Trimmer for grass gasoline for grass disassembly. Common malfunctions of electric trimmers

DIY lawnies repair: analysis of malfunctions and methods for their elimination

An indispensable tool for a modern summer resident or the owner of a private house is a lawn mower, which allows you to effectively and efficiently bring the adjacent territory in order. The period of active use of motorcycle is in late spring until October of the month. Modern units are equipped with powerful and hardy ICEs, enhanced transmission and main nodes. Despite this, physical wear, production marriage or improper exploitation leads to the failure of a trimmer for grass. In order to repair a trimmer for grass with your own hands, you must have at least basic knowledge in the field of technology and a little experience in its repair.

The main node of any gasoline tool is the internal combustion engine (ICE), which through various methods transmits a rotational moment to the executive body. In a modern benzocosa, a duralumin rod (pipe) is used as an element of the transmission between the motor and the trimmer head, inside of which the drive shaft is located.

Thanks to a highly reserved engine, the frequency of fishing line can reach 13 thousand revolutions per minute depending on the producer of the braid for grass. In order to exclude mechanical and temperature damage to the gearbox, a special opening is provided for the introduction of ointments in its body. As a facilitating headset for the owner, during prolonged work, all modos models are equipped with a strong belt over the shoulder.

Cutting part of the motorcycle

Regardless of the manufacturer, almost every model comes with fishing line and steel knives.

The transverse section of PVC Lines for a trimmer for grass can vary from 1.5 to 3.0 mm.

Made from a durable polymer, during kosba it is subjected to intensive wear and, as a result, a break. Therefore, from time to time it is necessary to check the presence of a fishing line in the head and, if necessary, replace it. It is recommended to purchase an additional bobbin for quick replacement with a reel with a fishing line ending.


Gasoline trimmers for grass are very simple. The main element of the tool is a two.stroke or four.stroke internal combustion engine. It is connected by means of a gearbox with a shaft, which transfers an effort to a cutting element. The wire connecting them is hidden in a hollow rod. Also near the engine are a carburetor, air filter and starter (starter).

The lawn mower mowns the grass with fishing line or knife, which can rotate at a high speed of 10,000–13,000 revolutions per minute. The fishing line for the trimmer is installed on the head of the trimmer for the grass. The section section is from 1.5 to 3 mm. The main drawback of this type of cutting element is to rapid wear. As a result, you have to rewind or replace a fishing line for a trimmer, sometimes it is done with a change of bobbin.

A fishing line for a trimmer is most often used when mowing grass, and to remove shrubs and dense thickets, it is better to give preference to knives (disks). They can have a different shape and sharpening.

Knives and gearbox are covered with a protective casing, which ensures safety during operation. It has special holes through which lubrication is supplied. To make it more convenient to use a motorcycle, it has a fastener belt on it. It allows you to evenly distribute the weight of the unit, facilitating the work with it.

A handle is attached to the barn of the lawn mower, on which there are buttons and levers to control. The handle can be in the form U, D or T. For refueling a motorcycle with a two.stroke engine, a mixture is used, consisting of gasoline and oil. It must be poured into the fuel tank.

In four.stroke models, gasoline is poured into the fuel tank, and the oil separately into the crankcase.

Signs of common faults

Knowing the internal device of the lawn mower and the principle of its operation, you can easily eliminate the malfunctions with your own hands. Some breakdowns are most often found and they are distinguished as the main.

  • The engine malfunctions should be sought if the lawn mower does not work or does not even start. It is also worth paying attention to this part of the braids for grass, if during operation unusual noises are heard or strong vibration is felt. Clotting of the air filter can also lead to problems with the engine.
  • If the fuel does not enter the combustion chamber, then you should look for the cause in the suction of the fuel filter. It is also worth looking at it if the tool does not work at low speeds.
  • The starter’s grille was clogged. the reason for the engine overheating and its termination. The starter can also fail when the cord tears when it is too sharp.

Asseting device and common malfunctions

The easiest way to give the lawn mower for repairs, allocating a certain amount of funds from the family budget, operational and high.quality repair with your own hands is no less simple and convenient to understand the design of the lawn mower and fix all the problems.

The massive and piece manufacture of trimmers is based on the use of generally accepted technology, the typical design scheme consists of certain elements and parts, it is important to know them when carrying out independent repair work:

  • top part. The basis of the entire structure, where all important elements are collected, such as the starter, carburetor and the engine of the lawn mower;
  • middle part. Hollow rod, inside it is a cable connecting the engine and gearbox, which sets the cutting fishing line for the trimmer. In this part there are mounts for the distribution of weight of the entire structure and a belt for fixing a trimmer for grass on a belt of a person using a trimmer for grass for its intended purpose;
  • Bottom part. It has a gearbox and cutting elements that are hidden under a practical casing, which protects the user. The casing provides an increased level of safety, preventing large fractions of garbage, pebbles and glass in a person while working with a gas station.

Knowing the internal device and the principle of operation of the trimmer for grass, you can independently carry out repair measures for the design or replace individual unusability of the nodes using the repair instructions.

The most common and often encountered, subject to independent correction of the breakdown of the unit can be called the following problems:

  • engine malfunction, due to which the lawn mower is not started and does not work;
  • enhanced vibration of the bar motorcosa, which complicates its targeted use;
  • increased overheating of the gearbox, its accelerated heating during operation;
  • slow and weak functioning of the cutting fishing line at insufficient speeds;
  • the clogging of the starter grill causing the engine overheating and its refusal to work;
  • rapid and frequent clogging of the carburetor due to the use of poor.quality fuel;
  • clogging of the air filter in case of non.compliance with measures to care for the device.

All these problems can lead to the fact that the device will lose its ability to work before ordering the necessary spare parts for non.bosomeds should be carried out by a visual inspection and diagnosis of the device.

Special attention is required by individual spare parts and assemblies of the device, to verify them, you will not have to turn to a professional master, a complex of diagnostic measures will help to identify a consequence of the occurrence of a loss of performance.

Dismantling of gasoline braids for grass, lubrication of its parts and replacing faulty elements

To disassemble the lawn mower to carry out repair work, in general, the following devices will be needed:

  • set of screwdrivers (with different tips) and wretched keys;
  • a small puller for removing bearings;
  • special candle key;
  • a hammer.

In each case, you need to disassemble individual nodes.

It should be borne in mind that the starter (start.up) in a number of models is non.devastated. in this case, with problems with it, only replacing the element is possible. If the node is disassembled, then it can be repaired by removing and replacing the rope and the spring, or by installing the latter in place (when it exit from the gearing).

Analysis and replacement of the bar

Quite often it is required to repair a trimmer bar for grass. It is a design from such parts:

  • a drive shaft of steel, which has multifaceted or square slots on the upper and lower ends;
  • aluminum tubes;
  • plastic sleeve designed to maintain a centralized position of the drive shaft in the tube (so that there is no vibrations);
  • shock absorber made of rubber required for connecting the bar with the motor;
  • steering wheel with a handle used to control, and a stand, belt.

In some models, the shock absorber is between the steering rack and the bar. All control elements (lock lever, ignition switch, gas button) are located on the handle.

trimmer, grass, gasoline, disassembly, common

A conical angular gearbox is connected to the lower end of the bar, but some light models are available without it. This is due to the fact that their bar has a curved shape, and the shaft is a flexible cable.

How to disassemble the bar and then collect it to lubricate the shaft or its replacement, in detail is placed in the video further. In the same way they change the broken bar for a new.

Often it happens that the multifaceted or square slots of the drive shaft “lick”, while the working mechanism does not rotate or does it with a feather. Then the shaft is changed.

When a knock appears in the tube, you should disassemble the bar and check the condition of the sleeve, and if necessary, replace it. How to properly assemble a gas handle on a trimmer, is considered in the video below.

If there is no rod, suitable for installation, then you can pull the broken place with a clamp or apply the likeness of the tire. Such a measure is temporary, so you should make a replacement as soon as possible.

Clutch repair

When a knife or fishing line for a trimmer when operating the engine at idle is almost constantly spinning, and uncharacteristic sounds come from the front of the motor, this indicates a clutch clutch breakdown. The reason is a bursting spring. At the same time, the technique mows normally.

If there is a slip, then in addition, the pads have worn out.

The traffic trimmer is repaired as follows:

  • Remove the lid from the silencer;
  • remove a metal stand;
  • After remove the lids of the cylinder and the starter to gain access to clutch;
  • unscrew the side screws to remove the shock absorber lid;
  • They take out the tube from it, having previously let the tightening bolts;
  • unwind the clutch (presented in the photo further);
  • examine the condition of the spring, pads and bearings;
  • They cling to a new spring, passing the hooks into the corresponding holes;
  • To replace the pads, you need to remove the spring, and then unscrew the bolts on them.

If necessary, stop the crankshaft using, for example, ropes.

Repair of a gasoline engine, carburetor and gearbox

Malfunctions with the engine can be caused by problems with the piston system, seals, rings. To eliminate them, it is necessary to remove the drive motor.

To determine what exactly caused the breakdown is not easy. In the presence of a guarantee, the mechanism should be attributed to the service center for diagnosis and repair. If you turn to specialists for help, it should be borne in mind that the most commonly required to replace the piston rings. To do this, you need to disassemble the engine, get the piston. Do this in the following sequence:

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  • Remove the lid of the plastic case, unscrewing the screws or pressing the clamps;
  • disconnect the bar with the crankshaft;
  • Remove the cylinder head;
  • take out the piston and rings;
  • if necessary, they are replaced;
  • carry out the assembly in the reverse order.

The rings should be installed carefully, because they are quite fragile.

How the piston is placed and the seals are replaced during the repair of the engine, it is clearly shown in the videos further:

With regular use of the lawn mower, a gearbox may break. Histers, bearings wear out in it (they can also break). For this to happen infrequently, this node should be regularly lubricated. The frequency is almost always indicated in the operational instructions for the model used (at least once per season). A video below can serve as a repair instructions.

To grease the gearbox, unscrew the cork and simply squeeze out a suitable lubricant inside the node, scrolling off the shaft.

Your own carburetor can only be removed and cleaned, and also replace the gasket between it and the engine. The tightness of the node at home is determined quite problematic. The main thing is to properly assemble equipment after repair, so that the trimmer for the grass works without problems.

Signs of common faults

Knowing the internal device of the lawn mower and the principle of its operation, you can easily eliminate the malfunctions with your own hands. Some breakdowns are most often found and they are distinguished as the main.

  • The engine malfunctions should be sought if the lawn mower does not work or does not even start. It is also worth paying attention to this part of the braids for grass, if during operation unusual noises are heard or strong vibration is felt. Clotting of the air filter can also lead to problems with the engine.
  • If the fuel does not enter the combustion chamber, then you should look for the cause in the suction of the fuel filter. It is also worth looking at it if the tool does not work at low speeds.
  • The starter’s grille was clogged. the reason for the engine overheating and its termination. The starter can also fail when the cord tears when it is too sharp.

Malfunction. the knife does not rotate, the coil.

The reason is the wear of transmission elements.

The data transmission of the gasoline consists of a lower gearbox, shaft and upper gearbox (cup). Consider them in more detail.

The gearbox consists of a housing and a gear pair that are susceptible to wear.

This is due to the lack of lubrication in the gearbox.

Do not neglect this procedure during the operation of the lawn mower.

Lubrication control will extend the life of the gearbox.

There are sets of gears for these reducers on sale, but their cost exceeds 60-70% of the cost of the gearbox, moreover, the process of their replacement is laborious, a simple solution will be-replacing the gearbox with a new.

The transfer of traction from the engine to the gearbox is provided by a hard shaft, at the end of which there are slots. Due to the lack of lubrication in the gearbox, slots can be worn out. In this situation, only replacing the shaft with a new. Please note that there are 3 types of shafts (7 slits, 9 slits and “square”). The length of the shaft, as a rule, on such models 152mm. The replacement is very simple. we dismantle the old shaft. install the new.

A clutch cup is installed in the upper gearbox, on which there are slots under the shaft.

In case of wear, it will require its replacement.

The cup can be replaced both separately and the upper gear.

To remove the cup, it is necessary to remove the locking ring (p.49), catching his “ears” in the holes of the cup (n.48).

Please note that on the cup there are also options for the shaft (7 slots, 9 slits and “square”)

Clutch of a gasoline trimmer for grass

The knife or coil at idle rotates (subject to the “correct settings of the carburetor)

With such a malfunction, you will need to replace the clutch spring, or the adhesion assembly.

To replace the clutch, unscrew the upper transmission gearbox. Then unscrew the spark plug and suck the movement of the piston with a special stopper. Unscrew 2 clutch mounting screws (p.57) with washers (p.56), remove the clutch assembly and the washers under it (p.53). Change the spring on the clutch, or install a new. Do not forget to install the washers (p.53) then clutch, and twist the bolts (p.57) with engraver special washers (p.56).

How to disassemble a gearbox of a trimmer for grass

In order to disassemble a trimmer gearbox for grass, you need.

  • Remove the gearbox from the pipe, loosening two conjugate bolt under the gearbox.
  • Wash the gearbox with a brush, for example, in gasoline without oil and dry.
  • Run the ends of the locking ring and take it out.
  • The second stop ring and the second.
  • Then it is necessary to heat the trimmer gearbox for grass, the motorcosa gearbox or the reducer of the lawn mower by an industrial (technical) hairdryer at the temperature of the outgoing air at 600 ° C.
  • After that, strong blows of a wooden bar on the upper part of the gearbox, knock out a driven shaft with a bearing and a gear (first you should try to knock out bearings without heating). It is only necessary to hit a wooden bar, since a metal, for example, with a hammer, can be broken down by the case.
  • In the same way we remove the leading shaft with a bearing and a gear (we strongly heat the place where the bearings are sitting and with the blows of the wooden bar on the body of the shaft, we knock out the shaft with two bearings and the gear). How to disassemble a trimmer gearbox for grass, gearbox gearboxes and gearbox motokos. In order not to heat, you can try to use the set.

The assembly of the gearbox of a trimmer for the grass is carried out in the reverse order of disassembly (assembly after buying and replacing spare parts). It is much easier to collect a gearbox than to disassemble. everything is going, literally, with fingers. Sometimes you need to gently take up something, install stop rings and check whether the driven shaft is spinning by hand.

If you decide to replace the trimmer gearbox for the grass with not original, then in the new gearbox you should pay attention to the diameter of the pipe for which the gearbox (more than 25.4 mm or 26 mm) is intended, the diameter of the drive shaft (more than 8 mm), the size of the square shaft square (more often 5 mm or a star for 9 teeth) and security mounting on the gearbox, as well as on a nut (with left thread, more often M10x1.25).

If the engine does not start

When the lawn mower does not start, it is necessary to first check whether the fuel has ended in the tank. If everything is in order, then you need to check its quality. perhaps they purchased a cheap type of gasoline that does not fit the equipment. For braids for grass, it is best to use good gasoline, which is purchased at gas stations, the brand should not be lower than AI-92.

You should not save and purchase cheap fuel, as this will lead to the fact that the cylinder-piston group will fail, and you can spend much more money on repairs than high-quality gasoline.

It is also very important to properly prepare the fuel mixture and combine oil and gasoline in the right amount. The proportional ratio should be indicated in the leadership. That is why it is so important that it is written in Russian, because there is a possibility that different models of mowing requires several different proportions for successful functioning.

No need to use the fuel mixture in large volumes, since if you store an unused volume in the room for a long time, it will lose its properties. It is better to use a freshly prepared solution.

  • The problem in the engine’s operation can be fuel filter pollution. First of all, you have to check the filter. If necessary, replace it. The incoming pipe in no case should be left without a fuel filter. And at the same time it is worth checking the air filter. When contaminating it, it must be removed, washed in gasoline and put in place. If you are in the country or in a private house, it will be enough to rinse it in clean water, using various detergents. After that, rinse, squeeze and let it dry. The finished filter is wetted in a small amount of oil, which are used to prepare the mixture. Excesses are removed by compressing the filter with hands. Then the part can be set back.
  • If all these procedures have not helped and the engine still does not start, then you can try to adjust the speed at idle, for this begin to twist the carburetor screw. This is very similar to setting a similar part by car. If there is no experience in regulating the carburetor, then you can study the video on the Internet that are very understandable and affordable. They will clearly show how to adjust the carburetor of the lawn mower with your own hands.

Quick launch of the unit

Correct replacement of spark plugs

The fact that the spark plugs should be changed periodically, many people know, but few people do it correctly and in a certain sequence. To make all manipulations correctly, you should get acquainted with the correct order of actions.

    Stop the engine and wait until it becomes cold, otherwise you can get a strong burn.

  • The high.voltage wire is disconnected from the candle. We unscrew the candle with a special key. We examine the candle.
  • The part must be replaced if it is in a faulty state, very dirty, or a crack will be found on the case.
  • Check the gap between the electrodes. Their value should be 0.6 mm.
  • Put a new candle and tighten the key.
  • We install the high.voltage wire to the central electrode of the candle.

There is nothing complicated in this procedure, and absolutely any owner of a gasoline braid for grass can cope with it.

The lawn mower stalls after starting

The motor may stall after starting the device if the carburetor is incorrectly configured or it has been resolved. It’s very easy to identify. Vibrations may occur, which are clearly felt during operation. You can also make adjustment with your own hands, it is worth strictly implementing all the instructions written in the manual.

The motor can also stall due to the fact that the fuel valve has clogged. In this case, it must be cleaned, and then the problem will be eliminated.

If the braid for the grass started, and then sharply stalled, this means that the supply of fuel to the carburetor is difficult. It is necessary to loosen the valves of the carburetor, then the free approach of the fuel to it will be carried out in the required amount.

If an excessive air leak is observed, then the engine can also stall. A few revolutions should be added so that air bubbles come out of the fuel system. It is still necessary to check the integrity of the fuel hose. If any damage is found in it, then the part must be replaced immediately.

Dismantling the gearbox to check and replace lubrication and particles of wear

To do this, disconnect the casing and a bar with a shaft inside the gearbox. We remove the working body from the spindle, and wash the gear knot so that it is more convenient to disassemble. We unscrew the bolt, but it can be left in place, t. to. He does not carry any power load.

Then we remove the lead gear from the body. To do this, with the help of a special pull.up, we remove the locking ring from the ring slot, which holds the block of the drive gear in the right position in the case in the case.

Since bearings are installed in the nests with an interference with their outer ring, it is not easy to extract them. To facilitate this task, we heat the gearbox in the area of ​​bearings with a construction hairdryer.

As soon as the metal metal heats up, it will expand, and the tightness will disappear. Now you can easily extract from the body a block of the leading braid of a gear with two identical paired bearings.

We proceed to the extraction of the Bloc’s gear gear with the spindle from the gearbox. Here, first, we remove the centering sleeve with plots with narrow sponges, then the oil seal, pushing it with a screwdriver or some other tool suitable for this.

As well as in the first case, we pull out the holding part by squeezing it with the help of the locking rings, using the holes in the castle for this.

We heat the gearbox body with a hairdryer in the area of ​​the bearing of the bearing of the block of the driven gear and after a while we pull it out, slightly pulling the spindle.

In custody…

Having made sure that the gears, bearings, stop rings and the oil seal are in order, you can proceed to complete flushing and re.lubrication of the gearbox. In case of detection of damaged parts, they must be replaced with similar. Pay attention how many wear products are on the sides of the head body.

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Device, functions

The motorcosa gearbox transfers torque from the motor to the working (cutting) parts of the device.

This function is provided by the internal structure of the gearbox, which is a system of gears that lower or increase the speed of rotation of parts.

Gearboxes used for personal plots are:

  • wave;
  • cylindrical;
  • spiroid;
  • conical;
  • planetary;
  • worm;
  • combined.

This classification is based on the type of traction characteristic, namely the mechanical transmission of torque.

The gearboxes also differ in the form and dimensions of the landing hole: it can be square, round or starry. Of course, the most common gearboxes with a round landing place. At the location, the gearbox can be lower or upper.

For the normal operation of the mechanism, the lack of mechanical damage to the parts of the gearbox and maintaining a certain temperature regime is necessary. Any cracks, chips and overheating will lead to a malfunction and stopping of the lawn mower/trimmer for grass, which, in turn, will require the renovation of the gearbox. Regular lubrication of the mechanism can significantly reduce the risk of such problems and increase the life of a trimmer for grass.

Possible problems

There are several common malfunctions that are subject to the gearbox of the lawn mower.

  • Excessive heating. The reason for this problem may be the absence or lack of lubrication, an inappropriate brand of lubricating oil or indelibility of the details of the mechanism (if the gearbox is new). It is quite easy to eliminate such a malfunction-to lubricate (replace grease) with a sufficient amount of oil of a suitable brand or work with a trimmer for some time in a sparing mode with frequent stops.
  • Knocking when working, too much freedom of move and/or stopping during the rotation of the shaft. The prerequisites for the occurrence of such a malfunction can be: failure of a pair of bearings (due to the lack of or incorrect lubrication, excessive operation of the device) or their incorrect installation, as a result of which anthers are damaged. The solution to this problem is the analysis of the mechanism and the replacement of the spoiled parts for pre.ordered new.
  • Reducer staggering or flying from the main pipe. The reason is the improper consolidation of the details of the mechanism or the crack/chip of the body of a mechanical nature. There is only one way out. replace the gearbox body.
  • The problem of fixing the location of the gearbox. The root cause of such a phenomenon is the abrasion of the pipe section on which the part is attached. Larrier repair (for some time) consists in wrapping the place of planting the gearbox with textile isolet or replacing the main trimmer pipe for grass.
  • The trimmer knife for the grass does not spin (at all or at high loads), while unpleasant noises are heard. This malfunction can manifest due to the grinding of bumps of conical gears. The problem is eliminated by the analysis of the mechanism and the replacement of a pair of conical gears.

Cleaning nets in a muffler

Exhaust muffler is equipped with a net. an anti.icing screen. Over time, this grid clogs, spreading soot from burned oil and reducing the output power of the engine. This problem is solved by cleaning the grid with an old toothbrush, compressed air or a small wire brush.

As you see, the repair of the lawn mower with your own hands is not such a difficult matter and many malfunctions will be able to eliminate most of the malfunctions.

Additional questions about the maintenance of the lawn mower

Is it possible to leave the fuel stored in a benzocos? No, fuel should not be stored in the block. If the trimmer for the grass does not work for more than 30 days. drain the fuel and start the lawn mower and let it work until the engine stops.

What type of gasoline should be used? Most benzocosyles work on 92-octane gasoline. Never use gasoline with a smaller octane number or diesel fuel. Try to use freshly cooled gasoline and mix it with recommended oil for 2-stroke engines.

What is the correct gap of the spark plug? The gap of the spark plug on all engines is 0.fifty.6 mm.

Repair of the lawn mower. (changed, added).

So, dragged a benzo-cos, with symptoms: grasps but does not work.They pulled, her seals for about an hour. I say: Well, if, the maximum of the 5th time did not start, then the matter is clearly not in Babin, rather in the gasket.))).Sent deer behind beer. He said the repair price, they were compiled, although they twisted with nozzles for a long time))).

So. Disassembled. He made the Rotor’s shooter. Why do you need the Rotor’s shooter, but at least in order to remove the rotor normally. Those who write from “” Bat and nah shooter, I do not advise doing this: break the case, or the rotor will crack, bite the tsapfu or kill the tsapt carvings to death))).The procedure for detecting malfunctions in any benzoca or chainsaw:. check whether the spark is present. Should be strong and with smooth scrolling by the starter. If there is no spark, check the wires (on \ off), the candle itself and of course the short circuit itself. Often, due to broken bearings, the magnetic part of the coil sensor clings the rotor. When installing the ignition coil back, between the rotor and the coil magnet, put a piece of strip with a cut plastic bottle (to hold the gap), it should be in the rayon from 0.8 to 1 mm. But again, you need to look so that it does not catch the sensor. If even with a 1mm gap there is a shorting, then we change the bearings or the rotor itself (maybe a curve).Further, if the candle is constantly wet, this says that the carburetor shimmers! It is not advisable to climb into it (without knowledge). Everything is very fragile there and you can finally break firewood. It is better to replace with a new.

Do not start, grasps: often air leaks! We look at the intake pipe, he has it, almost from plastic! He is spinning over time, he cracks. Also pay attention to the integrity of the gasket, filter and the container itself, the case (there may be cracks).But the most common cause is the wear of the seals! It is not difficult to check: there will always be oil leak or finally everything in oil as in the photo above! You can check (whoever has a compressor) shut up the intake \ graduation channels to pass by spraying the seals with a soap solution and supply compressed air to the crankcase.You can change the oil seals without disassembling the housing, just lift the old special-hard-hardened or stiff bent wire.Do not score a new one, do not shove a screwdriver, or God forbid the sledgehammer. Having smeared the outer edge with a sealant with a slight effort, he must go. If we are tightly selected by the appropriate mandrel and with light blows in the area of ​​the metal clip, we sit in the place.Well, since they removed it, it is advisable to check the backlash of the bearings.If you removed the crankshaft, it is also not cost.effective to change the bearings on it! Better to change everything assembly! And save your nerves and a mower)))).If the mower is weakly drawn (does not have a power), it is advisable to look into the piston. To remove the piston, you need a specification (long hexagonal screwdrivers).Look like that’s it. Who does not know what, we will not be shy.In the course of disassembly, a flaw was revealed, namely a broken oil seal (punched through).The seals were replaced. Installed on additional sealant (window, very expensive and reliable). All gaskets are replaced.All threaded joints “sat down” on anaerobic sealant (Loquetay is popularly) blue.Everything was adjusted and wound up.And people already wanted to throw out))).Do not lose hope))).Good luck and good.