Why gasoline does not flow into the engine: main reasons

The engine is the most complex system of any motorcycle, which is most susceptible to negative environmental influences. If your Minsk motorcycle does not start after a major overhaul, winter downtime, or for no apparent reason after an hour-long stop somewhere along the road, then this article is just for you.

The reasons for a motorcycle engine failure and the conditions leading to it may be different. Performing the following simple steps can help you quickly find and fix the problem without the help of specialists.

Why is fuel not getting into the cylinders? 4 reasons

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DetailsCategory: Repair workCreated: 07/11/2013 11:37 Author: Auto Observer Why does fuel not enter the cylinders? Surely, many car enthusiasts would like to know the answer to this question.

In this article we will look at several reasons for this phenomenon. It happens that it is impossible to start the power unit of a car due to fuel not getting into its cylinders. Moreover, this problem is typical for both engines with a carburetor power supply system and injection units.

Why do such situations occur, and how to deal with them?

Why isn't fuel getting into the cylinders? Causes:

So, the first and simplest reason is the lack of fuel in the fuel tank. It can be caused by its damage, when all the fuel simply leaks out. In addition, the fuel lines may be damaged and gasoline will not reach the power unit.

Another reason why fuel does not enter the cylinders is failure or interruption of the fuel pump. Carburetor cars use a mechanical pump, while injection cars use an electric pump. However, each of them can break. The first has a weak point - membranes, and the second is “afraid” of working “dry”.

In addition, its supply wire may break. Mechanical pumps can often fail in extreme heat. In this case, fuel is not pumped at all. Another problem with electric pumps may be insufficient pressure in the fuel line created by them.

As a result, the on-board electronics do not supply fuel to the cylinders, since the pressure in the power system is insufficient. It is difficult to diagnose such a malfunction in the field, so you will have to seek help from specialists.

Another common reason why fuel does not enter the cylinders is clogged fuel filters. Electric pumps have mesh filters in the fuel tank itself.

They can become clogged over time and interfere with the normal intake of fuel. In addition, any unit is equipped with a fine filter for incoming fuel.

Moreover, if it is severely clogged, it is possible to completely block the flow of fuel.

Carburetor cars also have a filter at the inlet to the carburetor. If it is clogged, problems with starting and fuel supply may also occur.

In any case, clogged filters must be thoroughly cleaned or completely replaced (if possible).

A rare, but still occurring phenomenon is serious clogging of the carburetor or injectors of an injection engine.

In addition, the carburetor may have a very low level of fuel in the float chamber.

As you can see, there are many reasons why fuel does not enter the cylinders. However, most of them can be easily eliminated even in the field without the help of service workers.

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How to check the fuel pump?

The most reliable diagnostic method is to check the gasoline pressure in the fuel line. On sale you will find ready-made kits with adapters for connecting to the most common power systems. You can build the device with your own hands from a pressure gauge with a scale of up to 6 kg/cm2, a hose, adapters and fittings.

To check the pump you need:

1. Relieve the residual gasoline pressure in the line.
2. Connect the pressure gauge across the engine power supply system. Some cars have a standard fitting to check the performance of the pump.
3. Turn on the ignition. A value of 3-4 kg/cm² is considered normal. The exact parameters for a specific engine are in the repair and operation manual.
4. Start the engine. A working fuel pump creates excess pressure (about 7 kg/cm²), which is released into the tank by the regulator. Therefore, in all engine operating modes, the pressure in the ramp should not deviate significantly from the standard values. When diagnosing, try to simulate the conditions under which the symptoms of a faulty fuel pump manifest themselves most often (engine temperature, load, etc.)

If the measured value is lower than acceptable, the fuel pump on your car is faulty or the fine/coarse filter is clogged. In this case, the fuel pump heats up, which can lead to melting of the housing and burnout of the electric motor.

No fuel is supplied to the gasoline engine: injector and carburetor

Let's start with the fact that during the operation of the car, drivers quite often encounter the fact that the engine does not start, runs intermittently, or suddenly stalls. In this case, diagnostics usually affect the ignition system (on gasoline cars) and the power system.

As practice shows, unstable operation of the power unit on gasoline cars is in many cases due to the fact that gasoline is not supplied to the engine. In this article we will talk about why this happens, as well as what the driver should do if there is no gasoline entering the engine.

For what reasons is fuel not supplied to the cylinders?

So, the general scheme of operation of the power system involves taking fuel from the gas tank, after which the fuel enters the carburetor or injector.

Next, the fuel is supplied to the intake manifold, then the fuel-air mixture enters the combustion chamber through the intake valves.

It becomes clear that if gasoline does not flow into the engine, then this problem occurs both on engines with a carburetor and on injection internal combustion engines.

The simplest reason can be considered a lack of gasoline in the tank or damage to the fuel lines.

In other words, we are talking about leaks as a result of any damage to the tank or fuel lines, when gasoline leaks out before it gets into the cylinders.

Common problems with the supply of gasoline to the internal combustion engine

• If we exclude leaks, the next reason why gasoline is not supplied to the engine is various problems with the fuel pump. Note that on cars with a carburetor there is a mechanical type fuel pump and is located in the engine compartment.

At the same time, injection engines have an electric fuel pump. This pump is located directly in the fuel tank.

If we talk about a mechanical device, then often its breakdown or incorrect operation results from damage to the membranes, as well as overheating.

The electric fuel pump usually fails in cases where it operates with a minimum amount of fuel in the tank. The fact is that cooling of this type of pump occurs precisely due to fuel. You should also highlight problems with the fuel pump relay or a break in the wiring through which it is supplied with electricity.

Let us add that if the device is not able to create the required pressure in the fuel system (no or low pressure), then the injectors on some internal combustion engines may not open, and in this case the engine will not start. In other cases, the injectors still open, but there is still not enough fuel.

In this case, the unit begins to work intermittently, stalls in different modes, etc.

At the initial stage, it is necessary to measure the fuel pressure in the fuel rail of an injection engine, while at the same time not forgetting about possible problems with the pressure regulator in the rail.

• Another problem that prevents fuel from getting into the engine cylinders is dirty fuel system filters. In addition to the usual fuel filter, the injector also has a fuel pump mesh, and in the event of severe contamination of the fuel pump mesh filter, the performance of the device drops noticeably.

If the fine fuel filter becomes dirty, then the flow of fuel into the engine can be completely blocked. As for the carburetor, these cars also have a fuel filter, which is usually installed in front of the carburetor. If the filter element becomes clogged, then difficulties begin with starting the engine and supplying fuel in different modes.

To avoid the above problems, filters must be changed promptly on both carburetor and injection engines. You also need to remember that the filter mesh on the fuel pump needs to be periodically cleaned or completely replaced with a new one every 50-60 thousand km. mileage

• The list of possible causes of a malfunction in the fuel supply to the engine ends with contamination of the carburetor or injection nozzles, as well as failure of individual elements. As a rule, the jets in the carburetor can become clogged, and the nozzles in the injectors are subject to contamination. Debris and deposits may also partially or completely block thin channels, etc.

We also recommend reading the article on how to clean the fuel pump mesh. From this article you will learn about the signs that indicate the need to clean the element, as well as how to clean the fuel pump mesh filter with your own hands.

To prevent this from happening, the injector must be periodically cleaned using one of the available methods (ultrasound, special cleaners on a bench, etc.). It should also be added that the carburetor may require cleaning, repair or separate tuning. For example, an insufficient amount of gasoline in the float chamber will result in insufficient fuel for normal operation of the internal combustion engine.

What's the result?

As you can see, if you have certain skills and knowledge, you can determine why gasoline does not flow into the engine both on engines with a carburetor and on injection power units. However, many problems can be solved yourself. For example, it is quite possible to repair, clean and adjust a carburetor in a garage. The same can be said about cleaning injectors yourself.

We also recommend reading the article about why the fuel pump does not pump gasoline when the ignition is turned on.

From this article you will learn about the main reasons why the pressure in the fuel system does not increase after turning the ignition key in the lock or when the fuel pump of an injection engine is activated.

Finally, I would like to note that timely replacement of fuel filters, regular cleaning of the injector or carburetor, as well as driving on good quality fuel are the key to the proper operation of the power system of a gasoline or diesel engine.

It should also be remembered that on injection internal combustion engines it is extremely undesirable to leave a minimum of fuel in the tank, since deposits and debris at the bottom begin to be sucked into the fuel pump, as a result of which the device not only cools worse, but also intensive contamination of the fuel pump mesh occurs with all the ensuing consequences.

Also, driving with a half-empty tank in winter leads to the active formation of condensation, which accumulates in the gas tank. As a result, condensate (water) not only settles at the bottom and enters the combustion chamber, but also causes severe corrosion of the tank walls.

Why did gasoline get into the engine oil?

The design of the internal combustion engine determines the difference in the fuel supply for the operation of technical components. The ways in which fuel penetrates the vehicle's lubrication block also differ.

The presence of gasoline in motor lubricant is manifested by:

1. Presence of extraneous noise.
2. Reduced power.
3. Engine malfunction.
4. Increased fuel consumption.
5. Changes in exhaust gas characteristics.

Important! Violation of the correct operation of the engine requires diagnostics to identify the cause and eliminate the violations that have arisen.

The reasons for the problems that arise are as follows:

1. Worn, malfunctioning chassis parts. Lack of ignition, sufficient compression in the cylinders.
2. Loss of performance of the fuel pump.
3. Malfunction of injectors, carburetor.
4. Ignition malfunction.
5. Enrichment of the fuel mixture.

When gasoline is detected in the oil, the problems are often hidden in the engine. Irregularities in ignition and power supply.

The cause of severe complications due to fuel leakage into the engine mixture is the use of counterfeit fuel. Gasoline changes the performance characteristics of the lubricant. There is a change in smell, color and consistency. The oil does not perform the necessary functions.

Why does the engine stall?

The engine shakes, the speed is unstable, especially at idle - these are the consequences of a cylinder failure.

Why exactly? The most common engines were and remain four-cylinder ones, therefore, when one of the cylinders is turned off, the engine has to work on the remaining three, hence the “troit”.

What happens to engines that have more cylinders? There is another opinion here - it’s not because there are three cylinders left to work, but because there are four strokes in an internal combustion engine - intake, compression, power stroke and exhaust - and when one of them turns off - the power stroke, because on the other strokes it does not affect, then three bars remain, hence the triple. Moreover, not only one cylinder can be switched off, but almost all at once in turn. This is also the correct version, but not everyone understands it.

Consequences of a non-functioning cylinder

Even when the cylinder is not working, fuel continues to flow into it, but as a rule it does not burn. Gasoline is a good solvent and washes away the entire oil film from the cylinder walls, hence increased wear of the rubbing surfaces - the piston, rings and cylinder. The gasoline that does not escape into the pipe safely flows into the engine sump, eventually diluting the oil.

Without oil, the pistons move dry, which causes more friction, as well as all kinds of scuffing. But overheating won’t happen; there’s nothing to burn.

Reasons for turning off the cylinder

In order for the engine to operate normally, it must receive a fuel-air mixture, which at a certain moment is ignited by a spark. Based on this, you need to look for the reason, what is missing for ignition.

This could be a problem with the fuel supply (fuel is not supplied, it is poorly atomized, there is too much gasoline, and therefore cannot burn), there could be problems with the air, for example, the intake manifold is clogged. Problems can also arise in the absence of compression, when valves burn out, rings break, the piston burns out, or the hydraulic compensator simply freezes.

Now let's look at these problems in detail.

No spark

A spark is needed to ignite the fuel-air mixture, and may be absent for several reasons:

• The spark plug is faulty (you can see typical faults of spark plugs)
• high-voltage wire pierces / high resistance / jumped out of place
• inoperative high-voltage ignition coil
• no power to the ignition coil if a system with individual ignition coils is used
• wires are mixed up
• the distributor breaks
• or other electrical problems in the ignition system, there are many ignition systems.

To restore functionality, it is necessary to identify the faulty part and replace it. This is best done by replacement, for example, remove the high-voltage wire from the working cylinder and replace it with the high-voltage wire of the non-working cylinder; if no changes occur, then the problem is not in the wire, we look further.

No fuel

It's a little easier here. On an injection engine, fuel enters through the nozzle, which means that the reasons for the lack of gasoline are connected precisely with it:

• the injector is clogged and does not allow fuel to pass through, or does not spray it, but simply pours
• no power to injector

If you unscrew the spark plugs and turn the engine with the starter, a fuel-air mixture should fly out of the spark plug holes, like small droplets of gasoline. If they do not fly, it means that fuel is not reaching that cylinder and the reason is in the injectors.

Air and compression

To ignite the fuel, air is needed, and even under pressure, otherwise the spark will not break through and ignite it. In order for air to flow, it is necessary to check the air supply system to see if anything is clogged.

There was a case when, when repairing a car, they covered the intake manifold with a rag so that nothing would get into it, when they started to start it, the rag itself didn’t pull out, and it safely completely blocked one of the cylinders, even fuel from the injector was absorbed into it.

Also, air may not flow if the intake valves do not open, for example, if the hydraulic compensator jams. Or if this air comes out due to the same hydraulic valve and a slightly open valve, and the valve may burn out and leak.

The piston may also burn out or the rings may break. In general, you just need to measure the compression, and the reasons associated with compression can be found in the link I gave above.

Another reason could be a broken vacuum brake booster. It is connected to the intake manifold by a tube, and if it is broken, then unaccounted for excess air enters the manifold. This leads to the fact that the air flow meter gives one data, but a completely different amount of air comes in. But this is easy to check; you just need to shut off this air source.

Fuel

If the fuel quality is low, ignition problems may occur and detonation may occur. And most cases of unstable engine operation are related to fuel - you went to a gas station, filled in something incomprehensible, and then think about what happened to the car.

The moment of fuel injection into the manifold (distributed injection system) is absolutely not important; there are systems where fuel is injected by injectors into all cylinders at the same time, so even if you intentionally mix up the wires going to the injectors, it should still work.

Another thing is a diesel engine, here the fuel system supplies fuel and determines the ignition timing, so nothing can be confused in diesel engines, neither the injection timing, nor the injection sequence.

But on diesel engines it happens a little for other reasons - the injector may fail, then one cylinder turns off, or the pump may not be set correctly at the moment of injection, then all cylinders will not work correctly, but this is only for mechanical fuel injection pumps.

The common rail system is more similar to a fuel-injected car, but the most similarities are with direct injection.

But with a diesel engine it is more difficult - there are several systems, each of which works in its own way, and to understand what led to the unstable operation of the engine, you must first of all know which system is installed on the car.

Fill with good fuel, use high-quality spare parts, carry out maintenance on time and you will be happy!

Source: https://kakavto.com/?p=261

How to fix the problem?

If a problem is detected, diagnostics are carried out and the oil is replaced. Do not operate the vehicle if gasoline gets into the lubricant.

The situation is resolved in the following ways:

1. On one's own. High speed running will help remove fuel from the crankcase. The oil needs replacing.
2. With the help of service station specialists. The seriousness of the problem requires professional intervention.

If there is a smell of fuel, check the spark plugs. If the spark plug is damaged, part of the fuel mixture does not burn and leaks, mixing with oil. The appearance of a red coating on the spark plugs indicates the use of low quality fuel.

Problems with injector nozzles can be eliminated by flushing with a special liquid. Parts that are damaged are replaced with new ones.

The gaskets of the electric pump that supplies fuel are carefully inspected. Any detected damage requires replacing the gaskets.

Malfunctions of the piston system are best repaired at a car service station.

No fuel supply to the engine - causes, solutions

Content:

In civilized countries, the concepts of “driver” and “car mechanic” are completely different. And if the car stalls or starts to work intermittently, the “driver” will simply stop and call a repair team.

And if he’s in a hurry, he’ll leave the car on the side of the road, and he’ll get to his destination on passing cars, and only then take care of his vehicle by contacting the same car service center.

That's the case with us. If the car “sneezed” or the engine stopped, the first thing the car owner will do is to go looking for the cause on his own and try to fix it, without any services.

It doesn’t matter whether an experienced driver is behind the wheel or a novice – everyone gets under the hood.

But the difference in this is significant - the driver, who has driven tens of thousands of kilometers, is familiar with the structure of the car and at least knows where to look for a malfunction.

But beginners in technical terms are usually poorly prepared and often look for a problem where it cannot arise at all. The following material is intended specifically for novice car owners who are just learning the basics of owning a vehicle.

In general, if the car simply stalled on the highway for no apparent reason (the engine stopping was not accompanied by a rumble, grinding sound, etc.), then the reason must be sought in two systems - ignition and power supply, and the latter more often becomes the reason for the power plant stopping. Therefore, if the engine stalls, you should check the power system, but you need to know where to start.

Spark test

To check the Minsk motorcycle, you need to remove the spark plug and unscrew the spark plug. Next, you should immediately determine (wet or dry) the spark plug contact.

If the contact is wet, then most likely there is a problem with the spark plug in your motorcycle. If the contact is dry, then you should look for a problem in the carburetor.

Since the spark plug has already been unscrewed, you can diagnose and verify its functionality. Before checking for a spark, the correct gap between the spark plug electrodes should be set.

According to the technical recommendation of the Minsk motorcycle manufacturer, the required gap should be from 0.4 to 0.7 mm, depending on the model. The gap is set using a feeler gauge, which can be purchased at any auto or motorcycle parts store. If you work on the Minsk motorcycle yourself, then this tool should already be in your kit.

To check the spark on a removed spark plug:

• insert the candle into the candle holder;
• short-circuit the spark plug body to ground;
• activate the winding stem.

Attention! When checking the spark plug, you must hold it only by the installed candle holder, otherwise electric shock may occur.

It should also be noted that spark is different. The correct working spark should always be the same, clearly visible, and always pass in the same place.

If a spark does not jump between the contacts of the spark plug, then it is necessary to check again, but using a different spark plug. If after re-checking a spark appears, this indicates that the installed spark plug was faulty and should be replaced. If there is still no spark, then you need to check the ignition system of the Minsk motorcycle.

Fills spark plugs with gasoline: why and how to start the engine

Hello, dear car enthusiasts! Maybe not all, but many motorists are faced with this problem: yesterday I arrived, put the car in the garage, everything was fine. This morning I started to start the engine, but it would not start.

There could be a number of reasons for this. But today we will look at the most common one - filling the spark plugs with gasoline, it doesn’t matter whether you have an injector or a carburetor. Fills spark plugs with gasoline regardless of the type of fuel system of the car.

It is characteristic that the spark plugs are filled with gasoline less often in the warm season, and more often at sub-zero temperatures. So let’s try to figure out in order: why the spark plugs in the injector are flooded, what to do to start the engine at the exact moment when they are flooded, and how to prevent them from being flooded with gasoline in the injector.

Reasons why the spark plugs in the injector flood

Calcination of spark plugs filled with gasoline

In principle, the reason why the injector spark plugs flood is simple. And the tones lie in the peculiarities of the “electronic brain” of your car.

At subzero temperatures, mixing the fuel-air mixture requires some effort: more oxygen in cold air requires more gasoline. Accordingly, the ECU gives a command to the injector nozzles to increase the fuel supply, which they do in good faith.

And the following happens in the engine, especially if your car no longer has a new battery. The injectors supply fuel to the combustion chamber, the starter tries to create the necessary compression in the cylinders, while at the same time trying to provide a spark to generate a flash. Do not forget about the quality of fuel, which does not have ideal parameters.

Control system diagnostics

The inability to start can also be caused by the failure of some sensors of the electronic control system:

• DMRV;
• crankshaft angular position (CPAP);
• speed (KS);
• phases (DF).

The connection between the on-board network and the control unit may weaken—the “CAN connection malfunction” error, which can easily be fixed on your own.

It is generally accepted that diagnosing an electronic engine control system is the domain of highly qualified specialists. However, any modern controller has a built-in self-diagnosis system, thanks to which even a non-professional can independently find possible malfunctions and their causes.

In addition, the controller's diagnostic data can be read using a diagnostic tester, purchased separately, or a personal computer (PC) with a special program installed on it, downloaded from the network. To connect the PC to the control system, a K-line diagnostic adapter is used. If digital technology is not your thing, you most likely cannot do without contacting a diagnostic center.

So, if the engine does not start, you need to check: the supply of fuel, air, spark supply, error signals of the electronic control system and pressure in the combustion chamber. Even if you are unable to fix the problem yourself, you can at least determine the causes yourself.

One/two cylinders do not work: what to do?

Missing. All drivers know this problem, only in folk mechanical slang it is called a little differently.

One cylinder is not working, what should I do?

“Engine trouble” is the name given to a malfunction when one cylinder in the engine does not work. There are times when two cylinders do not work at once. But this happens very rarely. Therefore, let us consider in detail the situation when one cylinder does not work.

Moreover, the causes of the malfunction, their search and elimination, equally apply to the situation when two cylinders do not work.

By what signs do you know that one cylinder of the engine is not working? It's simple. Based on body vibration, interruptions in the work cycle and a strange sound that differs from the smooth operation of the engine. You will understand. If the engine is running rough, you can’t help but notice it in the car’s behavior.

For a driver who is little familiar with the structure and operating principle of the cylinder head and the cylinder block itself, the question arises: is it possible to move (moreover, drive for a long time if one cylinder is not working).

In principle, yes, it is possible. But, this won't last long. The engine will fail or you will run into problems with the engine, the number of which will force you to fork out not a tidy sum, but a huge one.

Before analyzing the reasons why one or two cylinders may not work, let’s briefly consider the consequences of neglecting this malfunction.

What does driving with an inoperative engine cylinder lead to?

Fuel entering an idle cylinder does not burn. It is mixed with oil. It washes it off the cylinder mirror and enters the crankcase. Not only is the dry surface of the cylinder subject to mechanical damage, the so-called. scuffing, and oil diluted with gasoline does not fulfill its function of lubricating the remaining working cylinders.

This, accordingly, also leads to failure of the remaining cylinders. That is, boring the cylinder block, and maybe lining, is 100% guaranteed.

Another bad news if one cylinder does not work is the possibility of engine overheating with all the ensuing consequences. The engine begins to change temperature. It heats up, because the oil has lost its quality, and in addition to lubrication, it also serves as a heat sink.

There are probably enough consequences to make you wonder whether you can continue driving if one cylinder is not working.

How not to get confused if your lawn mower won’t start

The instrument, despite its small dimensions, is a complex technical device. If you study the operating instructions, it turns out that the reasons why the lawn mower does not start are known and can be eliminated. It is necessary to consistently eliminate factors that make it difficult to start the tool. Usually they start with more accessible nodes with easy testing of serviceability.

Troubleshooting

All the reasons why a lawn mower does not start can be classified according to the specific operation of individual components. The service center classifies faults as follows:

• engine malfunction (piston wear, bearing failure, crankcase crack);
• malfunction of the fuel mixture supply - clogged air filter pores or carburetor malfunction;
• The ignition system does not work;
• mechanical failure - leaking hoses, broken wires under the braid, rupture of tubes.

The user first needs to check whether there is fuel in the tank. Start up according to the instructions, placing the saw on its side. Set the air damper to the “closed” position, pump up the fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine starts, open the air damper. The lawn mower does not start - we repeat the operations with the air damper slightly open.

The brush cutter cannot work for a long time. The gearbox and motor will overheat. You can mow for no more than 15=20 minutes, taking a five-minute break. On a hot afternoon, the operating time is halved. When mowing weeds and sedges, the work time must be reduced.

If the launch fails, we begin to look for the cause of the failure:

• check the quality of the fuel;
• make sure the spark plug is working and the spark plug channel is clean;
• check the cleanliness of the air filter;
• make sure that the fuel filter is not clogged;
• check the cleanliness of the breather;
• clean the exhaust channel.

More complex reasons will be those detected during diagnostics of a malfunction, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal halls with loss of vacuum. Repairing a lawn mower yourself if it won't start will require patience.

Eliminating the reasons why the lawn mower does not start

The fuel mixture must be prepared with exact adherence to the proportions of gasoline and oil. In this case, you cannot use another brand of fuel. To prevent dirt from getting in, gasoline should sit in a glass or metal container for 2 days. Do not use plastic containers to store fuel. Measure the oil accurately using a medical syringe without a needle. Use only freshly prepared mixture, without leaving unused fuel in the tank. If the engine is capricious, the lawn mower stalls; when you press the gas, the fuel may be to blame.

The lawn mower does not start when hot - press the gas trigger and sharply pull the cord several times until the engine starts, then lower the trigger. If it won't start, it requires specialized repairs.

Checking the ignition system, if the lawn mower does not start, is carried out sequentially:

• Clean the removed spark plug from carbon and dirt, dry it, set the gap to 1 mm;
• connect to a high-voltage wire and check for a spark by pulling the starter several times;
• if there is no spark, check the high-voltage wire for integrity;
• replace the spark plug;
• dry the spark plug channel;
• At the same time, the operation of the ignition coil is checked; it is faulty if the working spark plug does not spark.

It is in the event of a malfunction of the ignition coil that the lawn mower does not start hot, stalls, or operates intermittently.

Cleaning or replacing the air and fuel filters will ensure proper flow of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If nylon fabric is used, it is washed and the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the suction pipe open. You can determine whether the air filter needs to be replaced if the engine starts with the air cleaner removed. A dry spark plug will tell you if the fuel supply grid needs to be changed if the lawn mower does not start.