife;
  • clogged air filter / muffler;
  • unbalanced carburetor.

The gasoline trimmer is not gaining momentum: the reasons and features of the repair

It is not necessary to purchase an expensive and bulky lawn mower to cut grass on a small lawn; it can be easily replaced by a gasoline / electric trimmer. The device of these machines is quite simple, they are easy to use and unpretentious in maintenance. But sometimes problems do occur. One of them. when the trimmer does not develop the maximum number of revolutions. will be discussed in this article.

Little tricks

  • If you are unable to tighten / loosen the adjusting screws properly, it may be that the spring is too thick and stiff. Then you can choose instead of her a more suitable.
  • If your unit does not need pure gasoline, but its mixture with engine oil, strictly observe the proportions specified in the operating instructions. There is one little thing: the recommended ratio is 1: 25 (for all brands of oil) or 1: 50 (for “native” oils). Try the first ratio first. If, with such a recipe, oil drips appear on the motor, and a strong carbon deposit forms on the candle, reduce the proportion of oil by half. This usually helps to fade traces and reduce the amount of carbon deposits.
  • To clean the spark plug electrodes from combustion products, you can use fine-grained “sandpaper”. Wipe them down with a dry cloth first and then gently sand them with sandpaper. If the space between the body of the device and the insulator is also clogged, a regular unbent paper clip can help clean it. To do this, briefly soak the candle in diesel fuel, and then scrape off the dirt. If the blockage is small, one procedure is sufficient. In case of heavy dirt, it is sometimes necessary to repeat it several times. After complete cleaning, the candle must be wiped dry from the remaining diesel fuel, and then it can be used as directed.
  • Please note that foreign-made lawn mowers (gasoline, electric or battery) require a little more maintenance than domestic ones. In particular, many strongly recommend entrusting the adjustment of the carburetor of a two-stroke engine to professionals, especially if your purchase has not expired the warranty period.
  • And finally, one more tip: follow all the manufacturer’s recommendations for the operation and maintenance of the device. This will prolong its smooth operation.

You will learn more about what to do if the petrol trimmer is not picking up speed.

When the air damper is opened

The mower or trimmer stalls when the shutter is raised for the following reasons:

  • pumping excess air due to a cracked fuel suction hose;
  • oil seals are worn out;
  • improper functioning of the fuel and air metering unit when they are mixed.

In this case, the lawn mowers stop immediately.

Immediately after the start

The stalling of a lawn mower or trimmer immediately after the start is due to the following reasons:

  • imbalance of previously adjusted valves;
  • initially incorrect setting of the valve mechanism;
  • clogging of the fuel supply valve by deposits;
  • the hose is worn out or loosely connected.

Due to a broken fuel injection algorithm, the lawn mower or trimmer vibrates strongly during operation.

Diagnostic features

A well-posed question is already half the answer. The search for a solution will be significantly accelerated by the fact. under what circumstances a petrol trimmer or lawn mower stalls, namely:

  • immediately after the start;
  • when it has been idling for some time. after one or several minutes;
  • when you press the gas button (or knob). or shortly after starting work at high, near-maximum speeds;
  • under heavy load (for example, to prune bushes, mow dense and tall weeds);
  • when warming up in the cold. it heats up unnecessarily (the lawn mower has stalled due to overheating);
  • after opening the air damper.

Depending on which of the circumstances was clarified during the pre-diagnosis, the elimination method looks for a more specific cause of the lawn mower or trimmer malfunction.

Ways to eliminate breakage

The following works are possible on the carburetor:

  • cleaning and adjusting the fuel supply valve;
  • similar work with a valve that releases exhaust gases and vapors (after fuel combustion);
  • replacing the weaker spring on the inlet valve;
  • restoration of the tension of the carburetor cable;
  • replacing the fuel suction hose, checking and strengthening the loosened connection;
  • change of the rotary disc damper;.
  • replacement of a faulty wire or ignition coil.

The list of work carried out may also include cleaning the injectors (in a 4-stroke engine), replacing valve washers, gaskets in tank plugs, and so on.

In the process of warming up the engine

If the engine heats up too quickly, overheats. the lawn mower or trimmer works unevenly, as if in jerks. After which it will stall. The reason may be as follows:

  • boiling gasoline;
  • the ignition wire is damaged (poor insulation);
  • the coil in the ignition system has noticeably burned out, interturn short circuits have appeared.

The same heating is observed when using a rotary (rather than disc) damper.

With an increase in revolutions

If the lawn mower (or trimmer) stalls when adding engine speed. check the device for the following symptoms:

  • clogging or sticking of the valve built into the gas tank cap;
  • violation of valve adjustment;
  • malfunction of pistons and cylinders. from vibration during the operation of the scythe or trimmer, accidental blows directly during the mowing session;
  • violation of the supply of the air-fuel mixture;
  • extra pumping of air into the motor;
  • cracking of the fuel inlet hose, loosening of its connections.

When the air-fuel mixture is supplied in the required portions to the engine out of time, it burns the amount that has been delivered since the last stall, and itself stalls again.

When gassing

You press the gas. and the trimmer stops working, does not develop speed. Possible suspected causes are:

  • the carburetor setting is out of order, which appears with an increasing load on the drive itself. after its long idle time or when working in extreme conditions;
  • the fuel valve is clogged with deposits;
  • the carburetor cable is loose and sag;
  • the fuel supply hose is unnecessarily stretched, possibly torn;
  • the check valve (breather) is clogged with deposits. fuel does not flow into the fuel tank.

Important! Malfunctions in the carburetor itself give themselves away by vibration of the lawn mowers.

lawn mower stalls when you press the gas: causes and remedies

  • Diagnostic features
  • Main reasons
  • When the air damper is opened
  • Ways to eliminate breakage
  • Operating tips
trimmer, speed, stalls

a lawn mower and a gasoline trimmer are machines that do not just mow the grass, but cut it up to several times more than their counterparts with an electric motor. Once the lawn mower or petrol trimmer stalls for a while, and the mowing process immediately slows down.

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The trimmer stalls when you press the gas

Those who have lawns on their personal plot know that a trimmer is a rather useful thing that will help you quickly and efficiently tidy the lawn or clear weeds from overgrown areas. And, like any mechanism, it also often fails due to various breakdowns. One of the most common complaints from device owners is that the trimmer stalls when you press the gas. We propose to understand the main reasons for this phenomenon and identify ways to solve the problem.

the lawn mower stalls when you press the gas

Why does the trimmer stall when you press the gas?

As you can see, there are many reasons why the trimmer can stall when you press the gas. That is why it is important to monitor the condition of your assistant, check the status of all systems of the mechanism in time.

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Typically, conventional garden grass trimmers are used in conjunction with a line. But if you need to cut young growth of shrubs or trees or very tough grass, you cannot do without a disc trimmer. Read about trimmer discs in the article.

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Loofah sponge

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Ivan Kireev: shit

Igor Andreychin: Thanks for the competent review, everything is very clear and accessible !! I also took a Tatra Garden BCU-50 lawn mower for myself, I have already passed the entire section twice, I am very happy with the choice! I advise everyone! I would like to advise everyone else to buy such tools with a guarantee from the office. Since the saved UAH 200-300.

Why does the petrol trimmer stall

when buying. this is of course also money, but it can “come out sideways”

Oleksiy Berezovsky: it works for me, but only more grass, then it is not twisting but the motor is gaining speed what to do

Igor: Helped out, thanks!

92Valek: Thank you very much, I wanted to take the scythe to the master, removed this filter and started working even more powerful, thanks again

Mouse mongrel: stavte 4 prozenta (40cc) masla na liter benzina, i etoy polomki nikogda ne proizaydyot 🙂
ya 20 let rabotayu sadovnikom. obyazatelno polzuytes maslom dla 2 taktnova dvigatela

Evgeny Potkov: Thank you for sure the grid is clogged damn it suffered for a week, threw it out and all the rules!

Puppy TV: we have a problem; during operation, the mower itself picks up speed and stalls, what can it be?

Slavik Egorov: without this. complete video please upload

Bro dyaga: not gaining momentum. the net is clean and without the net the same help please

ARMENIA777nnn ARMENIA: I have a problem, after three. minute work the power drops, advise what realties.

Tovarsch Hren: Many thanks. I just have the same problem. =)))
Good luck.

Purgen Purgenov: is not gaining momentum. mesh is clean and without mesh is the same

Zheka Master: I have such a problem, you jerk-jerk the starter not to start, then you make the gas to the maximum and lift the filter flap all the way up and only then start (it works at idle) by 1 cm you lower the flap down, the revolutions grow. And if you lower the damper all the way down, then it stalls. The problem is precisely in the carburetor, because when I put the carburetor from another scythe everything is in order, so I wanted to know if it was possible to adjust its native carburetor.

sergey shchaslivy: good afternoon can your phone 0500253545

Sergey Mikheev: Probably it happens, My neighbor is trying to mow near the garage, the engine at his scythe is not spinning, I tell him why you have no smoke, electricity, a joke, he took off the exhaust and the same story, the grid is clogged, threw it out and everything went like clockwork!

BOBAH SHARAPOV: less oil in gasoline

Roman Nikolsky: Guys tell me, I bought a hamer for a lawn mower, 2 horses, worked for an hour and began to start, then there is no feeling of lack of power, as if something interferes, well, the candle gets wet, although after wiping it the motor works, but it stalls, does it work, but does not gain power, how to fix this problem.

Alex cherie:
The instructions say that once a week you need to clean this mesh.
In general, this is a very common phenomenon.

sndvc: And all because the instructions must be read, everything is written there.!

Press CTRLD to add the page to the bookmarks

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 from 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.

Adjust the carburetor referring to the trimmer operating instructions. For adjustment, it is often sufficient to loosen the tightening of 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.

At idle speed

At idle, common reasons for stopping the trimmer are as follows:

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

Replacing the air filter for lawn mowers

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 entering the system;
  • not enough fuel to operate the lawn mowers.

Trimmer starts and dies. Quick fix.

If the problem area is the carburetor, then the equipment will stop at both “cold” and “hot” start.

Why does the petrol trimmer stall

A scythe with a gasoline drive is a useful thing for owners of home gardens, 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 malfunctions are contained in the operating instructions. You should know the reasons why the trimmer stalls in order to effectively repair the device yourself.

When heated

the lawn mower often stops when it heats up. At the same time, it starts up, works “jerky” and gradually stops. This process occurs when the gasoline in the carburetor boils or the damper is installed in a rotary rather than disc type. In the latter case, the part is changed.

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

What could have broken

Problems with the lawn mower 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 determine the node where the breakdown occurred, you need to pay attention to the circumstances under which the trimmer stalls.

Immediately after wound up

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

Also, the engine stops when the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower started working at first, 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 solve the issue, which ensures free circulation of the mixture in the system.

The stoppage can also be caused by air leaks in the presence of mechanical damage to the hose (holes, cracks) that takes the fuel. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.

When you hit the gas

If the lawn mower stops when the throttle is pressed, the reasons may be as follows:.

  • The most common option is carburetor adjustment failure, which occurs when the drive is under heavy load, after prolonged inactivity of the mechanism, or when it is used in difficult conditions.
  • Clogging of the fuel valve, which is eliminated by loosening it, as a result of which gasoline begins to flow normally through the system.
  • Looseness and dangling of the cable in the carburetor. The fuel hose may also be stretched to the point of rupture due to significant stress.
  • Clogged breather (check valve), as a result of which fuel does not enter the tank.

If the problem is with the carburetor assembly, the lawn mower vibrates to recognize it. When the hose bursts or the cable is stretched, these components are replaced.

Why does the trimmer stall when you press the gas, at high and idle speeds, when heating or opening the air damper

Adjustment and tuning of the carburetor

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

Also, the engine stops when the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower started working at first, 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 solve the issue, which ensures free circulation of the mixture in the system.

The stoppage can also be caused by air leaks in the presence of mechanical damage to the hose (holes, cracks) that takes the fuel. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.

Immediately after wound up

Taking proper care of your chainsaw

There are no unnecessary phrases in the operating instructions, everything that is offered is aimed at trouble-free operation of the lawn mowers. Cleaning of all parts after each work cycle facilitates the easy removal of uncured residues and dirt. You need to clean only the cooled nodes. This technique contributes to the quality of air cooling of the engine 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 flies at the speed of a bullet when it comes off. Effective mowing can lead to early wear of the engine piston group. For more efficient mowing, it is suggested to use the “star” line profile.

lawn mower stalls

Adjustment of the carburetor, does not start well, stalls when you press the gas. MY SKYPE: ork.vitek TEL. 380979677418.

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 from the operation of the mechanism;
  • circulation problems fuel mixture;
  • suction of atmospheric air;
  • the fuel intake hose is cracked or loose.

Adjust the carburetor referring to the trimmer operating instructions. For adjustment, it is often sufficient to loosen the tightening of 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.

Grass Trimmer , ,