Fuel adjustment on the trimmer Huter. How to adjust the carburetor on a chainsaw

Adjustment of a trimmer carburetor for Huter grass

The principle of operation of the carburetor

In various models of chainsaws, the structural device of the carburetor may differ, however, the principle of operation of this part is always the same: the injured air flow moves in the direction of the air (pulse) channel, the air is regulated by the air damper. Entering the pulse channel, air changes speed. The speed changes are affected by a special valve that covers the air intake hole. Fuel is supplying in the air channel, which is mixed with the air flow. As a result, a combustible fuel-air mixture is formed, which then enters the engine and burns there.

The principle of the carburetor of the chainsaw

Carburetor of the chainsaw Husqvarna 137

The principle of operation of the fuel system using the example of a gasopyle carburetor with a two.stroke engine

The components of any carburetor are:

  • aluminum corps (whole, cast);
  • nozzles or valves that regulate the amount of fuel entering the carburetor;
  • float chamber;
  • diffuser;
  • spray.

Figure 1 can be found with the location of the key nodes of the carburetor, and in Figure 2, see the appearance of the carburetor of the chainsaw. For proper adjustment of the carburetor, the owner of the chainsaw should be known by what principle this detail works:

  • When the engine starts, the air damper opens;
  • Due to the course of the piston inside the float chamber and in the air channel, sparse air forms;
  • Further, the mass of air is absorbed through the diffuser, where it is mixed with fuel, which also passes through the fitting into a float chamber, so there is a fuel-air mixture entering the inlet channels;
  • The last step is to get the mixture into the engine combustion chamber.

By adjusting the position of the damper, the owner of the chainsaw can either add air to the fuel, or impoverish it. this means that the fuel mixture will enter the combustion chamber faster or slower. Carburetor adjusting screws are used to set up engine speeds. Air filter is installed above the carburetor, which cleanses the air before entering the air channel.

Table of proportions of fuel oil mixture for Husqvarna chainsaws

fuel, adjustment, trimmer, huter

The carburetor hub of expensive and medium.sized gas station is almost the same. Cheap Chinese chainsaws are often different from expensive original models of chainsaws in that they do not have a number of details in the carburetor node. The features of adjusting the carburetor of Chinese chainsaws can be read further in the article.

Step.by.step sequence of process adjustment process

Before starting adjustment, remember:

  • The adjustment is carried out only “on hot”, that is, the engine needs to be started and warmed up for 10 minutes;
  • Then the adjusting screw is turned counterclockwise and stop the chain of the chainsaw;
  • Before adjusting, the chainsaw must be put on a flat surface, and the saw part should be directed away from the owner;
  • For adjustment, use three screws with literal designations, H. sets up the upper speeds, controls the main nozzle, L. regulates the operation of the idle jacket, sets low speeds, t. tunes in idle.

Carburetor adjustment step by step:

  • Scroll the screw l from left to right, or from right to left, find the maximum number of engine speeds, then return 1/4 of the turn back;
  • Do the same actions with a screw N;
  • The chainsaw should work for a few seconds, using the tachometer determine the maximum engine speed. their indicator should not exceed the maximum indicated in the instructions to the chainsaw;
  • If the circuit moves in the idle mode, turn the screw T in the direction of the circuit until the circuit is completely stopped (the idle passage is always regulated only by the tj, which is rotated from right to left. counterclockwise. until the chain stops completely).

Why adjustment can be ineffective?

  • Weakened threaded fasteners, air penetrates through the formed gap;
  • The nozzles are clogged with tarry deposits, flushing in acetone is required;
  • The ignition is not adjusted.

Carburetor for a trimmer for grass

A carburetor for a trimmer for grass is one of the most important components of the unit that is responsible for the fuel mixture. With incorrect handling of the technique, the element can be damaged, which is why it is impossible to operate a motorcycle. To repair a garden tool, you need to know about its device, the principle of functioning and the rules of adjustment.

How to Adjust (Tune) the Carburetor on that Vintage Chainsaw 101 (40 credits)���� Hope it helps!

Design features and the principle of operation of the carburetor of the lawn mower

Structural carburetors from well.known brands and Chinese manufacturers are practically no different.

The device of the carburetor Motokosa consists of such elements:

  • Pumping pump;
  • Systems of settings with an atmospheric membrane;
  • Primer that facilitates the start of the motor;
  • Cold system systems;
  • Elastic two.valve plate;
  • Dosed system with a rotating rotor;
  • Throttle.

The model operates as follows:

  • From the air damper, the air passes into the tube, which increases or decreases its flow;
  • On the site with a hole for the fuel mixture, a narrowed zone. diffuser. In this zone, the air moves faster;
  • The fuel mixture from the float compartment through the jacket gets into the tube. The amount of fuel is determined by the float;
  • Enhanced air stream, the fuel is picked up and sprayed. A fuel mixture with sufficient density is created;
  • Sucks the mixture by the cylinder through the pipeline.

The concentration of the air flow depends on the ajar of the airflow, respectively, more fuel is supplied to the cylinder. Motokosa carburetor regulation is to establish the correct ratio of the damper to achieve optimal consistency of the fuel mixture.

Carburetor device

The lawn mower (lawn mower) contains the basis. the case of aluminum, which houses the rest of the parts, coordinated as a whole. The carburetor housing has a diffuser. a move with internal channels through which air is pumped.

The larger the cross section of the diffuser, the more actively, oxygen is supplied along with the air-an oxidizing agent in which fuel burns (gasoline mixture).

Channels branching from the course of the diffuser deliver fuel, with which the heated air is mixed, which carries away the vapors of gasoline. Outside the main compartment of the carburetor are placed:

The latter and forms the same rattling mixture ignited in the combustion chamber of the carburetor.

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 gasoline’s injection. 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.

We do the adjustment of the Husqvarna carburetor if:

, To be sure that the Husqvarna engine works as expected and that the maximum efficiency of the trimmer for grass (lawn mowers, motorcycles) is ensured.

Before adjusting Husqvarna, make maintenance of a trimmer for grass (wash the lawn mower and engine, replace the spark plug, eliminate 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 it if it is old or damaged).

If you adjust the Husqvarna carburetor with a dirty air filter, then after cleaning the air filter, the fuel mixture will become much poorer (which can lead to poor operation or even engine breakdown).

Install a trimmer head with a cord of the maximum permissible diameter and standard length (to a cutting knife in additional protection) to create a load on the engine while adjusting the high speed of the Husqvarna carburetor.

Get the lawn mower according to the leadership of Husqvarna and warm for 10 minutes (if at the same time the trimmer head rotates at idle speed, then the idle screw, t.e. Lower, it is necessary to turn counterclockwise until the rotation of the trimmer head stops).

Carefully turn both needles (right and left) in the middle position between fully twisted and completely screwed (do not cure the stopper!, This can lead to breakdown of the Husqvarna engine). Husqvarna carburetor adjusting screws for adjusting the carburetor: right, left and lower

Husqvarna carburetor adjusting screws for adjusting the carburetor: right, left and lower.

The adjustment of the idle speed is considered to be correct when:

  • The cold engine is stable at idle.
  • The hot engine has not highly high speed speeds.
  • Before the rotation of the trimmer head, a sufficient supply of revolutions remains.
  • The engine works steadily in any position (for example, with a sharp lowering knife).

From the manufacturer (Husqvarna), the idle screw from the fully twisted, was twisted at 8 full revolutions and “2 hours” (now it remains). Husqvarna.2.recommended idle gas mowing engine. 2.900 rpm.

The Husqvarna engine should not operate at full speed for more than 10 seconds!

  • Open completely the throttle (give full gas) and slowly turn the left screw clockwise until the speed of the Husqvarna engine is reduced (by ear).
  • Then turn the left screw very slowly counterclockwise until the engine starts to work uneven.
  • After that, turn the screw slowly back to a slight distance clockwise until the Husqvarna engine starts to work smoothly.

This is where the HUSQVARNA adjustment is completed.

On the new trimmer Husqvarna from the manufacturer (Husqvarna), the left screw was completely unscrewed (by 0.5 turnover) and blocked (pouring) with solid plastic, which I drilled after the guarantee period. Now the left screw (like the right one) looks at 11 hours approximately.

We check the correct settings of the Husqvarna carburetor

The engine is quickly, evenly and confidently gaining momentum, and a little four at maximum speed, the T-35 trimmer head should not rotate at idle.

The device of the carburetor of the lawn mower

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.

Cooper adjustment

We start adjusting small revolutions. The screw limits the return movement of the throttle lever. wrapping it, we increase idle speed, unscrewing it. reduce. Adjust so that the engine works confidently at low speeds and even a little accelerated (for better starting), but so that the coil with a fishing line or a knife does not rotate, and before the start of their rotation there is a sufficient supply of revolutions. If the engine is poorly starting, still increase the speed at idle.

Fuel supply adjustment

Start slowly wrap the screw for supplying the fuel mixture until the moment the engine starts to stall or until it stalls if you do not have time to catch the moment. After that, unscrew the screw for a quarter of turning if the engine has not stalled, or half a turn, if stalled. Get a stalled engine. Check, opening the throttle, as the engine is gaining momentum. Continue to turn off the screw for a quarter of turning until the engine during the frying begins to confidently gain increased speeds. This will be the moment of the most economical stable engine operation. In the gasoline trimmer for PRoraB-8406 grass, adjusting screws are wrapped clockwise, unscrewed-against, in some other brands there may be the other way around.

Removal and installation algorithm

In cases where it is necessary to clean the Stihl 180 carburetor or its disassembly, first you need to remove the node from the chainsaw. This must be done in compliance with a certain method of action:

  • Put on a protective cover for a chain on the tire.
  • Remove the top cover of the chainsaw.
  • Unscrew two nuts for fastening the air filter and carburetor.
  • Remove the air filter housing.
  • Disconnect the wire from the engine control lever.
  • Gently pull the lever from the landing site in the case, immediately disconnecting the air damper thrust from it.
  • Pull the carburetor on yourself and disconnect the fuel supply, also the thrust of the throttle.

To facilitate dismantling, you can additionally promote the back handle and disconnect the thrust of the throttle of the throttle at first from it, and later only from the carburetor. It may be required, t. to. Without certain experience, disconnecting the craving from the carburetor is quite problematic and easier at first to disassemble the handle.

Set the part to the place, you should carry out the revision order of the method.

Chainsaw Carburetor Tuning | How to tune carburetor #carburetor #chainsawcarburetortuning

When removing and installing the control lever of the chainsaw engine, you should be as attentive as possible, t. to. The place of landing on the saw building is a weak link in the saw, and very often inexperienced users break it.

When you need a setup at all?

In particular, in rare cases, it is necessary to adjust the carburetor of the chainsaw, more often problems arise related to fuel consumption or wear of parts. But sometimes “symptoms” indicate the need to regulate the mechanism. Here are some signs:

  • When the engine starts, it stops immediately. Alternatively, it will not begin at all. The reason is an excess of air and a lack of fuel.
  • Fuel consumption increases, and as a result. A large amount of exhaust gases. This is due to the reverse process. Oversaturation of the mixture with fuel.

Read adjustment of the Carburetor of the Stihl MS 361 chainsaw

The reasons for the refusal can be mechanical:

  • Due to severe vibration, the protective cap is damaged, as a result of which all three bolts lose their established fixation.
  • Due to wear of the engine piston. In this case, the adjustment of the carburetor of the chainsaw will help only for a while, it is better to replace the worn part.
  • Due to clogging caused by poor-quality fuel, scale or damage to the filter. The carburetor requires complete disassembly, washing and adjustment.

If the chainsaw suddenly stops working, it must be disassembled to find out the reasons.

Tools

The following tool will need to be adjusted: tachometer, screwdrivers, in rare cases special keys. We will analyze their purpose, the need for availability and cost.

The PARTner lineup is represented by subsequent modifications, any of them will be considered separately:

Partner P350S: 2 l engine.With.\ 140 watts set in motion a chain with a step of 3.8 inches, moving at a speed of 22 meters per second, stretched on a tire 400 mm long. these characteristics significantly increase performance, profitably highlighting this model in the middle of analog. The fuel tank capacity is 250 ml. The Partner P350S model uses new user safety approaches: an inertial locking of the circuit, blocking using a special switch, a chain capture, which allows it to inhibition with various methods. The design also introduced the fuel pump, which also removes the remaining air and fuel from the carburetor, which provides a more common start.

Partner 350 HT Chrome: a chainsaw is armed with a engine with a power of 1.3 liters.With.\ 1300 W, which is perfect for the implementation of the work of average difficulty. The highest characteristics of performance provides a chain with a 3.8 inches teeth pitch, 400 mm long length. The volume of the fuel tank is 400 ml. this guarantees the highest duration of work. As parts that optimize the chainsaw is the vibration system, which is achieved by the method of using long.term steel springs. Safety is ensured using a double brake system.

Partner 350 Chrome: has a 1.9 liter engine.With.\ 1300 watts. Tire length. 400 mm, chain step. 0.325 inches. This significantly increases the productive characteristics of the chainsaw. The volume of the fuel tank is 400 ml. The model is characterized by the highest wear resistance, which is caused by a brilliant coating. Safety provides an inertial type circuit stop.

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.

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.

Adjustment of the carburetor of a Chinese lawn mower. Practice.

The correct setting of the carburetor is determined by the engine operation and the color of the candle. Adjusted.

Insidious malfunction of the carburetor of the Chinese lawn mower.

Spare parts for motorcycle repair and adjustment of the carburetor motorcosa.

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.

6 Комментарии и мнения владельцев on recording adjustment 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

A lawn mower or a trimmer for ICE grass requires not only a constant refueling of the fuel mixture of gasoline with oil, but also periodic adjustment of this fuel supply. The carburetor is responsible for the supply of fuel to the lawn mower cylinder, the effectiveness and performance of the tool depends on the good operation of which. If in the process of operation a faulty (abnormal) engine operation is detected, then the first step is to adjust the carburetor of the lawn mower. Before setting up a carburetor of a gasoline trimmer for grass, we will first figure it out with its design.

Setting up a carburetor of a lawn mower with three adjusting screws

Before starting work, you need to place the lawn mower on a flat stable surface. Remove the chain in the opposite direction. There are motorcycles with two and three adjusting screws. Two screws most often equip the tools produced in China. Consider the adjustment of the carburetor Motokos with three screws.

Setting up a carburetor of a lawn mower with three adjusting screws

Before proceeding with the adjustment of the carburetor of the lawn mower, you need to rinse the air filter. Cleaning is carried out with water with a detergent or soap, and if necessary, a new. Often in the poor work of the carburetor, scibberries are guilty. In order to prevent the filter, it is recommended to clean the filter after every 10 hours of operation of the tool. Do not forget to check the condition of the candle, if there is a dozen, you need to clean it. Candles are consumables and have their own resource. To ensure good operation of the engine of the lawn mower, candles periodically need to be changed. Next, we evaluate how well the carburetor is fixed to the cylinder-piston group. After the preparatory manipulations are completed, you need to start the motor. Let the engine work for 5-10 minutes. Then you need to identify how many adjusting screws on your tool.

There are the following adjusting screws on the gasoline trimmer:

Fuel supply adjustment

At first you need to slowly tighten the screw adjustment screw for the fuel mixture. You need to do this until the engine starts to stall or stalls. Following this, if the engine did not stop working, you need to turn the screw for a quarter of turnover, and if it stalled, then by half the turnover. Next, you should have a stalled engine. Then you need to open the throttle and see how the speed is gaining. Turn the screw for a quarter of turnover again. You need to scroll until the engine begins to confidently gain increased speeds during cuffing. This is the right time when the engine works most economically. There are times when adjusting this screw does not give anything. Often the reason is in the factory spring that is located on this screw. This does not happen to all the tools. And if the spring turned out to be defective, then replacing it will not be difficult. A suitable spring can be purchased at any construction store.

Cooper adjustment

Following the adjustment of the fuel supply, we are accepting for the adjustment of the idle. To do this, you need to adjust the corresponding screw so that the engine works slightly accelerated at small speeds. But it is necessary to trace, for the immobility of the reel with fishing line and knives. Before the start of their movement, several revolutions should remain in stock. The movement of the coil and knives can subsequently lead to the rapid wear of the clutch. Having noticed that the engine starts poorly, you need to increase the number of revolutions at idle. With an increase in revolutions, the fuel mixture is saturated with air, which leads to power loss.

The main signs of the proper idle work:

  • Revolutions for a trimmer head;
  • Uninterrupted operation of the engine even when the position changes (sharp rise or descent of the knife);
  • Calm operation of the engine at a cold move;
  • Lack of increased speed of hot engine.

Maximum speed adjustment

Further, for the full tuning of the carburetor of the lawn mower, it is necessary to adjust the maximum speed. It will not be superfluous to look into the instrument operating manual and see the maximum speed value. This amount will help to determine the tachometer most accurately. If such a device was not at hand, we set up by ear. Barely determining the maximum speed of revolutions by ear, we begin adjustment. A screw for limiting maximum revolutions will help in this matter. Control the engine operation at maximum speed. If necessary, reduce speed, weaken the fixing nut and unscrew the screw. If the turnover is too large, then you will need to screw the screw. These actions must be done in order to protect the engine from overheating. Scroll the screw until the clear even operation of the engine is established.

After the work done, if everything is done correctly, the stable work of the tool is provided.

Understand this by the following signs:

Husqvarna carburetor adjustment

Before adjusting Husqvarna, make maintenance of a trimmer for grass (wash the lawn mower and engine, replace the spark plug, eliminate minor defects).

fuel, adjustment, trimmer, huter

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 it if it is old or damaged).

Note: If you adjust the Husqvarna carburetor with a dirty air filter, then after cleaning the air filter, the fuel mixture will become much poorer (which can lead to poor operation or even engine breakdown). Install a trimmer head with a cord of the maximum permissible diameter and standard length (to a cutting knife in additional protection) to create a load on the engine while adjusting the high speed of the Husqvarna carburetor. Get the lawn mower according to the leadership of Husqvarna and warm for 10 minutes (if at the same time the trimmer head rotates at idle speed, then the idle screw, t.e

Lower, it is necessary to turn counterclockwise until the rotation of the trimmer head stops)

Carefully turn both needles (right and left) in the middle position between fully twisted and completely screwed (do not cure the stopper!, This can lead to breakdown of the Husqvarna engine). Husqvarna carburetor adjusting screws for adjusting the carburetor: right, left and lower

Husqvarna carburetor adjusting screws for adjusting the carburetor: right, left and lower.

1) The right screw l. regulates the enrichment of a mixture of low revolutions (regulated first): Find the maximum idle speed, slowly turning the right screw to the right and left. Then turn this screw on ¼ turn counterclockwise. Note: from the Husqvarna plant, the right screw was completely unscrewed (at 0.5 turnover). Now he is looking at “11 hours”.2.

The adjustment of the idle speed is considered to be correct when:

  • The cold engine is stable at idle.
  • The hot engine has not highly high speed speeds.
  • Before the rotation of the trimmer head, a sufficient supply of revolutions remains.
  • The engine works steadily in any position (for example, with a sharp lowering knife).

Note: from the manufacturer (Husqvarna), the idle screw from the fully twisted, was twisted at 8 full revolutions and “2 hours” (now it remains). Husqvarna.2.recommended idle gas mowing engine. 2.900 rpm.3) Left screw h. regulates the enrichment of a mixture of high revolutions (is regulated last). It regulates maximum speed, engine power, temperature and fuel consumption.

Note: the Husqvarna engine should not operate at full speed for more than 10 seconds!

  • Open completely the throttle (give full gas) and slowly turn the left screw clockwise until the speed of the Husqvarna engine is reduced (by ear).
  • Then turn the left screw very slowly counterclockwise until the engine starts to work uneven.
  • After that, turn the screw slowly back to a slight distance clockwise until the Husqvarna engine starts to work smoothly.

This is where the HUSQVARNA adjustment is completed.

Note: recommended by the highest possible speed of the Husqvarna engine. 11.500 rpm. The maximum output capacity of the Husqvarna 333R lawners engine is 1.6 kW (2.1 l.With.) at 8.400 rpm.

Note: on the new trimmer Husqvarna from the manufacturer (Husqvarna), the left screw was completely unscrewed (by 0.5 turnover) and blocked (bay) with solid plastic, which I drilled after the guarantee period. Now the left screw (like the right one) looks at 11 hours approximately.

We check the correct settings of the Husqvarna carburetor

The engine is quickly, evenly and confidently gaining momentum, and a little four at maximum speed, the T-35 trimmer head should not rotate at idle.

Chips on the choice

In accordance with the current statistics, it is the gasoline models of mowers that are most in demand. This is largely due to their mobility and functionality. However, when choosing a specific model of technology, it is necessary to take into account a number of other parameters. In such situations, it will be useful to compare motorcycles with other types of trimmers.

Electric devices are connected to a household network with a voltage of 220 V. Such machines do not pollute the air due to the lack of exhaust gases. No less important points will be the minimum noise level and relatively small weight. At the same time, the processed area is significantly limited.

The battery models today are the least common trimmers for grass for grass. The electric engine of such mowers does not feed from the network, but from the battery, which provides maximum mobility. However, the operating time of the equipment is limited by the battery charge and is an average of 35-45 minutes. Another important point is the relatively high cost of battery models.

When choosing a specific model of a gasoline trimmer for grass, it is necessary to take into account its technical characteristics. So, low.power devices are equipped with coils with a fishing line. On more reserved and powerful models, knives and cutters can be used as cutting elements

On more reserved and powerful models, knives and cutters can be used as cutting elements.

Common malfunctions of carburetors

Damage of the carburetor of the trimmer for grass occurs due to the use of poor quality gasoline, damaged air filter and the accumulation of dirt in the chamber of this block. Most often, it is quite possible to repair a carburetor with your own hands. Below listed typical malfunctions of the carburetor motorcosa.

Problems of the fuel pump

A common malfunction that “pursues” the fuel pump is a deformation of the pump membrane. For this reason, it does not fit properly, and the pumping canals are not compacted.

The reasons for the deformation of the membrane can be as follows:

As a result, damage to the membrane reduces the productivity of the pump, and, as a result:

  • the flammable mixture is impoverished;
  • The engine is difficult to launch;
  • interruptions in the work of the motor appear;
  • The piston is damaged.

Also, the above consequences for the engine can cause clogging of the pump cavity from the pulse side. In this case, dirt enters the membrane through the pulse channel.

To eliminate clogging, you will have to disassemble the carburetor and clean the membrane.

Clogging of the mesh filter

A mesh filter can be contaminated when contaminated fuel is received through a fuel hose or a suction head that has defects. In the photo below you can see how a clean filter and contaminated (parts are separated by a feature).

To eliminate the malfunction, thorough cleaning and flushing of the mesh filter will be required. It is also recommended to blow with compressed air all holes in the body of the carburetor trimmer for grass.

The adjusting lever is faulty

This breakdown appears when the contact surface of the lever wears out.

Washing the contact surface occurs due to the presence of abrasive particles in gasoline or due to strong vibration of the motor during operation. This defect in the adjusting lever causes problems with the inlet, as well as incorrect operation of the motor at idle.

Wear of the intake needle

The inlet needle fails, as a rule, due to the presence of abrasive particles in the fuel fluid.

  • The insurance of the saddle of the intake needle is violated;
  • the leakage of the combustible mixture appears;
  • malfunctions in the operation of the engine associated with re.enrichment of the fuel mixture appear.

Also, the intake needle can simply jam.

Singing an intake needle can cause the presence of dirt in a combustible, or a long simple apparatus without work.

Clogging of the adjusting cavity

If dirt accumulates in the adjusting cavity, then the inlet needle cannot lock the hole tightly and a lot of fuel pours into the chamber.

This causes fuel rewriting, and the engine begins to work incorrectly. It is necessary to disassemble the carburetor and clean the cavity of the adjusting membrane.

Deformation of the adjusting membrane

The membrane may be deformed with prolonged operation of the unit and when using aggressive fuel.

The impossibility of normal adjustment due to the defect leads to:

The problem with the intake adjustment lever

This problem may occur if the adjusting lever is incorrectly, or bend it before installation. As a result, the contact surface takes the wrong position, which violates the additional fuel supply.

Damage to the damper

Throttle and air shutters basically wear out due to the presence of abrasive particles in the air. Defective shutters look as if they were subjected to sandblasting.

As a result of wear of the damper, the engine performance decreases, malfunctions appear in its operation, piston rings, piston and cylinder coating wear out.

Wear of the throttle and air damn

The shaft of air and throttle can wear out for the following reasons:

  • insufficient and incorrect air filter maintenance;
  • The air filter is damaged;
  • The air filter is unsuitable for this device.

Due to the ingress of poorly purified air, the shaft wears out and may break. The broken parts of the shaft can fall into the combustion chamber or the engine of the engine and cause serious damage to the entire piston system.

To eliminate problems with air purification, it is necessary to replace a defective filter or rinse the existing (working). The filter must be washed in soapy water and dried.

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