How to diagnose a lawn mower at home. Do-it-yourself grass trimmer repair, common causes of breakdowns

Trimmer repair is necessary when the device does not turn on or functions incorrectly. All owners of private houses and suburban areas are familiar with the problem of excessive vegetation, which is sometimes difficult to get rid of. As you know, progress does not stand still and new developments and useful inventions appear in all areas. This also affected Agriculture. You no longer need to mow the grass with old, inconvenient devices; modern gas mowers have come to the rescue, capable of getting rid of vegetation in the most inaccessible places.

With a gasoline trimmer you can mow the grass even in cloudy weather. look after personal plot Using this unit is very simple, and any adult man can cope with this activity.

Despite their versatility, like any equipment, trimmers tend to break and fail.

Not everyone can do the repair of a lawn mower with their own hands, because this requires repair skills electrical appliances, but today we will try to figure out how to start a trimmer without a starter and how you can generally debug its operation with your own hands.

Trimmer breakdowns and methods for eliminating them

Do-it-yourself trimmer repair involves eliminating all problems that interfere with the normal functioning of the unit. Among the most common are the following:

• breakdown of the CPG (cylinder-piston group) of the engine;
• the trimmer fails when trying to increase the operating speed;
• ignition coil failure;
• there is no connection between the motor and the gearbox;
• there are extraneous sounds during operation;
• the engine cannot reach the required speed.

Failure of the engine CPG can occur due to low quality fuel or wear and tear of engine parts. As you know, the piston group is lubricated thanks to the oil that is added to gasoline. In old oil, the lubricant precipitates out, which makes the oil unusable. If you continue to try to start the trimmer, you can ruin the motor in a matter of seconds, and this will entail additional costs for repairing the trimmer. This breakdown is considered the most expensive. To eliminate it, it is necessary to replace the piston group assembly; to be more precise, it may be necessary to replace the cylinder, rings, piston and seals. In such cases it is unlikely to be possible without additional help, unless you yourself are a master and know how to handle such equipment.

You can repair a lawn mower yourself if it starts and runs on idle speed, but then it choke when you try to increase the speed. To eliminate this breakdown, carburetor repair or cleaning of the muffler or gas filter is required. At first glance, everything is quite simple to solve, but if after you clean the clogged parts of the trimmer, it does not work, then additional diagnostics may be required.

Replacing the ignition coil

The main sign that the ignition coil has failed and trimmer repair is required is the absence of a spark at the spark plugs. In this case, it is very important not to rush to replace the coil; in most cases, the cause of the breakdown is a lack of contacts, a switch button that may have broken, or a problem in the spark plug itself. It definitely needs to be checked, perhaps there is current flowing somewhere or there are gaps or carbon deposits.

If the trimmer motor cannot reach the required speed, then it is likely that the air filter is clogged or there is debris in the motor itself. The solution to the problem is immediately clear - clean the engine and filter; in some cases, replacing the filter may be necessary.

Knocking and extraneous noise

During operation, most trimmer users encounter constant noise. If you hear a characteristic knocking sound, as if on metal, then it is likely that the engine in the trimmer is overheated or fuel is not passing through. To eliminate this sound, you need to add gasoline or turn off the mower for a short time.

You should not wear out the unit: if it constantly works for wear and tear, its service life will be shortened several times. If a knock is felt in the engine itself, then the cause lies in a malfunction of the piston, piston ring, worn cylinder or crankshaft bearing. To make the knocking noise disappear, you need to replace the failed part in the trimmer.

Sometimes it happens that the motor in the trimmer works normally, but the output shaft rotates very weakly or does not rotate at all. This is reflected in the fact that when the trimmer touches the grass, it stops working altogether and turns off.

To restore normal operation of the mower, you need to check 3 main components, namely:

• bushing;
• output cup;
• flexible or rigid shaft.

The gearbox is a very important component, so repair of the trimmer in this case must be carried out experienced craftsman, and to prevent similar breakdowns from happening in the future, the gearbox needs to be properly maintained.

Other common breakdowns

In addition to the above breakdowns, other failures also occur, for example, the power button sticks or the limiter falls off the mowing head. You can replace the power button using a soldering iron, and the limiter can be wound using copper wire. Have you noticed that the fishing line has broken or run out? It is enough to buy a new skein of the same diameter of fishing line and, having disassembled the drum, wind it onto the bobbin.

If you want your mower to work for a long time and without interruptions, then it needs to be constantly maintained; you can contact service centers or carry out diagnostics yourself.

To do this, you need to constantly check the rod bushings and change them if necessary, the same goes for the spark plug.

You constantly need to fill the gearbox with special lubricant, partially disassemble the motor part and clean it of accumulated dirt. In most cases, such trimmer maintenance is carried out according to a certain number of hours worked.

Now you are a little familiar with how to carry out repairs petrol trimmers without additional help. But it is worth noting that if you are not confident in your knowledge and skills, it is better to leave this matter to the professionals.

Repairing a petrol mower with your own hands, lubrication and maintenance. A petrol mower is one of the main tools of a summer resident, used to quickly bring land plot in order. Purchase this implement for mowing grass on garden territory and owners of private houses. The period of active use of lawn mowers and electric trimmers falls on summer period. Before use, the tool is brought into working condition: the rubbing parts are lubricated, the cutting set is changed, and it is poured into the tank fuel mixture. If the engine does not start at all or stalls quickly without starting sufficient quantity rpm, then you have to look for the causes of the problems and eliminate the identified problems. To repair a lawn mower with your own hands, you need to understand its structure and the operating principle of its main components. This information can be found in the operating instructions that the manufacturer must include with the garden equipment. Check for such a manual when purchasing a chainsaw. What to do if the engine does not start? If you cannot start the lawn mower, then the first thing you need to do is check the presence of fuel in the tank and its quality. To refuel the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which must be at least AI-92. Saving on cheap fuel can lead to breakdown of the cylinder-piston group, the repair of which can cost a third of the cost of the brush cutter itself. It is equally important to properly prepare the fuel mixture of gasoline and oil. The proportional ratio of these mixture components is indicated by the manufacturer in the manual. You should not prepare the fuel mixture in large volumes, as its properties are lost during long-term storage. It is better to use a freshly prepared mixture. A dirty fuel filter in the tank can also interfere with the operation of the trimmer's engine. Therefore, if you have problems starting the engine, check the condition of the filter. If necessary, replace the filter. Do not leave the inlet pipe without a fuel filter. The air filter also needs checking. If the part becomes dirty, remove it field conditions washed in gasoline and put in place. At the dacha or at home, the filter can be washed in water using detergents. After this, the filter is rinsed, wrung out and dried. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture. Excess oil is removed by squeezing the filter with your hands. The part is then installed in place. The removed cover is put back and secured with screws. Tips for quickly starting the unit So, in order: Place the tool on its side so that the air filter is at the top. With this arrangement of the chainsaw, the fuel mixture reaches exactly the bottom of the carburetor. The engine will start on the first try if you remove the air filter before starting and pour a few drops of the mixture into the carburetor, then install the dismantled parts in place. The method has been tested in practice. If the first tip does not work, then most likely the problem is in the spark plug. In this case, unscrew the spark plug and check its functionality, and also dry the combustion chamber. Replace a spark plug that shows no signs of life with a new one. If the spark plug is in good condition, the filters are clean and the fuel mixture is fresh, then you can use in a universal way starting the engine. Close the carburetor choke and pull the starter handle once. Then open the throttle and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.

The presence of a gasoline trimmer significantly simplifies life for those who often have to mow the grass around the house or in the garden, as well as make hay for animals. However, the simplicity of operation does not exclude the occurrence of malfunctions; moreover, the complexity of the mechanism entails the difficulty of repair. And service maintenance imposes additional costs on the instrument.

In order to extend the service life of the tool, preventive measures are necessary. For example, you should not overload the device; every time after 15 minutes, take a 10-minute rest. Do not neglect the operating rules and do not mow grass that exceeds the permissible height. If a breakdown occurs, do not rush to contact the service department, inspect the device to identify the cause, and perhaps you can actually repair the gasoline trimmer yourself, especially if you have some skill in working with equipment.

First, let's find out how to independently find the cause of a device malfunction, then we'll talk about why these breakdowns occur and how to fix them.

How to find a breakdown - symptoms

Despite the fact that a gasoline trimmer is a complex device, some breakdowns can be found and easily fixed without help service center or master.

Here are a few ways to diagnose a breakdown at home:

• First, check the spark, since without it there will be no ignition. If there is no spark, then the problem is in the spark plug, or in the ignition itself;
• Also, if the spark plug is dry, then the fuel supply probably needs repairs or carburetor cleaning;
• If the spark plug is filled with fuel, wipe it dry and try starting the tool again;
• If everything is in order, but the tool does not work, then most likely the problem is in the engine. If you do not know how to repair this part of the tool, then it is better to take the gasoline trimmer to a service center.

Of course, we all want to save money on the services of a specialist, but do not forget that they charge money for unique knowledge and experience that allows them to fix the trimmer with a 100% guarantee.

Frequent malfunctions

If you make a list of breakdowns that owners of gasoline trimmers most often encounter, it will look like this:

• Engine;
• Carburetor;
• Broken rod;
• Calm;
• Starter;
• Fuel supply;
• Air filter;
• Muffler;
• Gearbox.

Below we will try to help those who want to repair a gasoline trimmer with their own hands, using available tools.

Check the spark plug of the petrol trimmer - is it dry or filled with fuel?

Causes of breakdowns and repair methods

If, for example, the tool stalls immediately after starting or does not start at all, then pay attention to the ignition system:

1. Turn out the spark plug. If there are traces of a gasoline-oil mixture on it, it means the problem is caused by carburetor adjustment. Violation of the cold start rules in the form of pumping up fuel also leads to the spark plug being thrown, and the low quality of the gasoline used leaves thick layer black soot. In these cases, this part will need to be replaced. If the spark plug is dry, then the malfunction is related to the fuel supply.
2. The accumulation of dirt in the gas tank leads to supply hose clogged. Disconnect it - if fuel does not flow, then the fault is in clogged filter or breather, which is cleaned with a needle, but the first one needs to be completely changed from time to time to avoid complications. It is advisable to do this every 3 months.
3. In addition, gasoline trimmers often require replacement air filter, because if it becomes clogged, the fuel mixture is not rich enough.

1. Another cause of a malfunction of a gasoline trimmer may be muffler when soot accumulates in it. To eliminate such a malfunction, you can dismantle the part, wash it in kerosene or burn it with a burner. In general, before buying a trimmer, it is advisable to get acquainted with the chosen tool through reviews of other people. Most models have weak spots. This will allow you to protect yourself from a “pig in a poke” and prepare in advance for possible breakdowns.
2. There are often cases when, during operation, extraneous noises such as whistling and strumming are heard in the lower part. This indicates a risk of failure gearbox. Disassemble the housing and pay attention to the space inside the part, if there is no oil there, most likely this is the problem, lubricate the moving parts. If the action does not have the desired effect, then you will have to change the transmission gears or bearings. You can inspect the degree of wear right away, so as not to disassemble the tool several times.

In order to ask as little as possible how to repair the engine, carburetor or gearbox of a gasoline trimmer with your own hands, do not purchase less common models, because It will be extremely difficult to find parts for them, and prices from official dealers do not always correspond to the capabilities of buyers. If you are new to working with complex technical products, then it is better to contact the service department for help, because... Self-adjusting the carburetor, for example, can subsequently lead to combustion of the entire piston system. In addition, some parts cannot be repaired at all, and the entire unit must be replaced; manual repair in this case will not make sense. Also, do not rush to open the instrument body if it is under warranty.

To help, we can suggest you contact the services of a trimmer repairman, who can be found on one of the sites, for example, profi.ru - LINK (don't forget to select your city). At least, if the tool is repaired by a master, you can be confident in the result.

New petrol trimmers

If you can’t repair a gasoline trimmer yourself or it’s too expensive, then you should think about buying a new model, especially since today you can buy tools not only from European brands, but also inexpensive Chinese models. We have selected and made a selection of gasoline trimmers in different price categories from Aliexpress (only good ratings) and from several popular online stores.

A petrol mower is one of the main tools of a summer resident, used to quickly put a plot of land in order. Owners of private houses also purchase this tool for mowing grass in their gardens. The period of active use of lawn mowers and electric trimmers occurs in the summer. Before use, the tool is brought into working condition: the rubbing parts are lubricated, the cutting set is changed, and the fuel mixture is poured into the tank. If the engine does not start at all or stalls quickly without gaining enough revolutions, then you have to look for the causes of the problems and eliminate the identified problems. To repair a lawn mower with your own hands, you need to understand its structure and the operating principle of its main components. This information can be found in the operating instructions, which the manufacturer must include with the garden equipment. Check for such a manual when purchasing a chainsaw. Imported tool must be accompanied by instructions written in Russian.

A long tubular rod is attached to the gearbox of a two-stroke engine internal combustion. Inside the rod there is a shaft that transmits torque from the gasoline engine to the cutting mechanism. The line or knives rotate at a speed of 10,000 to 13,000 rpm. The protective housing of the gearbox has holes into which lubricant is injected using a syringe. For ease of use of the tool, the manufacturer equips it with a special adjustable strap that is thrown over the shoulder.

The cutting accessories are included with the lawn mowers:

• The fishing line, the thickness of which varies from 1.6 to 3 mm, is located in the trimmer head. When mowing grass, the line wears out. Changing fishing line is done quickly and easily in two ways: by winding fishing line of the same diameter onto a spool, or by installing a new spool with already wound fishing line.
• Steel knives with double-sided sharpening for trimmers for clearing the area of ​​weeds, small bushes, and coarse grass. Knives differ in shape and number of cutting surfaces.

A U-shaped, D-shaped or T-shaped handle attached to the bar contains the trimmer control levers. The cutting mechanism is protected by a special casing. Household brush cutters are fueled with a mixture prepared from gasoline and oil, which is poured into the fuel tank. The design of semi-professional and household lawn mowers equipped with a quadruple gasoline engine is slightly different. The refueling scheme is also different: oil is poured into the crankcase, and gasoline into the tank.

The measured piece of fishing line is folded so that one end is 15 cm longer than the other. We insert the loop into the slot on the reel and begin to wind in the direction indicated by the arrow

The engine of the lawn mower does not start, what should I do?

If you cannot start the lawn mower, then the first thing you need to do is check the presence of fuel in the tank and its quality. To refuel the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which must be at least AI-92. Saving on cheap fuel can lead to damage to the cylinder-piston group; repairing a lawn mower can cost a third of the cost of the lawn mower itself. It is equally important to properly prepare the fuel mixture of gasoline and oil. The proportional ratio of these mixture components is indicated by the manufacturer in the manual. You should not prepare the fuel mixture in large volumes, as its properties are lost during long-term storage. It is better to use a freshly prepared mixture.

When preparing the fuel mixture, pour oil into gasoline using a medical syringe, which allows you to accurately observe the required proportion components

A dirty fuel filter in the tank can also interfere with the operation of the trimmer's engine. Therefore, if you have problems starting the engine, check the condition of the filter. If necessary, replace the filter. Do not leave the inlet pipe without a fuel filter.

The air filter also needs checking. If the part becomes dirty, it is removed, washed in field conditions in gasoline and put back in place. At the dacha or at home, the filter can be washed in water using detergents. After this, the filter is rinsed, wrung out and dried. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture. Excess oil is removed by squeezing the filter with your hands. The part is then installed in place. The removed cover is put back and secured with screws.

The air filter, washed in the fuel mixture, wrung out and dried, is installed in place in a plastic case and closed with a lid.

You can see how this procedure is done in more detail in the video:

If all of the above procedures have been carried out, but the engine does not start, then adjust its idle speed by tightening the carburetor screw. The video posted at the beginning of the article focuses on this issue.

So, in order:

• Place the tool on its side so that the air filter is at the top. With this arrangement of the chainsaw, the fuel mixture reaches exactly the bottom of the carburetor. The engine will start on the first try if you remove the air filter before starting and pour a few drops of the mixture into the carburetor, then install the dismantled parts in place. The method has been tested in practice.
• If the first tip does not work, then most likely the problem is in the spark plug. In this case, unscrew the spark plug and check its functionality, and also dry the combustion chamber. Replace a spark plug that shows no signs of life with a new one.
• If the spark plug is in good condition, the filters are clean and the fuel mixture is fresh, then you can use the universal method of starting the engine. Close the carburetor choke and pull the starter handle once. Then open the throttle and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.

Some people pull the handle so hard that they have to repair the lawnmower starter with their own hands. This is only possible if the cable breaks or the cable handle breaks. In other cases, it is recommended to replace the starter. This unit is sold assembled.

Petrol mower: spark plug, do-it-yourself replacement

The work order is as follows:

• Stop the engine and wait until it cools down.
• Disconnect the high voltage wire from the spark plug.
• Unscrew the part using a special key.
• Inspect the spark plug for replacement. The part is replaced if it is faulty, heavily soiled, or has a crack in the body.
• Check the gap between the electrodes. Its value should be 0.6 mm.
• Tighten the new spark plug inserted into the engine with a wrench.
• Install the high-voltage wire on the central electrode of the spark plug.

As you can see, there is nothing super complicated in this procedure.

A new spark plug for a two-stroke internal combustion engine of a gasoline scythe is installed to replace an old part that has failed

Why does the lawn mower stall after starting?

After starting, the engine may stall if the carburetor is incorrectly configured or misadjusted. By what signs can we understand that the reason really lies in this? It’s very simple, based on the vibrations that will be clearly felt when the mower is operating. You can adjust the fuel supply yourself by following everything that is written in the operating instructions for the tool.

The engine may stall due to a clogged fuel valve. The cause can be eliminated by cleaning it. If the lawn mower starts up and then suddenly stalls, it means that the supply of fuel to the carburetor is obstructed. Loosen the carburetor valves to ensure free flow of fuel in the required quantity.

Excessive air leaks may also cause the engine to stall. Increase the engine speed to allow air bubbles to escape faster. fuel system unit. Also be sure to check the integrity of the fuel intake hose. If mechanical damage is detected (cracks, punctures, etc.), replace the part.

Storing lawn mowers and proper care

During operation of the lawn mower, monitor the condition of the engine cooling system. The channels in the starter housing, as well as the cylinder fins, must always be clean. If you ignore this requirement and continue to use the brush cutter, you can damage the engine due to overheating.

Proper care of a gasoline scythe during operation allows you to use it for several seasons in a row without carrying out major repairs to the gas scythe.

Allow the engine to cool before cleaning. Take a soft-bristled brush and scrub away any dirt from the outer surface. Cleansing plastic parts produced by solvents, including kerosene, or special detergents.

At the end of the summer season, the lawn mower must be prepared for long-term storage. To do this, the fuel mixture is drained from the tank. Then the engine is started to exhaust any remaining fuel in the carburetor. The entire instrument is thoroughly cleaned of dirt and sent to “hibernate.”

As you can see, repairing a lawn mower, troubleshooting and troubleshooting can be done with your own hands. You should contact service departments in case of serious breakdowns. In this case, you should clarify what the repair of a lawn mower will cost with the price of a new tool. It might be better to buy a new one.

An indispensable tool for a modern summer resident or owner of a private home is a lawn mower, which allows you to effectively and efficiently put the surrounding area in order. The period of active use of brush cutters is from late spring to October. Modern units are equipped with powerful and durable internal combustion engines, reinforced transmissions and main components. Despite this, physical deterioration, manufacturing defects or improper operation lead to failure of the trimmer. In order to repair a trimmer with your own hands, you must have at least basic knowledge in the field of technology and some experience in its repair.

The main component of any gasoline tool is the internal combustion engine (ICE), which, through in various ways transmits torque to the executive body. In a modern lawn mower, an alloy rod (pipe) is used as a transmission element between the motor and the trimmer head, inside which the drive shaft is located.

Petrol trimmer Husqvarna

Thanks to the high-speed engine, the rotation speed of the fishing line can reach 13 thousand revolutions per minute, depending on the manufacturer of the braid. In order to avoid mechanical and thermal damage to the gearbox, a special hole is provided in its housing for introducing lubricant in the form of ointments. To make it easier for the owner, the headset long work All models of brush cutters are equipped with a durable shoulder strap.

Cutting part of brush cutter

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

Trimmer cutting part

The cross-section of PVC trimmer line can vary from 1.5 to 3.0 mm.

Made of durable polymer, during mowing it is subject to intense wear and, as a result, breakage. Therefore, from time to time it is necessary to check the presence of fishing line in the head and, if necessary, replace it. It is recommended to purchase an additional bobbin to quickly replace it with a reel that has run out of line.

Controlling a lawn mower

Types of lawn mower handles

Trimmers with internal combustion engines on the market today are equipped with a D-shaped, U-shaped or T-shaped handle, where the main controls of the unit are located. For example, on a U-handle braid, the throttle key and stop/start toggle switch are located on the right handle. In the D-shaped design of the handle, the gas adjustment key is located directly on the rod.

Trimmer malfunctions and how to fix them

Due to the presence of many components and parts, repairing a trimmer with your own hands involves eliminating breakdowns that prevent it from normal operation. The most basic malfunctions of gasoline scythes should be noted:

1. The trimmer engine does not gain speed;
2. Failure of the cylinder-piston group (CPG);
3. Ignition faults;
4. There is no connection between the internal combustion engine and the trimmer head;
5. Mechanical knocks during operation of the unit.
6. Repair of CPG lawn mowers

The main component of any internal combustion engine is the cylinder-piston group (CPG), which can fail due to wear of parts or poor quality of the fuel mixture.

Trimmer problems

Lubrication of rubbing units in a lawn mower is carried out by adding a certain proportion of oil to gasoline. This process can be disrupted due to old oil falling out as sediment. In this situation, when starting the trimmer, the motor overheats greatly and in a matter of minutes the most expensive breakdown occurs. To resolve the problem you will need complete replacement CPG, namely: piston, oil seals, cylinder and piston rings. If you are not an internal combustion engine repair specialist and do not have experience working with technicians, then it is unlikely that you will be able to fix the engine without the help of a specialist. You can find out more about the stages of repairing a piston trimmer here.

Trimmer ignition troubleshooting

When the ignition of a lawn mower fails, the spark on the spark plug disappears and, as a result, the fuel mixture does not ignite.

Spit spark plug design

In this situation, it is quite important not to rush to replace the coil, since the cause of the breakdown may be the lack of contact in the switch on the control handle.

An important point when troubleshooting the trimmer ignition will be the diagnosis of the cross section, where the distance between the side and central electrodes should be 0.5-0.7 mm. In addition, it is necessary to pay attention to the steel sealing ring on the spark plug, loss of integrity or deformation of which can lead to etching of air from the combustion chamber and, as a result, a decrease in the power of the scythe.

Ignition flywheel with coil

If a replacement check of the electrical circuit, spark plug and its contacts does not give positive results, then you should pay attention to the trimmer ignition module, namely the gap with the flywheel. Regardless design features and the manufacturer of the lawn mower, the distance between the ignition coil and the flywheel should be no more and no less than 0.2 mm. To restore the optimal value of the gap, you will need to loosen the coil mounting bolts and use a special measuring probe to set the trimmer ignition.

Gasoline trimmer fuel system

A clear sign of a malfunction in the engine power supply system is the absence of traces of the fuel mixture on the spark plug electrodes, which may be due to the following defects:

Components of the trimmer fuel system

• due to a clogged hole in the gas tank, a vacuum is created, which prevents the normal flow of gasoline into the carburetor;
• due to the poor quality of the fuel and the ingress of foreign particles, the fuel filter installed in the tank is clogged;
• failure of the mixture to enter the combustion chamber as a result of carburetor clogging.

You can quickly determine the cause of the malfunction by dismantling the fuel hose leading to the carburetor. If the fuel mixture flows out in a thin stream, then you should pay attention to the carburetor. If there is no jet, it is necessary to clean the breather (a small hole in the gas tank cap) with a thin needle or replace the fuel filter.

Carburetor repair

If fuel enters the carburetor, it must be cleaned or adjusted. Adjusting the trimmer carburetor involves restoring optimal mixing of the fuel mixture.

Carburetor trimmer with adjustment screws

To do this, pay attention to three adjusting screws: maximum speed (H), minimum speed (L) and idle speed (LA). To start setting, you need to completely tighten screws H and L and loosen 1 turn each. Then we start the scythe and let it warm up for 10 minutes to adjust the power system in operating mode. After warming up the internal combustion engine, press the gas button all the way (12,000 rpm). We restore the idle speed by unscrewing the LA screw. As soon as the trimmer head begins to rotate, you need to tighten the screw until it stops.

Gasoline scythe exhaust system

Trimmer Exhaust System

One of the frequent malfunctions of a lawn mower is the incorrect operation of the internal combustion engine, namely a drop in power when the speed increases (the mower stalls).

The reason for this work is that the exhaust system is clogged with particles of burnt oil. Manufacturers often make mufflers prefabricated and cleaning is quite simple. If the design of the spark arrester is non-removable, then it must be placed in water with detergents, and then dried with a regular or industrial hair dryer. Frequent clogging of the exhaust system indicates non-compliance with the proportions of oil and gasoline.

Repairing lawn mowers with your own hands: breakdowns and methods for eliminating them was last modified: June 25th, 2018 by Administrator