The mower won’t start, pick up speed, or pick up grass
The mower will not start, does not pick up speed, does not collect grass Frequent breakdowns of the lawn mower: an overview and problem solving When using a gasoline lawn mower to mow the lawn, you need to be
The reasons
The main reason for the failure of the mechanism can be called improper use. With knowledge of the principle of operation and the mechanisms of garden equipment, you can troubleshoot yourself. But it is still better to consult a specialist, especially in case of serious breakdowns. Among the most common breakdowns, the following can be distinguished:
- Noise unusual for garden equipment. This is usually due to loose bolts or poor housing. It is necessary to carefully inspect all components and tighten the bolts. If the noise resembles a whistle, a foreign object is most likely caught in the mechanism. It is necessary to turn off the mechanism and remove the foreign object;
- The case shakes unnaturally during operation. Most likely, the reason is a malfunction of the cutting element that needs to be replaced;
- The mower will not start. First you need to check if there is enough gasoline in the tank. If this is okay and the engine is not running, a faulty spark plug could be a possible cause. In other cases, it is recommended to contact a specialist, since it will not be easy to repair the mower yourself;
- The engine does not pick up speed and immediately stalls. The cause may be a jammed mechanism. If this happens due to a lack of lubrication, you need to pour oil into the crankcase and set the mechanism in motion;
- Uneven lawn surface. This means that the cutting elements are dull and do not cut the grass well. It is necessary to sharpen the knives, and it is better to replace them with new ones;
- The lawnmower does not move or is difficult to drive. First of all, check that the cutting height is correct.
All of the above malfunctions can be eliminated independently without contacting specialists.
Service
It is worth listing a few tricks by which you can keep your garden equipment in excellent condition and minimize the need for special maintenance.
- If the mower has not worked for a long time, it is necessary to drain the stagnant gasoline, as shown in the photo;
- Carefully pour high-quality gasoline into an empty tank using a watering can;
- If necessary, add carburetor priming primer and set maximum speed.
The lawn mower does not collect grass
This could be due to faulty or dull knives. In order to avoid such a situation, you need to install new knives every season. You can also do with sharpening the knives at an angle of 30 °.
When sharpening, you must protect yourself with special goggles and protective gloves. After sharpening, you need to test the balance of the knives.
Service cost by manufacturer
- Bosch
- Makita
- AL-KO
- Hyundai
- Daewoo
- Patriot
- RYOBI
- Stihl
- GARDENA
- Champion
- MTD
- Husqvarna
- Texas
- Huter
- Echo
- CRAFTSMAN
- Viking
- Greenworks
- SABO
The cause of the defect is not gaining momentum
From the experience of our service engineers, we can distinguish the following reasons:
- Untimely prevention and cleaning of the device
- Lack of protection against power outages
- Replacing consumable accessories
- Not scrutinizing the user manual or ignoring the manufacturer’s advice.
- Not careful use
The device has broken down – what are the actions?
There are two ways to solve the problem. The first is to try to fix the breakdown on your own, having studied the information on the Internet, the second is to hand it over for repairs to any one of the 18 Ymedia services. It is not the first time that we have eliminated the "lawn mower is not gaining momentum" malfunction, and we want to share our experience with you, to guide you on the cost and terms indicated in the table below.
A bit of theory
Before you solve the problem of which lawn mower to choose for working on your lawn, you should know that the electric motor of a lawn mower is of two types:
- Synchronous. It is a motor in which the rotor and the magnetic field rotate at the same speed – synchronously. Even if the rotor receives a heavy load during operation, its speed does not decrease. The engine continues to run at a stable speed. To achieve this result, sliding contacts are used. Therefore, a synchronous motor is more complex in design, and therefore more expensive in terms of cost.
- Asynchronous. A motor in which the rotor speed does not match the speed of the magnetic field. The stator and rotor are separated by an air gap, there are no slip rings. It is simple in structure, which means that it is not as difficult and expensive to manufacture as a synchronous one.
Which lawn mower motor is better, there is no definite answer. Both types of engine have their own advantages and disadvantages.
For those who do not want to delve deeply into the wisdom of electromechanics, the explanation is quite simple. Each motor has two key elements: the stator (immovable, with windings) and the rotor (movable). The current from the electrical network is supplied to the stator. A magnetic field arises in its winding, which rotates. Thanks to him, the rotor also begins to rotate. And already the revolutions of the rotor are transmitted to the shaft of the device.
In our case, on the vertical shaft on which the lawn mower cutting blade is installed. It turns out that the work of the knife directly depends on the engine speed. Stable rpm – the knife rotates just as stably and powerfully. Weak rotor speed – the knife also begins to weaken, tightens the grass. He simply "does not have the strength" to quickly and efficiently cut vegetation.
In a very short way to determine which lawn mower is better, let’s say this:
But this is all a bit exaggerated, and in no way means that the induction motor is worse. An asynchronous motor is the simplest and cheapest of all those previously invented. It does not require complicated maintenance, does not get very hot, it does not have rubbing contacts. And its reliability is within the normal range, if the manufacturer is of high quality and has installed protective systems.
Lawn mower motor: synchronous or asynchronous
Electric lawn mower. Not the simplest equipment, and if it is not purchased by a specialist (that is, not an electrician), then he is unlikely to be interested in the question of what type of engine is installed in it. The problem becomes relevant only when the engine starts to "junk". Accordingly, it requires attention. He can:
- Overheat and shut down.
- Do not pull on power.
- Just burn out (worst case).
In any of these cases, the user begins to repair or replace the engine, and then, finally, he finds out what kind of electric motor his equipment has.
In order to save you from such unpleasant moments, we have selected tips on which electric lawn mower motor to choose, taking into account your capabilities and needs.
Electric lawn mower with synchronous motor
A synchronous motor always runs at a constant speed. Due to this factor, it is used where stable turnovers are especially needed. In lawn mowers, this moment is key and not necessary. Synchronicity is also important at high engine power. In mowers, this is more than 1 kW. The blade in synchronous lawn mowers is located on a separate shaft. This shaft is connected to the motor shaft by a belt drive. The weak point is the knife shaft bearings.
- Low sensitivity to power line voltage surges.
- Stable rotation of the cutting blade, regardless of the load.
- High efficiency and power factor.
- Complex construction.
- The brushes heat up when rubbed.
- Difficult start. To make it easier, the rotor first starts up asynchronously and then adjusts to the magnetic field.
Electric lawnmower with asynchronous motor
Currently, asynchronous motors are used more and more in lawn mowers. In this case, the knife is placed directly on the motor shaft. The result is a simple and rather reliable design. There is no rotor winding. There are no brushes. Nothing fancy and everything works fine.
- Simple construction. No maintenance needed. Easy repair.
- Low manufacturing and operating costs.
- Heats up less. Even if it heats up, it continues to work, while losing speed.
- The efficiency and power factor are lower than that of a synchronous motor.
- It is difficult to regulate the speed of rotation – low controllability.
- Turnovers depend on the network.
- Very sensitive to voltage surges in the fixed network.
Thus, when choosing synchronous or asynchronous lawn mowers, you should be guided by considerations of either low cost, or decide which is more reliable in operation.
A bit of theory
Before you solve the problem of which lawn mower to choose for working on your lawn, you should know that the electric motor of a lawn mower is of two types:
- Synchronous. It is a motor in which the rotor and the magnetic field rotate at the same speed – synchronously. Even if the rotor receives a heavy load during operation, its speed does not decrease. The engine continues to run at a stable speed. To achieve this result, sliding contacts are used. Therefore, a synchronous motor is more complex in design, and therefore more expensive in terms of cost.
- Asynchronous. A motor in which the rotor speed does not match the speed of the magnetic field. The stator and rotor are separated by an air gap, there are no slip rings. It is simple in structure, which means that it is not as difficult and expensive to manufacture as a synchronous one.
Which lawn mower motor is better, there is no definite answer. Both types of engine have their own advantages and disadvantages.
For those who do not want to delve deeply into the wisdom of electromechanics, the explanation is quite simple. Each motor has two key elements: the stator (immovable, with windings) and the rotor (movable). The current from the electrical network is supplied to the stator. A magnetic field arises in its winding, which rotates. Thanks to him, the rotor also begins to rotate. And already the revolutions of the rotor are transmitted to the shaft of the device.
In our case, on the vertical shaft on which the lawn mower cutting blade is installed. It turns out that the work of the knife directly depends on the engine speed. Stable rpm – the knife rotates just as stably and powerfully. Weak rotor speed – the knife also begins to weaken, tightens the grass. He simply "does not have the strength" to quickly and efficiently cut vegetation.
In a very short way to determine which lawn mower is better, let’s say this:
But this is all a bit exaggerated, and in no way means that the induction motor is worse. An asynchronous motor is the simplest and cheapest of all those previously invented. It does not require complicated maintenance, does not get very hot, it does not have rubbing contacts. And its reliability is within the normal range, if the manufacturer is of high quality and has installed protective systems.
Lawn mower motor: synchronous or asynchronous
Electric lawn mower. Not the simplest equipment, and if it is not purchased by a specialist (that is, not an electrician), then he is unlikely to be interested in the question of what type of engine is installed in it. The problem becomes relevant only when the engine starts to "junk". Accordingly, it requires attention. He can:
- Overheat and shut down.
- Do not pull on power.
- Just burn out (worst case).
In any of these cases, the user begins to repair or replace the engine, and then, finally, he finds out what kind of electric motor his equipment has.
In order to save you from such unpleasant moments, we have selected tips on which electric lawn mower motor to choose, taking into account your capabilities and needs.
Electric lawn mower with synchronous motor
A synchronous motor always runs at a constant speed. Due to this factor, it is used where stable turnovers are especially needed. In lawn mowers, this moment is key and not necessary. Synchronicity is also important at high engine power. In mowers, this is more than 1 kW. The blade in synchronous lawn mowers is located on a separate shaft. This shaft is connected to the motor shaft by a belt drive. The weak point is the knife shaft bearings.
- Low sensitivity to power line voltage surges.
- Stable rotation of the cutting blade, regardless of the load.
- High efficiency and power factor.
- Complex construction.
- The brushes heat up when rubbed.
- Difficult start. To make it easier, the rotor first starts up asynchronously and then adjusts to the magnetic field.
Electric lawnmower with asynchronous motor
Currently, asynchronous motors are used more and more in lawn mowers. In this case, the knife is placed directly on the motor shaft. The result is a simple and rather reliable design. There is no rotor winding. There are no brushes. Nothing fancy and everything works fine.
- Simple construction. No maintenance needed. Easy repair.
- Low manufacturing and operating costs.
- Heats up less. Even if it heats up, it continues to work, while losing speed.
- The efficiency and power factor are lower than that of a synchronous motor.
- It is difficult to regulate the speed of rotation – low controllability.
- Turnovers depend on the network.
- Very sensitive to voltage surges in the fixed network.
Thus, when choosing synchronous or asynchronous lawn mowers, you should be guided by considerations of either low cost, or decide which is more reliable in operation.
Lawn mower stalls
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 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 that there is a serious malfunction in the device.
The lawn mower stalls at high speed on gas
Perhaps the most common complaint with petrol trimmers is the lawnmower stalls.
Of course, a rather serious malfunction can also be the reason for this. 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, there are many reasons for this when the lawn mower stalls at high speeds.
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 incorrect 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.
Incorrectly adjusted 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.
What’s more, 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 there is enough fuel to operate at increased power.
However, then it is produced and at high revs the engine starts to stall.
As for the carburetor, the problem here may also be that its body is too tight.
Air leaks can 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 process of the engine.
Be sure to check the fuel inlet hose, among other things. The problem may be that it is loose or cracked altogether.
These are the main reasons why a lawn mower can stall.
The lawn mower will not start
- If the engine will not start, check the position of the choke. If the air temperature exceeds 30 ° C, set the middle position;
- With prolonged operation of equipment, it is necessary to take breaks for 5 minutes to avoid overheating of the engine;
- It is necessary to check if gasoline has hit the spark plug;
- If the gasoline in the tank is stagnant, it is worth changing it to a new one;
- It is necessary to check whether the filter passes air well, if necessary, rinse it;
- You can pump fuel into the carburetor using a primer.
If the mower does not drive, the drive belt should be checked – it may be worn out and needs to be replaced.
Blades not adjusted correctly
This can be seen from the uneven surface of the lawn. Unplug the mower and wear protective gloves before making adjustments.
The gap between the cylinder and the knives should be uniform in all areas and not exceed the thickness of a sheet of office paper. Even the same paper is used to adjust the gaps. It is inserted between the cylinder and the knife, after which the drum rotates. Adjust the knives until the paper is cut evenly at any point on the knife.
Frequent lawn mower breakdowns: overview and problem solving
When using a gasoline lawn mower to mow the lawn, you need to be careful and follow the rules of operation exactly. After completion of work, the device must be cleaned, since even a slight blockage can block the moving mechanism. If there are frequent breakdowns of the lawn mower: you can find out an overview and solution of problems by reading this article.