The lawn mower does not start or stalls?

Many owners of gasoline lawn mowers sooner or later face technical problems of this technique. Most often, problems arise after three to four seasons of active operation of the lawn mower or after the equipment spends the winter in an unexplored garage. These problems are manifested as follows:

  • The lawn mower will not start
  • The lawn mower starts up, but soon stalls
  • The engine of the lawn mower is working with interruptions
  • The engine of the lawn mower does not work at full power

It doesn’t matter what engine is on your mower: dear Japanese Kawasaki or a simple Chinese Lifan, during the years of operation these problems are more likely to appear in all lawn mowers. However, do not be upset and rush to take your mower to the service center. In the vast majority of cases, the lawn mower can be easily repaired with your own hands. In this material, we will tell you step by step how to do it!

How to make repair of the lawn mower with your own hands?

Those who have land are very familiar with what struggle is weed.

Especially when it often rains and the grass grows not by the day, but by the hour. Earlier, and sometimes even now, this issue was resolved with the help of a good old braid for grass.

But technologies are not standing still and now in this case, assistants such as electric and gasoline lawn mowers help.

The gasoline mower has several significant advantages over electric, such as mobility and lack of danger of electric shock. But there are many drawbacks, for example: high price, a lot of noise, expensive fuel and significant weight.

Electric mowers are cheaper, easier, work on inexpensive energy, and are not difficult to maintain and repair. These advantages become the main reason for their great popularity among buyers of this type of technique.

But despite the pretty good quality, improper operation and a lot of load, they can disable the device. In such cases, you should not immediately carry the device to the repair shop, but try to find and eliminate the cause of the breakdown yourself. Over, as mentioned above, electric lawnmands do not have as many nodes and details as gasoline.

The main thing is to have some tools and faith in yourself. In this article, I will just show you how I did my own repair.

AL-KO, the lawn mower of the company, has serious problems in work, namely: the engine stop without load and its strong overheating, was taken as an example. The motor stops, buzzes and start it again, only repeated pressing the Start button helps. The button has to restart almost every 30 seconds, and with further work and more often.

Of course, you can work, but it is very annoying and gives the feeling that somewhere the problem is. Therefore, I wanted to figure out where?

After the mower was working within an hour, the engine temperature was measured. It was impossible to touch him with a finger. He directly radiated heat. If you continue to pay attention and continue to work on such a mower, an electric motor will inevitably fail.

It is necessary to determine the cause of the motor overheating. To do this, remove the top cover of the case, under which the engine is located and its power chains.

The lid is held on six screws with a hat under a cross screwdriver.

Unscrew these screws and remove the lid. Upward.

Having removed it, you can see the impeller, the capacitor, two connectors and the engine itself.

At first glance, no special problems are invisible. The engine winding darkened slightly from the temperature, but so far it is not critical.

To more carefully inspect the capacitor, it is necessary to unscrew the mount and pull it out.

The capacitor of some external damage did not show.

To check it, you need to disconnect the capacitor and feed the engine for a short time. If he did not start and began to buzz, then the capacitor is intact, because the engine was launched with him. Disconnect the power and connect the container connector back to the engine circuit.

Next, try to twist the impeller. It is mounted on the axis of the rotor and rotates rather tight.

And the reason for such severe rotation is a mechanical brake, which for safety stops the engine rotation when the power is turned off.

It looks like a sleeve that moves freely from top to bottom, along the rotor axis.

Когда напряжение на двигатель не подано, эта втулка прижимается верхней частью о крышку, на которой приклеено две резиновые полосы. Thus, the knife is inhibited on the rotor shaft.

When feeding, the brake sleeve under the influence of the magnetic field is drawn to the center of the rotor and provides free move.

With a careful examination, this sleeve with the brake noticed that at the time of turning on the engine, the brake is retracted and gives the shaft free rotation, but after 2-3 seconds it is released again and begins to slow down the motor. This should not be. Hence the stop of the knife during operation and overheating of the engine.

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To find out what is the reason for this work, you need to remove and disassemble the engine.

To do this, disconnect the connectors and put the device on the side to get to the clamping screws. Access to them closes a knife with mounting elements.

To remove it, first you need to unscrew the knife bolt (cm. Figure below).

Direction of rotation, like a regular bolt, and not with left thread. That is, unscrew it counterclockwise, and tighten the clock.

The head of the bolt is plastic, so using the key, it must be well planted so as not to “lick” the edge.

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After extracting the bolt, the knife and its plastic disk are removed.

Under it is a height sleeve. With its help, you can slightly lower the knife.

Adjustment is carried out by the washers put under the sleeve (see. Drawings below).

remove, cover, lawn, mower

We remove everything, only the engine shaft and the hexagonal screws of its fasteners remain.

The key for these bolts has a distance between faces of 6 mm. Unscrew them counterclockwise. Removing the last screw, with one hand, hold the engine.

Next, put the mower on the wheels, and clasping the engine with our hands. We raise it.

To disassemble the motor, you need to free tightening studs. We unscrew them all.

Remove the impeller with two screwdrivers.

We proceed to the removal of the back cover. A wooden block and a hammer will help this.

But first you need to mark the position of the covers with something sharp to the engine body.

Put the engine on the side and hit with a hammer, through a wooden gasket, on the rear shaft.

The motor at that moment should hold another person.

We hit until the axis comes out of the bearing to the end.

Balancing a knife

After sharpening the edges by any of the described methods, it is necessary to check the balance of the knife. The balance means the same weight of the halves of the product. You need to insert a pin, a nail, screwdriver or any rug of round cross section into the hole for fastening. Lift. If the knife retains a strictly horizontal position, everything is in order with the balance. When tilted into one of the sides. The balance is broken, you need to restore it. You can restore quite simply. On the side going down, you need to remove a little metal in the same way as sharpening was performed. Metal must be removed a little, periodically checking the balance.

remove, cover, lawn, mower

If the knife has not sharpened for a long time, excited chips will be likely to appear on it with a high probability. They need to get rid of them, withdrawing the edge of the blade at an uniform angle along the entire length of the cutting area

Please note that there may be several edges on each side, in this case, several cutting planes form a lawn mower.

Lugus knives have unilateral sharpening, the descent of which is usually turned upside down. To derive the descent at the right angle, you should use an electric sharpener with a carborne stone, and in the absence of such a small file

It is very important to remove metal evenly from both blades. Therefore, keep the same pressure and at least approximately count the number of passages of the sharpener.

Small deviations of the angle of sharpening are not critical, but the smoother the descents will be displayed, the more the resource of the knife will be. When deriving the shape of the blade, it always moves to the grain in order to avoid the formation of large burrs and mix. You should not use a corner grinder for pre.Sharpening. Overheating can worsen the quality of the metal. However, you can install a petal or plate disk for sandpaper on an angular grinder.

remove, cover, lawn, mower


Before installing a knife on garden equipment, a check for balancing is performed. She pursues the goal of finding out whether the weight of the knife had the same weight. For this, the acute strip is put on a pencil with the central hole. Shoulders should be evenly balanced and have the same weight. If one of the sides pulls down, then it is slightly grinding again.


The machine will help to cope with the work quickly and, without making great efforts. The main thing in this matter is not to achieve too sharp edges. If you sharpen them so thin as the razor, then the risk of chips and breaks is great.

During operation, it is important to adhere to the right angle and remove the metal from the blades in the same amount. The machine does not get rid of the editing of the edges with sandpaper.

Sharpening of a knife lawn mowing knife.

Gasoline lawn mowers; Electronic lawners. Wired and battery.

Their equipment is used in the main bunk knives, more often a knife with 4 blades. The sharpening technique for all types is one, and has no differences.

Working gloves; The key is unit, or end.Sized end; Ratfille set, abrasive bar, or electronic sharpening tool.

Step 8

Get with both hands by the tire of three and nine hours and pull it directly from the axis of the lawn mower.

Replace the bus of the new or repair the existing. Reinstall the new tire using the same equipment in the reverse order.

Having removed half the clutch from the engine shaft, we were faced with the problem, the fact is that half of the clutch was repaired, a sleeve was inserted into it, and this sleeve was already attached to the engine shaft. When we took off the half.Memba, the sleeve remained on the shaft.

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We removed half the coupling with a puller, heating it with propane. Half of the clutch heated to red adhesion (on the one hand) expanded even more (according to the laws of physics), while the sleeve was colder and sat tightly on the engine shaft. Therefore, the sleeve remained on the engine shaft.

The question was how to remove the sleeve? There was no suitable puller, since the thickness of the sleeve was about 10 mm, it was difficult to touch it. It was not possible to sew the sleeve; He was too close to the engine, sat tight and received mechanical damage.

There were two more real options. First, put half the coupling back to the sleeve, fix it (with bolts or welding) and try to remove the sleeve with a half sleeve. It was worth doing right away, but “good thinking comes after”. Secondly, cut the sleeve with propane or a grinding machine, in this case you will need to look for a new sleeve.

We chose the third option, made a home.Made sleeve puller. Two holes were drilled in the sleeve and the thread was cut into them. Two bolts are screwed, two large nuts are welded to the bolts. Two nails were screwed to the nuts, a homemade collector was installed on them. As you can see in the photo.

The sleeves were heated by propane, and they began to rotate it with the help of a puller. The studs began to rotate. To prevent this from happening, the puller was recorded by a crane beam. The sleeve began to open slowly from the shaft.

Somewhere halfway through the thread on the nut and the hairpin broke. Welded the hairpin to the nut with electric welding. And then quietly removed the sleeve from the engine shaft.

I needed to remove a large pulley from a large electric motor. The first thing that occurred to me. This is used, but the one that I have can just break an aluminum pulley.

The engine was not used for a long time, the aluminum pulley was attached to the iron shaft. The contact area is very large, the diameter of the landing hole is 24 mm, the depth is 60 mm. For several days I watered the engine shaft with a “liquid wrench”, tried to hang the motor behind the pulley and knock out the shaft, none of this happened.

Finally, I took several iron corners, cut them in size and drilled holes, screwed all the details with bolts, it turned out to be a simple pulp of home.Made tools. There was no particular hope that I could remove this pulley. He pulled the puller onto the pulley and slowly tightened the bolt, squeezing the shaft. Without much effort, the pulley began to be removed from the motor.

Stiga Combi 48 s b

Katolik7, and read the instructions? I have in Viking it is written from 5W-30 synthetics to the SAE30 mineral water, the main thing is to follow the replacement time.

Katolik7 and what confuses you? That the lawn mower is omnivorous or oil 5w40?

Like a mower? I want to choose, the manager of this of the customs recommended this particular manufacturer, despite the list of Makita, Khuskvarna. I think it’s really so good or he needs to sell it?

Normal mower. BS engine, not what China. Here is the truth from under the valve cover sometimes a couple of drops of oil appears. I repurged recently, sort of like normal. Or maybe the oil lice was filled. But this is nonsense. Frame. Iron. Although a controversial question is better. Plastic, if I did not wash, then hell with it. And iron will corrode. But iron is kind of more reliable. If you take something else (instead of this), then better than Khuskvarno. But it is one and a half more expensive. And this one is fine. I am still satisfied. Stews five with bushes I crumble almost every week. Well, if you take it, then with a plastic bag, if they are equipped with those. It will be more convenient to use a little more convenient. In general, if there is money and you need to mow a lot, then buy a powerful (namely powerful) Khuskvarno. But, I think this one will cope with your needs with a bang. Especially in the brand you need to pay part of the money for nonsense.PS. Yes, by the way, the neighbor also has Stig, weaker and with the Chinese engine. Like 46. Two years already. So far, I am satisfied.

And there is a fitting for connecting a hose in it, what to wash the deck?

What a fitting? How do you imagine that? For the first time I hear and cannot imagine the need for unnecessary function.

Wash the deck and knife after the mowing, connect the hose with water to the mower and turn it on, everything, the mower is washed. By the way, on YouTube looked at the reviews of these mowers and the fitting was there.

I doubt that without a brush, the whole shnyaga, adhering from below to the deck, is washed off. The main yes, but this horseradish is not a plaque. I hardly wipe with my cheek. And if you do not wipe, then over time it will rust. I have to see, maybe where there is a fitting. Yes, and if when washing cold water falls inadvertently on the engine. Then, probably, the khan will be. I am mine when the engine will flow a little.

Everything is specially done there, it will not get on the engine. Even if it falls, then nothing terrible will happen, I am my uno.Based tractor after work, water falls on the engine, it is not electr. Well, judging by the video, a good thing. In general, while my choice is on this model, if nothing changes, then in the coming days I will order myself. How the run.In went, how much and what oil do you need?

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And what a run.In, flooded the oil and go. Two tanks blurted out, then changed the oil and everything. As I understand it, now the engines, as before, are not needed. A few years ago I bought a trimmer for Stihl grass. So they also said there, poured fuel and into work. Well, without fanaticism, of course. The first couple of hours.And my oil is left from the car. Synthetics Mobil 5W40. After the replacement, burned four dressings. Well, let this year this year will be a couple more. So I think, in the spring you can not immediately change. It seems like the oil changes after 25 work. At least this was written on my motorcycle. There is also BS engine. But the load there is more.

How a mower perceives uneven areas or you have an even area? Personally, I decided to buy due to the fact that it takes 5 hours to melt my site with a trimmer, I want to reduce my time. I am also interested in the mulching function, use it?

Dismantling Bosch Rotak 34

Please share the experience of repairing this product. Interested in the process of removing the upper part of the case. I turned out all the screws that I found, but it doesn’t work to separate the parts of the case, something holds something to the right in the area of ​​the rear wheel, or the latch, or the screw that is not visible for some reason.

Disassembled it, did not notice any hidden ambushes. My Bosch unsuccessfully caught the wedge with a small knot that came between the body and the end of the knife. The motor is alive, but cut off the teeth on the gear belt and on the plastic gear. I bought a new leroic brand (name from a bitch), fully justified itself. It turned out to be very convenient to change the height, Bosch had a piiip with this.

In short, Bosch was precipitated, by spring you can either look for a donor, or let it go to the organs.

I disassembled and repaired, I do not remember any secret latches


There are such people who are important process and love to pick up. Someone catches the fish, is also a lot of use, but there is, someone disassemble the mowers, it does not happen too much but it happens and it turns out.

I also have a rotak in the country with eaten gears under the belt. I want to restore and even know how already already))) but laziness. At the same time, 2 more mowers cost, that is, there is no need in the third, but it’s nice to work with your hands and see the result.

Primary inspection and elimination of problems

There is an algorithm that helps in most cases to identify the reason why the lawn mower does not work. We will consider actions that are possible at home.

Dewalt 2X 20v XR Lawn Mower Problems

  • Having dismantled the engine, pay attention to the capacitor. You can suspect the presence of problems with it if the lawn mower does not have the opportunity to ensure stable functioning at idle. This indicates that the capacitor could swell or oxidate.
  • Devote time to inspection of the winding of the electric motor. Burnt segments may be present on it, or the integrity of the winding may be violated.
  • Learn the start button for performance. You can do this using the tester. An inexpensive indicator screwdriver will suit him for replacement.
  • Inspect the power cable and a fork, as well as an extension cable that you use to connect a mower to a network. If the probability of the presence of mechanical damage.
  • Find out whether the voltage of the home power grid meets the requirements of garden technology: it may be too high or it is not enough. If necessary, use the equipment that stabilizes the voltage.

Repair of an unexpectedly stopped electric engine

If the motor worked, but suddenly stalled, you need to check the crankshaft and the piston. Perhaps they were overwhelmed. This is due to the absence of oil in the crankcase. It is better to contact specialists with this breakdown, as in the case when the electric motor of the lawn mower requires repair.

For non.Precise operations of the lawn mower, the owner must conduct its regular maintenance after the end of the working season, t.E. Before her premises for winter storage. This will cost cheaper than repair or buying a new electrical device.

Among the main measures that ensure the reliable operation of an electric mower is clean. The mowed grass accumulated under the neckline causes erosion of metal parts. The compressor or blunting will help to remove the remaining weeds.

The electric motor of the mowing is air cooling, therefore, it also requires a cleanliness that is a key to effective functioning. Suitable for cleaning the cooling ribs soft brush and compressed air.

Timely oil replacement specified in the use guide will become the key to prolonged trouble.Free work, as well as the periodic cleansing of the air filter.

In the presence of a certain experience, it is easy to repair the lawn mowers with your own hands. The video below will help in this.

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