Trimmer Does Not Start

Main reasons

As practice shows, gasoline trimmers stop starting or function normally after winter, that is, long-term seasonal storage. Before further attempts to run the tool, thorough diagnostics should be performed to determine the source of the problem. At the moment, there are several most common causes of malfunction.

  • Initially, it is necessary to check the quality of the fuel. Saving in such cases can have extremely negative consequences. Experienced lawn mower owners and experts advise preparing a mixture, the volume of which will correspond to the forthcoming work, since its surplus quickly loses its qualities.
  • Trimmers of such famous brands as, for example, Husgvarna, Makita, Stihl, are very sensitive to the fuel used. It is about the quality of the fuel and the octane number. Providing suitable operating conditions and extending the service life of equipment will allow refueling with high-quality gasoline.
  • At the moment of starting the engine of the lawn mower, it may stall due to the fact that it fills the spark plug. Often in such situations you have to deal with the need to adjust the carburetor. It is worth noting that similar problems arise when the braid stops getting hot.
  • Sometimes the tool cannot be started, although the plug is wet, which in turn indicates that the fuel mixture has entered the combustion chamber. As a rule, this is one of the symptoms that there is no spark. The reasons may be the lack of normal contact between the spark plugs and the high-voltage wire, or drying out of the threaded connection in the spark plug channel.
  • If there are no problems with the spark, and at the same time the candle itself remains dry, then most often this indicates that gasoline is not being pumped. There may be several reasons for this situation. We are talking, in particular, about the condition of the fuel filter and carburetor.
  • The internal combustion engine of the streamer does not start or immediately after starting it stops working, which may be due to clogging of the air filter, which prevents the normal supply of air necessary to enrich the mixture.

Trimmer Does Not Start

Gasoline trimmer won’t start: causes and remedies

  1. Diagnostic features
  2. Main reasons
  3. Ways to eliminate breakage
  4. Recommendations for use

Given the specifics of using gasoline trimmers, their owners often have to deal with certain problems. One of the most common troubles is that the lawn mower won’t start or gain momentum. For the fastest and most effective elimination of such a problem, you should have an idea of ​​the main causes of possible malfunctions.

Diagnostic features

From a technical point of view, trimmers can be classified as complex devices. Based on this, before using them, it is strongly recommended to carefully study the corresponding instructions. However, in practice, many ignore it, often later find themselves in situations where the gasoline trimmer does not start or picks up poorly during operation. It should be noted that similar problems can be encountered when acquiring new models of equipment.

The key to effective and prompt repair will, of course, be a competent diagnosis of the device. In the process of troubleshooting, you will have to inspect and test, first of all, key elements. The list of these includes candles, a tank, filter units and fuel system valves. As practice shows, very often malfunctions of these elements become the reason that the lawn mower does not start. The quality and correctness of the preparation of the fuel mixture deserves special attention, especially when it comes to two-stroke engines. With regard to this parameter, the manufacturer’s recommendations should be strictly followed in order to avoid serious breakdowns and expensive repair work. In the case, for example, with a piston group of internal combustion engines, costs can be up to 70 percent of the cost of new technology.

Often, trimmer owners have to deal with situations where the specified mixture is of high quality, the carburetor is in good working order and configured, and the device still does not show signs of life when trying to start the engine. In such cases, you should check the condition of the candle. The following steps will troubleshoot the problem:

  1. Turn out the candle;
  2. Wipe and dry the part (annealing is undesirable);
  3. Remove fuel and dry the candle channel for 30–40 minutes; such actions will avoid flooding the candle at the next start-up attempt;
  4. Completely eliminate traces of carbon deposits using a file or sandpaper;
  5. Set the appropriate gap;
  6. Put the candle in place.

If the candle turns out to be working and the seat is completely dry, and the scythe engine does not start, then the thread should be moistened with gasoline. It is worth remembering that, regardless of the quality of the spark, initially in a completely dry chamber, there is simply nothing to ignite. Faced with the fact that the spark does not come, it is worth paying attention to checking the contact between the high-voltage wiring and the spark plugs. If this connection turns out to be of good quality, then it will be necessary to check the performance of the ignition system control unit. In such cases, it is unlikely that it will be possible to do without the services of a qualified specialist.

The next step in diagnosing a gasoline spit will be to check the condition of the filters. Often, the lawn mower does not start well or does not start at all on a cold one due to the clogged air filter. You can identify this malfunction by excluding it from the system. If after that the braid starts up, then you will have to clean or change this element. Experienced users strongly recommend periodically purging the air filter to maximize its useful life.

The described tool may also fail to start due to problems with the supply of gasoline caused by a dirty fuel filter. To quickly and effectively eliminate such a breakdown, you just need to replace the filter element with a new one. It is important to remember that the suction inlet must be equipped with a filter, as provided by all instructions. Failure to comply with these rules and recommendations can lead to expensive piston repairs. In the process of diagnosing and searching for the source of problems with starting the mower, attention should be paid to the breather, which is responsible for stabilizing the pressure equalization in the fuel tank. In addition, it is necessary to check the cleanliness of the exhaust port and the muffler mesh. As a rule, such problems are most often encountered when troubleshooting old models.

Ways to eliminate breakage

It’s no secret that the best and most effective repair method is to prevent possible malfunctions. As already noted, one of the key points is how correctly the gasoline-oil mixture is prepared. Its components must be at least AI-92 gasoline and high-quality motor oil. The proportions for which the mixture is prepared are indicated in the manufacturer’s manual included with any gasoline trimmer. As a rule, oil is added to gasoline using an ordinary medical syringe. In this way, the easiest way is to maintain the appropriate proportions.

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Quite often, if problems arise with starting the lawn mowers, the owners of the tool try to carry out repairs with their own hands. With the necessary knowledge and skills, this approach will significantly reduce operating costs. First of all, it is worth checking the fuel system and, in particular, the filter element. If a blockage is found, the easiest way is to replace the filter with a new one. If the air filter has become the source of problems, then you can get out of a difficult situation even during operation with little time. You will need to do the following:

  1. Remove the filter element;
  2. Directly in working conditions, you can wash the filter with the used gasoline;
  3. When operating a scythe at home or at a summer cottage, water and simple detergents are used for cleaning;
  4. After washing, the part is thoroughly rinsed and dried;
  5. A completely dry filter should be lubricated with engine oil;
  6. Excess lubricant is removed by squeezing the filter element with your hands;
  7. The cleaned part is put in place and the plastic cover is fixed with screws.

If the described actions do not provide a positive result, then the next step is to adjust the idle speed using the appropriate carburetor screw. Many publications ands posted on the World Wide Web are devoted to this topic. When trying to solve the problems in question, there are several steps you can take.

  1. The trimmer is placed on the side so that the “air” is on top. This will allow the fuel mixture to flow to the bottom of the carburetor. Often, attempts to start the internal combustion engine are successful if you first dismantle the mentioned part and literally send a couple of drops of gasoline directly to the carburetor itself.
  2. If, after all the described actions, the scythe did not work out, then attention should be paid to the state of the candle and, in particular, the presence of a spark. In parallel, all fuel is completely removed from the combustion chamber.
  3. Often, lawn mower owners find themselves in situations where the fuel and air filters are clean, the candles are in good order, the fuel mixture is fresh and of high quality, but the internal combustion engine does not show signs of life. In such cases, experienced specialists recommend using a universal and proven method of launching many years of practice. It is necessary to move the air damper to the closed position and pull the starter handle once. After that, the damper opens and the engine is started 2-3 times. In the vast majority of cases, the result is positive.

The spark plug can be flooded with fuel during the start of the trimmer ICE. Even with a high-quality mixture and a good spark, starting the device is unlikely to work. The most effective way out is to remove the candle and dry it. In parallel, you can check this spare part for operability, if any faults are detected, replace it. This procedure includes a number of simple steps, namely:

  1. Turn off the device and wait for the power unit to cool completely;
  2. Disconnect the wire;
  3. Remove the candle itself;
  4. Inspect the dismantled part;
  5. Make sure there is a gap (0.6 mm);
  6. Screw in a new, working plug and tighten it.

In practice, many repair work related to the fact that the scythe has stopped starting up and which sooner or later one has to deal with during the operation of a household lawn mower, it is quite possible to cope independently. But in case of serious malfunctions, it would be most rational to contact a specialized service. However, the key factor in such cases will be the ratio of the repair cost to the price of a new trimmer.

Recommendations for use

The stability of the operation of any lawn mowers and the absence of problems with starting the power unit of such devices directly depend on the conditions in which the tool is used and the quality of maintenance. And we are talking about the following basic rules:

  • In the process of work, it is necessary to pay special attention to the cooling system and other elements; it is strongly recommended to timely and efficiently clean the channels located on the scythe body and the ribs of the starter;
  • In the process of processing various elements, solvents, gasoline, kerosene and other effective means can be used;
  • These works should be carried out after the power unit has completely cooled down;
  • It is necessary to fully comply with all the rules specified in the relevant instructions drawn up by the developers of the described tool, which will avoid overloads in a warm engine, which in turn is the most common cause of serious damage;
  • All remaining fuel in the internal combustion engine should be completely drained before long breaks in the operation of the streamer; it should be borne in mind that the gasoline-oil mixture decomposes rather quickly into the so-called heavy fractions, which inevitably clog the carburetor;
  • After removing the fuel, it is required to start the engine and let it run on XX until it stalls itself; in this way, the remaining mixture will be completely removed from the internal combustion engine.

Particular attention should be paid to preparing the instrument for long-term seasonal storage. This should be done in order to minimize the risk of problems with starting the engine. Competent preparation includes the following manipulations:

  1. Completely disassemble the trimmer;
  2. Thoroughly rinse and clean all elements to which there is access;
  3. Inspect the parts of the lawn mowers in order to identify defects (mechanical damage found in this case should be eliminated);
  4. Pour engine oil into the gearbox;
  5. Carry out high-quality cleaning from clogging of the air filter element;
  6. Having the appropriate knowledge and practical skills, it is possible to perform partial disassembly of the power plant, followed by purging and lubrication of the moving elements;
  7. Wrap the assembled gasoline braid with a pre-oiled rag.

In addition to everything already listed, it is necessary to lubricate the piston group. This algorithm provides for the following simple manipulations:

  1. Remove the candle;
  2. Transfer the piston to top dead center (TDC) with a starter;
  3. Pour a small amount of engine oil into the cylinder;
  4. Crank the crankshaft several times.

Regardless of the cost and brand of equipment, you should clearly follow all the requirements of the relevant instructions and adhere to the recommendations of developers and experienced specialists. Today, detailed information regarding the correct use of such equipment can be easily found on many specialized sites and forums.

Next, see how to determine and eliminate the reason why the gasoline trimmer does not start.

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.

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 ​​grade. 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.

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It is necessary to take into account one more fact that with a long storage of a diluted fuel mixture, its working qualities drop, 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 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.

The lawn mower will not start, the spark is gone

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 the 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 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, the new saw does not start, and the running around the service centers begins, in such cases it is recommended:

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

Causes of malfunctioning lawn mowers:

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

The lawn mower starts and stalls. What to do?

1. There is a spark, and everything seems to be normal, but the 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 lawn mower starts up, the reason is in the air filter, replace it.

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 is necessary to start it 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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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 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 won’t start well

So what to do 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 Stihl and Husqvarna brands are unlikely to start on fuel quality lower than AI-92. You shouldn’t 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 lawnmower 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 starts and stalls

If, when trying 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 lawn mower to a service center.

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

Repair and service of garden equipment.

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

Why the lawn mower won’t start. Troubleshooting

Caring for the backyard 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.

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Since the gasoline trimmer is a complex device, you must carefully study 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 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 to the summer resident, to eliminate the reasons.

Additional checks

So, if these methods did not help, then you should check the following nodes and devices. The first step after the main check is to check the crankshaft position sensor.

It can give incorrect signals to the electronic control unit of the car, and it will no longer be able to give the correct command to injectors and other actuators, the car engine will not start. Like any other sensor, this one can get 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 third thing to watch when the car won’t start is the fuel line pressure regulator. As the name implies, it regulates the pressure in the pipes through which the fuel flows in the injectors.

The fourth explanation, due to which a heated car engine may not start, is that the idle speed regulator 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. They are the ones who conduct electric current to the candles, which ignite the fuel mixture in gasoline engines. You can visually identify a faulty high pressure wire. If on your wire high pressure there are cuts, torn places and other damage, then such a wire is best replaced.

If damage is found on one wire, then it is best to change all the wires at once. This must be done because most often the wires are installed at the same time, and if one of the wires becomes unusable, the rest 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 a little about the car’s device. If it was found that the malfunction is in this particular system, then it should be replaced immediately.

Troubleshooting

All the reasons, why not starts up lawn mower, can be systematized according to the specifics of the work of individual units. In the service center, malfunctions are systematized:

  • Motor malfunction (piston wear, bearing malfunction, crankcase crack);
  • Malfunction of the fuel consistency supply. Clogged pores air filter either carburetor malfunction;
  • The ignition system does not work;
  • Malfunction of the mechanical nature. Leaking hoses, broken wires under the braid, ruptured pipes.

The lawn mower cannot work for a long time. The gearbox and engine will overheat. Mowing can be done in less than 15 = 20 minutes, taking a five-minute break. On a hot afternoon, the operating time is halved. When mowing weeds, sedges, the working time must be reduced.

If the launch fails, we begin to find the reason for the failure:

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

complex reasons will be found during the diagnosis of malfunctions leading to 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 a loss of vacuum. Do-it-yourself lawn mowers repair, if it won’t start, will take patience.

Eliminating the reasons why the lawn mower won’t start

The fuel mixture must be prepared with the exact proportions of gasoline and oil. In this case, you cannot use another brand of fuel. To exclude the ingress of dirt, gasoline should settle in glass or metal containers for 2 days. Do not use plastic utensils for storing fuel. It is necessary to eliminate the reasons one by one, the lawn mower does not start on a hot Benzotrimmer. Measure oil accurately with a medical syringe without a needle. Use only freshly prepared mixture, do not leave unused fuel in the tank. If the engine is naughty, the lawn mower stalls, when you press the gas, the fuel may be to blame.

Electric trimmer vibrates

Many mower users have noticed that some time after the start of the machine, it begins to vibrate strongly.

On some trimmers, mostly in more expensive models, an anti-vibration system is installed in the form of shock absorbers located between the engine and the boom. 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 absence of lubrication on a rigid or flexible shaft located inside the apparatus rod.

Rigid shaft lubrication is changed as follows:

  • Unscrew the gearbox located at the bottom of the rod;
  • After removing the gearbox, you will see the end of the shaft, which must be pulled to remove the part;
  • After removing the shaft, it must be abundantly lubricated with special grease “Shrus-4” or the usual one. “Litol-24”;
  • Apply a small amount of grease to the shaft and smear it evenly along the entire length of the part, including the splines at the ends of the rod (if they work, the shaft will have to be replaced);
  • After lubrication, insert the shaft back into the rod and put the gearbox in its original place.

The flexible shaft is lubricated as follows:

  • Unscrew and remove the mowing head;
  • Remove the rod from the electric motor by unscrewing a couple of bolts;
  • Pull the flexible cable out of the rod;
  • Lubricate the cable with grease along the entire length.

This is done like this: 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, you should apply lubricant to the part and distribute it evenly over the surface. Then insert the flexible shaft rod into the electric motor and secure it.

In the case when the lubrication did not help, and vibration continues to appear, you will need to change the flexible shaft.

Adjustment and tuning of the carburetor

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

After adjustment, a serviceable carburetor with cleaned filters and a checked ignition must ensure the engine is running. In the event of a carburetor malfunction, after repairing it, you will need to adjust the feed system again before starting the lawn mower.

  • Rewind spring failure;
  • Broken or stuck starter pulley;
  • Faulty starter assembly.

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