The gas trimmer stalls at high speeds

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.

When idling

When you run your trimmer or lawnmower at idle, you find that the device will start. but stall after, 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). the wrong 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.

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.

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.

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

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.

The gas trimmer stalls at high speeds

When purchasing a lawn mower, you need to be prepared for the fact that, like in all other similar tools, breakdowns may also occur in it, which will require repair. However, you should not immediately run to the service center and pay a lot of money to the masters who convince you of a serious malfunction in the device.

Perhaps the most common complaint about petrol trimmers is the lawnmower stalls. Of course, the reason for this may be a rather serious malfunction. However, in most cases, the situation is much simpler than it seems at first glance. To cope with such a problem, first of all, try to figure out its causes on your own, because after finding out the cause, it is much easier to deal with the problem, and sometimes it even self-destructs.

In fact, the reasons are when the lawn mower stalls at high speeds, there are quite a lot of these reasons. Another is the presence of faults in the power supply system. In this case, the lawn mower will stall at idle speed. 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 lawn mower. Incorrect adjustment of lawn mowers can be corrected simply by adjusting it in accordance with the requirements specified in the instruction manual.

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.

over, the lawn mower 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 is sufficient 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.

Air leaks may also be the reason for the lawn mower stalling at high rpm on gas. This is the possible presence of a place through which air can pass during the heating of the engine.

Be sure to check the fuel inlet hose, among other things. The problem may be that it does not hold well or is cracked altogether.

These are the main reasons why a lawn mower can stall.

If it stalled when opening the damper

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

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

Trimmer stalls: causes and troubleshooting

The lawn mower is a mobile, high-performance tool for beautifying home gardens and surrounding areas. With prolonged operation, due to wear of parts or manufacturing 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 performance, and the second for those who have basic locksmith skills and can independently figure out the causes of breakdowns and ways to eliminate them.

It is now accepted 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.

If stalled after gas supply

Owners of gasoline scythes quite often mention that the lawn mower stalls when you press the gas. Typically, such a breakdown occurs due to a malfunction in the carburetor. Failure in its operation can occur due to prolonged storage, use in difficult conditions, significant overload of the motor. Vibrating movements of the device during operation will become a symptom of such a breakdown.

On a note! Users familiar with car carburetor repair can try to repair this important trimmer assembly on their own using the instruction manual. Otherwise, the right decision would be to contact the service center representatives for help.

Sometimes the trimmer stalls when you throttle because the fuel valve is clogged. This interferes with the supply of gasoline. To fix the problem, it is enough to loosen the valves. This will restore the normal fuel supply to the carburetor.

Another possible reason the mower stalls when gas is applied is a dirty breather (check valve). This part prevents the formation of a vacuum in the gas tank. If it is clogged, air does not flow, which means that fuel does not go to the carburetor. To fix the problem, you need to clean this element.

gas trimmer Carver 043 stalls when gas is applied

Trimmer stalls. how to fix the problem

The petrol trimmer is a useful tool for clearing unwanted grass from house 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 factors causing 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.

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.

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

Operating tips

It is worth paying attention to several recommendations for working with a lawn mower or trimmer, which extend the life of the device up to several times.

• As soon as you notice that the lawn mower or trimmer is vibrating, stop working immediately and check the serviceability of specific parts.
• Adjust the valves and check the operation of pistons and cylinders, clean and change the injectors, starting from the requirements set out in the user manual and the recommendations of the service centers.
• When air bubbles enter the system due to a broken fuel hose, apply gas. When gasoline burns with higher engine speeds, there will be fewer gas bubbles. But this is a temporary measure. Disassemble the unit as soon as possible and eliminate the cause of excess air leaks.
• Do not operate the unit in cold weather without warming up the engine. under load it can often stall. The effect here is the same as in the case when the driver at 40 started the car and immediately drove off without waiting for the engine to warm up.
• Do not leave the machine on the road. In the event of an accident, impact, it will immediately break down, and this will make the purchase of a new unit a compulsory measure. The car that crashed into it, at best, will receive damage to the body and bumper.
• Avoid working with a lawn mower or trimmer in a rainstorm. The ingress of water with air in the worst case can cause the engine to explode. Similar situations have arisen with cars.
• Do not use untested car oils and greases. The mower warms up the engine more than the car itself would do. if it overheats, the car oil will lose its lubricating properties. It will turn into a burnt out reagent. sticky, overly viscous and viscous, like fuel oil. He will immediately stop (and muffle) the engine.
• If the oil is old, previously drained from the tank of a machine or another (or the same) lawn mower (on a 4-stroke engine), settle it, filter it to remove dirt and metal. But get fresh engine oil as soon as possible.
• If the engine is two-stroke, observe the ratio of gasoline and oil. For compositions with mineral oils this is approximately 34: 1, for semi-synthetics. 42: 1, for purely synthetic. 50: 1. Do not violate these proportions: “oiled” gasoline will not burn out and quickly clog the engine, “not oiled”. will accelerate the wear of its moving parts.
• In terms of viscosity, winter oils include oils marked: SAE-0W / 5W / 10W / 15W / 20W / 25W. For summer. SAE-20/30/40/50/60. For example, SAE 10W-40 is already a multigrade oil (when the mower is operating from spring to autumn inclusive). Be sure to check with the manufacturer what kind of oil you need.
• Always use high quality gasoline that has gone through all the purification steps of the manufacturer.
• The recommended octane number of gasoline is AI-92/95/98. The use of the 76th can lead to a shortage of the engine in terms of power, frequent stalling if you fill, for example, 76th or 80th gasoline.
• If you are not sure about solving problems with a lawn mower yourself (which does not pick up speed and often stalls), call a master or contact a service center for repairing motorcycle and garden equipment. Professionals are no stranger to doing this work for you.

Observing all these precautions, you will give your mower many years of fruitful work, and yourself. the luxury of well-groomed lawns, comfort and convenience when mowing unnecessary vegetation on your site.

For the reasons why the lawn mower stalls when you press the gas, see the next video.

Stihl trimmer won’t stay running. Sad ending

lawn mower stalls

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

However, you should not immediately run to the service center and pay a lot of money to the masters who convince you of a serious malfunction in the device.

the lawn mower stalls at high speed on gas

Perhaps the most common complaint related to petrol trimmers is “lawn mower stalls.”.

Of course, the reason for this may be a rather serious malfunction. However, most often the situation is much simpler than it seems at first glance.

To cope with such a problem, first of all, try to figure out its causes on your own, because after finding out the cause, it is much easier to deal with the problem, and sometimes it even self-destructs.

In fact, the reasons are when the lawn mower stalls at high speeds, there are quite a few reasons.

Another one is the presence of malfunctions in the power system.

In this case, the lawn mower will stall at idle speed. A misalignment or improper adjustment of the carburetor can lead to problems with the power system.

Vibrations that occur during the operation of the lawn mowers can lead to misalignment.

Incorrect adjustment of lawn mowers can be corrected simply by adjusting it in accordance with the requirements specified in the instruction manual.

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 by loosening the gas cap.

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

over, the lawn mower can stall due to poor fuel flow to the carburetor.

Why, then, does the device start, you ask?

The reason for this is that at first the fuel gradually runs into the carburetor and it is enough to work 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 lawn mower stalls at high rpm on gas may also be air leaks.

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

Be sure to check the fuel inlet hose, among other things. The problem may be that it does not hold well or is cracked altogether.

These are the main reasons why a lawn mower can stall.

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.

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.

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.

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.

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

At high revs

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

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.

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 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 in carburetor

All the possible reasons that the lawn mower stalls, and how to fix them, are contained in the following video.

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.

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 fuel mixture, the unit should operate at moderate load.