The lawn mower does not start or starts but stalls. What is the reason?

A gasoline trimmer is a useful tool for clearing unwanted grass from surrounding areas and large lawns. The design of this equipment is quite complex, so if the device breaks down, there may be several reasons. The most likely factors leading to failure are usually described in the user manual. Knowing why the trimmer stalls, you can try to fix the defect yourself. The most common malfunctions that cause the lawn mower to stop, and the possibility of repairing them yourself are in the material below.

The trimmer stalls - how to fix the problem

A gasoline trimmer is a useful tool for clearing unwanted grass from surrounding areas and large lawns. The design of this equipment is quite complex, so if the device breaks down, there may be several reasons. The most likely factors leading to failure are usually described in the user manual. Knowing why the trimmer , you can try to fix the defect yourself. The most common malfunctions that cause the lawn mower to stop, and the possibility of repairing them yourself are in the material below.

If it stalls under load

Sometimes the trimmer stalls under load because it cannot gain momentum. This means that the cable tensioned in the carburetor is weakened and saggy. If you have experience in repairing this unit, the cable should be tightened.

Another reason for the malfunction is that the fuel intake hose is over-tensioned. When loaded, it stretches even more, resulting in cracks and ultimately deteriorating the part. To fix the damage, you will need to replace this element.

Trimmer gear lubrication

Lubrication of gears must be carried out regularly in accordance with the recommendations set out in the operating instructions for the model used. This should also be done if:

• new gears were installed;
• atypical sounds come from the gearbox when the trimmer is operating;
• The knives are difficult to rotate.

With constant use of the trimmer, its transmission mechanism experiences stress from grass, dirt adhering to the blades, or due to changes in torque. You need to choose a high-quality lubricant to extend the life of the gearbox.

Time and procedure for gearbox maintenance

I recommend that you carry out preventative maintenance on a new gasoline trimmer immediately after purchase, adding lubricant to the gearbox. Despite the high cost of gardening equipment, some manufacturers save money and add only the minimum amount of lubricant for the break-in period.

When you press the gas

If the lawn mower stops when you press the gas, the reasons may be the following.

• The most common option is a failure of carburetor adjustment, which occurs when there is significant load on the drive, after prolonged inactivity of the mechanism, or when it is used under difficult conditions.
• Clogging of the fuel valve, which can be eliminated by loosening it, as a result of which gasoline begins to flow normally through the system.
• Loosening and hanging of the cable located in the carburetor. The fuel hose may also stretch to the point of breaking due to significant load.
• The breather (check valve) is clogged, resulting in no fuel flowing into the tank.

If the problem is related to the carburetor unit, then it can be recognized by the appearance of vibrations from the lawn mower. When a hose bursts or a cable stretches, these components are replaced.

At idle

At idle, common reasons for the trimmer stopping are the following:

• contamination, misadjustment or incorrectly adjusted carburetor adjustment;
• air filter clogged;

Replacing the air filter of a brush cutter

Trimmer air filter

• reduction in gearbox speed when it heats up, which is a consequence of using an unsuitable fuel mixture;
• throttle valve clogged;

• air entering the system;
• There is not enough fuel to operate the trimmer.

If the problem area is the carburetor, then the equipment will stop both during a “cold” and “hot” start.

The lawn mower stalls when you press the gas

Hole in the fuel cap (breather) of the trimmer

If you have a similar problem, you should pay attention to the fuel valve, which, when clogged, stops flowing the fuel mixture normally. The solution to this problem is to loosen it using a suitable tool. In addition, the problem with the circulation of the fuel mixture may lie in contamination of the valve. To do this, just blow it out with a stream of compressed air.

If it stalls when opening the throttle

If the equipment operates properly at idle, but stalls when the air damper is opened, this indicates that air has entered the system through cracks in the fuel supply hose or damaged seals. To correct the breakdown and improve the operation of the tool without air leaks from the atmosphere, it is necessary to replace the damaged parts.

Another possible cause of failure is a malfunction of the carburetor dosing system. To fix this problem, it is better to contact professionals.

At high speeds

When the scythe stalls at high speeds, this is due to the following problems:

• clogged or stuck valve located on the gas tank cap;
• the carburetor has become misregulated due to vibrations that occur during operation of the mechanism;
• problems with the circulation of the fuel mixture;
• atmospheric air suction;
• the fuel intake hose is cracked or loosely connected.

The carburetor is adjusted based on the operating instructions for the trimmer. To adjust it, it is often enough to loosen the tightening of its housing. If there are problems with the circulation of the fuel mixture, then it can gradually enter the carburetor. After it is exhausted, the engine stalls at high speeds.

The trimmer stalls - how to fix the problem

A gasoline trimmer is a useful tool for clearing unwanted grass from surrounding areas and large lawns. The design of this equipment is quite complex, so if the device breaks down, there may be several reasons. The most likely factors leading to failure are usually described in the user manual. Knowing why the trimmer , you can try to fix the defect yourself. The most common malfunctions that cause the lawn mower to stop, and the possibility of repairing them yourself are in the material below.

READ Petrol Trimmer Brait 520 Video

If you stall after applying gas

Owners of petrol mowers often mention that the lawn mower stalls when you press the gas. Typically, such a breakdown occurs due to problems in the carburetor. Failure in its operation can occur due to prolonged storage, use in difficult conditions, or significant overload of the motor. A symptom of such a breakdown will be vibrating movements of the device during operation.

On a note! Users familiar with car carburetor repair can try to restore this important trimmer assembly on their own using the instruction manual. Otherwise, the right decision would be to seek help from service center representatives.

Sometimes the trimmer stalls when you give it gas because the fuel valve is clogged. This interferes with the flow of gasoline. To fix the problem, just loosen the valves. This will restore normal fuel supply to the carburetor.

Another possible reason why a lawn mower stalls when gas is supplied is contamination of the breather (check valve). This part prevents a vacuum from forming in the gas tank. If it is clogged, air does not flow, which means fuel does not flow to the carburetor. To fix the problem, you need to clean this element.

Types of gearboxes for trimmers

It is worth noting that the basic components of cylindrical mechanisms are gear cylinders. Most trimmers are equipped with worm gears, but much depends on the manufacturer’s decision and other features.

A feature of the planetary type of gears is the coaxial arrangement of the shafts, while conical objects have an intersecting arrangement. Gear transmission is relevant only for those units that are used in certain temperature conditions. Moreover, for them any mechanical damage can be fatal.

READ Husqvarna 137 Chainsaw Starts and Stalls

Preventive measures and operating rules

In order for the lawn mower to work properly and not stall when starting, it must be stored and operated correctly. Following these simple recommendations will help you forget about problems.

• When cutting grass, you need to monitor the condition of the cooling system. It is also necessary to regularly clean the channels in the housing and the starter fins.
• To clean the instrument, use kerosene, thinner or other cleaning products.
• Do not clean a hot instrument; it must cool down before washing.
• It is important to follow the recommended operating mode to avoid engine overheating.
• If the scythe is not used within the next thirty days, the fuel must be drained, otherwise it will break down into heavy components that can clog the carburetor passages.
• After the fuel has been drained, the trimmer should idle for a while until it turns off. This will completely get rid of the working mixture remaining inside.

Why does the lawn mower stall? petrol trimmer | when you press the gas? WE SOLVE THIS PROBLEM /Al-ko frs 4125

To store the instrument in cold weather, you must:

• drain the fuel completely;
• disassemble the lawn mower, wash and clean all accessible components;
• inspect the condition of the parts, eliminate all defects that can be corrected;
• pour the required amount of oil into the gearbox;
• clean the air filter;
• perform partial disassembly of the engine, wash, blow and thoroughly lubricate all moving parts;
• To lubricate the piston, unscrew the spark plug, then use the starter to raise the piston to top dead center, pour a small amount of oil into the spark plug hole and turn the crankshaft several times.

Important! If it is not possible to store the trimmer in a warm, dry room, you must first wrap the motor with an oily rag.

Only by following these rules can you be sure that the lawn mower will work properly and will not stall over a number of seasons.

As you can see, the trimmer stops working for many reasons. Most of them can be fixed yourself using the user manual. In cases where there is no confidence in one’s own abilities, it is recommended to take the equipment for repair. It is worth remembering that incorrect actions can cause even more harm to the trimmer. As a result, repairing a lawn mower will cost significantly more than it would have initially, and in the worst case, you may need to purchase a new unit.

If it stalls when warming up

The lawn mower often stalls when it gets hot. It looks like this - the tool starts up, works “jerkily” (not smoothly) and quickly stalls. This situation occurs due to boiling of fuel in the carburetor or an incorrectly selected damper, which should not be a disk, but a rotary one. In the latter case, if an error is detected, the part must be replaced.

The cause of the trimmer heating may be damaged ignition circuit wiring or a faulty coil. A broken unit will need to be replaced with a new one.

Design and principle of operation of a trimmer gearbox

A gearbox is a device for transmitting rotation to the cutting part from the motor shaft. Its second purpose is to convert the angular speed of rotation of the output shaft to lower or higher speeds. In the first case, the device is called a “demultiplier” and is used on trimmers with powerful engines, in the second case it is called a “multiplier” and is installed on low-power tools. The gearbox is always located at the bottom of the boom of gasoline and electric scythes of different brands, be it “Champion”, Huter or another brand.

The gearbox structure looks like this: The main parts are a gear shaft (to transmit movement from the motor) and a gear mounted on the driven shaft (to rotate the cutting unit). To reduce the friction force during movement, rolling bearings are placed on the support points of the shafts. They are protected by special washers that preserve lubricant and prevent dirt from penetrating into the seat. All parts are placed in a duralumin housing with a special technological hole for lubricant injection. It is necessary so that you do not have to constantly disassemble the unit to perform lubrication.

Thus, the design of the gearbox, depending on the model and brand that produced the equipment (for example, Sterwins, “Foreman”), includes several gears interlocked with teeth to transmit rotation and moving at high speed. Due to significant friction, they get very hot.

Causes of malfunction and their elimination

In order to most accurately determine the cause of a malfunction of a trimmer of any brand (for example, Echo) and find out the possibility of eliminating it, you need to determine what action causes the device to stall. The engine can turn off both at idle and at high speeds, when heated up under load or immediately after starting, etc.

READ What kind of gasoline does a Stihl chainsaw run on?

If you stall at high speeds

If the carburetor stalls at high speeds, this means that at idle and low speeds it has enough incoming fuel, but not enough to operate at high speeds. Then you need to check the serviceability of the following trimmer components.

• Fuel hose - its integrity may have been compromised due to cracking. In this case, the part needs to be replaced. Or maybe you just need to tighten the clamps.
• The filter mesh between the carburetor and the hose for supplying the gasoline mixture - it could become clogged. In this situation, it is necessary to clean the part.
• The valve located on the gas tank cap could be stuck or clogged with debris. Cleaning is also necessary.
• Carburetor - perhaps as a result of constant vibration, it has become misadjusted. This is usually typical for cheap Chinese parts. To fix the problem, you need to configure it according to the instructions. In some cases, it is enough just to loosen the carburetor body. If the adjustment fails, you must install a new element.
• Additionally, you should check the air filter. It may need to be washed and cleaned or replaced with a new one, as it could become clogged with dirt and grass particles when the equipment is tilted when the user mows in hard-to-reach places.

Immediately after starting

The unit may stall immediately after starting if the carburetor is misaligned or incorrectly configured - this causes uneven fuel supply. The result of this is that the device begins to vibrate distinctly. To troubleshoot problems, the carburetor is reconfigured following the instructions for the mechanism.

The engine also stops when the fuel supply valve becomes clogged. In such cases, simply cleaning it is enough. If the lawn mower started working at first, but then immediately stalled, then fuel may be supplied to the carburetor unit with some difficulty. Loosening the valve helps solve the issue, which ensures free circulation of the mixture in the system.

A stop can also be caused by air leaks if there is mechanical damage to the hose (holes, cracks) that takes in fuel. In this case, you should increase the drive speed to quickly expel air bubbles from the system.

The gas mower stalls

When purchasing a lawn mower, you need to be prepared for the fact that, as with all other similar tools, breakdowns may also occur that require repair.

However, you should not immediately run to the service center and pay a lot of money to the technicians who convince you that there is a serious malfunction in the device.

The lawn mower stalls at high speeds on gas

Perhaps the most common complaint related to gas trimmers is: “The trimmer stalls.”

Of course, this could also be caused by a rather serious malfunction. However, most often the situation is much simpler than it seems at first glance.

To cope with such a problem, first of all, try to figure out its causes yourself, because once you find out the cause, it is much easier to deal with the problem, and sometimes it even self-destructs.

In fact, there are quite a few reasons why a lawn mower stalls at high speeds.

Another one is the presence of malfunctions in the power system.

In this case, the lawn mower will stall at idle speed. Problems with the power system can be caused by misadjustment or incorrect adjustment of the carburetor.

Misadjustment can be caused by vibrations that occur during the operation of the lawn mower.

Incorrect adjustment of the lawn mower can be corrected by simply adjusting it in accordance with the requirements specified in the operating instructions.

In addition, sometimes gasoline trimmers may stall due to the fact that the valve located in the gas tank cap is simply clogged or stuck.

To find out, try using a scythe while loosening the gas cap.

If the device operates properly in this mode, clean the valve.

Moreover, the lawn mower may stall due to poor fuel supply to the carburetor.

Why then does the device start, you ask?

The reason for this is that at first the fuel flows into the carburetor little by little and there is enough of it to operate at increased power.

However, then it is exhausted and at high speeds the engine begins to stall .

As for the carburetor, the problem here may also be that its body is too tight.

Why does the lawn mower stall? lawn mower | trimmer when pressing the gas, at idle, when hot

The reason why the lawn mower stalls at high speeds on gas may also be due to air leaks.

Why does the lawn mower stall? lawn mower | trimmer when pressing the gas, at idle, when hot

We are talking about the possible presence of a space through which air can pass during the heating process of the engine.

Among other things, don't forget to check the fuel pickup hose. The problem may be that it holds poorly or is completely cracked.

The brush cutter stalls when you press the gas. reasons, repair of lawn mowers loses momentum, goes out, doesn’t work

These are the main reasons why a lawn mower may stall .

When opening the air damper

It happens that the unit stalls when the air damper is opened, idling normally. This is due to air leaks from the system caused by cracks in the fuel hose or problems with the seals. The carburetor metering system may also malfunction, and the lawn mower will stop after opening the damper.

All possible reasons why the lawn mower stalls and how to eliminate them are contained in the following video

There are many reasons why a lawn mower stops, but the most common are malfunctions associated with its carburetor. They can arise in any case. The most problematic option is when a serious breakdown occurs and you will need to purchase new parts or replace the lawn mower.

In order for the trimmer to work properly for a long time, you must strictly follow the operating instructions. It is necessary to refuel the unit with a fuel mixture suitable for its composition; the device must operate under moderate load.

Basic elements of chainsaws

Before we begin to delve into the issues of tool breakdowns and repairs, let’s first figure out what the chainsaw itself consists of. First of all, I would like to note that this tool belongs to the category of equipment whose operation directly depends on the internal combustion engine.

READ Gasoline Trimmer Al Ko Bc 250 Video

It is also important that chainsaws are equipped with a single-cylinder engine that runs on fuel such as gasoline. It is worth noting that, despite its similarity with other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain transmission, through which the chain (saw) itself moves.

In fact, a chainsaw is a fairly simple design, but this does not prevent it from being reliable, practical and capable of fully ensuring immediate uninterrupted and cyclic operation even in quite difficult conditions. This tool consists of a huge Spectra of certain elements “vital” for its correct and productive operation. This is a carburetor, a direct chain tensioner, a tire equipped with a chain and other elements.

Before purchasing a chainsaw, be sure to explore all your options and choose the brand of chainsaw that suits you.

To make your choice easier, we have compiled a reliability rating of chainsaws for you.

If you have a limited budget, then read the article about Russian chainsaw manufacturers.

Insufficient chain lubrication prevents starting and the saw does not develop speed

Many people wonder: why does the chainsaw stall when I press the gas? The answer may also lie in insufficient chain lubrication (see chain saw oil), since the oil line may be leaking, or the direct channels may simply be clogged. That is why pay attention to the chain, because if it is dry, then without delay, start cleaning the channels that supply oil directly to the tool tire. Then inspect in detail the parts where the oil pump fittings are connected to the pipes. But if you notice that oil is leaking at the joints, or you find cracks in the tubes themselves, then in the first case, seal the leaks with sealant, and the tubes will have to be replaced.

What could have broken

Problems with a lawn mower, related to the fact that this device does not start, are classified in a certain way by service specialists. They highlight faults with the following mechanism components:

• an engine in which the piston and bearings may wear out or fail, or the crankcase may crack;
• fuel supply system, in which case the filter may become clogged or there may be problems with the carburetor;
• mechanical damage to wires, tubes, hoses;
• ignition circuit.

To correctly determine the unit where the breakdown occurred, you need to pay attention to the circumstances under which the trimmer stalls.

Additional Tips

First of all, what you should remember when purchasing this kind of tool is that certain parts of the saw need to be replaced with new ones after their service life (passport) has expired. It is for this reason that the instructions should always be at your fingertips, since everything is described there in detail.

These types of parts include: a sprocket (drive), a tire, part of the system (anti-vibration), and also a chain. Since we should not forget that if this “filling” is not replaced with a new one at the required time, then these worn-out spare parts will negatively affect the remaining parts of the chainsaw. It is for this reason that you should check the depth of the immediate tooth cutting quite often. Remember that it should not be higher than 0.5 mm a week.

Muffler as the reason why the saw stalls under load

Here is another reason why a chainsaw stalls when you press the gas - the muffler. It is this part that can interfere with the full operation of the tool in cases where it is directly contaminated with exhaust resinous deposits. To do this, you just simply need to clean it.

Sources:

https://hitech-online.ru/tehnika-dlya-sada/trimmer/glohnet.html https://stroysvoy-dom.ru/benzokosa-gloxnet/ https://machinspec.com/lesozagotovitelnaya/benzopila/pochemu-gloxnet .html

How to avoid brush cutter breakdowns?

The only way to avoid situations where a gasoline trimmer spontaneously stalls is to properly maintain the device, as we discussed in this article.

Carry out all routine maintenance in a timely manner, and when inspecting and checking the trimmer, be as meticulous as possible, this will allow you to detect a problem before it begins to affect the operation of the device.

Remember - all gasoline engines that are installed on lawn mowers are designed in such a way that they cannot stop working without a serious reason , so after even a single spontaneous engine stop, carry out a full diagnosis.

When heated

The brush cutter often stops when it gets hot. At the same time, it starts, works “with jerks” and gradually stops. This process occurs when gasoline boils in the carburetor or the damper in it is installed in a rotary type rather than a disk type. In the latter case, the part is changed.

It happens that the trimmer gets hot if the ignition circuit wire or coil is damaged. In order for the device to start working normally, parts are replaced.

Sources:

https://stroy-podskazka.ru/trimmery/benzokosa-glohnet/ https://www.agro-techservis.ru/ne-zavoditsya-trimmer.html/ https://industry60plus.ru/raznoe/ploho-zavoditsya- trimmer-benzinovyj-prichiny-prichiny-i-sposoby-ustraneniya-fozo-info.html https://lkard-lk.ru/avtolyubitelyu/pochemu-glohnet-dvigatel-trimmera-pri-nabore-oborotov-2

Trimmer won't start

Like any equipment, trimmers are subject to various breakdowns. Often at the beginning of the summer season, owners of such tools complain that the trimmer does not start, and they have to spend a long time looking for the cause of the malfunction.

For those who recently purchased a trimmer and are still at ease with this technique, information about why the trimmer does not start and what to do in this case will be useful. So let's find out what could be causing this.

Gasoline trimmer does not start - 10 possible reasons

Before attempting to operate the tool yourself, carefully read the instruction manual. Perhaps the information contained in it will give you some idea. Otherwise, you will have to look for the cause of the malfunction using the selection method. It may be one of the following:

1. The toggle switch on the rod is not turned to the “On” position. This is one of the most basic steps, but sometimes beginners forget to enable the tool before running it.
2. Similar errors include the lack of fuel in the tank. If the fuel runs out and you forget about it, just fill the tank (usually located near the engine) with AI-92 gasoline.
3. Missing, incorrect mixture or incorrect proportion of engine oil. Ideally, no more than 50 g of oil should be added regularly. This will provide additional lubrication and will keep your trimmer's motor running. Also keep in mind that there are different types of oil (“synthetic”, “semi-synthetic”, “mineral water”) - they all have different effects on the operation of the mechanism.
4. If your trimmer won't start after winter, drain the remaining fuel in the gas tank and replace it with fresh fuel. This is especially true for small, low-power trimmers with small motors that are sensitive to poor quality mixtures. In addition, over the winter, sediment may form at the bottom of the gas tank, which can cause problems with the operation of the device.
5. Excessive pumping of fuel can also be one of the reasons that the trimmer stalls and does not start. When the air damper is closed, the spark plug is filled with fuel. It should be unscrewed and dried, and then inserted into place and try to start the engine while holding the gas trigger. It is advisable to check it beforehand for the presence of a spark between the electrodes. If there is no spark, the spark plug should be replaced.
6. Problems with the filter. If your trimmer has trouble starting, remove the air filter and run the tool without it. If everything works out, the filter should be replaced with a new one. Another option is to thoroughly clean and blow out the old one, but sooner or later you will still have to replace it.
7. Has your trimmer stalled and won't start? Try cleaning the so-called breather - an element designed to equalize the pressure in the gas tank. Cleaning can be done with a regular long needle. A clogged breather often causes a malfunction.
8. The knives have been removed from the machine - some models will not work under this condition.
9. Violation of tightness. You can check this using a pressure gauge. If the pressure begins to drop, you should determine which carburetor part is faulty. Most often, the carburetor gasket wears out.
10. Sometimes, after a long period of operation, you may notice that the trimmer has overheated and will not start. First, you should know that you should definitely take breaks. The amount of continuous operation time recommended for this model should be indicated in the instructions. Also, the problem of overheating may lie in a faulty ignition coil or in the air cooling system, which prevents overheating.

If none of these steps work, you should contact a repair shop or service center.

Website about the dacha

12/08/2018 admin Comments No comments

Why does the trimmer stall when you press the gas? Prerequisites for stopping the trimmer at high and idle speeds, when heating or opening the air damper. What to do if a gasoline trimmer starts up and then stalls?

A gas-powered scythe is a necessary thing for owners of personal plots and lawns, and when the trimmer suddenly stalls, the work of clearing the area of ​​grass stops. The device itself is a rather complex mechanism, therefore there are many different circumstances of its breakdown. More frequently encountered problems are contained in the instruction manual. You should know the reasons why the trimmer stalls so that you can repair the device without the help of others.

Why the lawn mower won't start - troubleshooting

While caring for their garden plots, summer residents are sometimes faced with the fact that the lawn mower does not start. There are many circumstances for tool failure. The trimmer does not start well. To correctly diagnose the problem, the owner of a useful unit at the dacha should know the structure and operating mechanism of its individual parts.

Since a gasoline trimmer is a complex device, you need to carefully study the instruction manual 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 won’t the lawn mower start?

? A long seasonal break in work, improper storage and untimely maintenance of the trimmer will cause a lot of trouble for the summer resident to eliminate the causes.

What's the result?

As a result, we add that fuel lines, connections and hoses are rubber products. For this reason, you should keep in mind that natural aging of rubber occurs. On cars that are more than 10 years old, cracking of rubber hoses becomes a common occurrence, which leads to air leaks. It should be added that the external condition of such hoses is not a clear indicator of their condition. The inner surface of the walls is also destroyed, which leads to particles entering the injector, carburetor or fuel injection pump, unnoticeable from the outside, especially when the problem occurs in areas behind the fuel filter.

READ What kind of oil can be poured into a gas trimmer

The main reasons why the engine starts to stall after warming up. Frequent problems with carburetor and injection engines, diagnostics of defects.

The car engine starts and stalls immediately after starting: the main reasons for this malfunction. Diagnosis of probable circumstances, tips and advice.

As a result, jerks and dips occur when accelerating, the car jerks in motion during transition modes. Prerequisites and elimination of defects.

Floating idle speed of the engine “on cool”. Main malfunctions, symptoms and identification of breakdowns. Unbalanced idling of a diesel engine.

Prerequisites for which, after pressing the accelerator pedal, dips appear and the engine begins to swell. Gas engine failures when switching from gasoline to gas.

Why can the engine have high idle speed? The main prerequisites for high idle speeds on an injection engine and engines with a carburetor.

Problem solving

The operation of the equipment must be correct, with periodic inspection of components to prevent breakdown. To troubleshoot problems, check that all hardware components are working correctly.

If the chainsaw starts and lags, you can fix the cause yourself. If it is a lack of fuel or an incorrectly prepared fuel mixture, it needs to be corrected. To prevent chainsaws from idling, it is always necessary to drain the remaining fuel.

Spark plugs should be checked periodically. In this case, remove carbon deposits that are blocking the connection gap and check the fuel tips. Another cause of spark plug malfunctions may be that they are wetted with gasoline. To do this, remove them, wipe with a cloth and let dry. Defective spark plugs are replaced.

If there is no spark between the spark plug and the high voltage wire, but if they are well connected, the ignition unit must be replaced.

A clogged muffler is a common cause of failure, causing the chainsaw to immediately start and stall. To eliminate the malfunction, it is necessary to dismantle the muffler, clean it of soot with sandpaper or a special chemical solution. If the chainsaw model is not separated, chemicals are poured into the system and remain there for several hours, it is purged.

The carburetor must be adjusted if the chainsaw is idling. Fine-tuning is a rather labor-intensive process, so it is usually performed in service centers. But, on some models there are elements for adjusting it; just turn the bolt half a turn to increase the speed of the chainsaw, the problems will be eliminated. If the injectors, injectors, air lines and filters are clogged, the entire carburetor must be disassembled and cleaned. When seals, gaskets, and cuffs wear out, they must be replaced to prevent air from being “sucked in.”

If you have problems with your fuel or air filter, you will need to replace the fuel pump or clean the air filter.

If breathing is blocked, clean it with a regular needle.

When a chainsaw starts and immediately dies, the cause may be a chain failure. To troubleshoot, check the oil in the chain oil tank as well as the exhaust pipe for damage or blockage.

When inspecting the piston group, pay attention to the cylinder; if necessary, replace it or the piston. You can drill the cylinder to fit the dimensions of the new piston. If the piston and cylinder are normal, you should pay attention to defects in the piston rings and the need to replace them.

Among other things, it is necessary to monitor the service life of the parts specified in the product passport, including the drive sprocket, tire, chain, part of the anti-vibration system, and replace them in a timely manner.

With long periods of inactivity, it is necessary to check the condition of the fuel line. If the tube cracks, you will have to replace it with a new one.

Source

Troubleshooting

• engine malfunction (piston wear, bearing failure, crankcase crack);
• malfunction of the fuel supply - clogged pores of the air filter or carburetor malfunction;
• The ignition system does not work;
• mechanical malfunction - 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 in accordance with 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. 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 engine will overheat. You can mow for less 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 find 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.

Why is it bad to start a chainsaw and forget it?

If the equipment starts poorly “in the cold,” the problem may be insufficient compression, that is, the rings wear out after a long service life and need to be replaced. Sometimes the cause of poor cold starting is a problem with the muffler, as well as poor contact between the spark plug and the wire.

Also, the reasons for poor starting may be wear or damage to the gasket or rubber seal in the carburetor accelerator pump, which causes additional air flow, which leads to an increase in saw speed.

Carburetor adjustment and tuning

The maximum and minimum engine speeds and smooth idle are controlled by the carburetor. The stable operation of the lawn mower depends on the amount of supplied combustible mixture and air and their ratio. The lawn mower will not start if the carburetor adjustment is incorrect. The order of setting the device for supplying fuel at low speed (L), high speed (H) and idle speed (T) is regulated by the screws of the same name:

1. The chainsaw must run for at least 10 minutes, since the adjustment is carried out while it is hot.
2. Screw H is turned smoothly to maximum speed, then turned ¼ counterclockwise, reducing the speed of rotation of the motor shaft.
3. The idle speed is adjusted with screw T, ensuring that the scythe does not rotate.
4. Screw L is adjusted by first opening the throttle as much as possible, and then smoothly reducing the speed to a stable minimum.

After adjustment, a working carburetor with cleaned filters and a checked ignition should ensure engine operation. If the carburetor malfunctions, after it has been repaired, the feed system will again need to be adjusted before starting the lawn mower.

Rare breakdowns that prevent the operation of a lawn mower can include:

• rewind spring malfunction;
• broken or stuck starter pulley;
• faulty starter assembly.

The most important malfunction, the elimination of which is associated with engine replacement, may be failure of the engine piston group. The cost of repairs will cost approximately 70% of the cost of the product. This video will help you understand the reasons why the lawn mower won’t start:

Where to start diagnosing a lawn mower

If the lawn mower does not start or stalls immediately after starting, it is necessary to sequentially check all the main components and assemblies. 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 the main problems, which can be eliminated after a thorough inspection.

Checking the fuel mixture

Before starting the gasoline scythe engine, check the availability and quality of the fuel mixture. Don’t save money, don’t be greedy, and don’t be “clever” in this matter. The best lightweight petrol trimmer

. Repairing or replacing the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). The oil-fuel mixture must be prepared strictly according to the instructions. Calculate its quantity based on real needs. The excess gasoline remaining after work loses its quality over time.

We diagnose the spark plug and spark plug channel

If the quality of the fuel mixture is not in doubt, and the lawn mower stalls when starting, then the cause may be a flooded spark plug. Here, a regular spark plug wrench (surely every motorist has one) and a spare spark plug are suitable for repairs.

• We unscrew the candle and wipe it;
• Dry it thoroughly (do not heat it);
• We drain the excess fuel in the chamber through the spark plug hole and dry it;
• We clean the old candle from carbon deposits using a file or a lady’s nail file;
• We set the gap with a distance of 1 mm (you can check it with any coin);
• We return everything to its place and try to start the trimmer.

See also

You need to dry the canal for at least 30–40 minutes. Otherwise, there is a risk of re-filling a new spark plug.

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

If the trimmer engine still does not start, a reason such as lack of spark due to poor contact between the spark plugs and the high-voltage wire should be excluded. Brushcutter trimmer review comparison. If the connection is good, but there is still no spark, most likely your ignition unit has failed. Here you won’t be able to do without a specialist, since the part is not repaired, but sold as a single unit.

BRIGGS STRATTON lawn mower repair

If the engine is running, it is not clear how to start

not always,
it stalls
under load - it’s time to disassemble it.

PROBLEMS WITH BRIGGS STRATTON. Lawnmower.

Does not start

,
Stalls
, Bang-bang-bang, Gasoline drips from the carburetor and other malfunctions on lawn mowers

Diagnostics of lawn mower filters

Another reason why a gas scythe stalls may be the air filter. To eliminate this, try removing the filter and starting the trimmer without it. If it works out, 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 gasoline trimmer may not start due to contamination of the fuel filter. This is the next stage of 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. Petrol scythe trimmer

calm. Haste can result in repair of the engine piston group.

Breather and exhaust channel

See also

Often, “delicate” branded models of 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. When this unit becomes clogged, a vacuum is created in the tank, preventing the supply of fuel. The problem can be resolved by cleaning the breather. Huter trimmer won't start. You can use a regular needle for cleaning.

The normal operation of scythes with internal combustion engines may be disrupted due to dirt getting into the exhaust channel or clogging of the muffler mesh. The petrol trimmer does not start. This problem occurs on older generation models. The issue can be resolved by traditional cleaning and removal of the anti-spark mesh.