Trimmer Stalls At High Speeds Cause

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.

Stop the lawn mowers in this case immediately.

Trimmer Stalls At High Speeds Cause

During engine warming up

If the engine heats up too quickly, overheats. the lawn mower or trimmer works unevenly, like a jerk. Then it stalls. 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, inter-turn short circuits have appeared.

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

Ways to eliminate breakage

By carburetor The following works are possible:

  • 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 weakening of the connection;
  • Change of rotary disc damper;.
  • Change of a faulty wire or ignition coil.

With gas

You step on the gas and the trimmer stops working, and does not develop speed. Possible Supposed Cause:

  • The carburetor setting is out of order, which appears with an increasing load on one drive. 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;
  • Forgotten by deposits a check valve (breather). fuel DOES NOT enter the fuel tank.

With increasing speed

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 impacts directly in 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, the engine burns the amount that it has received since the last stalling, and itself stalls again.

When idling

Run the trimmer or lawn mower at idle speed, you find that the device starts. but stalls, After working, say, 5-10 minutes. The reasons may be as follows:

  • Clogging, violation of carburetor adjustment;
  • Initially incorrect setting of the carburetor valve mechanism;
  • Clogging of the air filter;
  • Reduction in the speed of the gearbox (if any). incorrect ratio of the air-fuel mixture;
  • Clogging of the throttle;
  • The penetration of excess air into the fuel system;
  • Running out of fuel in the tank (and oil in the tank if the engine is four-stroke).

If there are problems directly with the carburetor, the machine will stop both after a cold start and after starting on an already running engine.

Main reasons

Possible reasons for the lawn mower or trimmer to stall when attempting to restart and resume interrupted work:

  • Engine problems;
  • Failure in the gasoline and oil supply system;
  • Damage to pipelines (capillaries, hoses, pipes)
  • Faults in the ignition system.

A general description of scythe or trim problems is not enough here. A clear and immediate repair, high-quality service is impossible without specifying the identified cause.

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 gasoline 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 soon after starting work at high, near maximum speed;
  • Under heavy load (for example, to cut bushes, mows thick and tall weeds)
  • When warmed up in the cold. heats up excessively (the lawn mower has stalled due to overheating)
  • After opening the air damper.

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 or loose.

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

Trimmer stalls: causes and troubleshooting

The lawn mower is a mobile, high-performance tool for beautifying home gardens and surrounding areas. With prolonged use, due to wear of parts or production defects, malfunctions occur, which lead to the fact that the trimmer stalls or does not start. Since this tool is a rather complex mechanism, there may be several reasons why the lawn mower stalls.

Why does the trimmer stall

There are two main ways to troubleshoot problems: transferring the braid to a specialized center or solving the issue with your own hands. The first option is suitable for those who are ready to pay a “tidy” sum to restore the unit’s working capacity, and the second one for those who have basic locksmith skills and can independently figure out the causes of breakdowns and ways to eliminate them.

Currently, it is customary to classify breakdowns for which the lawn mower stalls into the following categories:

  • Mechanical damage to the internal combustion engine crankcase, malfunctions of the cylinder-piston group (CPG)
  • Breakdowns associated with the supply of the fuel mixture (air filter, carburetor)
  • Malfunctions due to damaged tubes, hoses, cables or ignition circuit.

The lawn mower stalls at high engine speeds

During operation, a situation arises when, when you press the fuel mixture supply button, the unit turns NOT increase, but decrease. A malfunction of this nature can be caused by:

Fuel hoses for lawn mowers with filter

  • Etching atmospheric air into the combustion chamber;
  • Problems with the circulation of the fuel mixture;
  • Clogging of the breather in the fuel filler cap (cleaning the hole with a fine sewing needle)
  • Incorrect carburetor adjustment.

When air is leaking during the operation of the internal combustion engine, it is necessary to check the tightness of the connection of the pipes and the integrity of the gaskets in the CPG. The problem with the circulation of the fuel mixture can be solved by eliminating blockages in the fuel pipes leading to the carburetor. If a vacuum occurs in the tank and the fuel mixture does NOT flow to the carburetor, it is enough to clean the breather with a thin needle and blow it with air.

Read more:  Trimmer Gasoline Consumption

The lawn mower stalls when you press the gas

Gas key lawn mowers

Hole in the fuel cap (breather) of the trimmer

Lawn mowers fuel valve

With a similar problem, pay attention to the fuel valve, which, when clogged, stops passing the fuel mixture normally. The solution to this problem is to mitigate it with a suitable tool. In addition, the problem with the circulation of the fuel mixture may lie in the valve clogging. To do this, it is enough to blow it with a stream of compressed air.

Petrol trimmer stalls at idle speed

Often, when the engine speed decreases, the lawn mower engine stalls and when it is restarted the Plasma idle speed. The main reasons for such a breakdown include contamination or misalignment of the carburetor, as well as clogged air filter.

The petrol trimmer stalls when idling

If the optimal settings of the carburetor are violated, it is necessary to clean it and re-adjust it. Clogging of the trimmer air filter can be dealt with by placing it in a solution of common household detergent for several hours. If self-cleaning did not help to cope with blockages, then it is better to purchase a new filter element in accordance with the instruction manual.

After carrying out user events for a long time, he will NOT face a situation where the trimmer stalls at idle and functions only when gas is supplied.

If stalled while idling

If the lawn mower stalls while idling, there could be several factors.

  • First you need to check the prepared fuel solution when it comes to four-stroke trimmers running on a gasoline-oil mixture. There is a possibility that it was made incorrectly. the proportions are not maintained. Because of this, the gearbox heats up, and the revolutions on the drum decrease.
  • Another probable prerequisite is the clogging of elements such as the throttle valve, air filter or carburetor. Need to clean Specified parts.
  • Another possible factor is misalignment or misalignment of the carburetor. You need to re-configure according to the instructions.
  • Observe this problem mono even when opening the air damper. In this situation, the lack of fuel for the trimmer is due to the air flow.

If the device lacks fuel, it works properly at high speeds or when they increase, but stalls at idle. If the root of the problem lies in the carburetor, the mower will shut off on both cold start and hot start.

If it stalled when heated

The lawn mower often stalls when heated. It looks like this. the tool starts up, jerks (not smoothly) and quickly stalls. This situation occurs due to fuel boiling in the carburetor or an incorrectly selected valve, which should be NOT disk, but rotary. In the latter case, if an error is found, the part must be replaced.

Damaged ignition circuit wiring or a defective coil can cause trimmer to heat up. Broken knot will need to be replaced with a new one.

If stalled, did not gain momentum

If the trimmer does NOT rev up and off, there may be several reasons. The most common culprit is a clogged air filter. It must be pulled out and cleaned, if necessary, replaced.

Another possible malfunction is related to the mechanics of the motor drive. This part of the trimmer must be thoroughly cleaned and the cables located inside.

You also need to make sure that the cable in the carburetor has not slept. Before using the trimmer for the first time, check this structural element to ensure that it is firmly tensioned, but not tight. Otherwise, the cable may crack, resulting in costly repairs.

If stalled after launch

If the equipment starts and stalls immediately after starting, this indicates an incorrect setting or misalignment of the device. As a result, fuel does not enter the engine evenly, resulting in significant vibration and trim shut off. To fix the breakdown, you need to reconfigure the device according to the user’s manual.

Another probable problem is a clogged valve supplying the gasoline mixture. It needs to be cleaned.

Another possible cause is a damaged fuel intake hose. Air can enter the system through cracks and holes. To solve the problem, you need to increase the engine speed in order to get rid of air bubbles that have penetrated into the device.

If stalled under load

Sometimes the trimmer stalls under load because it cannot gain momentum. This means that the cable pulled into the carburetor is loose and sag. If there is experience in the cobs of this knot, the cable should be tightened.

Another cause of the malfunction is that the fuel intake hose is too tight. Under load, it stretches even more, as a result of which cracks are formed, as a result the part deteriorates. To eliminate the breakdown, you will need to replace this element.

If it stalled when opening the damper

If the equipment works properly at idle, but stalls when the air damper is opened, this reports in the penetration of air into the system through cracks in the fuel supply hose or in damaged oil seals. To fix the breakage and to adjust the operation of the tool without sucking air from the atmosphere, it is necessary to replace the damaged parts.

Another possible cause of failure is a malfunction of the carburetor dosage system. To fix this problem, it is better to contact professionals.

If stalled at high speeds

If the carburetor stalls at high speeds, this means that at idle and low speeds, the incoming fuel is enough for it, but not enough to work at high speeds. Then it is necessary to check the health of the following trimmer assemblies.

  • Fuel hose. This may have been compromised by cracking. In this case, a replacement part is needed. Or maybe you just need to tighten the clamps.
  • The filter mesh between the carburetor and the gasoline supply hose. it could be clogged. In this situation, it is necessary to clean the part.
  • The valve located on the gas tank cap. it could get stuck or be forgotten by debris. Cleaning is also needed.
  • Carburetor. it may be misaligned as a result of constant vibration. This is usually the case for cheap Chinese parts. To eliminate the problem, you need to configure according to the instructions. In some cases, it is enough just to loosen the tightening of the carburetor body. If the adjustment fails, a new element must be installed.
  • Additionally, the air filter should be checked. It may need to be rinsed and cleaned or replaced with a new one, as it could be forgotten by dirt and grass particles when the equipment is tilted, when the user mowed in hard-to-reach places.

Trimmer stalls. how to fix the problem

The petrol trimmer is a useful tool for clearing unwanted grass from adjacent areas and large lawns. The design of this technique is quite complex, therefore, if the device breaks down, there may be several reasons. The most likely causes of the breakdown are usually described in the user manual. Knowing why the trimmer stalls, you can try to fix the defect yourself. The most common malfunctions that provoke a stop of lawn mowers, and the possibility of repairing them with your own hands. in the material below.

Preventive measures and rules of operation

In order for the lawn mower to function properly and NOT stall when started, it must be properly stored and operated. Compliance with the following simple recommendations will allow you to forget about problems.

  • When mowing grass, you need to monitor the condition of the cooling system. It is also necessary to regularly clean the channels in the housing and the ribs of the starter.
  • Use kerosene, thinner or other detergent to clean the instrument.
  • Do not clean the hot instrument. it must cool down before washing.
  • It is important to observe the Recommended operating mode. this will avoid overheating of the engine.
  • If the spit is not used within the next thirty days, the fuel must be drained, otherwise it will break down into heavy components, which can clog the channels of the carburetor.
  • After the fuel is drained, the trimmer should idle for a while until it turns off. This will allow you to completely get rid of the remaining working mixture inside.
Read more:  How To Test The Ignition Coil On A Stihl Gas Trimmer

To store the tool in cold weather you need:

  • Completely drain the fuel;
  • Disassemble the lawn mower, wash and clean all available components;
  • Inspect the condition of the parts, eliminate all defects that can be corrected;
  • Pour the prescribed amount of oil into the gearbox;
  • Cleans the air filter;
  • Partial disassembly of the engine, wash, blow out and lubricate all moving parts;
  • For piston lubrication Unscrew the spark plug, then use the starter to raise the piston to top dead center, pour a small amount of oil into the spark plug hole and turn the crankshaft several times.

Only by observing these rules, you can be sure that the lawn mower will work properly and will no longer stall for a number of seasons.

As you can see, there are many reasons for the trimmer to stop working. Most of them can be corrected by yourself using the user manual. In cases where there is no self-confidence, it is recommended to take the equipment to repair. It is worth remembering that improper actions can cause even more harm to the trimmer. As a result, the repair of lawn mowers will cost a significantly larger amount than it would have been originally, and in the worst case, it may be necessary to purchase a new unit.

Immediately after winding up

The unit may stall immediately after starting if the carburetor is misaligned or incorrectly adjusted. this causes an 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 the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower first started working, but then immediately stalled, then the fuel may enter the carburetor unit with some difficulty. Weakening the valve helps to resolve the issue, which ensures free circulation of the mixture in the system.

A stop 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, you should add revolutions to the bit in order to quickly expel air bubbles from the system.

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;
  • Fuel supply system, while filter clogging or problems with the carburetor is possible;
  • Mechanical damage to wires, tubes, hoses;
  • Ignition circuit.

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 on clearing 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. Knowing the reasons why the trimmer stalls should be done 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 “with a jerk” and gradually stops. This process occurs when the gasoline in the carburetor boils or the damper is installed in a rotary rather than a 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.

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 a 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.
  • Clogged fuel valve, which is eliminated by loosening it, as a result of which gasoline begins to flow normally through the system.
  • Loosening and drooping of the cable in the carburetor. The fuel hose may also stretch to the point of rupture due to a significant load.
  • Clogged breather (check valve), as a result of which fuel does NOT enter the tank.

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

Idle

At idle, common reasons for trim stopping 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 ingress into the system;
  • Not enough fuel to operate the lawn mowers.

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 enough to loosen the tightening of its body. If there are problematic moments with the circulation of the fuel mixture, then it can gradually enter the carburetor. After its development, the engine stalls at high speeds.

When the air damper is opened

It happens that the unit stalls when the air damper is opened, working normally at idle speed. This is due to air leaks in the system, caused by cracks in the fuel hose or problems with the oil seals. The carburetor metering system may also malfunction, and the lawn mower will stop after opening the damper.

Fuel hose to carburetor

For all Possible causes of the lawn mower stalling and solutions, see the following

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

Lawn mower. On hot it stalls. Probable cause and remedy. Does the engine stall immediately after starting? Why is this happening

Another common prerequisite for which the trimmer will not start is a blockage in the filter area. To confirm the hypothesis, it is enough to dismantle the Designated unit and test the start of the unit without it. If the trimmer engine starts, most likely you will have to create a change of the air filter, or at least perform a painstaking purge of the old one. If there is abundant contamination of the filter element, use the latest mesh. When resorting to such actions, it is not recommended to leave the absorbing pipe completely without a filter. After all, haste in our version leads to the need to repair the entire piston group of the engine unit.

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Often the engine of branded trim models stalls when the breather is clogged. The main task of the designated component is to equalize the pressure in the fuel tank. For which the design of the contamination of the unit is intended, a vacuum appears here, which greatly complicates the supply of fuel. Removing the malfunction allows cleaning the breather with an ordinary sewing needle.

The lawn mower stalls at high engine speeds

During operation, a situation arises when, when you press the fuel mixture supply button, the unit turns NOT increase, but decrease. A malfunction of this nature can be caused by:

Fuel hoses for lawn mowers with filter

  • Etching atmospheric air into the combustion chamber;
  • Problems with the circulation of the fuel mixture;
  • Clogging of the breather in the fuel filler cap (cleaning the hole with a fine sewing needle)
  • Incorrect carburetor adjustment.

When air is leaking during the operation of the internal combustion engine, it is necessary to check the tightness of the connection of the pipes and the integrity of the gaskets in the CPG. The problem with the circulation of the fuel mixture can be solved by eliminating blockages in the fuel pipes leading to the carburetor. If a vacuum occurs in the tank and the fuel mixture does NOT flow to the carburetor, it is enough to clean the breather with a thin needle and blow it with air.

Trimmer stalls: causes and troubleshooting

The lawn mower is a mobile, high-performance tool for beautifying home gardens and surrounding areas. With prolonged use, due to wear of parts or production defects, malfunctions occur, which lead to the fact that the trimmer stalls or does not start. Since this tool is a rather complex mechanism, there may be several reasons why the lawn mower stalls.

Why does the trimmer stall

There are two main ways to troubleshoot problems: transferring the braid to a specialized center or solving the issue with your own hands. The first option is suitable for those who are ready to pay a “tidy” sum to restore the unit’s working capacity, and the second one for those who have basic locksmith skills and can independently figure out the causes of breakdowns and ways to eliminate them.

Currently, it is customary to classify breakdowns for which the lawn mower stalls into the following categories:

  • Mechanical damage to the internal combustion engine crankcase, malfunctions of the cylinder-piston group (CPG)
  • Breakdowns associated with the supply of the fuel mixture (air filter, carburetor)
  • Malfunctions due to damaged tubes, hoses, cables or ignition circuit.

The reason why the trimmer starts and stalls. Lawn Mower Starts And Immediately Deafes Reason

The tool, in spite of its small dimensions, is a complex technical device. If you study the annotation for operation, it turns out that the prerequisites why the lawn mower does not start are known and removable. It is necessary to eliminate one by one the reasons that make it difficult to start the tool. Usually start with more accessible nodes with an easy health check.

What remains for our client to do the prerequisites, why the lawn mower does not start, of course, systematize according to the specifics of the work of SEPARATE units. In a car service, malfunctions are systematized:

The user first needs to check if there is fuel in the tank. The start-up is carried out in accordance with the annotations, put the dust 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 lawn mower does not start. we repeat the operations with a slightly open air damper.

The lawn mower is not allowed to work for a long time. The gearbox and engine will overheat. Mowing is an option for less than 15 = 20 minutes, taking a five minute break. On a hot afternoon, working hours are cut in half. When mowing weeds, sedges, the working time must be reduced.

Petrol trimmer stalls at idle speed

Often, when the engine speed decreases, the lawn mower engine stalls and when it is restarted the Plasma idle speed. The main reasons for such a breakdown include contamination or misalignment of the carburetor, as well as clogged air filter.

The petrol trimmer stalls when idling

If the optimal settings of the carburetor are violated, it is necessary to clean it and re-adjust it. Clogging of the trimmer air filter can be dealt with by placing it in a solution of common household detergent for several hours. If self-cleaning did not help to cope with blockages, then it is better to purchase a new filter element in accordance with the instruction manual.

After carrying out user events for a long time, he will NOT face a situation where the trimmer stalls at idle and functions only when gas is supplied.

Trimmer ON cold does not start well, what to do?

What to do if the used fuel mixture is in perfect order, alas, as before. The petrol trimmer won’t start? The prerequisites for the failure of the mechanism are variations to cover in excess moisture to the candle channel. To diagnose and eliminate the difficulty, you need to do the following:

  • Remove the candle. Wipe it painstakingly, and then dry it.
  • Drain off excess fuel in the chamber through the appropriate plug hole.
  • Clean an old candle if there is carbon deposits on its surface. Cope with the task will allow the use of an ordinary ladies’ nail file or a file.
  • To install the element in the area, set a gap of 1 mm. To check the parameter, it is enough to place any coin in the gap.
  • Assemble the multifunctional unit back.
  • Try to start the trimmer.

It is recommended to dry the candle channel for at least half an hour. But do not resort to calcining its parts. After all, heating the spark plug leads to its final damage. What to do if the service of the multifunctional unit was performed according to the above tips, but the trimmer does not start, the spark of course with all this? Here it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It is only slightly moisturized. Resorting to such actions should be taken to ensure ignition. After all, no matter how strong a spark is given by a candle, in a completely dry chamber there will simply not be anything to ignite.

Even if the trimmer does not start here, it is worth evaluating the quality of the contact of the boundaries with a high-voltage wire and a candle. For which the design of the absence of a spark is intended (if there is a reliable connection of the boundaries with the indicated elements), for sure, a discrepancy is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of the wizards who will reinstall the node.

The lawn mower stalls when you press the gas

Gas key lawn mowers

Hole in the fuel cap (breather) of the trimmer

Lawn mowers fuel valve

With a similar problem, pay attention to the fuel valve, which, when clogged, stops passing the fuel mixture normally. The solution to this problem is to mitigate it with a suitable tool. In addition, the problem with the circulation of the fuel mixture may lie in the valve clogging. To do this, it is enough to blow it with a stream of compressed air.