What to do if the mower won’t start

The petrol lawn mower won’t start: what to do

Any technical equipment requires a competent approach to operation. If used improperly, there is a risk of sudden breakage of any part, causing damage to all equipment. Lack of timely diagnostics, maintenance of electrical appliances can damage the structure of an unauthorized person. Only proper maintenance of the equipment will guarantee the smooth functioning of a product such as a gasoline lawn mower. Failure to comply with these conditions does not always provoke the failure of the unit, although all actions were performed as usual.

Self-service approach to troubleshooting

If you have done everything as usual when starting the mower and it will not start, it is recommended that you check the fuel tank. If there is no gasoline, refill the container to the required level. If the mechanics have been in the off mode for a long time, gasoline vapors may escape. To be sure that the fuel has not lost its chemical properties, it is advisable to drain the residues, fill the tank with fresh contents, try to start the technical device again.

If fuel and lubricant enters the engine, ignition may occur. Therefore, the procedure must be performed carefully. Check the mower data sheet for the best fuel for this model..

There are other factors affecting the dysfunction of the structure..

Actual tips for use:

  • Before starting the product, we advise you to pump fuel into the carburetor, setting the maximum power. Then you need to carefully pull the starter cord to the base, pull it towards you with a sharp confident jerk.
  • Incorrect position of the choke valve on first start-up may cause a malfunction. Depending on the ambient temperature, it can be closed completely or set to neutral. Subsequently, a complete opening of the lid is a prerequisite..
  • The air filter tends to get dirty. Therefore, before starting, it is necessary to check its serviceability. To do this, turn off the engine, disconnect the wire from the spark plug. The mechanism will have to be removed from the apparatus, rinsed with an alcohol-containing product, and dried well. The average statistical time of its use is 25 hours, so you can find your bearings, wash it or buy a new one.
  • A defective spark plug can interfere with engine operation. To check the functionality, unscrew it, clean it, make sure there is a spark. Next, you need to set the damper handle to the “closed” function, after which you can start the electric machine in action. If cleaning the spark plug does not help, seek help from a specialized repair shop..
  • Remember to constantly inspect the device for contamination. This is especially true of the lower part of the lawn mower, since clogging of the bottom of mowed grass, dirt occurs almost every time it is used, it is necessary to clean the cavities in a timely manner.

In the case of a normal mower plant, almost immediately stopping the engine, it can be assumed that the crankshaft or piston has jammed. Also, do not forget that there must be an optimal amount of oil in the crankcase. If the coupled parts move with difficulty, most likely there is not enough lubrication, this explains the stagnation of the equipment..

If you wish, you can get detailed advice. Our workshop carries out diagnostics and repairs of lawn mowers. If you need advice, please contact us by phone 7 (495) 131-21-63. We work from 09:00 to 21:00, please contact us, we will be happy to help you.

The petrol lawn mower will not start. Why?

The lawn mower will not start

If at the first start, your new lawn mower refuses to start, try the following: based on the air temperature outside, set the appropriate position of the air damper (at temperatures less than 30 C – “damper closed”, over 30 C – half-closed position), then pump into the carburetor fuel and gently, but rather sharply, pull the starter handle until you feel some resistance. Repeat these steps in the same sequence several times. A brand new instrument must start. If this finally happened, you can safely get down to work, having previously fully opened the damper.

If the lawn mower is no longer new, then it is necessary to start its inspection from the gas tank. If the device has not been in operation for a long time, then it is necessary to drain the old gasoline, which has the feature of “running out”, i.e. lose their octane properties, and refill with fresh fuel mixture. The gasoline / fuel ratio, as well as the required grades, are usually indicated in the operating instructions for the tool..

Now you need to check the spark plug – either the problem is in it itself, or in the fuel system. The candle must be carefully unscrewed and its condition assessed. If the candle is heavily flooded or there is black carbon on it, then it must be removed, cleaned and dried. Drain the excess fuel, if any, from the spark plug holes, drain the cylinder itself, then screw in the dried or, even more desirable, a completely new plug. If the plug was completely dry initially, you need to look for a problem in the fuel supply system. First, check the fuel filter. To do this, disconnect the suction hose and remove the dirty filter from it, clean it and reinstall it, or replace it with a new one. If this does not help, you should contact the service center specialists..

Will not start after winter

In this case, you just need to drain the old and possibly even frozen fuel and fill in the freshly prepared mixture. Then you need to perform the same manipulations as during the first start of the lawn mower..

Starts up and stalls

If the mower stalls after starting, check the air filter. When this filter is heavily clogged with dust, it stops passing the required amount of air into the carburetor and allows dust to enter the fuel mixture. It is necessary to carefully remove the contaminated filter, clean and rinse in gasoline. If the air filter is clean, and the tool still stalls, then it is better to contact a professional to determine the cause of the malfunction and eliminate it..

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Repair and service of garden equipment.

Specialized service center “Agrotechservice”. comprehensive warranty and post-warranty maintenance of garden and municipal equipment from world manufacturers! We sell spare parts with delivery throughout Russia!

The mower will not start due to poor fuel supply

When your petrol lawnmower will not start, the first step is to check that there is fuel in the tank. If it is absent, add it to the required level..

Another very popular option that the lawn mower engine will not start is a problem with the gas tank plug valve. If the valve is clogged on it or does not work, then the pump simply cannot pump fuel.

The mower may not start if the position of the air flap is incorrect 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..

The mower may not start if the air filter does not allow air to pass through properly due to contamination. To fix this problem, you need to remove the filter and clean it. If the filter is heavily soiled, replace it.

A common reason for the inability to start the mower engine is a problem with the carburetor, most often it is simply clogged with dirt and the remains of low-quality fuel. It is necessary to flush the carburetor and adjust the fuel mixture supply.

List of Reasons Your Gasoline Lawn Mower Won’t Start

The lawnmower will not start malfunction can be caused by the following:

  • insufficient fuel level in the tank,
  • fuel line malfunctions,
  • clogged air filter,
  • gas tank plug valve does not work,
  • incorrect position of the air valve,
  • spark plug does not work,
  • no voltage is applied to the spark plug,
  • clogged carburetor,
  • lack of engine compression.

If you cannot fix the problems yourself, you need to contact a service workshop for the repair of lawn mowers..

Lawnmower will not start due to poor ignition system

Another reason your petrol lawnmower won’t start could be a faulty spark plug. The spark plug must be removed. clean it and adjust the thermal gap.

A frequent breakdown leading to problems with starting the engine may be improper starter operation. It is necessary to check the correct position of the starter, the correct winding of the cable. It is necessary to make sure that the starter provides voltage during operation..

The lawn mower won’t start, what to do?

Lawnmower Will Not Start – Causes of Malfunction

A petrol lawn mower may not start for three groups of reasons:

  • power system malfunctions;
  • malfunctions of the ignition system;
  • problems in the block of cylinders.

High-quality repair of gasoline lawn mowers in the service center

Our service center repairs lawn mowers from the following manufacturers:

  • Husqvarna (“Husqvarna”),
  • Hitachi (“Hitachi”),
  • Viking (“Viking”),
  • STIHL (“Stihl”),
  • Craftsman,
  • AL-KO (“Al-ko”),
  • Champion (“Champion”),
  • Partner (“Partner”),
  • Makita (“Makita”),
  • Honda,
  • DDE (“DDE”),
  • MTD (“MTD”),
  • Oleo-Mac (“Oleo-Mac”),
  • Hammer,
  • Efco (“Efko”),
  • TEXAS (Texas),
  • Profi (“Profi”),
  • Homelite.

Our workshop carries out repairs of lawn mowers and lawn mowers of any model. We have a large warehouse of components in our arsenal, which allows us to carry out work as soon as possible. By contacting our service center, you will receive a high-quality repair of lawn mowers at a high professional level! During the work of our service center, specialists have already performed many repairs of garden equipment.

If your lawn mower does not start, we will fix this problem!

Your lawn mower will start the first time!

We accept for repair lawn mowers: Stihl, Husqvarna, Hater, Hyundai, Makita, Partner, Patriot, Ryobi, Alpina, Daewoo, Efko, Fubag, Graphite, Hitachi, Makskat, MTD, Oleo-Mak, Patriot, Sparky, Storm, Tsunami, Bison, Master, Caliber, Honda, Oleomak, Huuter, DeWalt, Bosch, Steel, Carver, Mobile, Parma, Stavr.

The Alfa-Rost company performs urgent high-quality repairs of lawn mowers at low prices in Rostov and the Rostov region. We carry out all the necessary list of work on the repair of lawn mowers and other gasoline equipment and tools. We will troubleshoot your equipment, the mower will start well.

the lawn mower will not start on a cold

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

Read more:  The grass mower will not start

Top Reasons Lawn Mower Not Starting — Lawn Mower Troubleshooting

the lawn mower starts up and stalls. What to do?

There is a spark, and everything seems to be normal, but the lawn mower will not start, in such cases, you should check the air inlet valve to the fuel tank. A clogged valve leads to the creation of a vacuum in the tank, in which the carburetor does not receive enough gasoline, so the lawn mower will start, but then stall. To exclude this reason, you need to clean the valve and try to start the lawn mower with the tank cap not completely twisted..
2. If this does not start the mower, remove and clean the fuel filter and check all carburetor parts and then try to start. The lawn mower does not start again, the air filter is disconnected, try to start without it, if the mower starts up, the reason is in the air filter, replace it.

the lawn mower will not start, the spark has disappeared

The loss of a spark entails checking the contacts and the correctness of the gap between them, the conducting wires to the candle and the candle itself.
The way to check the spark is to unscrew the candle, connect a wire to it, put the candle sideways to the motor casing and pull the starter several times as if starting the lawn mower, while you need to look at the coal and the contact of the candle, a spark should run between them.
If there is no spark, take a new candle, follow the same procedure, if the spark cannot be traced, then there is a problem in the wire or contacts, it is better to replace them.

the lawn mower won’t start after winter

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

It should be borne in mind that products of such well-known companies as STIHL, Husgvarna and other brands will not run on cheap, low-octane gasoline..
Suitable fuel for them is from the AI ​​brand – 92 and higher from car gas stations and then from well-recommended ones, since there is also bad gasoline at gas stations. 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 when the diluted fuel mixture is stored for a long time, its working qualities fall, which also leads to consequences in which the lawn mower does not start. Therefore, it should be diluted in portions, that is, the amount of the mixture that is produced at a time.
The operating instructions clearly describe and explain the mixing ratio of gasoline and oil. Strict observance of the correct proportions will at least save you from several questions, why the lawn mower does not start and what to do in such cases..

mower, start

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

To understand this, you need to know the principle of operation of the unit as a whole. It also happens that, just bought, a new saw does not start, and it starts running around the service centers, in such cases it is recommended:

carefully read the instruction manual;
to study in detail the method of the first start-up and running-in of lawn mowers;
try to understand how the product works;
how gasoline is pumped up and so on.

Causes of malfunctioning lawn mowers:

the quality of the gasoline is poor;
incorrect proportion of gasoline and oil;
clogging of the fine filter;
the spark was gone.

the lawn mower will not start when 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 the gas trigger is released. If enough time has passed and the lawn mower has cooled down, then it should be started as if it was cold..
If the above methods did not help, the lawn mower did not start, then you should contact the service center.

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Repair and service of garden equipment.

Specialized service center “Agrotechservice”. comprehensive warranty and post-warranty maintenance of garden and municipal equipment from world manufacturers! We sell spare parts with delivery throughout Russia!

Trimmer won’t start after winter

How to be in such a situation? Don’t worry and panic. This is a very common problem that can be solved in just 3-4 minutes. Firstly, if last year’s fuel remains in the gas tank, then it must be drained. Gasoline loses its octave properties after 2 weeks of inactivity. Secondly, you need to start a lawn mower after a long stagnation in a slightly different way. First you need to open the throttle and pump a little fuel mixture into the carburetor, then pull the handle until you feel a little resistance. After that, you can start the trimmer..

Petrol trimmer does not start well

So what if the petrol trimmer won’t start well or won’t start at all? The most common reason for such a breakdown is poor quality fuel. Remember that, for example, trimmers of the brands “Stihl” and “Husqvarna” are unlikely to start on fuel quality lower than AI-92. You should not save on fuel, because repair of parts of the cylinder-piston group can be one third of the total cost of the scythe, and sometimes even half. Also, when preparing the fuel mixture, it is necessary to correctly observe the proportions of fuel and oil, which are always indicated in the instructions for the trimmer..

What to do if high-quality fuel is poured into the gas tank, there is a spark, but the tool still refuses to start? It is necessary to check the condition of the candle. It is located in the center of the mower body. It must be carefully unscrewed and make sure there is no plaque on it. If there is, then carefully clean the candle from carbon deposits and dry it.

If the lawn mower does not start even after the methods suggested above, then you need to try to remove the air filter and start the device without it. If the trimmer still does not work, thoroughly dust the old filter or buy a new one..

It also happens that the mower works for a maximum of 5 minutes, and then stalls and does not start until it cools down. In this case, try opening the filler cap of the gasoline filler cap – a suction sound should appear. Then screw the cap back on. If you do this manipulation while the trimmer has just started to stall, then the speed will be restored, and you can continue to work. If the mower stalls before opening the lid, then you just need to start it as expected according to the instructions.

Trimmer won’t start. Why?

A petrol trimmer is a surprisingly useful thing that can be used to clean up not only a miniature lawn in the backyard of the house, but also mow a lawn of considerable size without any extra hassle. But, like all things in this world, it tends to break. In this article we will try to figure out what to do in cases where the trimmer refuses to work..

Trimmer starts and stalls

If, when you try to start the trimmer, it starts, but immediately stalls, then the air filter may again be the reason for this. It is necessary to remove it and check if it is clogged with dust. If this is true, then you need to thoroughly clean it or purchase a new one. Also, the problem may lie in the malfunction of the ignition coil. In this case, it is better to take the mower to a service center..

  • Blog
  • About the service center
  • Serviced brands
  • Diagnostics and repair prices
  • Delivery
  • Spare parts
  • Contacts

Repair and service of garden equipment.

Specialized service center “Agrotechservice”. comprehensive warranty and post-warranty maintenance of garden and municipal equipment from world manufacturers! We sell spare parts with delivery throughout Russia!

Why the lawnmower won’t start?

Troubleshooting by professionals

The service station is not only for the car, but also for the garden technique. Usually, a service center is contacted in case of a piston and carburetor malfunction of the device. Why and why the gasoline lawn mower does not start in these cases is determined by the master:

  • Damage to the integrity of the device or individual parts – with a tonometer, using pressure, they find the affected area, seal it.
  • Clogging of channels, nozzles – elements are blown with air, cleaning fluids are used.
  • Worn pistons, gasket – replace the assembly part.

How to start a lawn mower when the engine stalls at home

It is especially difficult to start the mower after a long period of inactivity. What should the user do when the sado-technician refuses to work:

  • If the device has not been cleaned for a long time, you need to flush the air engine, it is cleaned with gasoline (it is advisable to do this every 24 hours of operation). You can remove the filter from the device and start the unit, if the mower is working, then the reason lies precisely in this.
  • After winter, the remains of old gasoline in the tank can interfere with the operation of the device. The problem is easily eliminated if the fuel is replaced with a new one..
  • An insufficient amount of oil in the crankcase can also be the reason why the gasoline lawn mower will not start. Check its presence, whether there is fuel in the tank.
  • Incorrect position of the air damper during the first start. At a temperature ≥ 30 C, it must be in the middle position or closed. On restart – open.
  • Jamming of the crankshaft, piston – can be eliminated by moving these parts a little. The main thing is to do it carefully so as not to break the mechanism..
  • Dirty breather – the fuel supply stops, the part needs to be cleaned.
  • Dry threaded connection – with this factor there is no ignition spark, lubricate the connection with gasoline.
  • Spark plug malfunction – accumulation of oil on it, plaque. The candle is unscrewed, dries well, cleaned with a nail file. Excess fuel is drained, dried for at least 30 minutes. candle hole. The part may need to be replaced if it cannot be cleaned.
  • The contact of the high-voltage wire and the spark plug is also checked for the presence of a spark. If the latter does not occur, the malfunction of the ignition system will be identified and eliminated only at the service center..
Read more:  How to Make a Lawn Mower Out of a Washing Machine

Symptoms of problems

The first thing that a user can notice is a deterioration in the quality of the device. The grass is not mowed evenly enough, leaving missing spots on the lawn. This happens because the motor starts to junk, its power decreases. TOP 5 symptoms indicating a problem:

  • Increased vibration of the device.
  • Increased operating noise.
  • The lawnmower starts and stalls.
  • The device shuts down by itself.
  • The car whistles.

The main 3 reasons the lawn mower stalls are improper operation, overloading, prolonged operation (engine overheating). The system is cooled down thanks to the air filter, it should be checked every time you use garden technology. What to do to prevent the mower from stalling – before turning on the device, check the presence of gasoline in the tank, whether there is oil. It is recommended to clean the filter after each mowing.

The structure of a gasoline lawn mower

Before you repair the device, you need to figure out what it consists of. There are many models of garden equipment from different brands: self-propelled, non-self-propelled. They are all arranged in the same way. The constituent elements of the structure:

  • platform on wheels;
  • gasoline engine (starter, carburetor, ignition and fuel supply system, air damper, filter, piston system, fuel tank.);
  • manual handle;
  • water jet nozzle;
  • cutting elements (knives);
  • grass collector (container);
  • unit for throwing out freshly cut grass;
  • buttons, control levers;
  • body (aluminum, steel, plastic).

Why the lawn mower won’t start, reasons

You can figure out what caused the device to malfunction by disassembling it. This must be done carefully and carefully, there are many small parts inside that are easy to break. There are 2 types of damage: mechanical, electrical. Let’s take a look at the most popular reasons why the mower won’t start and stall:

  • the carburetor is out of order;
  • bolted connections loosened;
  • breakdown of the motor;
  • the moving components of the mechanism (crankshaft, piston) are jammed;
  • blocking of the cutting tool (cylinder) with a foreign object – branches, sticks, hard grass, stones, etc.;
  • the oil and fuel supply system is broken;
  • the spark plug is out of order;
  • stretched, belt broke;
  • small or too large clearance between parts inside the structure;
  • faulty switch of the device;
  • dirty fuel hose, ventilation grilles;
  • clogged air filter.

If you use the petrol lawn mower for a long time without interruption, the device will stall. Why does the lawn mower stall and not start hot? Motor overvoltage occurs. It is better to postpone mowing, let the lawn mower stand, after it has stalled, most likely the reason lies in the overheating of the device..

Prevention of malfunctions

The rules for operating garden equipment are not complicated, if you adhere to these points, the device will last longer than the expected period:

  • Always use a good quality fuel mixture.
  • Do not work in the rain.
  • Prime fuel to carburetor.
  • Pour the required amount of gasoline into the tank, exclude the ingress of fuel on the engine.
  • Mow intermittently. Give the device some time to cool down and rest. The petrol lawn mower will often not start when hot.
  • Clean the complete structure only after the engine has cooled down. Should be cleaned: knives, channels, filters, container. It is advisable to do this with the use of special cleaning solutions – this way it will be possible to avoid corrosion of metal elements..
  • Store the device in a dry, warm room, eliminate moisture ingress.
  • During work, do not put pressure on the device, make smooth forward movements, move along the site. Chaotic back and forth movements – wear out the unit faster.
  • If the device is not used for a long time, you need to replace the fuel with a new one. Gasoline stagnates in the system, does not allow the unit to function normally.

It should be noted that with the onset of cold weather, the car is removed as unnecessary, it is recommended to drain all gasoline for this period (it is explosive during stagnation). How to properly prepare the mower for work after winter: inspect the entire body for defects, drain and replace gasoline, check for oil, start the machine for the first time with the air damper slightly open or closed.

Why the lawn mower won’t start – troubleshooting

Caring for the personal plot, summer residents periodically encounter the fact that the lawn mower does not start. There are many reasons for tool failure. To correctly diagnose the problem, the owner of a useful unit in the country needs to know the device and the principle of operation of its individual parts.

  • How to start diagnosing lawn mowers
  • Checking the fuel mixture
  • We carry out diagnostics of the candle and candle channel
  • Filter diagnostics for lawn mowers
  • Breather and exhaust port
  • More complex reasons for lawn mowers failure
  • Rules for the operation and storage of lawn mowers

Breather and exhaust port

Often, “gentle” branded lawn mowers will not start and stall due to a dirty 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, which prevents the supply of fuel. You can eliminate the malfunction by cleaning the breather. You can use a regular needle for cleaning..

Normal operation of streamers with internal combustion engines can be disrupted due to the ingress of dirt into the exhaust duct or clogging of the muffler mesh. There is such a problem on older generation models. The issue can be resolved by traditional cleaning and removal of the anti-spark grid..

Filter diagnostics for lawn mowers

Another reason why the gasoline scythe stalls is the air filter. To eliminate it, 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 through and thoroughly clean the old one.

The petrol trimmer may not start if the fuel filter is dirty. 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 inlet without a filter at all, this is prohibited by any operating instructions. Haste can turn into repair of the engine piston group.

We carry out diagnostics of a candle and a candle channel

If the quality of the fuel mixture is not in doubt, and the lawn mower stalls when started, then a flooded candle may be the cause. Here, for repairs, an ordinary candle wrench is suitable (every motorist probably has) and a spare candle.

  • We unscrew the candle and wipe it;
  • Dry it thoroughly (do not ignite);
  • 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 file;
  • We set a gap with a distance of 1 mm (you can check with any coin);
  • We put everything back in place and try to start the trimmer.

It is necessary to dry the canal for at least 30–40 minutes. Otherwise, there is a risk of re-filling and a new candle..

If the candle 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 damp. No matter how wonderful spark the candle gives out, there is simply nothing to light up in a dry chamber..

If the trimmer motor still does not start, a reason such as the absence of a spark due to poor contact between the spark plugs and the high-voltage wire should be ruled out. If the connection is of good quality, and there is still no spark, most likely, your ignition unit has “flown”. Here it will not be possible to do without a master, since the part is not repaired, but is sold as a single unit.

How to start diagnosing lawn mowers

If the lawn mower does not start or immediately stalls 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 major problems that can be eliminated after a thorough inspection..

Checking the fuel mixture

Before starting the engine of the gasoline streamer, check the presence 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). Prepare the oil-fuel mixture strictly according to the instructions. Calculate its amount based on real needs. Excess gasoline left over after work loses its quality over time.

More complex reasons for lawn mowers failure

If the step-by-step troubleshooting algorithm does not work, and your scythe still does not start or stalls, it is worth inspecting the carburetor and the engine itself. A clogged carburetor can be one of the reasons for erratic tool performance. There are three main problems here:

  • Clogged ducts or nozzles. All this is cleaned by special washes or blown by a powerful jet of compressed air from the compressor. Do not use needles and wires, as the bore 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 it with a suitable pressure gauge. Watch the readings: if they do not change, everything is fine, but if the pressure starts to drop, 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 gasoline trimmer may not start due to wear of the piston group. If chips, scratches or scuffs are found on the piston or cylinder, they should be replaced. Piston rings are subject to mandatory checks. A small backlash of the piston when rocking the connecting rod indicates that it is time to change the rings. It is best to entrust this procedure to the specialists of the service center..

Lawn Mower Won’t Start. How to fix it in minutes, for free.


The main reason for the failure of the mechanism can be called improper use. With knowledge of the principle of operation and mechanisms of garden equipment, you can troubleshoot with your own hands. But it is still better to consult a specialist, especially in case of serious breakdowns. Among the most common breakdowns, the following can be distinguished:

  • Noise unusual for garden equipment. This is usually due to loose bolts or poor housing. It is necessary to carefully inspect all components and tighten the bolts. If the noise resembles a whistle, a foreign object is most likely caught in the mechanism. It is necessary to turn off the mechanism and remove a foreign object;
  • The case shakes unnaturally during operation. Most likely, the reason is a malfunction of the cutting element that needs to be replaced;
  • The mower will not start. First you need to check that there is a sufficient amount of gasoline in the tank. If this is okay and the engine is not running, a faulty spark plug could be a possible cause. In other cases, it is recommended to contact a specialist, since it will not be easy to repair the mower yourself;
  • The engine does not pick up speed and immediately stalls. The cause may be a jammed mechanism. If this happens due to a lack of lubrication, you need to pour oil into the crankcase and set the mechanism in motion;
  • Uneven lawn surface. This means that the cutting elements are dull and do not cut the grass well. It is necessary to sharpen the knives, and it is better to replace them with new ones;
  • The mower does not move or is difficult to move. First of all, you should check if the mowing height is correct..
Read more:  DIY Lawn Mower

All of the above malfunctions can be eliminated by yourself, without contacting specialists..

The lawn mower does not pick up grass

This could be due to faulty or dull knives. In order to avoid such a situation, you need to install new knives every season. You can also do without sharpening the knives at an angle of 30 °.

When sharpening, you must protect yourself with special goggles and protective gloves. After sharpening, you need to test the balancing of the knives..


It is worth listing a few tricks by which you can keep your garden equipment in excellent condition and minimize the need for special maintenance..

mower, start
  • If the mower has not worked for a long time, it is necessary to drain the stagnant gasoline, as shown in the photo;
  • Carefully pour high-quality gasoline into an empty tank using a watering can;
  • If necessary, add a carburetor priming primer and set the maximum speed.

Frequent lawn mower breakdowns: overview and problem solving

When using a gasoline lawn mower to mow the lawn, you need to be careful and follow the rules of operation exactly. After completion of work, the device must be cleaned, as even a slight blockage can block the moving mechanism. If there are frequent breakdowns of the lawn mower: an overview and solution of problems can be found by reading this article.

The lawn mower will not start

  • If the engine will not start, check the position of the choke. If the air temperature exceeds 30 ° C, you need to set the middle position;
  • With long-term operation of equipment, it is necessary to take breaks for 5 minutes to avoid overheating of the engine;
  • It is necessary to check if gasoline has hit the spark plug;
  • If the gasoline in the tank is stagnant, it is worth changing it to a new one;
  • It is necessary to check whether the filter passes air well, if necessary, rinse it;
  • You can pump fuel into the carburetor using a primer.

If the mower does not drive, the drive belt should be checked – it may be worn out and needs to be replaced.

The lawn mower is not picking up speed

The reason may be such malfunctions:

  • It is necessary to inspect the muffler – it may be clogged;
  • The grass is wrapped around the shaft and from this does not twist the knife, as shown in the photo;
  • Rust on the mechanism and parts;

If the mower does not work at full capacity, it is necessary to disassemble and clean the mechanism..

Blades not adjusted correctly

This can be seen from the uneven surface of the lawn. Unplug the mower and wear protective gloves before making adjustments..

The gap between the cylinder and the knives should be uniform in all areas and should not exceed the thickness of a sheet of office paper. Even the same paper is used to adjust the gaps. It is inserted between the cylinder and the knife, after which the drum rotates. It is necessary to adjust the knives until the paper is cut evenly at any point on the knife.

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 is working properly and for a long time. Still, sometimes unforeseen situations happen, and the device for some reason 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 ignition in the future (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.