The lawnmower does not start well when hot

Plunger pair worn

Wear and malfunction of the high pressure fuel pump is a common cause of difficult hot starting of a diesel engine. A heated diesel engine does not start in such cases due to wear of the plunger pair of the injection pump.

To do this, you can pour water on the injection pump. It is also advisable to cover the fuel pump with a wet cloth. A successful start of a diesel engine after such manipulations will mean that the reason for a bad start of a diesel engine on a hot one is a strong wear of the plunger pair.

Aging of the stuffing box or a broken pump shaft sleeve may also be additional causes. Such malfunctions indicate that there is an air leak in the fuel pump. Under these conditions, the part is not able to create the required pressure in the area of ​​the plunger. This means that repair of the high pressure fuel pump is required, which implies the replacement of the oil seal and shaft sleeves.

Diesel injectors are not tight

The next reason why a diesel engine does not start well when hot is the lack of tightness of the injectors. After the engine is stopped, some of the fuel continues to flow through the injectors into the combustion chamber of the diesel engine. Excess fuel prevents the subsequent start of a hot diesel engine.

Wet plugs will mean that the injectors are leaking diesel fuel after stopping the engine. In such conditions, try to start the diesel after opening the throttle valve. This will release the pressure in the cooking chamber. To eliminate the malfunction, it may be necessary to repair or replace the injectors with new ones. Fuel overflow is also allowed due to wear of the injector O-ring.

Hot diesel engine will not start

After a trip and a short period of inactivity, starting the engine can be difficult. It does not start well on a hot diesel engine, which had previously started up normally on a “cold” one, after that it warmed up and fully reached the operating temperature. In the process of troubleshooting, it is worth considering the specifics of the diesel engine separately.

Diesel fuel is not able to actively evaporate in comparison with gasoline, and the flash occurs from compression, and not from a spark. The second feature is that if the diesel engine initially started up “cold”, then such an engine has no critical problems with compression, starter, battery, glow plugs and fuel lines. The problem of low-quality diesel fuel can also be eliminated.

The most common answer to the question why a diesel engine normally starts up “on cold”, but does not start well “on hot”, is the failure of individual elements of the fuel equipment and electrical equipment. A hot diesel engine most often does not start for several reasons:

  • Injection pump;
  • sensors;
  • diesel injectors;

The sensors are out of order

The diesel engine may not start well when hot as a result of a malfunction of the coolant temperature sensor in the cooling system. If the coolant temperature control sensor supplies incorrect values ​​to the ECU or is out of order, then the control unit does not correctly regulate the fuel supply.

A malfunction of the injector needle lift sensor leads to the fact that the injection angle is violated. Additionally, it is worth checking the serviceability of the pressure sensor in the fuel rail.

The above are the most common reasons why a diesel engine does not start well when hot. Also, a hot diesel engine may not start as a result of faults that are directly related to the drive of the high pressure fuel pump.

Why does the starter turn normally, but the engine does not pick up, does not start. The main causes of the malfunction, checking the fuel supply systems, ignition. Advice.

Difficult hot start of a carburetor, injection and diesel engine. Major malfunctions: overheating of the carburetor, sensors, nozzles, injection pump.

The reasons for the difficult start of a cold engine. List of faults. What you need to check to diagnose and more accurately determine the problem.

The reasons for the difficult cold start of the diesel engine. Compression, glow plugs, diesel injectors, high pressure fuel pumps, wax or water in the fuel system.

The machine will not start after replacing the timing belt, timing chain or other work on the timing mechanism drive. Main reasons, recommendations.

Why does it flood spark plugs on injection and carburetor engines: the main causes of wet plugs. How to dry candles and start the engine, tips.

Carburetor motor

To begin with, we will analyze why the carburetor engine does not start up hot. In this case, the reasons are quite simple, but not clear to many owners of such vehicles. specifically, this effect occurs mainly during hot summer periods.

Let us explain why a carburetor engine may not start when the engine is hot. Since the carburetor does not have autonomous cooling, then after the power unit stops working, the unit begins to heat up strongly from the red-hot engine. As a result, the existing fuel in the float chamber evaporates and forms air s. To eliminate the malfunction, it is worth pressing the gas pedal once all the way. This will help squeeze out the air.

The second reason for this effect on a carburetor engine is the filling of spark plugs. So that the envy of the engine, many motorists press the gas pedal several times to supply fuel. At the same time, no one thinks that a mixture is being enriched, which is already rich.

Often, gasoline simply floods the candles and the air-fuel mixture cannot ignite due to the lack of a spark.

Motor will not start when hot

Many motorists have encountered this effect. a heated engine does not start. For different types of power units, this problem will be classified in different ways, and the malfunction should also be looked for in different places.

ENGINE WON’T START WHEN HOT (FIX)

Diesel

For a diesel engine, the primary reason is the high pressure fuel pump. Often the cause of the malfunction is quite simple. failure of the oil seals and bushings. Routine site maintenance will help in this case. On the other hand, the reason may lie in the breakdown of the plunger pair, which actually leads to a major overhaul of the element.

Another element that will affect the start of the engine on hot becomes the temperature sensor of the control nozzle. Failure of this electronic element will cause a change in the injection angle. To fix the breakdown, it is worth replacing the sensor.

As for injection engines, and for a diesel power unit, a malfunction of the engine control unit disrupts the operation of all systems. To fix the problem, you will have to connect to the motor and carry out repair and diagnostic operations.

Injection power unit

With a carburetor engine, everything is very clear, but in the case of an injector, it will be necessary to tinker a lot. First of all, it is recommended to check the temperature sensor of the cooling system. It is because of incorrect data that the electronic engine control unit can disrupt the fuel supply and create a lean mixture.

The next place to look for a malfunction is the injectors. It is the defective fuel injection that can lead to the fact that the engine will not start well, not only on a hot engine, but also on a cold one. To check the elements, you need to dismantle them from the car, and then check them at a special stand.

It is also worth paying attention to the fact that there may be a rupture of the membrane of the fuel supply regulator. As a result, gasoline enters the intake manifold, which leads to an enrichment of the combustible mixture. In turn, the re-enriched mixture is difficult to ignite, and in most cases it does not burn at all.

But, for an injection motor, these are not all reasons. Previously, the most common ones were considered, but now it is worth considering the less common causes. Let’s start with the fact that the check valve of the gasoline pump may fail, which will pump fuel back and after the engine is turned off, there will be no gasoline in the system until the next start of the gasoline.

Also, gauges and gauges can affect re-hot start of the motor. So, the failure of the following meters can make it difficult to start the engine hot:

  • Crankshaft position sensor. Incorrect measurement of the crankshaft position leads to the fact that the data entering the electronic engine control unit is not reliable, and, accordingly, the normal supply of fuel to the combustion chambers will be disrupted.
  • Mass air flow sensor. If this meter fails, then air can enter in large quantities, which leads to an incorrect air-fuel ratio. In turn, this becomes the cause of a poor start of the motor.
  • Idling sensor. This meter is involved in starting and primary operation of the engine, and therefore its failure makes it difficult not only to start the power unit, but also to idle it.
  • High voltage wires. On an injection motor, it is quite difficult to identify a malfunction of high-voltage wires, since they indirectly relate to many malfunctions. But checking the elements is quite simple. To carry out diagnostic operations, it is necessary to dismantle the elements from the vehicle and ring each element with a tester. Resistance should be about 5 ohm.
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Another significant reason for a poor start of an injection car is the failure of the software of the electronic engine control unit. To determine the malfunction, you will have to connect directly to the on-board computer and conduct a full diagnosis. If you find any faults, you should fix them.

Many motorists try to fix the problem on their own. This is not recommended, since you can only harm. As practice shows, it is worth contacting professionals who quickly classify the malfunction and eliminate it.

Find the cause of the malfunction. the engine does not start up hot, you can do it yourself, or you can contact a car service. You just need to do it on a carburetor engine. Much more difficult. for the injector and diesel. It is not always possible to eliminate the malfunction on your own, therefore it is recommended to contact a car service to professional specialists.

Chainsaw won’t start

Every person who is familiar with gasoline-powered tools knows that sometimes the equipment works intermittently, or it may stall at one moment and will not start again. There are a lot of reasons why the chainsaw does not start, we will try to consider the most common of them.

  • Why does the chainsaw start badly?
  • Fuel and air filter
  • Reduced compression
  • Carburetor adjustment
  • Spark plug
  • Ignition coil
  • The gap between the ignition coil and the flywheel
  • Chainsaw will not start when hot
  • Malfunctions in the ignition system
  • Fuel system problems
  • Chainsaw does not start well when cold
  • Violation of the sequence of actions when starting on a cold
  • Fuel problems
  • Malfunctions in the engine
  • Chainsaw stalled and won’t start
  • Engine jammed
  • Broken fuel line
  • Overheat
  • Video
  • Outcome

Chainsaw does not start well when cold

Why does the chainsaw start badly?

  • fuel and air filters;
  • reduced compression;
  • carburetor adjustment;
  • spark plug;
  • ignition coil;
  • the gap between the ignition coil and the flywheel;

Let’s consider each reason in more detail.

Fuel system problems

If during inspection it was found that there is a spark, and the spark plug is dry, then there are problems in the fuel system. Checking it should start with the fuel filter. Next, you need to inspect the fuel hose and its attachment to the carburetor, pay attention to fuel leaks from the carburetor and the presence of gasoline in the air filter housing. It is advisable to start removing the carburetor only if visual inspection did not allow determining the cause of the breakdown.

A common symptom of a problem in the fuel system is excess fuel in the engine cylinder. Typically, this is indicated by an overly wet spark plug and the presence of a spark at the plug contacts. In this situation, it is necessary to turn the chainsaw so that the plug hole is directed downward. If, at the same time, gasoline flows from the cylinder, then the reason that the chainsaw does not start is the overflow of fuel into the engine.

“Fills” with fuel, sometimes due to improper adjustment of the carburetor, or its malfunction.

You can familiarize yourself with the process of adjusting the carburetor using the example of the Champion 254 saw, by watching the video instruction.

Reduced compression

One of the most common cases of difficult starting a chainsaw is wear of the CPG (cylinder-piston group).

As you know, for the normal start of a chainsaw, compression must be present in its engine. It is necessary for the normal compression of the fuel mixture in the engine cylinder, it also affects the operation of the fuel pump.

During the operation of the tool, the value of the compression ratio falls, and the chainsaw starts to start poorly.

The reasons for the lack of compression, or its reduction, may be natural, because the engine wears out during operation. Also, problems can be caused by a serious breakdown, for example, a seizure of the CPG, or a broken piston ring.

A sign of reduced compression is a weak resistance of the starter when starting. With reduced compression, a decrease in the power of the chainsaw is observed, which negatively affects its performance. The problem is eliminated by replacing the piston rings, or completely by the CPG.

The gap between the ignition coil and the flywheel

An incorrectly set gap between the flywheel and the contacts of the ignition coil affects the quality of sparking, which in turn is responsible for normal start-up and stable operation of the engine.

lawnmower, does, start

Fuel problems

As with the difficult hot start option, problems in the fuel system can affect a cold start or failure. Carburetor adjustment, fuel filter and line contamination are all reasons that cause start-up difficulties.

Diagnose the fuel system, this is the first thing you need in case of difficult cold start.

It is worth paying attention to the quality of the fuel, because when using a mixture of gasoline and oil, in which there is a small amount of water, starting may be significantly difficult or impossible.

The mixture must be used sufficiently fresh, because when storing gasoline diluted with oil for more than a month, its properties are lost and it complicates starting, both on a cold and on a hot engine. For this reason, gasoline can burn poorly.

Why does a warm engine stall

Some motorists are faced with a situation when an already running and warmed-up engine suddenly stalls. over, this happens after the sensor has recorded a set of normal operating temperature. There may be several reasons for this. Next, we will consider them in more detail, and also indicate what needs to be done in this or that case.

  • Poor quality fuel. This situation is typical, for example, if you drive away from a gas station, and after a short period of time the engine starts to “cough”, the car jerks and stalls. The way out here is obvious. drain the low-quality fuel, purge the fuel system and replace the fuel filter. It is also advisable to replace the candles, but if they are new, you can do with blowing them. Naturally, you shouldn’t go to such a gas station in the future, and if you have saved the check, you can go there and make a claim about the quality of the fuel.
  • Fuel filter. If the engine stalls, you should also check the condition of the fuel filter. And if, according to the regulations, it is already supposed to replace it, then you need to do this, regardless of whether it is clogged up or not yet.
  • Air filter. The situation is similar here. The engine can become “swollen” with the rich mixture and stall shortly after starting. Check its condition and replace if necessary. By the way, this way you can also reduce fuel consumption.
  • Gasoline pump. If it does not work at full capacity, then the engine will receive less fuel, and accordingly, after a while it will stall.
  • Generator. If it is completely or partially out of order, then it stopped charging the battery. The driver may not immediately notice this fact, start the engine and drive. However, it will only drive until the battery is completely discharged. Unfortunately, it will not be possible to start the engine again. In some cases, you can try to tighten the alternator belt. If this procedure did not help, you need to call a tow truck or call your friends so that your car can be dragged to the garage or service station.

Try to monitor the normal state of the above nodes and mechanisms. Even minor breakdowns, if not eliminated in time, can develop into big problems that will turn out to be expensive and difficult repairs for you.

Top 3 Reasons for Poor Hot Startup

So, according to statistics, the main reasons for poor engine start after idle at high temperatures are:

  • Enriched fuel mixture, which is formed due to low-quality gasoline (its light fractions evaporate, and a kind of “gasoline fog” is obtained).
  • Defective coolant sensor. At high ambient temperatures, it is likely to malfunction.
  • Defective ignition. It may be incorrectly set or there are problems with the ignition switch.

We will also give you a table where we tried to visually show which components can cause problems, and what needs to be checked in engines of different types.

Types of engines and their typical causes Carburetor Injection Diesel
Low-quality fuel, evaporation of its light fractions
Defective coolant sensor
Crankshaft position sensor
Mass air flow sensor
Fuel injectors
Fuel pump
High pressure fuel pump
Idle speed regulator
Fuel pressure control
Diesel idle system
Ignition module

When does not start on a hot carburetor engine

Why is it bad to start hot and what to do

The reasons why the carburetor does not start well on a hot one are more or less clear, the volatility of gasoline is mainly to blame. The bottom line is that when the engine warms up to operating temperature, the carburetor also heats up, and after turning off, within 10-15 minutes, the fuel begins to evaporate, so it is difficult to start the car.

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Pressing the gas pedal to the floor and purging the fuel system will help to start a hot engine in such a situation, but no longer than 10-15 seconds, since the fuel can fill the candles. If the question concerns “Zhiguli”, then the fuel pump may also be to blame, since “Zhiguli” gasoline pumps do not like heat very much and sometimes refuse to work at all when overheated.

When it starts badly on a hot diesel engine

Unfortunately, diesel engines can sometimes fail to start hot. The most common causes of this phenomenon are malfunctions of the following nodes:

  • Coolant sensor. The situation here is similar to that described in the previous section. The sensor may fail and, accordingly, transmit incorrect information to the ECU.
  • Crankshaft position sensor. The situation is similar to an injection engine.
  • Mass air flow sensor. Likewise.
  • High pressure fuel pump. In particular, this can happen due to significant wear of the bushings and the oil seal of the pump drive shaft. Air enters the pump from under the stuffing box, which makes it impossible to gain operating pressure in the sub-plunger chamber.
  • Diesel engine idle system.
  • Fuel pressure control.
  • Ignition module.

Now we will try to summarize the information provided so that it would be easier for you to find the cause of the breakdown if it happened to your car.

plunger pair of injection pump

When the injection engine does not start

Since an injection engine is somewhat more complicated than a carburetor engine, there will be more reasons why such a motor will not start. In particular, they can be malfunctions of the following components and mechanisms:

  • Coolant temperature sensor (coolant). In hot weather, it can fail and give incorrect information to the ECU, in particular, that the coolant temperature is above normal.
  • Crankshaft position sensor (DPKV). Its failure will lead to incorrect operation of the ECU, which in turn will prevent the engine from starting.
  • Mass air flow sensor (DMRV). In hot weather, the sensor may not cope with the tasks assigned to it, since the temperature difference between the incoming and outgoing air masses will be insignificant. In addition, there is always the possibility of its partial or complete failure.
  • Fuel injectors. Here the situation is similar with a carburetor engine. The fine fraction of gasoline evaporates at high temperatures, forming a rich fuel mixture. Accordingly, the engine cannot start normally.
  • Fuel pump. In particular, it is necessary to check the operation of its check valve.
  • Idle speed regulator (IAC).
  • Fuel pressure control.
  • Ignition module.

Next, let’s move on to considering the possible causes of a bad hot start in cars with diesel engines.

Poor hot start

With the arrival of hot days, more and more drivers are faced with the problem of a poor engine start on a hot one, after a few minutes of parking. over, this is a problem not only of carburetor engines. a situation when it does not start up hot can await both the owners of cars with an injection engine and diesel cars. Only the reasons are different for everyone. Here we will try to collect them and identify the most common.

The first thing to do in order for the engine to start up normally on hot is to refuel at proven gas stations, as well as monitor the state of the fuel system of your car. If the engine does not start after even a short standstill in the heat, first of all open the throttle valve (press the accelerator pedal) or remove the filter cover and leave it open for a couple of minutes. During this time, the evaporated gasoline will evaporate and you will be able to start the engine normally. If such a procedure did not help, then it is necessary to perform troubleshooting among the components and mechanisms described above.

Specificity

That diesel, like petrol, converts reciprocating piston movements into mechanical work is self-evident. To better understand the reasons for a bad start, let’s talk about the specifics of the Diesel cycle.

In motors of this type, there is no coil, distributor, GDP and spark plugs as such. He does not need them, since the fuel mixture self-ignites in the combustion chambers. Air entering the combustion chamber is compressed by the piston. As a result, a significant increase in temperature occurs in the combustion chamber. It is the high temperature of the fuel-air mixture that causes the diesel to ignite spontaneously. In cold weather, to facilitate heating of the air in the combustion chamber, all internal combustion engines are equipped with glow plugs.

How to check

  • The candle must be unscrewed from the well;
  • connect it directly from the battery (ground to the candle body, plus to the bus connection point) and watch it warms up. A serviceable candle necessarily heats up from the edge, evenly changing color from heating.

Only such a system will ensure a proper start-up in frost. Only the tip of the candle is in the combustion chamber. Therefore, a candle that, when checked, shows resistance, may heat up off the base and cause a bad start in winter.

All candles should be heated at approximately the same rate. If the engine does not start well after cooling down, and after starting it smokes for a few seconds and is unstable, you can safely start diagnostics with spark plugs.

It is also worth checking the relay. Possibly oxidation of the contacts is not able to transfer sufficient current to warm up. Be aware of the possibility of a blown fuse or tire damage. The warm-up time before starting depends on the coolant temperature. In extreme cases, the reasons for the incorrect operation of the system may be hidden in the corresponding sensor.

Fuel

Domestic fuel at many filling stations wishes better. Especially in cold weather, when the waxing of fuel leads to immobilization of diesel engines. For your own good, there will be a request to the employees of the gas station to present a quality passport for fuel. If, after refueling at an unchecked gas station, the engine is difficult to start, it stalls, smokes or works unstably. most likely the problem is in the fuel. Only after self-checking, you can be sure not only that the engine will start after spending the night and will not freeze when driving along the highway in severe frost.

Reasons for poor diesel start

Despite the fact that the obvious advantages made diesel engines quite popular, cars with the “heart” of the Diesel cycle remain a rather specific technique. Therefore, it will be useful for every owner of a car running on diesel fuel to find out the malfunctions in which a diesel engine does not start well.

Consider the reasons for which a diesel engine will start poorly:

  • frosty morning;
  • after a long stay;
  • hot, when the internal combustion engine is warmed up;
  • the starter turns, does not grab or starts up, but then immediately stalls.

Mechanics

Coking of the piston rings

One of the reasons for a poor cold start can be the natural wear of the cylinder-piston group:

  • working out in cylinders, ellipticity;
  • bedding, wear of compression rings;
  • combustion chamber leaks and many others.

In winter or after being idle in cold weather, a “tired” engine with similar problems will be especially difficult to start. Even a good battery and a good starter will not guarantee a good start in frosty morning. If the internal combustion engine smokes before warming up, does not develop any traction, works unstably or even stalls, and after the hot symptoms disappear, pay special attention to the “compression” item. Please note that a hot worn-out diesel engine will start without problems.

Since the usual measurement with a compressometer is influenced by many related factors (the same starter), it is better to check the condition of the cylinder-piston group with a pneumotester. A leak test will give the most accurate information about the condition of the internal combustion engine.

Air

The diesel engine cannot function normally if there is air in the fuel line. Air pressure drops in the fuel line after a standstill. Before starting the internal combustion engine, the starter will turn, building up the pressure in the line. The main symptom of such a malfunction will be difficult start-up after downtime. Subsequent starts and general engine operation may not undergo any changes.

The manual fuel pumping bulb will greatly facilitate the release of the system.

  • a small transparent tube must be cut into the low pressure fuel line (preferably in front of the high pressure fuel pump). This will detect air bubbles;
  • pump about 2 atm of pressure into the tank with a compressor. All places of damage to the hose, suction at the seals will begin to “sweat”.
  • watch the exhaust while starting. If the engine does not start, but at least smokes (black smoke is the remains of unburned fuel), the problem is most likely not in the airing of the system.
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The most common causes of air leaks include damage to the fuel line hoses (supply and return), loss of elasticity of rubber bands, rings, oil seals (for example, a fuel filter, drive shaft or injection pump cover). The last problem is most typical in frost, when rubber products are deformed under the influence of temperature.

If a diesel engine starts up after a standstill, but stalls after a while, the reason may also be hidden in the air. It’s just that the design of the injection pump provides a small residue of diesel fuel, even if all the fuel from the return flow ran back into the tank.

If the engine stalls after abruptly pressing the pedal, and then immediately resetting the gas, 99% of the problem is suction.

Glow plugs

If the engine does not start well in cold weather, especially in winter in frost, but does not stall further, the first step is to check the glow plugs and the preheating system as a whole. Starting from 5, even a generally serviceable diesel engine with an inoperative air heating system in the combustion chamber will start poorly. The system includes:

  • glow plugs;
  • heating relay;
  • a bus that connects all candles into a single chain.

The test should start with the glow plugs. I can assure you that the popular multimeter test method is a largely ineffective test. It is designed to detect a rupture of the heating element (in this case, there will be no resistance). All candles can have resistance, but the reason for a poor start in cold winter will be in them. At high temperatures overboard or on a hot serviceable diesel engine, you can start without any glow plugs.

In severe frost, the purpose of the preheating system is not only to facilitate starting, but also to help in the first seconds of warming up. After the “spiral” on the dashboard has faded, the candles continue to work for some time. If you, albeit off-air, managed to start the internal combustion engine on a frosty morning, but the engine continues to work unstable for some time, be sure to pay attention to the diagnosis of glow plugs.

What to do if your petrol lawnmower won’t start

The main thing in using any garden equipment (and equipment in general) is compliance with all operational requirements, as well as timely maintenance. Only under these conditions will the petrol lawn mower work properly and for a long time. However, unforeseen situations do happen, and one “fine” day, the device may stop starting. Today we will find out why this is happening and how you can fix this kind of problem.

Common breakdowns and how to fix them yourself

If the mower does not want to start, then first of all check if there is any gasoline in it. If not, top up to the required level. The fact is that if the device is idle for a long time, the gasoline is “exhausted” from it, therefore, it must be drained and replaced with a new one. Do this carefully so that fuel does not get on the engine (otherwise it may ignite).

Note! If you do not know which gasoline should be used specifically for your lawn mower model, find the relevant information in the technical data sheet.

By the way, if you are just planning to buy a gasoline lawn mower or any other garden equipment, we recommend that you visit the site gardenmoto.ru. There you will find the widest range of products at very reasonable prices. But back to the reluctance of the device to start.

So, the next reason why a similar problem may arise is the incorrect position of the air damper when making the first start. Based on the air temperature, this damper either closes completely or rises to the middle position (if the temperature is 30 degrees). After that, it should be opened entirely.

We also recommend inspecting the air filter to see if it is dirty. To do this, turn on the mower and disconnect the cable from the spark plug. Remove the cover, remove the filter, wash it with gasoline and dry it thoroughly (or, alternatively, put a new one).

Note! The air filter should be replaced on average every 25 hours of use. Remember this!

Finally, the last reason is a faulty candle (by the way, it may just be filled with gasoline). To find out, unscrew it, clean it and check for a spark. Next, close the choke and try to start the engine. If this does not work, you better trust an experienced professional.

As a result, we also recommend that you regularly study the lower part of the mower, since damage on it can be the reason that the engine will not start. That’s all, good luck!

What to do if your petrol lawnmower won’t start?

The most important point when using any equipment is to comply with the basic rules of operation and its timely maintenance. This approach will ensure that your petrol lawn mower works properly and for a long time. But nevertheless, sometimes unforeseen situations happen, and for some reason the device does not want to start. In our article we will tell you about the possible causes and ways to fix this problem.

Faults that you can fix yourself

When your petrol lawnmower won’t start. first of all, it is necessary to check the presence of fuel in the tank. If it is missing. top up to the desired level. Often, when the device is not used for a long time, gasoline “runs out”, so it must be completely drained and refilled with new. This procedure must be done carefully so that fuel does not get on the engine, as this can lead to further ignition (when the engine heats up). Which gasoline is better to use, you can find out from the technical passport of the device.

In order for the unit to start, you need to pump fuel with a primer (if available in this model) into the carburetor and set the maximum speed. You need to start the technique carefully. The starter cord must be smoothly pulled out until it stops, then pull it towards you with one even sharp movement.

A problem can occur if the air damper is not correctly positioned during the first start. Depending on the air temperature, it is completely closed or set to the middle position (above 30 C). Then it must be fully opened.

Check the air filter for dirt. To do this, turn off the machine and disconnect the wire from the spark plug. Unscrew the cover and remove the filter. Rinse it with gasoline and dry it thoroughly, or simply replace it with a new one. Remember that it is recommended to change the air filter after every 25 hours of operation.

Another reason your petrol lawnmower won’t start could be a faulty spark plug. Perhaps she was just flooded with fuel. In this case, unscrew it, clean it and check for a spark. It may not be present when the spark plug is filled with fuel. Place choke control handle (if equipped) in the CLOSED position and start the engine. If this does not help, it is better to seek help from a specialist.

Try to constantly inspect the bottom of the machine, as any damage to it may cause the engine to stall.

If your petrol lawn mower started up normally but stopped working almost immediately, it is likely that the crankshaft or piston is stuck. Another reason may be an insufficient amount of oil in the crankcase. We recommend that you manually move these parts and check the oil level with a special dipstick, you may be able to correct this problem.

However, remember that the replacement and repair of all faulty components and elements should be entrusted to professionals from authorized service centers. Never do it yourself.

If you want to talk to a specialist and get advice on the issue that has arisen, call us by phone: 7 (495) 135-29-39 every day from 10.00 to 20.00. We will provide all the information you need.