Motokosa carburetor malfunctions and their elimination. Common malfunctions of carburetors

Repair of a trimmer carburetor for grass with your own hands video

Motokosa carburetor adjustment is a process that needs to be mastered for the full operation of a trimmer for grass. Trimmer for grass is a completely simple device that can break in only a few places and demand a mechanical repair or replacement of part. Adjustment of the carburetor device of the float.type motorcycles may require knowledge of certain subtleties. The nuances due to the model and the specifics of its functioning will ensure a clear mixing and supply regime of the fuel mixture.

CHAMPION BAS carburetor, how to adjust? This is just a trimmer for floating type grass. a common option designed to mix air and fuel in the proportions provided. The main problems arising during the operation of the motor are approximately similar to the problems that overtake the carburetor in the car:

• the motor can stall immediately after it managed to start. The reason is that gasoline is supplied in insufficient quantities. This is called “poor” fuel;
• Excessively fed gasoline leads to its incomplete combustion, excessive density of the mixture and uneconomous consumption.

Repair of the carburetor

Important! It is necessary to regulate the carburetor under different circumstances: a change in the temperature regime, octane fuel or type of oil, after winter or end of the run.in, load or spontaneous turning of the screws from strong vibration of the body. Some owners prefer to configure the module before each use to make sure of its correct work.

Do.it.yourself carburetor adjustment

Regardless of the model of the garden tool, adjusting the carburetor of the trimmer for grass requires careful preliminary preparation. The owner of the motorcycles will need to check the spark plug, air filter and the carburetor itself. In the case of pollution, all elements must be cleaned, or, if necessary, replace.

In the standard configuration of a trimmer for the grass, 3 adjusting bolt are provided. The first of them is marked with the letter L, and serves to configure the engine when it is working at low speeds. The second bolt. is marked with the letter H, and is necessary to adjust the internal combustion engine when it is at the highest speed. The third bolt can be marked with letters T or LA. with its help the operator can configure the engine operation at idle.

The process of configuring the carburetor Motokosa is as follows:

• First you need to carry out a number of actions with the adjusting bolt L. To do this, it should be turned clockwise until it stops. After this, the bolt L requires to turn half turnover in the opposite direction. This will make it possible to configure the optimal enrichment of the fuel mixture with oxygen during the operation of the motor at low speeds;
• Then you will need to adjust the operation of the internal combustion engine in idle mode. To do this, you need to turn the bolt T in different directions in turn until the mowing head or knife stops rotating;
• At the end, you will need to configure the level of fuel enrichment with oxygen when operating the engine at maximum speed. To do this, the bolt H will need to turn clockwise until it stops, and then return it to 1/2 turnover in the opposite direction.

At the end, the operator should drown out a trimmer motor for grass and start it again. If the knot was correctly configured, then the motor motorcycus will confidently gain momentum when pressed on the gas trigger, and quickly discard them when the trigger releases is released.

Principle of operation

The order of injection and filtering of fuel in the engine of the lawn mower is next.

• With the help of a throttle, the amount of air supplied to the diffuser is set. The more air is supplied, the more oxygen needs gasoline for combustion, and the greater the power released in the form of heat. The energy of the heat is further converted into a mechanical.
• The membrane pump pumps the required amount of gasoline.
• Next, gasoline passes through the engine fitting.
• Fuel passes through a retractable and exhaust valve.
• Fuel is filtered using a mesh filter.
• Through the needle valve, it also enters the camera with the membrane.

The stages of the carburetor is as follows.

• Air enters the pipeline with an air conditioning. The damper sets the desired air flow intensity.
• The diffuser is narrowed in the node of the gasoline bumping. this is necessary to give a higher air flow rate.
• Fuel passes through the bastard compartment and passes the jet, falls into this narrowing of the tube. The float compartment doses the supply of gasoline. In this compartment, the pressure is in a state of equilibrium. In a narrowed tube, it decreases. Due to the difference in both values ​​of pressure gasoline and passes through the jetler.
• Accelerated stream sprays gasoline, converting it into aerosol pairs. The resulting gas-air mixture is ready for a rowing in the combustion chamber.
• Having passed through the fuel pipeline, this mixture is in the cylinder of the carburetor.

Conclusion: To set the required power, first of all, you will adjust the rate of combustion of fuel using an air damper. If the gap is too small, and the oxygen in such a mixture is less than 10%. the fuel does not burn, therefore, the engine will not start or immediately staller.

In the case of buying a Chinese trimmer for grass, it is worth considering that it differs little from European- the same 2- or 4-stroke engine and drive.

However, the quality of the details is saved, forcing the consumer to change them more often. Check what compatible details offer non.Chinese companies for your device.

The main problems

Malfunctions of the carburetor Motokos or trimmer for grass, despite the relative simplicity of their elimination, sometimes require a long search by excluding. The main reasons are as follows:

Flamming fuel supercharger

The most repeating breakdown is wear, rupture of the membrane. As a result, its lavation. Fuel moves are not sealed at certain stages of the engine cycle. The reasons here are as follows:

• You have been working on a motorcycle or trimmer for too long without a break;
• Poor.quality fuel was seasoned;
• Wheelled gases fall into the pulse channel.

A deformed membrane is fraught with several bad consequences:

• not enough gasoline or oxygen in the created combustible mixture;
• the launch of the motor occurs after 10 or more unsuccessful attempts;
• the engine knocks, clats during operation, and t. D.;
• The working piston is deformed.

As a result, the internal space of the fuel pump is contaminated from the side of the pulse channel.

Ground of a mesh filter

The reasons for the clogging of the mesh filter are poor.quality fuel cleaning, damage to the hose and/or the injection head.

The failure of the adjustment lever

Wear of the contact edge of the lever. a consequence of not completely purified fuel, into which grains of sand or particles of clay, metal or other inclusions that are not soluble in liquid hydrocarbons fell. A problem with fuel injection appears, the motor does not function with interruptions without load.

The inlet needle is spoiled

The inlet needle breaks due to the presence of metal and stone particles in gasoline. As a result, the saddle of the intake needle tightly adjacent to it, the fuel mixture flows. In the combustible mixture created by the carburetor, there is too much air, which is why the motor can “sneeze” during operation. Finally, the needle can stop due to poor-quality gasoline, or the unit was idle for a long time.

Clogging the adjusting space

Deposits may accumulate in the adjustment compartment. The needle does not completely cover the hole, and a lot of gasoline enters the fuel chamber. the motor pours it, perhaps floods the spark plugs. Because of this, the gasoline mixture contains an increased number of vapor of gasoline. The efficiency falls noticeably.

The adjustment membrane is spoiled

The membrane is often deformed (sometimes torn) due to continuous operation of motorcycles or trimmer for grass for several hours. If you abuse such a “shock” mode of operation, damage to the membrane occurs more often. New breakdowns will be sprinkled from a cornation of abundance:

• the piston will break;
• The number of attempts by the unsuccessful start of the engine will increase sharply;
• The fuel mixture will contain too little gasoline;
• Useful (thermal) power will drop sharply.

The inlet regulatory lever sees

Sequeling of the adjusting lever. a consequence of the incorrect installation, random flexion. Contactive line will find an incorrect position. This will violate the additional injection of gasoline.

The damper has worn out

Throttle and air conditioning are unusable due to admission to the air flow of dust, metal particles, etc. D. Damaged shutters are similar to details subjected to streaming with sand. Due to wear of the damper, the efficiency of the motor decreases, breakdowns are detected. The piston and cylinder wear out.

The shutters become unusable due to incorrect service of the air filter or its breakdown.

In some cases, this filter is simply not suitable for your model motorcycles or trimmer for grass. In the end, the shaft of the motor will suffer. its pieces fall into the engine channels, which is why the piston will be broken.

The carburetor cannot be adjusted

The fact that the adjustment is too rough (it is not possible to accurately set the parameters) are to blame for the adjustment screws. The manufacturer Motokos or trimmer for grass can put excessively thick and hard springs. You can find others either in workshops where such equipment is repaired, or purchased from any dealer or official representative of the company who released the engine for your trimmer for grass or mechanical braid for grass.

The primer broke

Primer-a manual mini-pump for forced swinging fuel into a carburetor. For a successful start of the motor, it may be necessary to pump 20 ml of gasoline manually.

Determination of the causes of the malfunction

If the trimmer engine for grass does not start or stalls immediately after starting, when overheating or during the functioning of the device, extraneous noises are heard and vibration is clearly felt, it is important to perform a visual inspection and identify a non.working node.

To optimize preparatory measures before repairing, a simple diagnosis should be carried out and checked in stages:

• the presence of fuel in the tank and lubrication in the main nodes;
• serviceability of the spark plug and its performance;
• the purity of the fuel and air filter motorcycles;
• Cutting of the exhaust channel and the device’s saepun;
• The quality of the used fuel and lubricants.

To determine the functional performance of the ignition of the lawn mower, you should determine whether the candle works by testing the appearance of a spark in contact with the body of the functional device.

The spark plug itself can be changed to a new one, after driving the candle canal, if necessary, the old element is also dried, cleaned with special devices and returned to place.

Repair of the carburetor

During the inspection of the carburetor, it is worth paying attention to the possible course of the fuel used, to identify the problems of the carburetor, the following measures must be carried out:

• fuel hose purging to eliminate the possible clogging of the element;
• checking and replacing the gasket located between the engine and the carburetor;
• determination of tightness and maintaining constant pressure in the unit.

If necessary, it is possible to disassemble and thoroughly clean the node with your own hand, using gasoline, cleaning the nozzle and channels is used by compressed air.

The device of the carburetor of the lawn mower

The basis of the carburetor of the lawn mower is an aluminum corps. It has a diffuser (hole with internal contours). Air is pumped through this hole. The speed of oxygen (air) is dependent on the cross.sectional (passage opening) of the diffuser.

The diffuser is equipped with fuel channels. Fuel is drawn from them using air flow.

Launcher of the starter and gearbox

The gearbox conveys the rotational moment from the engine shaft to the cutting tool, its gears during operation should be absolutely clean and necessarily lubricated with special lubricant.

The starter is necessary to bring a trimmer for grass to working condition, its diagnosis is to check the tension of the lace of the starter coil with the teeth of the coil, which are often destroyed at a sharp launch.

A non.working starter in a benzocos is not subject to repair, it must be replaced with a working unit, as part of a mandatory inspection or a set of repair measures.

Separate attention and care require cutting elements that must always be cleaned of dirt and mowed grass after operation. Regular inspection and thorough preparation of the device for work will help to avoid expensive and costly repair time, always be sure of the operation of the lawn mower.

REPAIR OF LAVES: A review of malfunctions and effective methods for solving them. Photo instruction from pro!

Modern technologies and technology allow you to produce the best and optimal technical solutions that become effective assistants when arranging a summer cottage or personal plot.

Green lawn and other stands can grow rapidly, to put the house mowl is used to put in order and haircuts of lawns, which is differently called a motorcycle or a trimmer, a benzo-core.

Traditional braids for grass are inconvenient and unsafe in use, require significant expenditures and their own forces that will help to save law mowers that combine functionality and practicality in their design.

In the photo Benzosos, you can see various high.tech devices that have a complex of operational characteristics, including parameters such as increased performance and long service life.

A convenient and reliable trimmer for grass is a technical device consisting of individual mechanisms, details and elements that can be worn out, become unusable and damaged during intensive operation.

Even when conducting a regular technical inspection, care and care procedures, such devices and their individual parts require repair and even replacements, all repair procedures can be carried out independently.

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.

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.

Determination of the causes of the malfunction

If the trimmer engine for grass does not start or stalls immediately after starting, when overheating or during the functioning of the device, extraneous noises are heard and vibration is clearly felt, it is important to perform a visual inspection and identify a non.working node.

To optimize preparatory measures before repairing, a simple diagnosis should be carried out and checked in stages:

• the presence of fuel in the tank and lubrication in the main nodes;
• serviceability of the spark plug and its performance;
• the purity of the fuel and air filter motorcycles;
• Cutting of the exhaust channel and the device’s saepun;
• The quality of the used fuel and lubricants.

To determine the functional performance of the ignition of the lawn mower, you should determine whether the candle works by testing the appearance of a spark in contact with the body of the functional device.

The spark plug itself can be changed to a new one, after driving the candle canal, if necessary, the old element is also dried, cleaned with special devices and returned to place.

Repair of the carburetor

During the inspection of the carburetor, it is worth paying attention to the possible course of the fuel used, to identify the problems of the carburetor, the following measures must be carried out:

• fuel hose purging to eliminate the possible clogging of the element;
• checking and replacing the gasket located between the engine and the carburetor;
• determination of tightness and maintaining constant pressure in the unit.

If necessary, it is possible to disassemble and thoroughly clean the node with your own hand, using gasoline, cleaning the nozzle and channels is used by compressed air.

Launcher of the starter and gearbox

The gearbox conveys the rotational moment from the engine shaft to the cutting tool, its gears during operation should be absolutely clean and necessarily lubricated with special lubricant.

The starter is necessary to bring a trimmer for grass to working condition, its diagnosis is to check the tension of the lace of the starter coil with the teeth of the coil, which are often destroyed at a sharp launch.

Carburetor for a trimmer for grass: device and adjustment with your own hands

The carburetor is one of the most important assemblies of the lawn mower, the function of which is the preparation of the fuel mixture.

In case of sloppy handling of the tool, the carburetor may fail, which is why further work with a motorcycle is impossible.

To fix the tool with your own hands, you should study in detail the design, principle of operation and features of setting up the carburetor of a gasoline braid for grass with your own hands.

How is a gas mower carburetor?

The device of the carburetor is almost the same, both in famous German and Swedish motorcycle, and in Chinese.made tools. This node consists of such details:

• Membrane fuel pump;
• Adjustment system with atmospheric membrane;
• Idle system;
• A primer for pumping, which allows to facilitate the launch of the motor motorcycles;
• Elastic plate with two valves;
• Needle valve;
• Dosage system with a rotating rotor;
• Throwdoy damper.

Carburetors of modern motorcycles work according to a certain principle. The diagram below shows the movement of air and the fuel mixture in the design of the carburetor.

At first, air through the throttle falls into the tube, after which it passes to the diffuser. the place of narrowing of the tube, where the air flow becomes especially intense. From the diffuser of the air enters the float chamber, where it is mixed with the fuel mixture. After that, the fuel enriched with air is absorbed by the pipeline and enters the motor cylinder.

Adjustment of a trimmer carburetor for grass. how to configure correctly?

Before you configure the carburetor for motorcycles, you will need to clean all the air and fuel filters available in the design of the tool. Further adjustment of the carburetor is performed using three screws:

The correct procedure for adjusting the carburetor is as follows:

• First you need to find stable low revolutions of the gas mowing engine. To do this, slowly turn the “l” screw clockwise and against it. As soon as you determine the optimal low speed for the engine, turn the “l” screw by ¼ turn counterclockwise;
• Then you need to find the most stable operation of the engine at idle. To do this, use the screw “t”. Turning it clockwise, you increase the speed, and against it. lower them.
• The last step will be the adjustment of the high speed of the gas mowing engine. To do this, you will need to press and hold the gas trigger, and at this time transfer the lever of the throttle to the extreme position;
• After that, turn the “H” screw clockwise until you hear that the motor is as quiet as possible;
• Then turn the same screw in the opposite direction until you hear that the motor is working unevenly;
• Turn the “h” screw again clockwise until you hear the stable work of the motor.

After performing the listed actions, you need to check the engine of the lawn mower. In this case, special attention should be paid to his work at idle.

If you have completed the carburetor correctly, you will notice that the cold motor is stable, and the trimmer head has a large stroke reserve.

In this case, the hot engine does not show high speeds and works steadily when pressing the gas trigger.

What to do if the engine does not start?

If the lawn mower fails is not possible, then the first thing is to check the presence of fuel in the tank and its quality. For refueling the tool, it is recommended to use high-quality gasoline purchased at gas stations, the brand of which should not be lower than the AI-92. Savings on cheap fuel can lead to a breakdown of the cylinder-piston group, for the repair of which a third of the cost of Motokosa itself can take

It is equally important and correctly preparing a fuel mixture of gasoline and oil. The proportional ratio of these components of the mixture is indicated by the manufacturer in the manual

Do not prepare the fuel mixture in large volumes, since during long storage its properties are lost. It is better to use a freshly prepared mixture.

When preparing the fuel mixture, pour the oil into gasoline using a medical syringe that allows you to accurately comply with the necessary proportion of the components

Fuel filter pollution in the tank may also prevent the operation of the lawn mower engine. Therefore, when problems with the launch of the motor, check the condition of the filter. If necessary, replace the filter. It is forbidden to leave the incoming pipe without a fuel filter.

The air filter also needs to be in the test. During contamination, the part is removed, in the field is washed in gasoline and put in place. In the country or at home, the filter can be washed in water using detergents. After that, the filter rinses, squeezes and dries. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture. Excess oils are removed by compressing the filter with hands. Then the part is installed in place. The removed cover is placed back and fixed with screws.

The air filter washed in the fuel mixture, squeezed and dried, is installed in place in the plastic case and covered with a lid

How this procedure is done in more detail you can look at

If all of the above procedures are carried out, and the engine is not started, then adjust its revolutions at idle, twisting the carburetor screw

In the video posted at the beginning of the article, attention is paid to this issue

Signs of unbalancing

Carburetor debugging is necessarily carried out in the manufacture of the device. As a rule, the owners will learn about the need to adjust the fuel supply with their own hands only after quite serious breakdowns, in the process of correcting which, the module was removed and, for example, cleaned.

Signs of failure in the settings are the following:

• starts up, but immediately stalls the engine. since the engine can only work when a certain amount of gasoline is supplied, with too “poor” fuel, that is, overlapping the supply channel, the motor will stop;
• too much fuel consumption, many exhaust gases. the result of incomplete combustion of the mixture. In this case, the fuel, on the contrary, is too much and the mixture is excessively dense.

STIHL, Makita, Husqvarna and others tuned with adjusting screws. Sometimes the reason for disrupting the work is a violation of fixation-due to vibration or damage to the protective cap. Such a breakdown can be found only by trying to turn the screw a little: if the fixation is not stiff, it is worth checking the setting.

Do.it.yourself carburetor adjustment

The setting of the module does not apply to the repair and the change of spare parts is not required. In this case, the armored complex of the carburetor of the lawn mower will not be needed.

• L. is regulated first, as it is responsible for supplying fuel at low speeds;
• H. he is responsible for supplying gasoline at high speeds, as well as for fuel consumption and temperature;
• T. with it, the idle speed is debugged.

There are options, as a rule, this is a carburetor of a Chinese lawn mower, when only one screw remains for debugging on the case. to configure idle. This does not mean that the module is configured automatically. this means that even such a type of repair as debugging will be difficult to carry out. In the photo. adjusting the carburetor of the Chinese lawn mower.

• The module tuning is carried out only with a heated engine: for this, the device is pre.included for 10 minutes. If the mowing head rotates at idle, then they begin to debugged immediately: turn the screw T counts the clock until the rotation stops.
• Adjustment starts with a screw l. The screw turns to the right and to the left until it finds such a position in which the idle speed does not become maximum.
• Then the screw is turned on ¼ turn against the watch. This will be his working position.
• The idle stroke must be configured by turns against the sentry to increase the number of revolutions and the clock. to reduce. Its debugging consists in achieving such a regime in which a sufficient number of revolutions are performed before the rotation of the mowing head. In this case, the engine should operate steadily at different positions.
• The position of the screw L is determined by the latter. at maximum speed the trimmer for grass should not work for more than 10 seconds. The throttle opens, the screw is closed clockwork, very slowly, until a decrease in the number of revolutions is established by ear.
• Then also slowly the screw rotates against the sentry until the engine starts to work with failures. After which the screw is on the time, until the engine again works normally.

If there is a tanometer, and if the product is indicated in the product passport, coooreecration can be carried out more accurate, focusing not by ear, but on the testimony of the device.

Adjustment of the carburetor of the lawn mower in the video is carried out by ear.

7 Комментарии и мнения владельцев on the record “Adjusting and repair of the carburetor of the lawn mower”

Please clarify. In the section adjustment p.5, screw l. error? You should read the screw a? Thanks to.

Tell me the initial position of the screws h l la

Tell me the initial position of the screws h l la

Thank you very much for the video about the accelerator and did not know and the defect is very important and creates a huge problem about which almost everyone is silent. BRAVO….

Maybe all the same tachometer of the revolution meter, and not a tonometer of the blood pressure meter

The heart of any chainsaw is a two.stroke internal combustion engine.

There was a need to acquire a reliable and true mechanical pom.

The trimmer for grass does not apply to complex household appliances, so most of its gender.

The past times of Soviet agricultural giantomania have gone. The gig disappeared.

The same.based tractor is an economical version of the tractor for small in terms of work

The Neva Unoa Tractor is produced today in different modifications, this specializers.

Carburetor adjustment on a benzocos

DIY diagnostics and adjustment with your own hands can take only a few minutes.

Wash the filters before it (see. instructions). You can set the carburetor yourself with the help of three adjusting screws.

To do everything right, run the motor. Your actions are as follows.

• Find limit speed at idle. To do this, unscrew the screw l to the right, and then to the left. Turning step. a quarter of turning counterclockwise.
• Using the screw t, you can configure the idle speed of the motor: increasing when rotating the screw clockwise, decrease. on the contrary. The adjusted engine confidently works without load and without warming up. Heated. does not overestimate the moment.
• If you set up not a motorcycle, but a trimmer for grass, then the rotor of the screw t sets a greater margin of turnover per minute. For devices of both types, stable turns are set when choosing a mowing height with a knife (or fishing line).
• The last rotate the screw h. He sets the rate of supply of gasoline with air at maximum speed, engine power, motor heating temperature and fuel consumption.

To configure the motor from the screw h, do the following.

• Open the throttle and squeeze the gas at maximum speeds.
• Twist the screw h clockwise until the engine speeds are reduced.
• Twist slowly the same screw counterclockwise until the engine gives out unstable speeds.
• Take the screw back a little (clockwise) until the engine earns smoothly. It is important to catch this line.

The result of the exact adjustment is the complete combustion of fuel and the white-brownish color of the spark plug. The candle flooded with gasoline is much darker than the unbearable.

How to adjust the carburetor of the lawn mower, see further.

Carburetor for a trimmer for grass

Stable and effective work of the household trimmer for grass largely depends on the quality of the fuel operator used by it. The refueling fuel mixture should be enriched with air. for this, a built.in carburetor is responsible in the basic device. This node is one of the main elements of a braid for grass, so the operator must constantly monitor its serviceability and settings. Otherwise, the trimmer for the grass will lose its performance and may completely fail.

The standard design of any gasoline trimmer for grass must include a fuel system, the basis of which is the action of a standard carburetor. Its device and the initial principle of action are almost the same for all motos, regardless of their design characteristics and purpose.

The carburetor of the motorcycles consists of an entire.metal aluminum corps, which protects the internal components of the node from moisture, fine debris and dust. In the lower part of the case, a built.in diffuser is provided, the second name of which is “Venturi’s nozzle”. The main function of this regular part is the supply of air in the amount that is required by the fuel node to enrich the fuel. Diffusure work on a simple principle: the smaller its diameter becomes, the more intensively the air is absorbed. This is due to the fact that in the zone of the smallest diameter the level of air discharge becomes maximum.

The upper part of the built.in factory diffuser is pre.equipped with fuel tubes, according to which, under the influence of air, the fuel mixture is delayed. The remaining parts of the carburetor: regular adjusting screws and fuel pump can be located both inside and outside the carburetor.

The device of the carburetor Motokosa includes a throttle, the main task of which is to adjust the volumes of absorbed air. The larger the amount of air, the higher the rated power of the power unit of the trimmer for grass. Another damper function is to relieve the cold start of the engine. If the lawn mower is started for the first time after prolonged downtime, then the damper must be closed. Immediately after starting the motor, the part must be opened, otherwise the ICE will stall.

The carburetor for a trimmer for grass is equipped with a pulsed channel, which connects the internal cavity of the ICE crankcase with the pulse chamber of the pump. The piston located in the motor cylinder creates reciprocating movements, which leads to phased changes in pressure inside the crankcase. At the same time, a membrane is set in motion. Thus, the action of the pump is completely synchronized with the operation of the power unit.

A standard carburetor membrane takes an active part in the fuel suction. In the fuel node, it gets through the fitting. After that, the fuel passes through the built.in intake and exhaust valve, then through the mesh filter and fuel tube. Then the fuel flows next to the needle and gradually fills the camera equipped with a control membrane.

The standard valve of the carburetor trimmer for the grass is connected to the membrane using a lever. Below the built.in membrane is a cavity into which the air is absorbed through a special hole.

The carburetor for the lawn mower is working on this principle in stages. This ensures the continuous operation of the fuel unit and the uninterrupted supply of fuel in the cylinder of the standard power unit.

The principle of operation of the carburetor of the lawn mower

The throttle dashes determines the amount of air for supply, and the engine power directly depends on this.

Fuel is sucked into the carburetor system (its membrane). Then passes through the fitting in the carburetor. Next, the liquid moves through the intake and exhaust valve of the pump. Filtered with a net. The needle valve moves into the membrane chamber.

• Air supply to the tube with an air septum (damper). The partition regulates the intensity of the air flow.
• The fuel supply system is necessarily narrowed by a diffuser to increase the flow rate.
• Gasoline through the float chamber and nozzle with narrowing. The chamber with a float regulates the temporary volume of gasoline. In the float chamber, the pressure level is neutral, and in the tube with narrowing is already low. Thanks to the pressure drop, fuel penetrates through the jetler.
• Air flow acceleration contributes to the transfer of fuel (gasoline) and its spray. As a result, the air-fuel mixture of the necessary proportion or density is formed.
• The air-fuel mixture penetrates the engine cylinder through the fuel tube.

The level of air density in the system depends on the area of ​​the open air damper. The wider the damper is, the greater the fuel consumption and power.

Simply put, adjusting the carburetor on a benzocos. creating an optimal fuel mixture due to the correct air supply.

How to adjust a carburetor on a gas tank

Before adjustment, it is necessary to carefully clean the filters according to the maintenance in the instructions.

Further configuration of the carburetor of the lawn mower with your own hands is performed by adjusting screws. There are three of them:

Right (l). adjustment of the fuel mixture for low revolutions.

You need to find the maximum speed at idle. To do this, they slowly turn the screw (l) to the right and left.

For adjustment, the screw is rotated by a quarter of turning must be counterclockwise.

Lower (t). is responsible for adjusting the engine at idle.

For proper adjustment of the idle, it is characteristic:

• Sustainable operation of a cold engine;
• non.high speed of the hot engine;
• for a trimmer head, a large supply supply;
• Sustainable engine operation when changing positions (sharp rise or descent of a knife).

Left (H). adjusting the mixture at high speeds. (The screw is set up last).

The overall adjustment of the maximum revolutions, engine power, temperature and gas consumption depends on the left screw (H).

Setting a carburetor of a lawn mower with a last screw is performed as follows:

• Open the throttle to the full, while issuing a full gas. Turn the screw clock until the speeds fall (in this case, they are oriented by ear).
• Turn the screw as slowly against the clock until the non.uneven operation of the engine.
• Then turn back very little, barely hearing a stable, even work.
• For more visual use of skills, it is more convenient to consider the work of an experienced user:

It is interesting that from the point of view of the author of the video, the configuration (its correctness) is determined by the color of the candle, and not just by the speed and stability of the engine.

Correct tuning of the carburetor with your own hands in this case-combustion of the fuel mixture without a residue, the color of the candle should be light brown.

Diagnosis of magneto

Magneto key node in engine ignition systems. This is the core of the coil, which is surrounded by the primary and then secondary winding. If this part is faulty, there is no spark on the spark plug and the fuel will not light.

Operating principle

When a flywheel spins, an electric current forms in a magneto, creating a spark on a spark plug when the magnets pass under the coil.

The second method

If you cannot use the tester, there is another way to check. In this case, it is important not to touch the cylinder with an electrode, otherwise the coil will be damaged.

• Remove the spark plug lid. Do not unscrew the fork, as this will save compression.
• Then you need to choose a nail with a cap taken and tightly insert it into the hat.
• Further, the lid with the nail should be reliably tied to the cylinder by the dielectric. In this case, the electrode should be at a distance of 5.5-7 mm from the cylinder body, but not touch the mass.
• Then, using the starter, you need to imitate the start of the engine with the ignition button. In this case, you need to carefully monitor the spark, and try to determine its color.

There is one important point that should be taken into account when diagnostics: non.guns of Magnito in any condition can create a powerful spark. However, if it is faulty, then after warming up it will stop creating a current, and the trimmer will not start for the grass. Later, after cooling, the coil returns to the working level, the unoic tractor turns on and works for some time at idle or under load until the temperature of the magneto increases again. In this case, the part must be replaced.

Read how to properly sharpen a disc for a trimmer for grass

Elimination methods

The list of future work on the engine may be like this:

• Replacement of the fuel pump;
• Disassembly and washing of the strainer;
• Replacement of the adjusting lever;
• It is also necessary to clean the space for regulation;
• Replacing the membrane (or the entire block where this membrane is located)
• Regulation of intake, output and needle valves;
• Replacement of dampers;
• Cleaning of fuel channels and diffuser;
• Replacing screw springs
• Changing the primer.

Read how to use a circular saw correctly

Not all this work can be done. It is often that many of them are not needed if a specific malfunction is immediately discovered.