Trimmer Doesn’t Start Hot

The trimmer, both electric and with an internal combustion engine (ICE), is an indispensable tool in the summer and autumn for owners of cottages and private houses.

With its help weeds, small bushes are easily removed and the lawn is trimmed. But, like any technique, trimmers fail at the most inopportune moment.

To fix the malfunction with your own hands, the user of this technique must first determine the cause of their occurrence.

The main malfunctions of gasoline and electric trimmers

With lawn mowers and an electric trimmer, if you do not consider breakdowns associated with the boom and mowing head, faults mainly occur in the engine area.

Damage to gas trimmers

Typical breakdowns of the gas trimmer, which are most often encountered by the owners of this unit, are as follows:

  • Engine breakdown;
  • Problems with the carburetor;
  • Fuel supply problems;
  • Muffler malfunction;
  • Gearbox breakdown;
  • The starter is broken;
  • Problems with the air filter;
  • Clogged breather on a gas tank.

Trimmer Doesnt Start Hot

Faulty electrical trimmers

Since the device of the electric mower is much simpler than the mototrimmer, there are few reasons for its failure.

It should be noted that the elimination of some of them is better to entrust to a specialist.

Basically, the trimmer stops working normally in the following cases:

  • Malfunction of an electric cable;
  • Faulty control button;
  • Burned-out motor stator winding;
  • Open contact on the engine.

Why doesn’t the gas trimmer start

The reasons why the gas trimmer stopped turning on may be different, therefore, a phased diagnosis of the device is required.

Fuel tank (fuel quality)

Remember that always before starting the unit a check is required on the availability and quality of fuel. In this case, do not be greedy and save money, as well as “be smart” about the amount of added oil. Everything must be done according to the manual attached to the device, since when the piston group fails, its replacement will cost about 70% of the total cost of the trimmer.

Fill fuel with the expectation that you will completely use it up when doing work. The gasoline remaining in the tank loses its properties after a while and can harm the engine. Therefore, do not prepare the mixture for future use and in large quantities. If the lawn mowing does not start well, try to drain the “old” fuel from the tank, and fill it with a freshly prepared mixture.

Important! Filling the device with fuel whose origin is unknown is fraught with negative consequences. Gasoline must be of high quality, purchased at a gas station, and its brand must not be lower than AI-95.

Candle and candle channel

So, you changed the fuel, but nothing has changed, and the trimmer still does not start. In this case, it is worth checking the candle channel: does it throw it with a combustible mixture.

Often users put the choke in the “OFF” position at start-up, and when the engine starts, do not put it in the “ON” position, after which it stalls.

Further, an attempt to re-start the ICE leads to the fact that gasoline fills the candle, and the start becomes impossible. To diagnose and resolve a possible problem in this node, do the following:

  1. It is necessary to unscrew the spark plug, wipe it well and dry it. When installing the spark plug in the engine cylinder, it should be dry.
  2. Drain the accumulated fuel from the combustion chamber. This is done through the hole from which you unscrewed the candle.
  3. If there is carbon deposits on the electrodes of the candle, it must be removed either with a thin file or a nail file.
  4. Do not forget to set the gap between its electrodes before replacing the part. The clearance on the candle should be 1 mm. As a probe to check the gap, you can use a coin.
  5. Next, assemble the unit, read the start instructions and try to start the engine again.

If the engine does not start, then you will need to check the spark. For this:

  • Unscrew the candle;
  • Put a cap on the high-voltage wire on it;
  • Touch the metal part of it to the cylinder body (to ensure contact, you can insert a pipe wrench) as shown in the figure below;
  • Pull on the start cord so that a few revolutions of the engine occur.

Normally, at each stroke of the piston, a spark should slip between the electrode electrodes. If there is a spark, then the reason that the engine does not start should be sought in other nodes of the device.

To better understand the process of how to test a candle for a spark, you can use this, where the test is shown on the example of the Soyuz lawn mowers.

If there is no spark, then first check the cable connecting the candle to the coil. Perhaps the reason is in it. You can call it using the tester. If an open circuit is detected, a high-voltage wire will need to be replaced.

Also, the cause that the spark disappeared may be a malfunction of the ignition coil (magneto). The figure below shows what the coil (magneto) looks like from the Patriot (Patriot) petrol trimmer.

To eliminate the malfunction, you will need to use a tester to check the magneto trimmer, namely, its primary and secondary windings. On the primary winding, the resistance should be in the range of 0.4 to 2.0 ohms.

If the device shows 0, it means that a short circuit has occurred in the winding, and if infinity is a clear sign of an open circuit. The resistance on the secondary winding should be in the range of 6 to 8 kOhm.

On some coils, it can reach 15 kOhm.

Air filter

If your lawn mower does not start well or dies immediately after starting, you should pay attention to the air filter, as it may be clogged, as a result of which air does not enter the combustion chamber and ignition of the fuel does not occur.

To check if the filter is in the case, remove it and try to start the engine. If he earned, then the reason is found. The filter needs to be replaced or rinsed well and dried before installation.

In the event that you find oil in the air filter, it must be washed with gasoline, squeezed well and dried for at least 2 hours before installing in place.

If the unit still does not start when the air filter is removed, it is recommended to check the fuel filter.

Fuel filter

This filter cleans the fuel of possible contaminants. If it is clogged, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the intake hose, which is located inside the fuel tank. To get to the filter, you need to remove the plug with the tubes coming out of it.

When removing the plug, the intake hose may disconnect and remain in the tank. It is removed with tweezers.

Next, remove the old fuel filter from the hose and put on it a new one, purchased in advance. You can also clean the fuel filter if you do not have a new one. The filter must be secured to the hose with a spring clip.

Install the intake pipe into the cork and insert the latter into the tank.

It should be noted that in some trimmer models the intake hose is not located on the cork, but inside the tank. You can remove it with tweezers or a hook bent from a wire.


Breather is a check valve, which is designed to equalize the pressure in the gas tank.

If it is clogged and does not allow air to flow towards the tank, then a vacuum forms inside the fuel tank and the fuel stops entering the carburetor.

To check the serviceability of the valve, remove the hose that goes from the tank to the carburetor. If gas does not flow from the tank, then the breather is clogged.

Users of trimmers often wonder: where is the breather? This valve is usually located in the gas tank cap and looks like the following figure.

Cleaning the breather is very simple: disassemble the valve and flush all its components. In some lawn mowers, this valve may be located directly on the fuel tank. You won’t be able to find it right away, since it is hidden from view under the starter housing. Such a breather is cleaned with a regular needle.

Exhaust channel

The reason that the trimmer has significantly lost power, and when trying to increase the engine speed, it picks them up slowly, is often a clogging of the exhaust channel through which exhaust gases exit the combustion chamber.

It is necessary to remove the muffler so that no burner gets inside the cylinder. Next, clean the exhaust channel of carbon deposits.

This must be done very carefully, preventing carbon deposits from entering the combustion chamber.

After this procedure, the weak power of the unit and the slow set of rotation speed of the mowing head will no longer upset you.

Insufficient compression

If the compression is insufficient, then starting the engine, in most cases, will fail. To check the compression, you can use a car compressor.

  1. Unscrew the candle from the engine cylinder.
  2. Screw the compressometer into its place.
  3. Start yanking the starter cord the way you do when you start lawn mowing. Do this until the arrow on the measuring device stops moving in the direction of increase. This value will also show the compression force of this engine.

What compression should be? Normally, the compression should be at least 8 kg / cm2. Although even at 8 kg / cm2, some engines do not have idle and stall, since the fuel is not adequately pumped. If your lawn mower does not swing above 8 kg / cm2, you will have to check the cylinder, piston and rings.

Also, poor compression can be due to a loosely screwed carburetor. Check if he is staggering. If so, tighten the fasteners that hold it in place. Also, if the carburetor is poorly bolted, you will notice that gasoline is dripping during operation.

Electric trimmer vibrates

Many users of mowers noticed that some time after the device started to work, it begins to vibrate violently.

On some trimmers, mainly in more expensive models, an anti-vibration system is installed in the form of shock absorbers located between the engine and the bar. But in some cases even she does not save from strong vibration.

The reason that a strong vibration appears in the trimmer may be a small amount or a complete lack of lubrication on a rigid or flexible shaft located inside the apparatus rod.

Replacing the grease on the hard shaft is as follows:

  • Unscrew the gearbox located at the bottom of the bar;
  • After removing the gearbox, you will see the end of the shaft, for which you must pull to remove the part;
  • After removing the shaft, it is necessary to grease it with plenty of special lubricant “CV joint-4” or regular. “Litol-24”;
  • Apply a small amount of grease to the shaft and evenly lubricate it along the entire length of the part, including the splines at the ends of the rod (if they work together, the shaft will have to be replaced);
  • After lubrication, reinsert the shaft into the rod and put the gearbox back in place.

Lubricate the flexible shaft as follows:

  • Unscrew and remove the mowing head;
  • Remove the rod from the electric motor by unscrewing a pair of bolts;
  • Pull the flexible cable out of the bar;
  • Grease the cable with the entire length.

This is done as follows: first you need to lubricate the end of the cable, and then insert it into the rod, after which, as it moves inside the pipe, lubricate the part and distribute it evenly on the surface. Then insert the shaft with the flexible shaft into the electric motor and secure it.

In case the grease did not help, and the vibration continues to appear, it will be necessary to change the flexible shaft.

The trimmer is very hot

Trimmer overheating can occur for many reasons:

  • Gasoline does not have the octane rating indicated in the instructions for the unit;
  • The proportions of gasoline and oil were not observed during the preparation of the fuel mixture;
  • A mixture of fuel with oil was prepared long ago (the mixture cannot be stored for more than 2 weeks);
  • The trimmer works beyond the prescribed time;
  • A low-power trimmer is used on thick and hard grass, the device works with overload and quickly heats up;
  • Shifted towards the bar or the cassette lid stuck.

The latter happens if you install a mowing head that is not suitable for this unit, or when the axis moves inside the boom. These changes make rotation difficult, the load on the engine increases, and it overheats.

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Gas Trimmer Does Not Start For Hot Causes

How not to get confused if the lawn mowing does not start

The tool, despite its small dimensions, is a complex technical device. If you study the operating manual, it turns out causes, why not start up lawn mowers are known and disposable. It is necessary to exclude the causes that impede the start of the tool, one at a time. Usually start with more accessible nodes with easy health checks.


All causes, why not start up lawn mowing, can be systematized according to the specifics of the operation of individual nodes. In the service center, the malfunctions are systematized:

  • Motor malfunction (piston wear, bearing malfunction, crankcase crack);
  • Fuel consistency failure. Clogged pores air filter either carburetor malfunction;
  • The ignition system does not work;
  • Mechanical failure. Leaking hoses, broken wires under the braid, rupture of tubes.

Lawn mowing cannot work for a long time. The gearbox and engine will overheat. Mowing can be less than 15 = 20 minutes, making a five-minute break. On hot noon, the operating time is halved. When mowing weeds, sedge, the working time is required to be reduced.

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

  • Check fuel quality;
  • Make sure the candle is working and the candle channel is clean;
  • Check cleanliness air filter;
  • Make sure the fuel filter is not clogged;
  • Check the purity of the breather;
  • Clean the exhaust duct.

Complex causes will be found in the diagnosis of malfunctions, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear on the gasket and violation of the tightness of the internal halls with a loss of vacuum. Do it yourself repair of the lawn mowers, if it does not start, will require patience.

Elimination of the reasons why the lawn mowing does not start

The fuel mixture must be prepared with exact proportions of gasoline and oil. In this case, you can not use a different brand of fuel. To prevent the ingress of dirt, gasoline should be left in a glass or metal dish for 2 days. Do not use plastic containers to store fuel. It is necessary to exclude the reasons one by one, the lawn mowing does not start on a hot gas trimmer. Measure the oil accurately with a medical syringe without a needle. Use only freshly prepared mixture without leaving undeveloped fuel in the tank. If the engine is naughty, the lawn mower stalls, when you press the gas, fuel may be to blame.

Lawn mowing. On the hot stalls. Possible cause and remedy

I immediately draw your attention to the fact that unfortunately it is not carburetor. (My Facebook site.

Chainsaw does not start on hot

Does not start chainsaw on hot.

Lawn mowing does not start on hot. Pull the trigger and sharply pull the cord several times until the engine starts, then lower the trigger. Does not start. Requires specialized repair.

Checking the ignition system, if not lawn mowing, carried out sequentially:

  • Remove the removed candle from soot and dirt, dry it, set a gap of 1 mm;
  • Connect to the high-voltage wire and check for a spark by pulling the starter several times;
  • If there is no spark, check the integrity of the high-voltage wire;
  • Replace the candle;
  • Dry the candle channel;
  • At the same time, the operation of the ignition coil is checked, it is faulty if the working candle does not spark.

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

Cleaning or replacing the air and fuel filters will ensure the necessary flow of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If a nylon fabric is used, it is washed, the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the suction pipe open. Do I need a replacement air filter, can be determined if the engine with the air cleaner removed is started. Do I need to change the grid on the fuel supply, if the lawn mowing does not start, a dry candle will tell.

Breather, air inlet for gas tank. Lawn mowing does not start or Causes of malfunction of the lawn mowing does not start on hot. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be purged with air or cleaned with a needle. Clean the exhaust channel, remove the spark silencer mesh.

Carburettor Adjustment

  1. The chainsaw should work for at least 10 minutes, since the adjustment is carried out hot.
  2. Turn screw N smoothly to maximum speed, then turn it by ΒΌ, counterclockwise, reducing the speed of rotation of the motor shaft.
  3. Idling is regulated by screw T, ensuring that the braid does not rotate.
  4. The screw L is adjusted, first opening the throttle as much as possible, and then gradually reducing the speed to a stable minimum.

After adjustment, a working carburetor with cleaned filters, checked by ignition should ensure the operation of the engine. In the event of a carburetor malfunction, after its repair, the feed system will need to be adjusted again before starting the lawn mowing.

  • Rewind spring malfunction;
  • A broken or stuck starter pulley;
  • Faulty starter assembly.

The most important malfunction, the elimination of which is associated with the replacement of the engine, may be the failure of the piston group of the engine. The cost of repair will cost about 70% of the cost of the product. That the trimmer does not start on hot and even cold. That the trimmer does not start well. Understand the reasons why not lawn mowing, will help:

Proper chainsaw care

In the instruction manual there are no unnecessary phrases, everything that is offered is aimed at trouble-free operation of the lawn mowers. The cleaning of all parts after each cycle of work facilitates the easy removal of uncured residues and dirt. Only the cooled nodes need to be cleaned. This technique contributes to the quality of air cooling of the engine and gearbox.

When preserving equipment for the winter, carry out an audit, lubricate the gearbox and piston system, wrap the entire saw in an oily rag and store in a dry place.

It is impossible, it is dangerous for the tool and the health of the mower, to use a metal cable instead of fishing line. It cuts more efficiently, but the load on the gearbox and motor increases. A worn piece of wire flies at a speed of a bullet.

Why the hot is bad If the engine starts poorly on Why the trimmer does not start. Effective mowing can lead to rapid wear of the engine piston group.

For greater mowing efficiency, it is proposed to use an asterisk fishing line profile.

Trimmer Doesn’t Start Hot

Let’s say you do not start the trimmer. In this case, you first need to check if there is enough fuel in the tank, and also evaluate the quality of the fuel consistency. Only use high-quality gasoline to refuel the motorized unit. It is recommended to use fuel whose brand is not lower than AI-95.

In the near future, the gas trimmer acquired the status of the 1st of the main tools in the arsenal of summer residents. And this is logical, because a motorized spit allows you to quickly put your personal plot in order.

But from time to time it happens that trimmer does not start on hot and even cool. In such situations, it is necessary to establish the cause of the malfunction without the help of others. Let’s find out what to do if not start trimmer.

The reasons that most often lead to such troubles will be discussed below.

Troubleshooting strategy

How to start troubleshooting if it does not start trimmer? In situations when the tool stalls immediately after start-up, it is worth inspecting the following units of the unit:

  • Fuel tank;
  • Spark plug;
  • Fuel and air filter;
  • Exhaust channel;
  • Breather.

It is the failure of the above locations that most often leads to the fact that the trimmer does not start well. Let’s look at how to eliminate such troubles.

Fuel mixture check

Let’s say you do not start the trimmer. In this case, the first thing is to check whether there is enough fuel in the tank, and also to assess the quality fuel mixture. It is necessary to refuel the motorized unit with exclusively high-quality gasoline.

It is recommended to use fuel whose brand is not lower than AI-95. Filling the trimmer with fuel of an unknown origin, purchased at a non-gas station, is fraught with the occurrence of frequent malfunctions in the tool. This may cause a malfunction of the cylinder-piston system.

Repair in this case often exceeds the cost of the device itself.

Why doesn’t the gas trimmer start? Incorrect preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual.

It is extremely not recommended to prepare the fuel mixture in large volumes, that is, for the future. After all, with long-term savings, the loss of the defining properties of the substance occurs.

Therefore, if the trimmer does not start, you should drain the old fuel and use a freshly prepared fuel mixture.

Diagnosis of the suppository canal

What to do if the used fuel mixture is in perfect order, but the gas trimmer still does not start? The reasons for the failure of the mechanism may lie in the excessive wetting of the candle channel. To diagnose and fix the problem, do the following:

  1. Unscrew the candle. Wipe it thoroughly and then dry it.
  2. Drain excess fuel in the chamber through the corresponding spark plug hole.
  3. Clean the old candle if there is soot on its surface. To cope with the task will allow the use of an ordinary lady’s nail file or needle file.
  4. When installing the element in place, set the gap to 1 mm. To check the parameter, just put any coin in the lumen.
  5. Reassemble the function block.
  6. Try to have a trimmer.

Chainsaw does not start on hot

Does not start chainsaw on hot.

The Chinese lawn mowing will not start. This is interesting.

Spare parts for Chinese lawn mowing Chinese lawn mowing will not start. It

Drying the candle channel is recommended for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage.

What to do if the function block was serviced in accordance with the above recommendations, but the trimmer does not start, is there a spark? In this case, it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It should only be slightly moistened.

You should resort to such actions to ensure ignition. After all, no matter how strong the spark is from a candle, there’s simply nothing to ignite in a completely dry chamber.

If even in this case the trimmer does not start, it is worth evaluating the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (in the presence of a reliable connection between these elements), most likely the problem is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of masters who will reinstall the site.

Filter Check

Another common reason why not start trimmer, is the presence of clogging in the filter area. To confirm the guess, it is enough to dismantle the indicated unit and try to start the unit without it.

If the trimmer engine starts, you will most likely have to replace the air filter or at least thoroughly purge the old one. In the presence of heavy pollution on a surface of the filtering element it is necessary to use a new grid.

When resorting to such actions, one should not leave the suction pipe completely without a filter. Indeed, the rush in this case may lead to the need to repair the entire piston group of the engine unit.

Cleaning the breather

Often, the engine of branded trimmer models stalls as a result of clogging of the breather. The main task of this component is to equalize the pressure in the fuel tank. In case of contamination of the unit, a vacuum forms here, which significantly complicates the supply of fuel. The problem can be rectified by cleaning the breather with a regular sewing needle.

Outlet Diagnostics

Stable operation of the trimmer may be impaired due to the accumulation of dirt in the exhaust channel or the formation of blockage on the silencer mesh. This problem most often occurs during the operation of older generation trimmer models. The issue is solved by dismantling the anti-spark mesh and cleaning it.

How to prevent sudden breakdowns during operation of the trimmer?

To ensure that the unit is always in a functional state, it is worth observing several simple rules:

  1. Conduct timely, regular technical inspection of the main mechanical components of the device.
  2. Refuel the trimmer with exclusively fresh fuel, the quality and origin of which is beyond doubt.
  3. Check after each use of the tool whether oxides and deposits have formed on the surface of the ignition system elements.
  4. Avoid heavy load trimmer during work.

In order for the unit to remain in working condition, it is necessary to properly prepare it for storage in the winter. First of all, you should completely disassemble the tool, and then flush and clean the components. It is also important to inspect the functional blocks for damage, if necessary, eliminating the deformation of parts, all kinds of distortions, gusts of materials.

Off-season gasoline trimmer storage recommendations

When placing the trimmer in storage, it is worth filling the gearbox with enough oil. Then you need to clean the air filter, partially disassemble, blow and rinse the engine of the unit. Having dried all the mechanisms, lubricate the movable elements. To process the piston system with oils, you must first remove the spark plug.

Then you need to move the piston to the extreme position, after which pour a small amount of oil into the spark plug hole and scroll the crankshaft. If stored gas trimmer in the offseason it is planned not in the house, it is recommended to tightly wrap the engine of the unit with an oiled rag.

This will avoid the development of corrosion on the surface of important components of the mechanism.


As you can see, there are a number of reasons why a gas trimmer may not start.

However, with a serious approach to the problem, the malfunctions indicated in the material are quite easily eliminated by one’s own hands. Seek help from specialists only in case of critical breakdowns.

In the end, you should always correlate the cost of self-repair with the for servicing the unit in the workshop.

Why the lawn mowing does not start. We troubleshoot

Caring for a personal plot, summer residents periodically encounter the fact that the lawn mowing does not start. There are many reasons for tool failure. For the correct diagnosis of the problem, the owner of the unit useful at the cottage needs to know the device and the principle of operation of its individual parts.

Since the gas trimmer is a complex device, you should carefully read the operating instructions before starting work. Very often they simply ignore her, or get to know her superficially.

As a result, when the tool stalls or refuses to start, the question arises. “Why doesn’t the lawn mow start?” A long seasonal break in work, improper storage and untimely maintenance of the trimmer will cause a lot of trouble to the summer resident, to eliminate the reasons.

Where to start diagnosing lawn mowers

If the lawn mowing does not start or immediately stalls after start-up, it is necessary to check all the main components and assemblies in sequence. The verification algorithm is as follows:

  • Fuel tank (fuel quality);
  • Candle and candle channel;
  • Air filter;
  • Fuel filter;
  • Breather;
  • Exhaust channel.

These nodes are most often the source of major problems that can be fixed after a thorough inspection.

Checking the fuel mixture

Before starting the engine of the gas spit, check the availability and quality of the fuel mixture. Do not save, do not be greedy and do not be clever in this matter.

Repair or replacement of the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). It is necessary to prepare the oil-fuel mixture strictly according to the instructions. Calculate its quantity from real needs.

Excess gasoline remaining after work over time loses its quality.

We diagnose a candle and a candle channel

If the quality of the fuel mixture is not in doubt, and the lawn mower stalls at start-up, then a filled candle may become the cause. Here, for repair, an ordinary candle key (probably every motorist has it) and a spare candle are suitable.

  • We twist the candle and wipe it;
  • Dry it thoroughly (do not calcine);
  • The excess fuel in the chamber is drained through the spark plug hole and dried;
  • We clear an old candle from a deposit by means of a file or a lady’s file;
  • We set a gap with a distance of 1 mm (you can check with any coin);
  • We return everything to its place and try to start a trimmer.

Dry the canal for at least 30-40 minutes. Otherwise, there is a risk of re-pouring a new candle.

If the candle is working, the nest where it is completely dry and the lawn mower does not want to start, we lubricate the threaded connection with gasoline. It should be slightly moistened. No matter how wonderful a spark a candle gives out, there is simply nothing to light up in a dry chamber.

If the trimmer motor still does not start, a cause such as the absence of a spark due to poor contact between the spark plugs and the high-voltage wire should be excluded. If the connection is high-quality, but there is still no spark, most likely, your ignition unit has “flown”. Here you can’t do without a master, because the part is not being repaired, but sold as a single unit.

Diagnostics of lawn mowing filters

Another reason that the gas braid stalls may be an air filter. To exclude it, try to remove the filter and start the trimmer without it. If possible, then you will have to change the air filter to a new one, or at least blow out and thoroughly clean the old one.

A gas trimmer may not start up due to contamination of the fuel filter. This is the next step in our algorithm. Here we check the condition of the filter element and, if necessary, replace it with a new one. When replacing, try not to leave the suction pipe completely without a filter, this is prohibited by any operating instructions. Haste can result in repair of the engine piston group.

Breather and exhaust channel

Often, “gentle” branded lawn mowers do not start and stall due to contamination of the breather. The main function of this element is to equalize the pressure in the gas tank. If this unit becomes clogged, a vacuum is created in the tank, which prevents the fuel supply. You can fix the problem by cleaning the breather. You can use a regular needle for cleaning.

Normal operation of the braids with internal combustion engines may be impaired due to the ingress of dirt into the exhaust channel or clogging of the silencer mesh. There is such a problem on older models. You can solve the problem by traditional cleaning and removal of the anti-spark mesh.

Complex causes of lawn mowing failure

If the step-by-step algorithm for troubleshooting does not give a result, and your braid still does not start or stalls, it is worth examining the carburetor and the engine itself. A clogged carburetor can be one of the reasons for unstable tool operation. Three main problems can be distinguished here:

  • Clogged channels or jets. All this is cleaned with special washes or purged with a powerful jet of compressed air from the compressor. Do not use needles and wire, as passage sections may be damaged;
  • Worn carburetor gasket. Exit. Replacement of a failed gasket;
  • Violation of tightness. To check this indicator, you can use an ordinary household tonometer, replacing a manometer with a suitable one. Keep track of the readings: if they do not change, everything is fine, and if the pressure starts to fall, then some part of the carburetor is faulty. We’ll have to find it and replace it with a new one.

If everything is in order with the carburetor, then the gas trimmer may not start due to wear on the piston group. If chips, scratches, or nicks are found on the piston or cylinder, they should be replaced.

Piston rings are subject to mandatory inspection. A slight piston loophole while rocking the connecting rod indicates that it is time to change the rings.

This procedure is best entrusted to service center specialists.

Rules for the operation and storage of lawn mowers

In order for the lawn mowing to continue well, you need to provide it with good storage and operating conditions:

  • During operation, carefully monitor the cooling system, carefully and timely clean the channels in the housing, as well as the fins of the starter;
  • If necessary, use solvents, kerosene and other detergents for cleaning;
  • Do not clean the tool “hot”. Let it cool;
  • Strictly follow the requirements of the instruction regarding the operating mode, otherwise you may overheat the engine;
  • If you do not plan to use the lawn mower in the next month, the fuel mixture must be drained from it, because over time it breaks up into heavy fractions that will uniquely clog the carburetor channels;
  • After draining the fuel, let the trimmer idle until it dies, this will help to completely remove the remains of the working mixture.

Before winter storage, follow these steps:

  • Completely disassemble the braid, rinse and clean all the details that you can;
  • Inspect the parts for damage, if necessary, eliminate distortions, gusts, bends and any other malfunctions;
  • Pour enough oil into the gearbox and clean the air filter;
  • You can partially disassemble the motor, flush, blow and grease all moving parts;
  • In order to lubricate the piston, you need to unscrew the candle, raise the piston to the dead center with the starter, pour a little oil into the spark plug hole and rotate the crankshaft a couple of times;
  • If you are not keeping the lawn mowing house, wind the engine with an oiled rag.

Remember, careful observance of the rules will allow you to forget that it is bad to start a lawn mow for several seasons.

Lawn Mower Poor Starts Hot

Hot engine is bad start up

There are situations when the car does not start, after it worked, after standing just a couple of minutes. With such a problem, drivers of completely different cars face.

Mostly this happens specifically on gasoline engines.

Regardless of what the engine is running on, carbureted or with an electric control unit, there is such a problem as the engine starts poorly on hot or does not start on hot at all.


So, if you have a carburetor engine, and he badly starts on a hot. Then you need to find what the problem is. There can be only two obstacles, and both of them are connected with fuel.

In the first case, obstacles can be with fuel. This often happens when the driver refuel at another gas station, which he had never refueled before.

The second reason is the carburetor, or rather its settings.

The main problem, why the carburetor engine does not start on a hot one, is that the engine has a huge temperature during operation relative to the carburetor.

When the engine is started and asks for fuel from the carburetor, then everything is fine, the fuel circulates and cools the carburetor and the engine. But when it is muffled after long-term work, the engine gives its heat to the carburetor, and it heats up.

At this moment, the gasoline that was pumped into the carburetor starts to evaporate, traffic jams from the air begin to form in the system, which prevent the car from starting up.

You should pay attention to the fact that if the car does not start on a hot engine, then do not try to do it. The fact is that the carburetor pumps fuel from the main tank and later, as the car cools down, there will be more fuel than necessary, and it will simply flood the candles. Then you have to not only wait until the carburetor cools down, but also clean or change the candles.

In order to avoid this obstruction, it is necessary to impoverish the fuel mixture without the help of others. This means that the fuel consistency will now have more air than gasoline. This can be done using the accelerator pedal.

In order to deplete the fuel mixture, press the accelerator pedal. Usually it is necessary to squeeze it out on one second, but on some engines the pedal needs to be squeezed out completely.

It must be emphasized that the accelerator pedal in your car needs to be pressed only once, when you press the accelerator pedal again, the fuel will flood the candles.

The third problem, due to which it can start up poorly on the hot, in the engine, where the carburetor is responsible for the fuel injection, is that the gas pump in the tank is malfunctioning or overheated.

The problem is that earlier gasoline pumps could not work at high temperatures, and during operation they often became unusable or simply turned off, which prevented the car from starting up. In this case, you just need to change the gas pump to a more modernized one.

In the near future, fuel feed pumps are already capable of operating virtually in all weather and without interruption. The cost of such pumps a little higher than a standard carburetor from a car manufacturer of the Volga.


Unfortunately, it happens that badly starts on a hot engine and such. In fact, in a car with such an engine circumstances may be even greater than in a carburetor engine. As you know, a car with an injection engine works completely in automatic mode. Therefore, here all the work is based on the readings of different sensors.

The first and main reason why this engine does not start when it is warm is the incorrect operation of the sensor, which indicates the temperature of the cooling water.

The fact is that when the sensor indicates an incorrect temperature, the electrical unit gives an incorrect command to nozzles that inject an unnecessary dose of fuel. It often happens that the sensor is just clogged, because of this, it does not indicate the correct temperature of the cooling water.

In this case, you just need to clean the sensor and install it back. If the sensor has become unusable, then it must be replaced with a new one.

Dde WYZ20H2 gas acid, does not start hot. That the trimmer does not start on a hot one and even that the lawn mower does not start well. Repairs

Lawn mower with the Ready Start system warming up categorically refused to start.

Lawn mowing. On the hot stalls. Possible cause and remedy

Immediately I draw your attention to the fact that this is not a carburetor to chagrin. (My Facebook website.

2nd reason why not start up the machine is that the fuel injectors are leaking.

In fact, everyone knows that the nozzle must supply fuel to the combustion chamber under pressure, but it will not be able to do this if the nozzle body is leaky. In this case, the mixture will be rich in fuel and poor in air.

Due to the fact that there is no air in the combustion chamber, the fuel will not be able to catch fire. In this case, it is necessary to inspect the nozzles in a special device.

If during the inspection it was found that the nozzles no longer became leakproof, then they must be immediately discarded and new ones installed. The problem is that even cleaning with ultrasound will not help to solve this.

A further prerequisite for the machine to not start is that the high pressure fuel pump is faulty. The problem here lies in the fuel pump high pressure. Husqvarna r 53 The lawnmower starts up poorly and “troits” on the hot start up better.

Checking this is not difficult, and even the most inexperienced driver can handle this. In order to check the operability of the plunger pair, you just need to pour cold water on the back of the high pressure fuel pump in order to cool it.

If after that the engine starts immediately, the drawback is only in the plunger pair.

In fact, when the engine that runs on diesel does not start, the drawback may not only be in the plunger pair. If the problem is on a diesel engine, then in addition to this check, you also need to check the oil seal of the drive shaft and the fuel pump bushings high pressure.

These were the main reasons why a warm car engine may not start. If all these manipulations did not help, then you should look further. But most often, drivers who are faced with this problem are helped by checking these particular key components.

One way or another, the problem here is precisely in the fuel system. In addition, the fact that the fuel may be unsuitable in order to correctly ignite should not be discarded.

The problem with fuel is described for a carburetor engine, but an engine that is controlled by an electronic control unit may not start for exactly the same reason.

Additional checks

So, if these methods did not help, then you should check the following nodes and devices. First of all, after the main check, you need to check the crankshaft position sensor.

He can give the wrong signals to the electronic control unit of the car, and he will no longer be able to give the correct command to the nozzles and other actuators, the engine of the machine will not start. Like any other sensor, this one may become clogged or become unusable.

The first step is to clean it, and if this does not help, then you need to replace it with a new one.

The second thing you need to see is a mass air flow sensor. It is just as important as the other sensors in this car system. The mass air flow sensor may be clogged or malfunctioning. It is best to clean the sensor so that it is visually close to a new one, this is very important in order to determine if the sensor is working.

The third thing to watch when the car does not start is the fuel wire pressure regulator. As the name implies, it regulates the pressure in the pipes through which the fuel flows in the nozzles.

The fourth explanation, due to which the warm engine of the car may not start, is that the idle speed control does not work. It is needed in order to ensure the correct operation of the engine during idle.

The fifth reason is high pressure wires. It is they who conduct the electric current to the candles, which ignite the fuel mixture in gasoline engines. You can identify a faulty high pressure wire visually. If on your wire high pressure If there are cuts, torn places and other damage, then such a wire is best replaced.

If damage is detected on one wire, then it is best to change all the wires at once. This should be done because most often the wires are installed at the same time, and if one of the wires becomes unusable, the others will also soon become unusable.

The last thing to watch is the ignition system. In order to find out that the ignition system is faulty, you need to understand the device of the car a little. If it was discovered that the malfunction is in this particular system, then it should be replaced immediately.


Often, drivers of supported cars face such a problem as it does not start at hot engine. This can happen even after it has just worked and warmed up to operating temperature. This can happen for several reasons, for each motor machines they have their own.

Does not start a lawn mowing or starts, but stalls. What is the reason? Agrotechservice

  • To understand this, you need to know the principle of operation of the unit as a whole. It happens that way, just bought, a new saw does not start, and running around the service centers begins, in such cases it is recommended:
  • Carefully read the instruction manual; to study in detail the method of first winding and running the lawn mowers; try to understand the principle of the product;
  • How is gas pumping and so on.
  • Causes of mowing lawn malfunctions:
  • The quality of gasoline is poor; the wrong proportion of gasoline and oil; clogging of the fine filter;
  • The spark disappeared.

Lawn mowing does not start after winter

In such cases, the unit must be serviced. Remove the fuel system, including filters (air, fuel), disassemble the carburetor, clean each unit, rinse. Blow out filters with air. Pay attention to the quality and octane rating of the fuel.

Please note that the products of such well-known companies as STIHL, Husgvarna and other brands will not work on cheap gasoline with a low octane rating.

For them, suitable fuel from the AI-92 brand and higher from automobile gas stations and then from well-established ones, since gas stations also have bad gasoline.

The use of high-octane and high-quality gasoline will determine how long the lawn mower will be used and how long it will last.

It is necessary to take into account one more fact that during long-term storage of the diluted fuel mixture, its working qualities fall, which also leads to consequences in which the lawn mowing does not start.

Therefore, it should be diluted portionwise, that is, the amount of the mixture that is produced at a time.The operating instructions clearly describe and explain the proportion of mixing gasoline and oil.

Strict observance of the correct proportions will at least save you a few questions why the lawn mowing does not start and what to do in such cases.

The lawn mowing starts and stalls. What to do?

1. There is a spark, and everything seems to be normal, but the lawn mowing does not start, in such cases, check the air access valve to the fuel tank. Clogging of the valve leads to a vacuum in the tank, at which the carburetor does not receive enough gas, so the lawn mower will start, but then stall.

To eliminate this reason, you need to clean the valve and try to start a lawn mow with a tank plug that is not fully twisted.2. If the lawn mowing does not start at the same time, the fuel filter should be removed and cleaned, as well as all carburetor parts should be checked, and then try to start.

The lawn mowing does not start again, the air filter is disconnected, try to start without it, if the lawn mower starts to mean the reason in the air filter, replace it.

The lawn mowing does not start, the spark disappeared

The disappearance of a spark entails checking the contacts and the correctness of the gap between them, the conductive wires to the candle and the candle itself.A way to check the spark is to unscrew the candle, connect the wire to it, put the candle sideways to the motor cover and pull the starter several times as if starting the lawn mowing, while you need to look at the angle and the contact of the candle, a spark should run between them.

If there is no spark, take a new candle to do the same procedure, if at the same time the spark is not traced, it means the problem is in the wire or contacts, it is better to replace them.

Lawn mowing does not start on a cold

When starting a cold motor, it is not recommended to press the gas. After tilting the lawn mow so that the air filter is on top, press the fuel suction button 5-6 times, set the function lever to the “start” position, pull the starter cord several times until the engine starts. After a few seconds of the motor, turn off the start system.

Lawn mowing doesn’t start on hot

If the lawn mower was recently in operation and has not yet had time to cool down but does not want to start, press the gas trigger, pull the starter cord sharply several times until the engine starts and only then release the gas trigger. If a lot of time has passed and the lawn mow has managed to cool, then it is necessary to start it as if it were cold.If the above methods did not help, the lawn mowing did not start, then it is worth contacting a service center.