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.
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 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.
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 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.
Main reasons
Possible reasons for the lawn mower or trimmer to stall when trying to restart and resume interrupted work:
- engine problems;
- failure in the gasoline and oil supply system;
- damage to pipelines (capillaries, hoses, nozzles);
- faults in the ignition system.
A general description of scythe or trimmer problems is not enough here. A clear and immediate repair, high-quality service is impossible without specifying the identified cause.
Other reasons why the engine stalls when hot
In addition to the above material, I would like to note a number of malfunctions that lead to a sudden stop of a hot engine while driving. The unit can stall on the move if the timing belt or chain breaks. This situation means that in most cases, the power unit will need expensive repairs, since as a result of the breakage, the valves are bent, piston defects and other damage to engine elements occur.
If the engine stalls while driving through deep puddles or other water obstacles, then there is a high probability of water getting into the cylinders or getting the ignition system elements wet. In the first case, water enters the combustion chambers through the air intake. Since water is incompressible, the engine is severely damaged, the connecting rods bend, cracks appear in the cylinder block, etc. After a water hammer, it is usually necessary to overhaul the engine. In the second case, the problem is not critical, since after removing moisture, the performance of the ignition system and the power unit can often be restored.
Also, a car can stall on a hot one if there is too little fuel in the fuel tank. Quite often, the motor stops when driving uphill. The fact is that during a prolonged ascent, the car is in such a position for a long time when the fuel tank is tilted and the fuel level is insufficient to supply through the fuel intake. It is quite obvious that in this case the engine will stall.
A hot engine stalls on the move or at idle
To begin with, the symptoms and signs of this problem can manifest themselves in different ways. Quite often, the power unit can stall in idle mode, and unstable operation and complete stop of the internal combustion engine often occurs after the engine has warmed up.
First of all, diagnostics should start with checking the spark plugs and their condition. In parallel, high-voltage armored wires should be checked. This must be done due to the fact that weak sparking or the complete absence of a spark on the spark plug electrodes is possible. Interruptions in the spark lead to serious malfunctions in the engine, as a result of which both the cold unit and after warming up the engine stalls. Replacing spark plugs and high-voltage wires often helps to solve the problem.
Another common situation is when the engine stalls hot or cold immediately after starting. In this case, on many modern cars with an injection power system, the idle sensor should be checked. The output of this element of the electronic engine control system often leads to the fact that the engine in idle speed is simply unable to work.
In some cases, cleaning the XX regulator helps, in others the device should be replaced. On cars with a carburetor, the idle jets may become clogged and other carburetor malfunctions. Injection motors also require an additional check of the synchronization sensor (DPKV); possible problems with the gas pump should not be ruled out. One way or another, if the engine stalls on a hot one or it constantly happens with a cold unit, then in-depth diagnostics will be required.
On carburetor cars with a mechanical ignition distributor, a situation arises when the slider stops performing its functions. Quite often, after the internal combustion engine warms up, the central wire on the ignition coil may go off, there are problems with the capacitor of the ignition unit, etc. A well-known problem of cars with a mechanical gas pump is that the engine stalls in the heat. This is due to overheating, since the high temperature overboard and significant heating of the engine compartment do not allow the pump to cool normally.
In parallel, attention should be paid to the condition of the fuel filters. If the filter element turns out to be clogged, then during the increase in load and speed up, the required amount of fuel does not enter the engine through the dirty filter and the engine stalls. We add that usually, before a significant decrease in the filter capacity and a complete stop of the motor, the malfunction progresses. At first, the car may not pick up speed, it starts poorly, dips appear when you press the gas pedal, the engine is unstable or jerks when you press the accelerator, in transient modes, etc.
Modern cars with an injector have an electronic control unit (ECU, ECU). This unit is quite rare, but still fails. In this case, the engine may stall on the move, and the problem itself manifests itself in different situations, including after the internal combustion engine has warmed up. In this case, as well as if it is necessary to check individual ECM sensors, it is necessary to carry out computer diagnostics of the car. The system will display the existing errors in the form of codes, after decoding which it is possible to localize the malfunction. If the problem is “floating”, that is, it occurs periodically, then it is recommended to purchase a compact device that allows you to read information about the engine operation via the OBD connector. Due to the subsequent display of data on the screen of a smartphone, tablet or laptop with a preinstalled program, this solution will allow fixing failures in real time.
The engine stalls on a hot: reasons
Failure of a power unit to run cold or after warming up to a certain temperature may indicate a fairly wide list of possible problems. The engine starts to stall both suddenly and unstable in different modes, after which the internal combustion engine stops.
In this article, we will talk about the reasons why the engine stops at idle speed, as a result of which a warm engine stalls, why a car stalls on a hot engine in motion, etc.
What is the bottom line
As you can see, there are many reasons why a motor stalls when hot. In some cases, the engine normally starts cold and warms up, but after pressing the gas pedal, the speed drops and the car stalls.
Trimmer stalls: causes and troubleshooting
lawn mower is a mobile high-performance tool for the improvement of personal plots and adjacent territories.
With prolonged use 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.
Petrol trimmer stalls at idle speed
Often, when the engine speed decreases, the lawn mower engine stalls and does not idle when restarted. The main reasons for the occurrence of such a breakdown include contamination or misalignment of the carburetor, as well as clogging of the air filter.
Petrol trimmer stalls when idling
If the optimal settings of the carburetor are violated, it is necessary to clean and re-adjust it.
A clogged trimmer air filter can be dealt with by placing it in a solution with common household detergent for several hours.
If self-cleaning did not help to cope with the blockage, then it is better to purchase a new filter element in accordance with the instruction manual.
After carrying out activities, the user for a long time will not encounter a situation when the trimmer stalls at idle and functions only when gas is supplied.
The main malfunctions of trimmers: does not start, vibrates strongly, heats up during operation
lawn mower. On hot it stalls. Possible cause and remedy
Immediately I draw your attention to the fact that unfortunately this is not a carburetor. (My site.
The lawn mower stalls when you press the gas
Gas key lawn mowers
As practice shows, in most cases, the reason for stopping the engine is a misalignment of the carburetor associated with long-term storage or operation of the tool in an aggressive environment (temperature drops, high humidity, dust), high loads or wear of individual parts. The characteristic signs of the need to tune the carburetor include increased vibration. If you have experience in repairing the fuel system of gasoline engines, you can fix the problem without any special problems, otherwise you can read the detailed instructions for setting up the carburetor.
Hole in the fuel cap (breather) of the trimmer
The second possible reason why the trimmer stalls when you press the gas is a clogged hole in the fuel tank cap (breather). When small particles of dust, grass residues and sand enter it, a vacuum is created in the gas tank, as a result of which fuel ceases to flow into the carburetor. You can clean the breather of the petrol trimmer with a regular sewing needle and then blow it off with compressed air. Experts recommend that at the end of work, once in several mows, clean the breather. If cleaning is not possible, the cover must be replaced.
Lawn mowers fuel valve
With a similar problem, you should pay attention to the fuel valve, which, when clogged, ceases to pass 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 contamination of the valve. To do this, it is enough to blow it with a stream of compressed air.
Causes of malfunction
Reasons for failure of lawn mowers:
- mechanical;
- electrical.
In the first case, you will need to replace the body, handles, knives and wheels for the lawn mower. When the blades are blocked, the machine stops mechanically. Such a breakdown is associated with an attempt to mow hard or tall grass. Repair of the mower consists in freeing the cylinder from the stuck grass and rolling it in the other direction.
When operating the mower with a blunt or damaged blade, the grass is mowed unevenly. In this case, the device may vibrate or stop abruptly.
For the device to work properly, it is recommended to file the knives (30 ° angle). Otherwise, an abrasive tape is used. The gap should be between the 2 blades touching the strip. The device is switched on periodically (15 seconds each). If the knives are sharp, then the strip is removed, the gap is adjusted.
If the blades are in the wrong position, the cylindrical lawnmower makes sudden and uncontrollable movements. Normally, the gap between the cutting elements should be thinner than a sheet of paper. Otherwise, the clearance is adjusted.
It is preliminarily recommended to study the instructions of the device, remove the plug from the socket. When the connection is loose, a whistle appears. The device vibrates and rattles. Repairing a lawn mower means adjusting the bolt connections.
If the belt breaks or stretches, then it is necessary to replace it. This requires loosening the screws. Then the pulley moves, the belt is dismantled. The new part is slipped onto the small pulley and then onto the large pulley. The gear returns to its original position. The next step is to check the tension of the new belt. The deflection should not exceed 4 mm.
Repair of mechanical mowers is carried out when the cutting elements are blunt or damaged. In this case, experts recommend dismantling the removable knives yourself. Emery is used to sharpen them. Replace the battery if necessary in rechargeable models.
Before repairing the mower, the type of motor is determined:
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:
Top Reasons Leaf Blower Starts Then Stalls — Leaf Blower Troubleshooting
- 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.
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.
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
Why Does My Weed Trimmer Stall When I Tilt the Engine?
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.
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.
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 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.
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, you should pay attention to the fuel valve, which, when clogged, ceases to pass 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 contamination of the valve. To do this, it is enough to blow it with a stream of compressed air.
Does the engine stall immediately after starting? why is this happening
Another common prerequisite for not starting the trimmer is the presence of a blockage in the filter area. To confirm the hypothesis, it is enough to dismantle the designated unit and test the start-up 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 on the filter element, use the latest mesh. When resorting to similar actions, it is not recommended to leave the absorbing tube completely without a filter. After all, haste in our version leads to the need to repair the entire piston group of the engine unit.
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. The fault can be removed by cleaning the breather with an ordinary sewing needle.
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 does not start? The prerequisites for the failure of the mechanism are variations to be found in the excessive moisture of the candle channel. To diagnose and eliminate the difficulty, you need to do the following:
- Remove the candle. Wipe it painstakingly and dry it further.
- Drain off excess fuel in the chamber through the corresponding plug hole.
- Clean an old candle if there is carbon deposits on its surface. The use of an ordinary ladies’ nail file or a file will allow you to cope with the task.
- 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 at a minimum for 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 carried out according to the above tips, but the trimmer does not start, of course there is a spark 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. 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 simply will not be anything to ignite.
Even if the trimmer does not start here, it is worth assessing the quality of the contact between the high-voltage wire and the candle. For which the design of the absence of a spark is intended (if there is a reliable connection between the designated elements), for sure, the discrepancy is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of wizards who will reinstall the node.
The reason why the trimmer starts and stalls
Trimmer Starts And Stalls Immediately Causes
In recent years, the gasoline trimmer has gained textbook status as one of the main tools in the arsenal of summer residents. And such actions are logical, because a motorized scythe allows you to quickly put your personal plot in order. But it happens that the trimmer does not start on hot and cool. In such situations, it is necessary to establish the cause of the malfunction without the help of others. Next, let’s figure out what to do if the trimmer won’t start. The premises that mostly lead to such troubles will be examined further.
Where to start diagnosing defects if the trimmer won’t start? In situations where the tool stalls immediately after starting, it is worth looking at the following units of the unit:
Specifically, the breakdown of the above locations for the most part leads to the fact that the trimmer does not start well. It is necessary to consider how to remove such problems.
Let’s say your trimmer won’t start. Then the beginning of everything is to check whether there is enough fuel in the tank, to additionally evaluate the quality of the fuel consistency. The motorized unit should only be refueled with high quality gasoline. It is recommended to use fuel, the grade of which is not lower than AI-95. Filling the trimmer with fuel of unknown origin not purchased at a gas station can lead to frequent malfunctions of the tool. This causes a breakdown of the cylinder-piston accounting system. Repairs under these circumstances often exceed the price of the device itself.
Why won’t the petrol trimmer start? Incorrect preparation of the fuel consistency, which consists of oil and gasoline, can also lead to this. The proportions in which the designated components are connected are indicated by the manufacturers in the trimmer instruction manual. It is highly discouraged to prepare a fuel mixture in large volumes, in other words, for the future. Indeed, with long-term savings, there is a loss of the determining parameters of the substance. If the trimmer does not start, it is worth draining the old fuel and using a freshly prepared fuel consistency.
the lawn mower stalls at high engine speeds
During operation, a situation arises when, when you press the fuel mixture supply button, the speed of the unit does not begin to increase, but to 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 tank 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 removing 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 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.
Petrol trimmer stalls at idle speed
Often, when the engine speed decreases, the lawn mower engine stalls and does not idle when restarted. The main reasons for the occurrence of such a breakdown include contamination or misalignment of the carburetor, as well as clogging of the air filter.
Petrol trimmer stalls when idling
If the optimal settings of the carburetor are violated, it is necessary to clean and re-adjust it. Clogged 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 the blockage, then it is better to purchase a new filter element in accordance with the instruction manual.
After carrying out activities, the user for a long time will not encounter a situation when the trimmer stalls at idle and functions only when gas is supplied.