The lawn mower fires in the silencer causes. High -voltage wires are wrong…

Chainsaw shoots at the carburetor reason

To date, it is probably difficult to find a master who would not have such a universal, practical, and multifunctional tool as a chainsaw.

This device is deeply rooted in everyday life, and this is not surprising, because the chainsaw has become a simply indispensable assistant in the field of wood cutting, harvesting firewood for winter time, wood saws, and it is also used in the construction sphere, etc.

Naturally, her positive aspects can be talked endlessly and she copes with her task simply great. But, like any technique, no matter how unique and highly practical over time fails and this is normal. Ural chainsaws why shoots in a carburetor? The cause of the malfunction, consequences. Why does a chainsaw shooter in a silencer. The most important thing at this moment is to correctly determine the cause of the malfunction and quickly eliminate it.

Naturally, you can contact various kinds of services that will put your equipment in order for a fee. But at the same time you will have to pay a significant cost. What for? After all, you can try to determine the degree and reason for the breakdown and repair.

Since there are such insignificant breakdowns that can be eliminated within five minutes. It is about them and ways to eliminate them that we will talk in this article.

Why shoots in a silencer

The main reason that the engine shoots into the silencer is unburned fuel, which fell into the exhaust gases system and ignited in it. The larger the amount of gasoline flowed out, the louder the cotton will be, and in some cases there may be even a whole series of “shots”. In turn, fuel can get into the exhaust system for various reasons. These can be malfunctions of the carburetor, timing, ignition systems, various sensors (on injector machines) and so on.

The situation when shoots in the exhaust pipe can occur under different circumstances. For example, during extension, at idle speed or gas discharge. As a rule, when cotton from the exhaust pipe, a large amount of smoke is released. This malfunction is also accompanied by additional symptoms. the loss of engine power, floating idle speeds, increased fuel consumption. We will analyze in order of the reasons why it shoots into the muffler, as well as methods for eliminating a malfunction.

Can such a cotton damage the engine?

In almost all cases, there is no specific danger in connection with the unpleasant consequences of the explosions of the engine into the silencer. But if in the exhaust system of your car there are weaknesses in the form of bad joints, the leaky walls of the muffler or bad gaskets, the cotton can bring these weaknesses to the need for repair, because all this energy as a result of the explosion forms tremendous pressure, which seeks to exit through the weakest Places.

  • Poorly adjusted ignition ahead. If your car has a manually adjustable ignition attack angle, then there may be enough incorrect adjustment by only a few degrees to cause unpleasant consequences in the form of claps in the silencer. In this case, you need to go to a car service and adjust the ignition. Most of the new cars, however, do not have such an urgent angle, but the cause of such claps can be a faulty ignition module or an on.board computer that causes the same problem of synchronization of the piston ‘movement in the engine and the time of supplying sparks.
  • Confused candle wires. If you mixed up the wires of your spark plugs after they removed them and inserted them back in the wrong order, you can hear just the same unpleasant consequences that we are talking about in this article. If you just disconnected these wires, and your first attempt to start the car led to cotton in the muffler, then, first of all, check the order of inserted cords.
  • Improper gas distribution phase adjustment. Valves that are very poorly configured can leave enough cracks to cause unpleasant consequences. In this regard, broken or strongly worn valves or the distribution shaft itself can lead to the same cotton. But this is the worst scenario, so you do not need to immediately blame the gas distribution system and try to diagnose. However, if your car is equipped with electronic gas distribution phases, also check the electronics.
  • The late ignition.If the angle is delayed, the spark that is responsible for ignition of the fuel mixture will be supplied too late when the inlet valve is already opening. Accordingly, part of the finished mixture will go directly to the collector. Important: also the danger of an incorrectly exhibited ignition force that the valve can occur, as well as the burning of the exhaust pipe. That is why it is recommended not to delay the “treatment” of the engine if the pops in the muffler begin to be heard. There is another problem in ignition, which can lead to cotton in the muffler even with properly exposed ignition. this is a weak spark. Most often, a weak spark is associated with a malfunction of the candles, so the first thing you should check them and make sure of their serviceability. Also, a weak spark can occur due to problems in contact wires or toggle switch.
  • Slipping belt of timing. The timing belt is equipped with teeth, which are needed so that the gear clings to them. If at least one tooth is cut off on the belt, your engine will not work properly and may have unpleasant consequences in the form of the same cotton. Checking the phase of gas distribution will indicate to you if the timing belt is in a faulty state.
  • Problems in thermal gap.The first thing to do when the claps appears in the muffler is to diagnose, at what loads they can be heard. If the engine shoots into the silencer, both at high and low speeds, most likely the reason is the wrong size of the heat clearance of the valve on the cylinder block. As you know, pushers in all situations are required to have a small gap at the junction with the valve. This is necessary because with an increase in temperature, metal parts expand, and the gap is reduced. If the gap is installed correctly, then when the metal is expanded, the valves will fit tightly to the nest. When a too large gap is exhibited, the valve is not able to completely close the lumen, as a result of which at the time of compression, part of the fuel mixture through the gaps will go to the exhaust manifold, where it will explode, which will cause characteristic claps.

Is it possible to use the car if the engine shoots into the muffler

Since it is impossible to determine the cause without diagnostics right away from which the engine shoots into the silencer, you need to contact the service center as quickly as possible. You can drive such a car, but the resource of the exhaust system and engine as a result of such trips risks seriously reduced.

If you notice a mistake, inaccuracy or want to supplement the material, write about it in the Комментарии и мнения владельцев, and we will fix the article!

Diagnosis of the ignition system and settings of the UZ

The check should start with high.voltage wires of the ignition system. Violation of the procedure for their connection will lead to the fact that the moment of sparking on the spark plug will not occur at the end of the compression tact, the very procedure for supplying sparks along the cylinders during engine operation will also be violated. In this case, the motor may start, but during operation, departments will be present in the carburetor, which will be repeated with a certain frequency. To solve the problem, the wires should be connected to the spark plugs, taking into account the fact that there are special grades on the tumbler cover. The specified marks will help to switch in the correct order.

In the event that the engine shoots at the carburetor, the reason may be in early ignition. This means that the spark appears too early. In other words, the mixture is ignited not at the end of the compression tact, but at the moment, as the piston begins to approach the VMT, completing the clock.

We also recommend reading an article on how to determine earlier or later ignition. From this article you will learn about the main signs and symptoms of an impaired ignition force for the urgent angle.

In this case, the mixture of fuel and air in the cylinder burns out of timely, as a result of which the combustion process is violated. The result of early combustion is a “background” in the form of cotton into a carburetor. With late ignition, pops can go into the muffler, since the combustion still continues at the time of the beginning of the re.opening of the intake valve on the next tact. over, the burning of the remnants of the mixture applies to a new portion of the fuel charge, which is sucked into the engine from the carburetor to the intake manifold during the inlet. In such conditions of the impaired combustion process, the engine overheats. Often later or early ignition can be determined by the state of candles. If the candles are white, with a carbon and t.D., Then the UOZ needs to be checked and set by adjusting the ignition force angle. This setting is made by turning the trambler in accordance with the scale.

Another reason that shoots in a carburetor may be a faulty trimbler (ignition distributor breakdown). This device may have a number of malfunctions in the form of a breakdown of the cover of the trambler, which failed a runner or high.voltage wires at the place of attachment.

You should also check the hall sensor and pay attention to the ignition distributor bearing. Problems with a bearing or other nuances may indicate the need to replace a trambler. We add that during the diagnosis it is optimal to install the initially serviceable device on the car, which will allow faster and more accurately localizing the ignition distributor malfunctions. Similar actions should be performed with the switch of the ignition system. In the event of its breakdown, sparking is disturbed, the spark itself is not supplied at a precisely given moment.

The impoverishment of the mixture: carburetor and fuel system

The operation of the carburetor engine on the “poor” fuel-air mixture often leads to the formation of cotton and fireplace in the carburetor. A similar phenomenon arises due to the fact that the impoverished mixture burns too slowly. The problem resembles a failure in the ignition, that is, the poor mixture burns after the new voting clock has begun. It turns out that after the release on the inlet stroke, the intake valve is opened, and the impoverished fuel mixture is still burning out in the combustion chamber. The incoming portion of the mixture also lights up. As a result, a cotton is created in the inlet, which reaches the mixing chamber of the carburetor itself. It should also be remembered that the depleted working mixture is one of the main reasons for the engine overheating.

There are several reasons for the formation of a too “poor” mixture: carburetor, fuel highways and fuel filters, gasoline pump. The most common problems of the carburetor can be considered pollution of fuel and air jetting, which are constituent elements of such dosing devices.

silencer, causes, high, voltage, wires

It is also necessary to check at what level the fuel in the float chamber is located. Another reason for the impoverishment of the mixture may be an air leak. In parallel, the accelerating pump of the carburetor should be checked, especially in the case of fireplace with a sharp press on the accelerator. Note that in most cases, to normalize the operation of the internal combustion engine, it is enough to clean the carburetor with a “carbicliner” cleaner and then correctly configure the device, and also replace the fuel filters.

Check the carburetor and air filter

To figure out why shots appear in the muffler, it does not always succeed. The first assumption put forward by car owners is a violation of the timing of the timing. But the reasons can be in another.

Before starting work and checking the engine, it is worth understanding the principles of such a phenomenon.

Explosion in the exhaust pipe. a certificate of combustion of the fuel mixture outside the combustion chamber.

The first thing to start with is to check the condition and correct settings of the carburetor, as well as an air filter.

Practice shows that too rich the fuel mixture does not burn completely, and its remnants are in the collector of the release, and then in the muffler.

The existing temperature in the tract is enough for the finished mixture to catch up with the appearance of a characteristic cotton.

  • Dismantle the air filter and replace the internal element that provides filtering.
  • Check the adjustment of the fuel supply in the carburetor.

The effect of thermal gap on the clap in the engine

When the motor and first explosions in the muffler appear in the muffler, car owners are testing cars at various loads.

So, the appearance of cotton at any speed (high, medium and low) may indicate failures in adjusting the heat clearance of the GBC valves.

Solution. disassembling the motor and using the tool for configuration. After performing the audit, you can draw conclusions about the causes of the problem.

Briggs & Stratton Engine Problems. Fire out Exhaust.

Cams and pushers of camshaft at the place of touch to the valve rod should have a small gap.

After heating, the metal parts increase in size, and the gap decreases.

If the adjustment is made correctly, the valve is completely closed the clearance, and if this parameter is violated, the gap remains through which the mixture exits into the release collector.

The result is the ignition of the fuel non.combatant in the engine. For the “treatment” of cotton, it is necessary to adjust the gap of the GBC valves. It is also important to pay attention to the color of smoke from the exhaust pipe.

Causes of cotton in the muffler

The main reason that shoots in the silencer is to get a part of the fuel from the engine cylinders into the exhaust system. Further, the fuel begins to evaporate, after which in conditions of high temperature and closed space there is an explosion.

Feasts in the silencer can occur both on a gasoline and occasionally on a diesel engine, as well as on engines with HBO. The carburetor engine shoots into the muffler, similar pops appear on engines with an injector. In other words, the problem is common for various types of internal combustion engine and quite common.

A rich fuel-air mixture

To begin with, most often problems with the mixture of formation and obvious re-enrichment of the fuel-air mixture lead to bastards in the exhaust system. A little theory on the example of gasoline ICE. As you know, for stable operation in any modes, the engine requires a working mixture of fuel and air. Such a mixture should consist of a strictly defined amount of air in relation to part of the fuel.

It is believed that 1 kg of gasoline should account for 15 kg of air. This is a normal stichiometric mixture in which a ratio of 1:14 is implemented.7. On such a mixture, the engine gives out enough power, while good fuel efficiency is achieved.

If you reduce the amount of air to the mark of 13 kg, then the mixture is enriched with gasoline, the motor gives even more power. In this case, the efficiency indicator is reduced. A further decrease in the amount of air leads to the fact that at first the mixture becomes rich, and then re.enriched. Ultimately, the ability of the mixture to ignition is reduced, with a ratio of 1: 5, such a mixture is no longer ignited.

Accordingly, an increase in the amount of air in the mixture compared to the norm leads to its implements. Fuel is saved on the depleted mixture, but the power is lost. If the ratio of the amount of gasoline and air is 1:21, then the mixture loses the ability to ignite. By the way, impoverishment does not allow saving in all operating operatives of the internal combustion engine, since the driver in loaded modes presses the gas more strongly to obtain the desired return from the engine.

So back to cotton. If the ratio of air and gasoline as part of the mixture is shifted in such a way that there will be more fuel, while the amount of air will not be increased, then the existing air will simply not be enough for the full combustion of the entire fuel charge. If otherwise, the uninhabited in the combustion chamber gasoline on the output tact through the exhaust valves enters the exhaust manifold. Further, the fuel passes through the catalytic neutralizer (if any), penetrates the muffler and at some point lights up from high temperature. As a result, an explosion occurs in the exhaust system.

Note that especially often shots in the muffler for this reason can be heard on carburetor cars, since problems with mixing formation are more characteristic of this power system. It turns out that if there are pops in the silencer during gas discharge or in other cases, the carburetor should be checked first.

Add that the injector is also not deprived of similar problems. The reason for the inspection of the metering system is departures on idle, during extension, etc.P. It is important to understand that such symptoms indicate the need to check both a carburetor and injector.

In such a situation, the driver can make an initial diagnosis. The quality of the mixture is checked by additional air supply to the inlet collector. If the pops have stopped, then the probability of strong contamination of the air filter, foreign objects entered the duct, etc.P. In this case, the air filter needs to be replaced, the duct is cleaned.

We also recommend reading the article on how to replace the car engineer of the car engine. From this article you will learn about the procedure and features of the air filter replacement procedure, as well as how to choose an air filter for the engine yourself.

If the replacement of the filter did not give results, then the engine with the injector will require an in.depth diagnosis. In the case of a carburetor ICE, you can check the fuel level in the float chamber of the carburetor on the spot. Although the level for different types of carburetors may differ, usually the float after removing and turning the carburetor cover is normal in a parallel position in relation to the plane of the cover. If the level turns out to be higher, then the float must be checked, as well as set the level of gasoline in the float chamber of the carburetor if necessary.

It is also necessary to take into account that if no longer so long ago replaced the nozzles, then the likelihood should not be excluded that the fuel or air nozzle turned out to be problematic. In other words, in the carburetor, the mixture is reversed, the fuel nozzle is poured or the air is selected incorrectly (the jet cannot give the required amount of air in relation to the amount of fuel supplied). The result is departures and pops at certain speeds under load, at transitional modes, when touched from a place, with sharp acceleration, etc.D. Also, in the muffler, it can shoot when braking the engine.

The problem with the ignition

Dot in the operation of the ignition system can also lead to the fact that fuel fuels shoots in the muffler, which has not burned in cylinders. The injector or carburetor does not create claps into the muffler during the discharge of gas not because of the malfunctions in the power system, but as a result of the impaired UOZ (ignition angle). If diesel shoots, pops in the silencer can be caused by a shot down angle of fuel injection.

The appearance of shots in the exhaust system suggests that the ignition is too later. The fact is that the spark on the spark plugs is created late, as a result of which ignition of the fuel charge begins when the exhaust valve is partially opened. In other words, the spark should be at the end of the compression tact, but there is no sparking. Next, the piston passes through the VMT and begins to go down, that is, its working move begins. Then the spark is formed and the charge is ignited.

Other reasons for shots in the silencer

We add that in addition to the main reasons that were described above, clapping in idle mode may indicate that the tightness in the intake manifold is disturbed. It is not yet to exclude the contamination of the idle system and other failures that are eliminated by cleaning and adjusting.

On injection engines, as well as diesel engines with ESUDs, failure of electronic sensors or violation of their contacts can also lead to shots in the exhaust system.

The fact is that the supply of incorrect or inaccurate signals for the ECU forces the control unit to calculate the fuel supply based on incorrect indications from the sensors. As a result, the mixture becomes too impoverished or re.enriched, which does not correspond to the real conditions. Quite often, with such failures on the dashboard, “Check” lights up. This indicates the need for computer computer diagnostics.

We also note that the timely ignition of the mixture and the full combustion is also affected by the compression indicator in the engine and the general degree of DIS pollution. With low compression, ignition passes may be observed, as a result of which unbroken fuel enters the release.

Also, the accumulation of soot in the combustion chamber often leads to the appearance of a caliper ignition, when the mixture lights up arbitrarily from the smoldering particles. In parallel with this, the accumulation of deposits on the valves and in the area of ​​the valve fit to the saddle can lead to its incomplete closure. As a result, the fuel falls into the release through the gap between the plate plate and its saddle.

Shoots into the muffler

The perpetrators of shots in a silencer on VAZ cars with carburetor engines are in most cases a carburetor, ignition system and a gas distribution mechanism.

The shots themselves in the silencer can be not only shots, but also with claps of various sizes from barely noticeable to well tangible. It can shoot in a silencer at different modes of engine operation. on idle, when pressed on gas during acceleration and movement, when discharging gas and accompanied by increased smoke, bay candles.

Shots and pops in the silencer are nothing more than an intensive aggravation of the re.enriched fuel mixture of the car thrown into the exhaust system. The size of shots and cotton depends on the degree of enrichment of the fuel mixture.

When diagnosing this malfunction in the operation of the car engine, you should first pay attention to the tightness of the exhaust gas production system. Entertaining air leaks through a rusted muffler or resonator may be accompanied by similar claps of various intensities.

Shots and pops in the silencer are usually accompanied by not stable idle move, increased fuel consumption, power loss and receiving of the car engine, and the smell of gasoline from the exhaust pipe.

Consider the reasons for the “shooting” in the silencer associated directly with the carburetor. Malfunctions in other systems leading to such a malfunction. the topic of a separate article.

Causes of “shots” and cotton into the silencer

Too high fuel level in the float chamber of the carburetor.

One of the main reasons for re.enriching the fuel mixture and subsequent violation of the engine operation. Check and adjust the fuel level in the float chamber of the carburetor (Sogers, Ozone).

Troubleshooting a Blown Fuse on Riding Lawn Mower

Fuel level in the float chambers of carburetors 2108. 21081, 21083 Sogers, 2105, 2107 ozone, after removing the cover. shown by the red line

The needle valve of the float chamber of the carburetor is faulty.

This is one of the main causes of overflow of fuel and severe enrichment of the mixture leading to firing to the silencer. Check the operability of the needle valve of the carburetor (Sogers, Ozone). Replace the faulty.

Check valve check on carburetors 2105, 2107 ozone, 2108, 21081, 21083 Sogers of the supply of vacuum through the tube

Pierced the float (floats on the VAZ 2108-2109).

A punched float is drowning, pulls the needle of the valve of the float chamber, gasoline flows uncontrollably and increases the level. It is necessary to visually inspect the float. Deformed or broken should be replaced or repaired. Smell tin on ozone, pave the soldering iron on Sogers. You should also pay attention to the parallel position of the float relative to the print on the cardboard laying of the carburetor cover, since if it is wrong, it can touch the walls of the float chamber and hold the needle valve constantly open.

Frolls of carburetors 2108 Sogers and 2105, 2107 ozone

Air nozzle is clogged or a channel of the idle system.

Air proportion/gasoline in the fuel mixture will immediately change in favor of gasoline. And this is a tangible enrichment with the consequences. Check and clean the air and fuel nozzles.

Air and fuel nozzles of carburetors 2108 Sogers and 2105, 2107 ozone with the “lid” removed

The EPHH system is faulty.

Check the operation of the forced idle (EPHH), which should turn off the supply of fuel at certain modes. Articles “EPHH System Carburetor 2108, 21081, 21083 Sogers”, “EPHH Carburetor EPHH system 2105, 2107 Ozone”.

Connection diagram of the control unit of the EPHH system of the carburetor Solex 2108, 21081, 21083

Falf valued Economizer of powerful modes of carburetor 2108 Sogers.

If the diaphragm of the power.repentant fuel is damaged by the fuel of the fuel through its channels rush straight into the engine cylinders. A particularly strong influx will be when the car with an open throttle shaspberry is open the second carburetor chamber. Article about the economizer on our website “Check and repair of the economizer of powerful modes of carburetor 2108, 21081, 21083 Sogers”.

The device of the power.reprimand modes of the carburetor 2108, 21081, 21083 Sogers

The gasoline pump is faulty.

Check the minimum protrusion of the gasoline pusher. Norm 0.8-1.3 mm. When it is exceeded, the gasoline pump will begin to escalate excess fuel into the float chamber of the carburetor. “Malfunctions of the gas pump of vehicles” VAZ “. The valve holds only 0.2-0.3 atmospheres.

Measurement of the protrusion of the tanososa tanosa pusher VAZ

By putting the listed systems and devices in order not only the disappearance of cotton and “shots” in the muffler, but also stabilize the speed of the idle move, increase its “pickup” and power.

Shoots and claps into a silencer, the causes associated with the gas distribution mechanism of the car engine

Small thermal gap at the exhaust valve (valves).

If the thermal gap in the outlet valve is less than the norm (the “clamped” valve) and, accordingly, the gap at the plate is more than necessary, the conditions for optimal combustion of the fuel mixture are violated since the compression drops immediately (the mixture does not compress to the desired value) and is ignited through the right time). The situation is formed again when the cylinder, it works, then no.

First of all, when shots and poppies appear in the muffler, you need to check or is clamped or the valve using a probe

The conditions of combustion of the fuel mixture will be violated. She will get used to it every other time, will not burn out completely and will be thrown into the exhaust manifold and further into the muffler, where he will burn out with claps and shots.

A similar situation is possible not only with a small heat gap, but also in the case of burning or destruction of the valve plane plate (“burned out” the valve) or a strong carbon on it and its rod.

Feature on the valves is the cause of a loose fit of the valve plate to the saddle in the head of the block and, as a result, shots in the muffler

The mutual location of the crankshaft and distribution shafts is broken.

In this case, the gas distribution phase displacement occurs. The spark can slip with open exhaust valves, which will lead to cotton and shots. The shafts should be stern stricts.

Installation tags for a camshaft pulley and the back cover of the engine drive of the engine 21083 VAZ 2108, 2109, 21099 cars

Cotton into a silencer, injector engine, causes

The appearance of cotton or even “shots” in the silencer indicates the occurrence of malfunctions in the operation of the car engine.

Clinkling in the silencer themselves. most often the result of explosive burning of fuel in the exhaust path of the engine. Consider the several of the most common causes of this malfunction applicable to the injector engine of the car.

Clinking to the silencer when operating the injector engine of the car, the cause of the malfunction

The mixture is impaired.

The engine works on too rich fuel mixture. It does not burn completely and its remains are thrown into the exhaust system.

The fuel injection system can lead to the formation of a rich fuel mixture: increased pressure in the system (fuel ramp) due to malfunction of the fuel pressure regulator, clogging of nozzles (they do not spray fuel, but pour).

Passes in the ignition system.

Clapping and “shots” are heard in the muffler due to the malfunction of the spark plugs (failed, a small gap between the electrodes, the soot on the electrodes), the ignition coils (module), “broken” high.voltage wires. Working through or completely refusing elements of the ignition system reduce the power of the spark on the electrodes of the spark plugs, or do not allow it to appear at all. The fuel in the combustion chamber does not burn and is thrown out on the output tact into the graduation tract.

Elements of engine control systems (ESUD) are faulty

Synchronizes the operation of the injection system with the position of pistons in the cylinders sensor of the crankshaft position (wood-polymer composives). Its malfunction, displacement, pollution. The malfunction of its wiring leads to untimely injection and ignition of fuel. As a result, the fuel is set on fire either too late or too early, or is not set on fire at all and is thrown out on the output tact into the production system of the engine, where it burned out with claps and “shots”.

In the ESUD, the Euro-3 and higher norms have a distribution shaft position sensor (phase sensor), which is also responsible for the timely injection of fuel. Its malfunction also leads to untimely injection and fire fuel.

Oxygen sensor (DC), at the signal from which the control unit (ECU) is guided by a rich fuel mixture or poor, in case of a malfunction, it will issue incorrect information and the block can increase the supply of fuel through nozzles. The mixture will be too enriched and not burn completely.

In addition, in the preparation of the fuel composition (injection duration, calculation of air volume, ignition moment) “participate”: the position of the throttle of the throttle (DPDZ), the sensor of mass air consumption (DMRV) or an absolute pressure sensor).

The car engine is faulty.

The phases of the gas distribution during the repair or replacement of the belt are knocked down. The position of the crankshaft and distribution shafts regarding each other is put incorrectly. Fuel injection and its settings will not coincide (or will not quite match) with engine tactes.

Valve defective. Their heat gaps are not adjusted (the valve does not completely closed and the compression and the mixture is thrown into the exhaust manifold). The valve burned out and the tightness of the combustion chamber is disturbed, which also leads to the release of the mixture and cotton into the muffler.

Nar on valve plates. Foreth prevents the tight closure of the valve.

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