How to Set Up Stihl Lawnmower Turnover

Adjustment Summary carburetor lawn mowers.

The trimmer does not belong to complex household appliances, so most of its breakdowns are mechanical in nature and can be successfully repaired with their own hands. Even if the engine fails for serious reasons. damage to the piston ring, for example, repair comes down to replacing the part.

But even with a relatively simple design, such a part of the device as a carburetor needs to be adjusted.

How to Set Up Stihl Lawnmower Turnover

Principle of operation

Carburetor. a power system module in which liquid fuel and air are mixed before being fed into the engine cylinders. Depending on the tool and its operating mode, mixing and feeding are adjusted accordingly.

The carburetor device for lawn mowers is the same for almost all cases. It belongs to the category of float devices. The latter provide stable parameters of the finished mixtures.

The principle of operation of the module is as follows.

  • Air enters the body of the tube with an air damper. The latter enhances or reduces air flow depending on its position.
  • In the area where the hole for supplying gasoline is formed, the tube has a constriction. a diffuser. Here the flow rate increases.
  • Fuel from the float chamber through the nozzle is fed into the tube. The float level determines the amount of fuel supplied. Since the pressure in the chamber is normal and low in the tube due to the greater dilution of air, gasoline is sucked through the nozzle.
  • Accelerated airflow picks up fuel and atomizes it, forming an air-fuel mixture of the desired density.
  • The mixture is sucked into the cylinder through a pipe.

The more open the air damper in the tube, the higher the density of the air flow, which means that more fuel enters the cylinder. Setting the carburetor of the lawn mowers is reduced to setting such a ratio of dampers at which the density of the fuel mixture becomes optimal.

Signs of imbalance

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

Signs of a failure in the settings are as follows:

  • it starts, but the engine stalls right away. since the engine can only work when a certain amount of gasoline is supplied, if the fuel is too “poor”, that is, when the feed channel is blocked, the motor will stop;
  • too much fuel consumption, a lot of exhaust gases. the result of incomplete combustion of the mixture. In this case, on the contrary, there is too much fuel and the mixture turns out to be excessively dense.

Adjustment carb carb lawn mowers. Practice

Right carb settings determined by the operation of the engine and the color of the candle. Adjusted.

Insidious malfunction carburetor chinese lawn mowers

Spare parts for lawn mowing Repair and adjustment carburetor lawn mowers.

The carburetor of the Stihl, Makita, Husqvarna and others lawn mowers is adjusted using the adjusting screws. Sometimes the reason for the disorder of the work is a violation of fixation. due to vibration or damage to the protective cap. Such a breakdown can be detected simply by trying to turn the screw a little: if the fixation is not rigid, it is worth checking the setting.

Carb adjustment lawn mowers do it yourself

Customization the module does not apply to repair and replacement of spare parts is not required. In this case, the repair kit for the carburetor lawn mowers will not be needed.

There are three screws for debugging:

  • L. is regulated first, since it is responsible for supplying fuel at low speeds;
  • H. he is responsible for the supply of gasoline at high speeds, as well as for fuel consumption and temperature;
  • T. with its help idle debugging is carried out.

There are options, as a rule, this is a Chinese lawn mowing carburetor, when there is only one screw left for debugging on the case. to adjust the idle speed. This does not mean that the module is automatically configured. it means that it will be difficult to carry out even a type of repair such as debugging. In the photo. carburetor adjustment of the Chinese lawn mowers.

  1. Setting up the module is carried out only when the engine is warm: for this, the device is first turned on for 10 minutes. If the mowing head rotates at idle, then proceed with debugging immediately: turn screw T counter-clockwise arrows until rotation stops.
  2. Adjustment starts with screw L. The screw rotates left and right until it finds its position at which idle speed does not become maximum.
  3. Then turn the screw на turn counterclockwise. This will be his working position.
  4. Idling must be adjusted by turning counterclockwise to increase the speed and clockwise to decrease. Its debugging consists in the achievement of such a mode in which a sufficient number of revolutions is made before the mowing head begins to rotate. In this case, the engine must work stably in different positions.
  5. The position of the screw L is determined last. at maximum speeds the trimmer should not work for more than 10 seconds. The throttle opens, the screw turns clockwise, very slowly, until a decrease in the number of revolutions is established by ear.
  6. Then, the screw also rotates slowly counterclockwise until the motor starts to malfunction. Then the screw is turned back clockwise until the engine starts working again normally.

If there is a tanometer, and if the recommended revolutions are indicated in the product passport, the correction can be made more accurate, focusing not on the ear, but on the readings of the device.

6 comments on the adjustment and repair of the carburetor lawn mowers

Please clarify. In the adjustment section of clause 5, screw L error? Should I read screw A? Thank you

  • tell me the initial position of the screws H L LA
  • TIP THE INITIAL POSITION
  • tell me the initial position of the screws H L LA

Thank you very much for the video about the accelerator and I don’t know, and the defect is very important and creates a huge problem about which almost everyone is silent. BRAVO.

Maybe all the same, a tachometer is a speed meter, and not a tonometer, a blood pressure meter

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

There was a need to purchase a reliable and faithful mechanical aids.

Gone are the days of the Soviet agro-industrial gigantomania. They made a gig.

  1. The trimmer does not belong to complex household appliances, so most of it is gender.
  2. a tiller is an economical tractor option for small jobs.
  3. Tiller Neva today is available in various versions, this one is specialized.

Carburetor Adjustment Lawn Mowers: Highlights

Despite the high productivity, mobility and unpretentiousness in work, modern lawn mowers are difficult to attribute to complex devices. Over time, any mechanism undergoes wear, and therefore parts and assemblies require special attention of the owner.

One of the elements of the trimmer is a carburetor, designed to form a fuel mixture and its supply to the combustion chamber.

Increased consumption with proper proportions of gasoline and oil or a drop in engine power indicate the need to adjust the carburetor of the gas trimmer.

Trimmer carb setting

The initial step in restoring the correct operation of the fuel system is to clean the air filter.

Screw trimmer carburetor

Experts recommend rinsing it every 10-15 hours in a solution of water with detergents. Direct adjustment of the trimmer carburetor is carried out by three adjusting screws:

  • fuel feed adjustment screw (“L”);
  • high speed adjustment screw (“H”);
  • the screw responsible for the engine idling (“T” or “AT”).

Adjusting the fuel supply at minimum speed

Before starting the carburetor adjustment of the benzotrimmer, it is necessary to warm the engine to operating temperature.

Fuel Adjustment Screws

To do this, start the engine and at idle let him work 10-15 minutes. At the first stage, with the trimmer working, slowly tighten the screw “L” until the beginning of intermittent operation or until it dies.

Next, unscrew the screw by ¼ turn and check the speed of maximum speed. If the lawn mower easily and quickly reaches high speeds, this will be the most economical mode.

In most models on the market, the fuel screw “L” is screwed in clockwise, however, there are trim tabs where the decrease and increase in the mixture flow occurs in the reverse order.

Trimmer idle setting

Location of carburetor adjustment screws

The screw "T" ("AT") serves as a limiter of the reciprocating movement of the fuel damper and when it is twisted, an increase in engine speed occurs, and unscrewing leads to a decrease in the speed of the crankshaft.

Professionals advise adjusting the idle screw of the lawn mowers so that the ICE works a little faster at minimum speed, but the head with the fishing line or knife remains motionless.

If it is difficult to start the trimmer “cold” after the manipulations, then it is enough to tighten the “T” screw a quarter of a turn and try to start the engine again.

Adjustment of the propeller

After restoring the fuel supply at minimum speed and adjusting the idle speed, it is necessary to check the stability of the mechanism at an increased speed.

Setting at maximum speed

Adjustment of the motor at high speeds is carried out in order to protect against overheating and reduce hand fatigue when pressing the accelerator key. If the internal combustion engine is unstable at maximum speed, then screw “H” must be slowly turned in to ensure smooth and clear operation.

During operation of the lawn mowers, it may be necessary to adjust the fuel feed screw (“L”) for an optimal set of revolutions.

Tips for repairing a carb trimmer

  1. Regardless of the manufacturer, there is a factory defect of the carburetor parts of the lawn mowers.

Adjusting screw spring

For example, the adjustment method described above may not give positive results with an excessively large number of turns at the spring of the mixture feed screw and, as a result, the impossibility of optimally reducing the level of gasoline supplied. To eliminate this, you can independently shorten the spring yourself or purchase a new one in accordance with the instruction manual.

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Many owners of lawn mowers when buying oil follow the recommendations indicated there for the preparation of the fuel mixture.

Oil for gas trimmer

So, often the information on mixing gasoline and oil indicated on the bank differs from the indications in the trimmer’s passport. As a result, black soot can quickly form on the spark plug, which leads to a drop in power and an increase in fuel consumption.

Therefore, when preparing the working mixture, the recommendations specified in the instruction manual should be followed. In most cases, the proportion for a run-in ICE is 1:25.

It is worth noting that many owners of the tool prefer to cook fuel “by eye”, which will inevitably lead to rapid wear of the piston spit in case of a reduced portion of oil and the formation of soot on the spark plug with an increased amount of lubricant.

  • The correct tips for setting up the trimmer carburetor correctly performed above will help to avoid not only engine overheating and increased fuel consumption, but also significantly increase the life of other parts and components of the tool. Pay attention to the operation of the lawn mowers in all modes and timely carry out regulated maintenance and repair of the tool.
  • Carburetor Adjustment Lawn Mowers: Highlights was last modified: June 25th, 2018 by Administrator

    How to Adjust the Needle on a Trimmer Carb

    Do-it-yourself carburetor adjustment for lawn mowing

    lawn mowers, like all gasoline powered tools for the garden, are not difficult to maintain. It is possible and necessary to repair, configure without the help of others. For example, carburetor adjustment do it yourself. it’s 5 minutes.

    Lawn mowing carburetor is a unit in the power system. In it, like all carburetors, there is a process of mixing air and fuel (gasoline) for the upcoming supply to the engine cylinders.

    The main thing in this process is the correct proportion of fuel and air, which is why the carburetor is regulated.

    The main problems and malfunctions of the carburetor

    Strainer There are only two tasks with this element:

    In order to find out the cause of the breakdown, the fuel filter cover is unscrewed to remove the strainer. How to properly adjust the trimmer carburetor. On trimmers, in addition to electric motors, gasoline internal combustion engines are installed. If it just accumulated dirt, then washing with gasoline or blowing will help.

    With visible damage to the strainer, it is imperative to install a new one. There may also be damage on the fuel supply pipe (during repair, check this element).

    The carburetor starter in most cases does not work due to blockages. Use acetone or the same gasoline for flushing.

    Blowing off carburetor parts with a blockage of compressed air is an acceptable and comfortable repair practice.

    The throttle body, the bundles of carburetor parts, the intake or exhaust pipe. all of these parts are subject to depressurization. Probably you can check with a simple method. smear the problem area with soap suds.

    The device of the carburetor lawn mowers

    The diffuser is equipped with fuel channels. Fuel is drawn from them by an air stream.

    Outside the carburetor is installed:

    • fuel pump;
    • jet system;
    • system for adjusting the consistency of fuel with air;

    Principle of operation carburetor lawn mowers

    The throttle valve determines the amount of air to be supplied, and the motor power directly depends on this.

    Video: How to Set Up Stihl Lawnmower Turnover


    Adjustment carburetor lawn mowers

    Spare parts for lawn mowing Repair and adjustment carburetor lawn mowers.

    Adjustment carburetor lawn mowers on practice

    Carburetors lawn mowers can be purchased here: How adjust carb, if it is configured.

    Fuel is sucked into the carburetor system by a pump (its membrane). Then passes through the fitting in carburetor. Further, the fluid moves through the inlet and outlet valves of the pump. Filtered by mesh. The needle valve moves into the membrane chamber.

    Phased operation of the device:

    1. Air supply to the tube with an air baffle (damper). The partition controls the intensity of the air flow.
    2. The fuel supply system must be narrowed by a diffuser to increase the flow rate.
    3. Gasoline through the float chamber and nozzle tube with narrowing. A camera with a float adjusts the temporary volume of gasoline. In the float chamber, the pressure level is neutral, and in the tube with narrowing is already low. Due to the pressure drop, fuel enters through the nozzle.
    4. The acceleration of the air flow contributes to the transfer of fuel (gasoline) and its atomization. As a result, an air-fuel mixture of the necessary proportion or density is formed.
    5. The air-fuel mixture enters the engine cylinder through the fuel pipe.

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

    Simply put, adjusting the carburetor on the lawn mower is creating the optimal fuel mixture due to the correct air supply.

    how adjust lawn mowing carburetor

    Further customization DIY lawn mowers performed by adjusting screws. There are three of them:

    Right (L). adjustment of the fuel mixture for low revs.

    Need to find the maximum idle speed. To do this, slowly turn the screw (L) to the right and left.

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    To adjust, turn the screw a quarter of a turn necessarily counterclockwise.

    Bottom (T). is responsible for adjusting the engine at idle.

    • clockwise. increase;
    • counterclockwise. decrease.

    For proper adjustment of idling, it is typical:

    • steady work of the cold engine;
    • not overestimated speed of the hot engine;
    • a large headroom for the trimmer head;
    • stable operation of the engine when changing position (sharp rise or descent of the knife).

    Left (N). adjustment of the mixture at high speeds. (The screw is configured last).

    The left-hand screw (N) determines the general adjustment of the maximum speed, engine power, temperature and gas mileage.

    Setting the carburetor lawn mowers with the last screw is performed as follows:

    1. Open the throttle to full, while giving out full throttle. Turn the screw clockwise until the speed drops (in this case, they are oriented by ear).
    2. Turn the screw as slowly as possible counterclockwise until the engine runs unevenly.
    3. Then turn back quite a bit, barely hearing a stable, smooth operation.
    4. For a more visual application 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 setting (its correctness) is determined by the color of the candle, and not just by the speed and stability of the engine.

    Husqvarna Adjustment

    The Husqvarna trimmer carburetor adjustment is identical to the Husqvarna chainsaw carburetor adjustment.

    • the engine break-in period has ended (after using the first 4-5 liters of fuel);
    • the quality of the fuel components has changed (octane number of gasoline and brand of oil);
    • the air temperature and its vacuum (altitude, heat, coolness, frost) have changed significantly;
    • start of the Husqvarna trimmer operation season (in early May, after winter storage);
    • the adjusting screws turned themselves against vibration;
    • engine load has changed.

    And, to be sure that the Husqvarna engine works as expected and that the maximum trimmer performance (lawn mowers, lawn mowers) is ensured.

    Husqvarna carburetor adjustment

    Before adjusting the Husqvarna, perform trimmer maintenance (wash the lawn mower and engine, replace the spark plug, and remove minor defects).

    Be sure to wash the foam element of the air filter. Wash the element in warm water with soap, then squeeze and dry (or replace if it is old or damaged).

    Note: If you adjust the Husqvarna carburetor with a dirty air filter, after cleaning the air filter, the fuel mixture will become much poorer (which can lead to poor performance or even engine failure). Install a trimmer head with a cord of maximum permissible diameter and standard length (up to the cutting knife in additional protection) to create a load on the engine while adjusting the Husqvarna carburetor high-speed screw.

    Start the lawn mowing machine according to the Husqvarna Manual and warm it up for 10 minutes (if the trimmer head rotates at idle, the idle screw, i.e. the lower screw, must be turned counterclockwise until the trimmer rotation stops).

    Carefully turn both needles (right and left) to the middle position between fully twisted and fully twisted (do not turn the stopper!, This may cause the Husqvarna engine to malfunction).

    Trimmer carburetor. functions, do-it-yourself adjustment

    A modern gasoline trimmer is a complex unit, which also includes a carburetor. It is from its reliable and proper operation that performance will depend. The trimmer carburettor must be adjusted in the following cases:

    • after engine break-in (as a rule, it is necessary to use 4-5 liters of gasoline for this);
    • before the beginning of the mowing season;
    • if during operation from vibration, the adjusting screws are loosened loosely.

    Taking into account the fact that the trimmer does not belong to the category of complex units, carburetor adjustment can be done by yourself.

    Functions and working principle

    In order to understand how the carburetor of lawn mowers is arranged, it is worth getting acquainted with its working principles. The main elements of the carburetor include a throttle, the function of which is to perform control of the air supply. The operation of such a device as a carburetor can be considered in stages.

    • Air supply to the compartment where the throttle is located.
    • Moving air flow facilitates the movement and atomization of fuel through the nozzle.
    • The resulting mixture (air fuel) is fed into the engine cylinder.

    Acquainted with these basic steps, we can conclude: the more the throttle is open, the greater the consumption of gasoline in the mowing process.

    Carburetor adjustment for lawn mowers

    • The right screw. adjusting the air-fuel mixture. Turning the screw left and right is idling. It is necessary to determine the maximum speed.
    • Left screw. adjust the air-fuel mixture. Work is performed at high speeds. The screw is regulated last and foremost, engine power and gas mileage will depend on its proper setting.
    • Bottom screw. engine operation adjustment. The work is idling. Clockwise rotation indicates increase, counterclockwise indicates decrease.

    The last left screw is adjusted as follows:

    • the throttle fully opens and full gas is squeezed out;
    • the screw rotates clockwise until the speed decreases (orientation by ear);
    • turn the screw counterclockwise until the engine is not smooth. intermittent;
    • we turn the screw in the position in which it ensured stable and smooth operation of the engine.

    Carburetor for trimmer. device, do-it-yourself adjustment

    A carburetor is one of the most important units of lawn mowers, the function of which is to prepare a fuel mixture.

    In case of careless handling of the tool, the carburetor may fail, which makes further work with the lawn mowing impossible.

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

    How is a carburetor lawn mowers?

    The carburetor device is almost the same as in the well-known German and Swedish lawn mowers, as well as in Chinese-made tools. This assembly consists of the following parts:

    • Diaphragm fuel pump;
    • Atmospheric control system;
    • Idle system;
    • A swap primer that makes it easier to start the lawn mowing engine;
    • Elastic plate with two valves;
    • Needle valve;
    • Dosing system with a rotating rotor;
    • Throttle

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

    First, the air through the throttle valve enters the tube, and then passes to the diffuser. the narrowing point of the tube, where the air flow becomes especially intense. From the air diffuser it enters the float chamber, where it is mixed with the fuel mixture. After that, the fuel enriched in air is sucked in by the pipeline and enters the engine cylinder.

    Trimmer carburetor adjustment. how to adjust correctly?

    Before setting up a carburetor for lawn mowing, you will need to clean all the air and fuel filters available in the tool design. Further carburetor adjustment is performed using three screws:

    • Right marked “L”;
    • Bottom marked “T”;
    • Left h letter "H".

    The correct carburetor adjustment procedure is as follows:

    1. First you need to find a stable low revs motor lawn mowers. To do this, slowly turn the screw “L” clockwise and against it. Once you have determined the optimum low revs for the engine, turn screw “L” ¼ turn counterclockwise;
    2. Then you need to find the most stable engine idling. To do this, use the screw "T". Turning it clockwise, you increase the speed, and against it. lower them.
    3. The last step will be the adjustment of high revolutions of the lawn mowing engine. To do this, you need to press and hold the gas trigger, and at this time move the throttle lever to its highest position;
    4. After that, turn screw “H” clockwise until you hear that the motor is running as quietly as possible;
    5. Then turn the same screw in the opposite direction until you hear that the motor is running unevenly;
    6. Turn screw “H” again clockwise until you hear the motor running stably.

    After performing the above steps, you need to check the engine of the lawn mowers. In this case, special attention should be paid to his idling. If you have adjusted the carburetor correctly, you will notice that the cold engine is working stably, and the trimmer head has a large power reserve. In this case, the hot engine does not show overspeed and stably works when the trigger is pulled.

    DIY trimmer trimmer trimmer carburetor

    lawn mowers, like all gasoline tools for mowing grass, are not considered difficult to maintain equipment. They can and should be set up, repaired with their own hands. So, for example, in five minutes of your free time, you can adjust the trimmer carburetor.

    Often, to adjust the engine, you need to adjust the gas supply, and this is done precisely by the carburetor of the lawn mower. Such a device requires special attention. If used improperly, it may refuse to work or will perform its functions with errors and with high power consumption.

    Today we will analyze the main causes of failure and step-by-step adjustment of the part with our own hands.

    How is the carburetor of a lawn mower?

    What is a carburetor? This is a complex part in the system of operation of a mechanical device. In any model, air and gas are mixed for future supply to functioning cylinders.

    Important! The most high-quality and recommended lawn mowers can be safely called the devices of such brands: Husqvarna, Hyundai, Stihl, Zama, Walbro.

    The engine of the lawn mowers is based on an aluminum base, which has a diffuser (a recess with internal restrictions). It is through this recess that the air currents are heated. The oxygen delivery rate directly depends on the passage of the diffuser.

    Fuel paths are adjacent to the diffuser. Gasoline is drawn in through it through the air stream. But on the outside of the engine install such details:

    • Fuel pump.
    • Jet system.
    • The system for adjusting the ratio of gasoline to air.

    Important! The density of air in the carburetor depends on the volume of the flap open to access. The more the damper system is open, the more the unit consumes gasoline and the higher its power. That is, setting the carburetor on the trimmer is to create the optimal fuel intake due to the correct air supply.

    When do I need to adjust the carburetor in the trimmer?

    You need to configure the device in such cases:

    • The new engine used 5 liters of fuel mass in one go.
    • The weather has changed (a sharp drop in atmospheric pressure).
    • You bought another brand of oil or gasoline.
    • During prolonged storage.
    • After vibration, the screws unscrew themselves.
    • The consumption of gasoline increased, the carburetor began to pour fuel.
    • The appearance of carbon deposits on the electrodes of the internal candles of the device.
    • Gas stopped flowing into the cylinders.
    • The motor often stalls or does not gain enough speed.

    What are the failures and how to recognize them?

    One of the problems with the failure of the trimmer engine can be a strainer. Only two breakdowns can be attributed to this element:

    • The accumulation of dust and dirt.
    • Partial or complete failure.

    To identify the exact cause, you need to do a number of the following:

    1. Unscrew the cover of the fuel air lock to remove the strainer. If dirt is found on the part, rinse it with fuel or blow it thoroughly. If you see serious damage to the filter housing, without hesitation you need to install a new one.
    2. If the pipe for supplying compressor fuel is broken, then check this part. Most often, it requires periodic replacement due to its low strength.
    3. To clean the starting part of the carburetor from blockages, you need to use acetone or gasoline. You can also blow component parts with compressed air. this is the easiest and most convenient way to repair.

    Important! The throttle base, intake and exhaust valves, the joints of all carburetor parts can be checked with a simple action. grease the problem area with soap foam.

    Self-adjusting carburetor trimmer

    Before setting up your mower device, we recommend that you do the following:

    1. Clean and flush the engine.
    2. Check the spark plug for suitability.
    3. Remove dust and dirt from the air filter or replace it with a new one.
    4. Put a cord suitable for the diameter in the trimmer roller or install well-sharpened knives.

    After installing the cutting parts and starting the fuel engine, the carburetor needs to warm up for 10 minutes. If the cutting tool rotates while the engine is idling, reduce the engine speed.

    Adjusting the carburetor on the trimmer is a difficult and time-consuming job. To correctly configure it, you will have enough information from our informative article. And to do everything accurately, use the video, which clearly shows the whole process.

    Carburetor for trimmer. tuning, do-it-yourself adjustment

    Carburetor for trimmer. One of the most important units of the unit, which is responsible for the fuel mixture. If the equipment is improperly handled, the element may be damaged, which is why it is impossible to operate the lawn mowing without repair. To repair a garden tool, you need to know about its structure, the principle of operation and the rules of adjustment.

    • Design features and the principle of operation of the carburetor lawn mowers
    • Structurally, carburetors from well-known brands and Chinese manufacturers are practically no different.
    • The carburetor device for lawn mowing consists of the following elements:
    • Booster pump;
    • Atmospheric membrane tuning systems;
    • Primer, facilitating the start of the motor;
    • Cold running systems;
    • Elastic two-valve plate;
    • Metered system with a rotating rotor;
    • Throttle

    The model operates as follows:

    • From the air damper, air passes into the tube, which increases or decreases its flow;
    • In the area with an opening for the fuel mixture, the narrowed zone is the diffuser. In this zone, air moves faster;
    • The fuel mixture from the float compartment through the nozzle enters the tube. The amount of fuel is determined by the float;
    • With enhanced airflow, fuel is picked up and sprayed. An air-fuel mixture with sufficient density is created;
    • Sucks the mixture with a cylinder through the pipeline.

    The concentration of the air flow depends on how slightly the airlock is open, and accordingly, more fuel is supplied to the cylinder. Regulation of the carburetor of the lawn mowers is to set the correct ratio of the dampers to achieve the optimal consistency of the fuel mixture.

    When is carburetor adjustment required?

    The operator needs to adjust the work node in certain cases:

    • The new engine was run in using 4-5 liters of fuel;
    • Changed the composition of the fuel. the brand of motor oil and gasoline;
    • Weather conditions have changed (in winter, summer);
    • The level of rarefaction of air has changed;
    • The load on the power plant increased;
    • After prolonged storage of the unit;
    • The formation of persistent soot on the spark plug;
    • After starting, the motor stalls immediately or does not develop the required speed;
    • When vibrating, the tuning screws loosened;
    • The amount of fuel consumed has increased;
    • Gasoline is not pumped into the cylinder;
    • It turns out a lot of exhausts.

    How to do the adjustment of the carburetor lawn mowers with your own hands?

    Before setting up the carburetor assembly, a certain algorithm of actions is performed:

    • The motor is washed;
    • The spark plug is replaced or cleaned;
    • The air filter is replaced or cleaned. It can be dipped in warm soapy water, after the filter is completely dried;
    • A cord or knives are installed in the trimmer coil to increase the load on the power plant during tuning. The gas engine should run idle for at least ten minutes.

    If the cutting headset continues to rotate at idle, it is worth reducing the speed of the power plant. The operation of the T screw is adjusted, on some models it is marked LA. The idle speed control is twisted counterclockwise until the cutting element stops moving.

    The trimmer carburetor adjustment is dependent on three screws:

    1. L is responsible for the level of pumping the fuel mixture at reduced speeds. It is set up first. It is necessary to achieve maximum speed by unscrewing the screw to the desired point. After the regulator turns a quarter of a turn to the left;
    2. T (LA). sets idle operation. When you turn the screw to the left, the engine speed decreases, to the right. increase;
    3. H allows you to enrich the fuel at maximum speed. The screw adjusts high revs, fuel economy and power plant power level.

    The motor cannot run at full speed for more than 10 seconds, as it may break.

    Eliminates engine damage proper tuning:

    1. With the engine running, give full throttle;
    2. The screw N is unscrewed clockwise until the unit starts to slow down;
    3. Knob H rotates to the left until the motor is stable.

    If you follow all the instructions, the carburetor for lawn mowing is considered tuned: the engine runs at the required speed, slightly quadruples at high speeds, the cutting elements do not rotate without load.

    About adjusting the carburetor lawn mowers: how to set up and adjust with your own hands

    Adjusting the carburetor of the lawn mowers is a process that must be mastered for the trimmer to work properly.

    The trimmer is a completely simple device that can break down only in a few places and require mechanical repair or replacement of the part.

    Adjusting the carburetor device for a float-type lawn mower may require knowledge of certain subtleties. The nuances caused by the model and the specifics of its functioning will ensure a clear mode of mixing and supplying the fuel mixture.

    What is the problem of trimmer malfunction

    Champion lawnmower carburetor how to adjust? This is just a float type trimmer. a common option, designed to mix air and fuel in the prescribed proportions. The main problems that arise during the operation of the engine are approximately similar to the problems that overtake the carburetor in the car:

    • the motor may stall immediately after it has been started. The reason is that gasoline is not supplied enough. This is called “poor” fuel;
    • excessively supplied gasoline leads to incomplete combustion, excessive mixture density and uneconomical consumption.

    Important! It is necessary to regulate the carburetor under different circumstances: changes in temperature, octane number of fuel or type of oil, after winter or at the end of the break-in period, load or spontaneous cranking of screws from strong vibration of the case. Some owners prefer to configure the module before each use to make sure that it works correctly.

    Trimmer device

    Spare parts for motor cultivators

    The float carburetor consists of an aluminum body with a hole (diffuser).

    Air is injected through its passage opening, and gasoline is drawn in through the fuel channels along with the air stream. This is the basis of the device. the fuel chamber.

    Mounted on top of the nozzles, pump and adjustment system of the mixture provide not only its saturation, but also a uniform flow.

    For your information! A float carburetor has been used for decades, and the main problems are similar for all types. The principle of operation of the device depends on the quality of the mixture, and the adjustment is aimed at ensuring it.

    Principle of operation

    Stihl Electric Trimmer

    The air flow entering the tube with a throttle is amplified or weakened depending on its position. From the fuel chamber, gas enters a special pipe through the nozzle.

    Float. a device that regulates the supply of fuel, its level determines the volume. Gasoline supplied through the nozzle is mixed with air under the influence of a pressure difference. This produces an air-fuel mixture for engine operation.

    Note! Improper fuel composition is due to a lack of gasoline or air. This means that you need to adjust the throttle or the position of the float. The motor may also stall due to the jet, but this is already a more serious failure.

    Carburetor Adjustment

    How to adjust the trimmer on the lawn mower

    Most modules have adjustment screws, and the scheme usually helps to understand their functionality:

    • L. for fuel supply of a low-speed mode;
    • H. fuel supply at high speeds and its consumption;
    • T. idle debugging.

    Adjusting the lawn mowers, whose production is Chinese, can cause difficulties due to the presence of only one screw, which is responsible for idling.

    Important! The answer to the question of how to adjust the Champion lawnmower carburetor is better to look at the video where the professional does it.

    Carb Adjustment on a Patriot Trimmer

    The Patriot trimmer carburetor is adjusted by ear screws. Not a single verbal explanation will give a complete picture of how this is done, so it’s better to watch the video tutorial.

    After proper adjustment, the engine should increase speed, and when idling, the cutting tool will not turn. Everything is easy and simple!