The petrol trimmer: what to do if the mower won’t start. Responsible nodes
In the warm season, many summer residents and owners of private houses strive to independently figure out why the trimmer does not start. The reasons for the malfunction of such a unit can be very different. To eliminate it, you need to understand what components this equipment consists of.
Hand starters are used to start petrol trimmers. With the help of THESE units, the crankshaft is moved. Ignition of the first portion of fuel causes the engine to start, after which the trimmer is ready for use. Well-coordinated operation of the unit is possible only if all critical components and mechanisms are functioning properly.
Situations often arise when the device simply does not start. In such a situation, you simply cannot do without high-quality diagnostics. Specialists described a special sequence of actions, thanks to which you can figure out why the lawn mower does not start when it is hot or even cold. Trimmer diagnostics consists of several fundamental steps:
- The first step is to make sure that there is fuel in the tank, and also check its quality.
- Determine the color of the installed spark plug.
- Be sure to check the performance of the air filter.
- The fuel filter is responsible for high-quality cleaning of gasoline and oil. The mixture should enter the carburetor as evenly as possible.
- Make sure the breather is in good condition.
- If all of the above options did not help correct the situation, then it remains to check the muffler.
Checking the used fuel mixture
To understand why a previously serviceable trimmer does not start, it is necessary at the very first stage to evaluate the oil and gasoline used. The unit can function properly only thanks to high-quality fuel. The brand of gasoline must match the needs of the engine. If the device runs on low quality fuel, it is fraught with frequent failures in the trimmer. If this problem is NOT resolved in a timely manner, then a total breakdown of the cylinder-piston system may occur. Elimination of such a breakdown often exceeds the cost of the unit itself.
Incorrectly prepared fuel mixture must not be poured into the mower. In the operating instructions for the device, manufacturers must indicate the exact proportions in which high-quality gasoline and mineral oil should be combined. It is not recommended to prepare a mixture in large volumes, since the loss of certain properties inevitably occurs during long-term storage. If the mower will not start, then the old fuel must be carefully drained off to be able to use the freshly prepared fuel mixture.
Carbon accumulation in the muffler
Before resorting to more serious repair actions, you must make sure that the exhaust channel is in good condition. This section does not apply to previously NOT used trims, as they are practically production comments. If the lawn mower has been in operation for many years and during this time the unit has not been subject to serious diagnostic measures, then it is imperative to check the fact that the muffler is clogged.
The accumulation of carbon deposits prevents exhaust gases from escaping, making it simply impossible to start the engine. Of course, one day the outlet can not get clogged, because of which such a situation must be preceded by certain symptoms. The exit of black smoke from the muffler is a kind of carbon deposit, which gradually accumulates on the walls of the exhaust system. A significant increase in the sound of the installed engine may occur, which is associated with overcoming the enormous resistance of the exhaust gases for their release. When operating at idle speed, the device spontaneously stalls. In critical situations, engine performance deteriorates significantly.
If there is serious dirt on the anti-spark mesh, then the reason for the impossibility of starting the trimmer engine may lie in the exhaust channel. It is necessary to clean the mesh as carefully as possible, since it is black soot that is a very dangerous carcinogen for humans, which can provoke respiratory tract damage. For cleaning, you should use specialized products that will cope with carbon deposits.
serious causes of malfunction
If, after a thorough examination of the basic trimmer assemblies, the cause of the device malfunction has not been found, then you need to carefully inspect the engine and carburetor. In this case, three key problems can be distinguished at once, which are most common:
Natural wear of the installed carburetor gasket. The only logical way out of this situation is to replace the faulty part.
If the used carburetor is in good working order, the petrol trimmer will not start due to the piston group being out of order. If during the inspection, characteristic chips, distortions or scratches were found, then the part must be replaced. Experts recommend replacing the piston rings. If a slight backlash occurs when the mounted connecting rod is rocking, then the rings must be replaced, but this procedure is best entrusted to professionals.
Reliability of built-in filters
It is these devices that often become an obstacle because of which the classic trimmer does not start. The filter provided by the manufacturers is responsible for the high-quality cleaning of the air entering the carburetor. Clogging of the cleaning unit is fraught with the fact that oxygen enters the internal compartment of the unit in a smaller amount, or its supply stops altogether. It is possible to determine the malfunction of the air filter in a fairly simple and affordable way:
- Dismantle the device and inspect it thoroughly.
- If the naked eye does NOT detect any blockages, then try starting the mower without a filter. Replace this part only if the trimmer has started successfully.
- You can use compressed air to clean the air filter. But if the cleaning device has been used for a long time, then it is more advisable to replace it.
It should be noted that the trim tabs will NOT start due to a clogged air filter in the most rare cases. Most often, this device affects the stability of the engine. The more real reason lies in a clogged fuel filter. This unit is located in the tank of the unit. If the trimmer has been used for more than two years, then it is imperative to check the filter, which may interfere with the supply of fuel to the carburetor.
If the user is sure that the main problem lies in the fuel cleaning element, then the following steps should be taken:
- Remove the filter carefully.
- Try to start a lawn mower.
If the device starts up quickly enough, then the problem lies precisely in the fuel filter.
Long-term storage of fuel in the used tool tank, as well as accidental ingress of small debris and dust into the trimmer tank can significantly reduce the service life of this unit. But if the filter is OK and the mower still won’t start, then the fuel hose should be checked. Often there are situations when the hose together with the filter are disconnected from the main pipe, which necessarily leads to the impossibility of starting the engine.
Spark plug performance
If it becomes necessary to figure out why the trimmer does not start, then you should check the condition of the contacts of the installed plug. In this case, you can understand why the lawn mower engine does not start. For a high-quality spark plug diagnosis, you must adhere to the following scheme:
If during dismantling it was found that the candle is wet, then a certain part of the fuel is present in the small combustion chamber, which does not need to be rushed to get rid of. To fix the problem, it is necessary to dry and thoroughly clean the contacts. After the done manipulations, you should carefully connect the candle. You need to turn on the ignition and, without any extra effort, turf the starter handle. If the device is working properly, then there will be a constant and bright spark. Otherwise, you will have to replace the candle.
Since the petrol trimmer common today belongs to the category of effective and complex devices, it is imperative to study the attached instructions before using such a unit. Many users ignore the manufacturer’s recommendations. But sooner or later it becomes necessary to figure out why the trimmer does not start. In this situation, experts recommend diagnosing the device.
Preventive measures
In order for the purchased trimmer to always be in good condition, it is necessary to use and store this unit as correctly as possible. Manufacturers recommend carefully following a few basic rules:
- Fill lawn mowers with only high quality fuel.
- Regularly and in a timely manner conducts technical inspection and adjustment of the main mechanical elements of the device.
- Try to avoid severe overloading of the trimmer during operation.
- After each use, check the lawnmower for carbon deposits and specific oxides on the surface of the ignition system mechanisms.
In order for the trimmer to always be in working order, you need to prepare it as much as possible for storage in the cold season. The first step is to disassemble the unit in stages, and then perform a full cleaning and careful washing of the component parts. Carefully inspect the multifunctional units for any damage. If necessary, eliminate deformation of parts.
To store the lawn mowers, fill the gearbox with sufficient oil. It is imperative to clean the air filter, you can also disassemble and wash the engine of the device. All mechanisms are thoroughly dried, and the moving mechanisms are lubricated with a quality product. To process the piston system, first remove the spark plug. The piston is carefully moved to the extreme position in order to be able to pour a small amount of oil into the plug hole and make the crankshaft smoothly scroll.
Problem with starter and ignition switch
The battery may be charged and the high voltage wires are OK, but you still will NOT be able to start the engine. Then the cause of the malfunction should be looked for in the ignition switch or starter.
To check if the ignition switch is working properly, insert the key into the ignition lock and turn it to the second position. If the red lights on the dashboard do not light up, then the ignition switch may be faulty. You can check in the second way. At the time of an attempt to start the engine, turn on the headlights, if they start to fade, then the ignition is in working order. A malfunction of the ignition switch is eliminated in most cases by replacing the switch.
Corrosion and dirt damage Not only the wires on the battery, but also the starter. You will need a tester and assistant to test the starter’s performance. An electrical tester is connected to the wire that powers the car’s starter. At this point, the assistant should try to start the engine. If the tester shows that there is electric current on the wire, but the starter does not crank, then this problem can be solved by replacing the starter. Attention! Do not forget about safety measures, and do not touch wires and other parts of the engine with bare hands. It is best to carry out this procedure with dielectric gloves.
There are times when the starter turns, the car will not start. What to do in this situation? To answer the difficult and trivial question of why the car won’t start, you need to check other components of the car. Lack of spark is another option why the engine refuses to start. Checking the spark plugs should worry you in the last place, first you need to deal with the ignition coil.
Ignition
So, if all of the above is in good condition, check the ignition. First you need to test the ignition coil. She is checked with a multimeter. If there is no such device, then you can call the nearest car service.
It happens that moisture accumulates in the ignition distribution cover, this can become a prerequisite for which the engine does not start. The cover must be removed and checked for moisture. Any moisture or condensation that appears must be removed with a dry cloth. Once you had to remove the cover, you should check it for cracks. A cracked cover should be replaced with a new one.
The wires to the ignition coil can be damaged or an electric shock. Tester Bring to the insulation of the wires. Serviceable wires will not conduct current through the insulation. If the tester showed that the wires are faulty, you will have to buy new ones.
Timing problems
Timing is responsible for engine operation in the car. Sometimes a metal chain is installed instead of a belt. Both are responsible for the rotation of the crankshaft and camshaft.
When using a car, every part wears out over time. Timing belt. Not an exception. Under constant load, it wears off and can break. Such a violation will lead to damage to the engine valves, and in the future to its breakdown. And here a problem arises: the starter turns, the car will not start. What to do? A complete timing repair or replacement of a valve belt can be quite expensive. Therefore, so that such a problem does not happen, it is advisable to change the belt every 2 years (this is about 60,000 km of run).
It is not worth delaying the replacement if you do not want to harm your beloved car. The replacement of the belt is provided by professionals so as not to stretch.
Spark plug
Candles are intended for ignition of fuel-air mixtures. They are found in different types: spark, incandescent, semiconductor and others. If your car won’t start, then a long rotation of the starter will lead to filling the candles. After which they will need to be changed. Otherwise, working with filled with candles will harm the second parts of your car.
The engine does NOT start in frost
Starting a car in Severe Frost is difficult, but not hopeless. If the temperature outside is 15 ° C and below, then any battery loses 50% of its power, this is another problem why the car does not start well. To “wake up” the car, you must turn on the high beam for 10-15 seconds. This will allow the electrolyte in the battery to warm up for additional energy.
Attention! Under no circumstances is the starter cool for more than 5 seconds. Otherwise, there is a chance that the battery will completely drain or fill the candles, which is unacceptable at low temperatures. If the car is in good condition, then from the 2-3rd attempt everything will work out, and your car will start.
It happens that the battery runs out completely. This can be understood if the car stalls and does NOT start. In this case, you will need a cigarette lighter. If an injection engine is installed in the car, it will be more difficult to “light” because of the large amount of electronics. You can “light up” from the second car even when the engine is running. The main thing is not to confuse polarity and sequence. However, if you made a mistake and mixed up the signs, run quickly for a new battery.
After connecting to the “donor machine”, you need to wait 10-15 minutes for your battery to charge. After. we disconnect from the car and try to start. If the engine is running, give it a couple of minutes, otherwise it will stall.
Remember that starting the engine in subzero temperatures equals 500 km. Take care of your car.
No compression
Does the car start and stall, or won’t it start at all? This may be the case if there is no compression in the engine. Compression in an engine refers to the ability to hold the pressure that is created in the combustion chamber as the piston rises to CCD. Compression is measured with a special device. a compressometer. Whether you need such a diagnosis can be determined by external signs. Blue smoke from the exhaust pipe, unstable engine operation or idle speed do not stand still. These are all reasons for poor compression. Such an engine will consume more oil and fuel. If you put your hand on the exhaust pipe and small drops of oil remain on your hand, then this is another symptom of engine malfunction. It is best to consult a specialist. After all, a burned-out piston may serve as a prerequisite.
Voltage problems
A common problem when starting the engine is low or no voltage. First of all, you need to check the fuses. Not every car depends on the safety system to start the engine, but it is still worth doing.
Over time, any wire connections to the battery can oxidize or become dirty. This will cause the current to not flow. Clean the battery terminals and wire connections with a dry cloth or sandpaper. Then try to start the car again.
If the terminals and wires are in order, then it is worth checking the battery. A dead battery is a common problem. You can check the battery charge with a tester or by external signs. In order to check the performance of the battery, insert the key into the ignition switch and try to start the engine. “Low torque” starter. A clear sign that the battery is DISCHARGED.
There are several ways to fix the problem with a discharged battery. Light a cigarette from the second car or try to start the car from a tug. The second method is only suitable for cars with a manual transmission. If the car does not start, you will have to remove the battery and charge it. Do not forget that the battery life is no more than 5 years.
The car will not start: Possible causes and remedies
Nowadays, a car is not a luxury, but a means of transportation. Every driver faced a problem when his “iron horse” refused to go. This is the most unpleasant situation due to which you can be late for work, miss a vacation with friends or other important event. So what if the car won’t start? For starters, do not panic, many problems can be solved on your own and without visiting a car service. So, if the car does not start, you need to look for the reasons under the hood.
Fuel system problems
Car won’t start? Is the starter motor running at full power, but the engine will still NOT start? Then the problem should be looked for in the fuel supply. Electronic fuel delivery is often used on modern cars. The problem is that it will be difficult to diagnose on your own. Diagnostic equipment is expensive and you need to go to a car service. But there are signs by which you can understand what kind of malfunction in the fuel system, so you can save money on diagnostics.
The very first thing you should do is check all electrical wires under the hood. It will take a lot of time, but it’s better than spending a lot of money for diagnostics. Each injector that supplies fuel to the system has its own separate wire. Check all wires with a tester, and also pay attention to the insulation.
Car won’t start? The cause of the malfunction when starting the engine may be in the operation of the fuel pump. You can check its performance only on special equipment, which not every driver has. You can try to find out the reason by checking the voltage on the positive wire of the fuel pump. It may be missing due to a faulty fuse. If the fuse is serviceable, and there is voltage in the wire, then this problem can be solved by replacing the fuel pump motor relay.
A good fuel pump does NOT mean that the fuel system is good. The filter can be forgotten and did not supply fuel. To prevent this from happening, it should be changed every 20,000 km. You can replace all these parts yourself. Why won’t the car start if the entire fuel system is in good working order? DO NOT despair and look for the problem further.
Petrol trimmer won’t 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. Do 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 trimmers.
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 needs to be carefully Unscrewed and make sure there is a 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 runs 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 lawn mower stalled in the opening of the lid, then you just need to start it as expected according to the instructions.
Trimmer Will not start after winter
How to be in such a situation? Do NOT 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, the lawn mower starts 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.
Trimmer won’t start. Why?
A petrol trimmer is a surprisingly useful thing that can be used to tidy up not only a miniature lawn in the backyard of the house, but also mow a lawn of considerable size. But, like all things in this world, he has the property of a rebellion of salesmen. 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 trying to start the trimmer, it starts, but immediately stalls, then the air filter may again serve as a prerequisite 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 mowers to a service center.
Fuel system
Since we started with fuel, let’s go over the fuel supply system. The reason for not starting may be the grid of the fuel pump (it can simply be forgotten, and in the winter time it will also freeze if there is water in the tank, it also needs to be disposed of). The fuel pump itself may fail.
How to start a car from a Pusher
You need to: turn on the ignition, squeeze the clutch and start tugs or push the car (preferably at least 10 km / h). Engage second gear and release the clutch. The car will jerk and start. Depress the clutch again and put the gearbox in neutral. Thank your rescuers and DO NOT jam the car!
If the reason is a dead battery due to forgotten switched on electrical appliances, then after driving for 15-20 minutes it will be enough for the battery to charge again and it was enough for the next engine start.
And if you could not start because of the starter, then we advise you to go to the service station and DO NOT jam the car, otherwise you will have to start again with outside help.
Good luck on the road and keep an eye on the technical condition of your friend.
What to do if starting the engine is difficult or impossible
- Also, a stalling or silent, as well as a sneezing engine may indicate a poor condition of the spark plugs, Unscrew and check them visually. if they are wet and if they are heavily clogged with smoke, clean if necessary, or better replace them with new ones. Also, candles can be a prerequisite for the fact that the engine starts and immediately stalls.
- Also, among the possible reasons for a non-working engine, there can be clogging of the fuel system or injectors, in view of which the fuel simply does not enter the combustion chamber. Often this problem can arise after more than one hundred thousandth run.
- A funny and sad at the same time a prerequisite for the impossibility of starting a car can be ordinary rodents. mice, hamsters, rats, they are simply able to gnaw through any very important wire, which will cause your car to be silent or constantly stall even if you can start the engine
- Additionally, poor compression can be a prerequisite for a NOT working motor. Compression is the ability of the engine of the machine to maintain a certain level of pressure in the combustion chamber at the highest position of the piston. The compression ratio or pressure is set by the vehicle manufacturer.
- Sometimes a silent engine may also be evidence of a broken timing belt. the timing belt of the machine. If so, then most likely your valve is bent. In this case, you definitely will not start the car and it is worth preparing for an overhaul of the engine.
- Just in case, check all vehicle fuses for damage, burnout, and open circuit. If such an element is identified, replace it with a known good
- Rarely, but nevertheless it happens that the ignition lock itself is technically faulty where you insert the key, with this kind of breakdown, accordingly, you will not be able to start the car
If you have gone through all the methods described here, and your car has not started, then it makes sense to contact the specialists or call a tow truck so that your vehicle will be transported to the service station whichever you specify. All this, of course, will be associated with financial costs.
In principle, we considered the main reasons why the car does not start, if you have something to add DOES NOT forget to describe it in the comments under the article
Conclusions or what to do?
As you can see, of all the possible options, you can even get to the service yourself only in the first cases considered. If you twist the starter, and the car does not start, then most likely (if you are NOT an auto mechanic) you will have to call for help.
If the starter does not work for you or the battery has simply “sat down”, and the car is on a manual transmission, you can start it from the “Pusher”. To do this, you need help from passers-by or a second car.
Under no circumstances try to start the car from the Pusher on an automatic transmission! This will only break her.
Compression
This is already the most difficult case. Everyone knows that an internal combustion engine operates at a pressure of burnt gases. if there is pressure, then it will not work.
All this is controlled by compression. this is the maximum air pressure in the combustion chamber, which is reached at the moment the piston is at top dead center, on also compression. Measured in atmospheres, the normal parameter is about 9-11 ATM.
If your car does not start, you checked everything, and came to compression, and it can be said to be zero, then this indicates two situations:
- Burnt pistons or compression and oil scraper rings.
This happens from low-quality gasoline, or from an incorrectly set ignition. Or the use of gas engine fuel (often, the gas supply system uses its own equipment and it also needs to be configured correctly).
If you have no compression, then most likely the engine will not start. It is necessary to disassemble the power unit and see if the valve is not so scary, but if the pistons, then they can also run out of block walls, and this is already expensive.
Well, at the very end, I want to say in the ECU (electronic control unit), you can say this is the brain of a modern car. It happens that it completely breaks down, and then you can’t, it cannot start the car, but it will be generally lifeless (because now it can even control the radio).
BUT the failure may be partial, for example, some path has burned out. That is, some system will not work. But with such damage, the CHECK ENGINE will most likely light up.
Now is the version of the article, look.
, From my experience, starting problems can mainly be due to fuel, battery, starter, timing and sensors. So this should be watched first.
I finish here, I tried to put it “on the shelves” in a simple and understandable language, now you will at least know where to look. This concludes, sincerely your AUTOBLOGGER.
The car won’t start. reasons
There are several common reasons why a car engine may not start. Divide them into two groups according to the problem: problems with the electrical equipment or the fuel system of the car. Let’s omit the banal one, like the fact that the driver forgot to call in to the gas station, and the car was left without fuel. here everything is clear. The reasons we describe are more serious, and then in order to rectify the situation, you will have to make some efforts.
Electrical problems
The most common reason a car won’t start after turning the ignition key is a dead battery. The charge in it could disappear due to a decrease in the capacity of the electrolyte, which occurs due to the natural aging of the battery. Corrosion of the contact terminals or broken wires leading from the battery to electrical appliances is another reason that it cannot perform its functions, which makes it impossible to start the car. If the battery is new or by the end of its service life it is still far away, it is serviceable, but DISCHARGED, then there may be several reasons. a) malfunction of the generator supplying the battery with electricity, b) energy overrun by one of the consumers (for example, by an alarm), b) an electrical appliance turned off at night (headlights, dimensions, radio tape recorder, air conditioning, etc.).
Second The most common reason a car won’t start is starter failure. There are several reasons for sinning on the starter in this case: the elements of the contact group of the ignition lock could fail, the anchor of the retractor relay could be seized, or there was a short circuit between the turns in the winding of the traction relay.
Car starter
Another reason is a short or open circuit to ground of the ignition circuit, as well as corrosion or damage to the contact terminals and wires.
The third reason why it is NOT possible to start the car engine is the blown fuses responsible for the proper operation of all elements of the ignition system.
This is what a blown fuse looks like (the jumper shown by the arrow)
The fourth reason is a malfunction of the car ignition switch. In it, the cylinder larvae may wear out or the cylinder itself may jam, as a result of which the ignition system stops turning on and off.
The fifth reason is the incorrect operation of the ignition coil. If the car does not start, then the problems can be explained by a short circuit in the coil, damage or complete breakage of its wire.
In checking the ignition coil read here
In addition, droplets of moisture can serve as a prerequisite for a malfunction of the ignition coil, which accumulate under the cover of the ignition distributor. distributor (such a breakdown is typical for engines with a carburetor).
Fuel system problems
In addition to problems with electrical equipment, a variety of malfunctions in the fuel supply system can serve as a prerequisite for the fact that the car does not start after turning the key in the ignition lock. It is possible to determine that in troubles with an unstaged car it is the fuel system that should be considered, given that after the ignition is turned on, the starter turns, and the engine stubbornly remains silent.
First of all, you need to Pay attention to the integrity of the wires that supply electricity to the elements of the fuel injection system. Here, various troubles can happen to the wires: loss of insulation, corrosion on the terminals, breakage and other damage. Any of these aspects can serve as a prerequisite that the car cannot be started.
Secondly, the reason may lie in a malfunction of the fuel pump. In this unit, the discharge or suction branch pipes that perform the same functions of the valve, any other parts of the pump. its relays, fuses can fail.
Removing the fuel pump
Third, if the engine won’t start, it makes sense to check the fuel filter. This is a rather rare reason, which can appear when low-quality fuel was poured into the tank and the filter cells are clogged, which made it difficult to supply fuel from the gas tank to the engine cylinders.
Internal fuel filter
It also happens that the engine does not start when a new fuel filter is installed in it. This is an oversight of the installers, which may appear if, after installing the filter, they forgot to pump out air from it. In this case, the on-board computer of the car diagnoses the formation of an airlock in the fuel system and turns off the engine.
The starter turns, but the car does not start
You turn the key and hear the starter, but the engine will NOT start. This means the battery and starter are working properly.
If you keep cranking the engine for a long time, then the battery will eventually be discharged and will need to be recharged.
There are several reasons for this type of no start condition. The most common of which is NOT fuel supply from the fuel tank. I assume there is fuel in the tank, you need to go through a series of tests to determine what is causing the problem.
The testing procedure requires the use of specialized equipment in order to identify the problem area. There are three main tests in order to determine the correct direction for troubleshooting. You will need to check the spark plugs, fuel supply and compression in that order.
For whatever reason the car won’t start. The car will not start. Very detailed about the starter as well as other reasons
I am often asked to do a review article. why the car may not start, both in summer (in a warm period) and in winter (in cold weather). There can be a lot of reasons, today I will try to describe them in detail in a simple and accessible language. I also want to make a reservation that I will talk about the injection option, nevertheless, the carburetor has long outlived its usefulness and is very rare on our roads. As usual, there will be a version at the end, so we read and see if it will be useful.
Friends, at first I would like to note. as usual, there are commonplace reasons, but there are serious malfunctions that you yourself (especially if you are a novice driver) cannot fix. I will break everything down into several points, from simple to complex. WELL that we are not going to pull let’s go.
Option number 4. problem with the carburetor
Many owners disassemble the carburetor at the first problems with starting the lawn mowers. We recommend that you first check if the problem is in the fuel supply, and also exclude more simple breakdowns, above.
To check, draw 3-5 ml of a mixture of gasoline and oil into a syringe, Unscrew the spark plug and pour fuel directly into the combustion chamber.
Install and connect the spark plug, and then try starting the trimmer 6-8 times. If the engine starts and soon stalled, the problem is really in the fuel system (carburetor, fuel filter, gasoline supply pipes). This often happens after winter, especially if the gasoline mixture is not drained: it breaks up into fractions, heavy oils literally seal up small holes and parts.
If direct refueling of the engine did not help the start, return to the ignition check, and also Make sure that the combustion chamber is tight, there is compression, and the piston group is in good working order.
Having determined that the problem is with the carburetor, disconnect it from the body. To do this, remove the air filter and Unscrew 2 or 4 long bolts. Disconnect the 2 fuel pipes as well as the throttle cable. Remove the carburetor, do not lose the paronite gasket between it and the engine.
To disassemble the carburetor, Unscrew the 4 bolts located around the fuel pre-priming button. Carefully disassemble and fold all the layers in order so as NOT to lose anything. You can immediately soak them in a gasoline bath for cleaning.
Assess the condition of the gaskets, if necessary, buy a repair kit and replace them.
On a metal plate with a round recess there is a needle on a spring-lever. She is on the verge of a circle and is responsible for the fuel supply. To check if it is stuck, if it moves, press the opposite end of the spring lever, in the center of the circle. If mobility is limited. Use special fluid and compressed air for flushing, or just gasoline.
In addition to the needle, an inlet spray valve is located on the same part. It is best seen from the back of the part. a hole in the center, often cruciform. To check if the valve is working, attach a flexible thin tube, rubber or silicone, to it and try to blow in both directions. Air should only pass on inhalation. here is the concave side of the part to the flat.
If air does not pass, cleaning is needed. A simple way is with a match, not a toothpick and NOT a needle, only a blunt end, from the side of the hole. A more complex and reliable option is with disassembly. After unscrewing the small screw next to the needle, pull it out and the spring.
In the center of the circle, find a small hole and gently, with a blunt object, for example, a cut wire, push the spray membrane out of the valve through the hole on the opposite side.
After thoroughly washing out with gasoline, blew and dry all the parts, put the membrane and the needle with the spring in place.
Reassemble the carburetor in reverse order: rubber gasket, transparent gasket, metal part with needle and valve, thin rubber membrane, thick membrane in a plastic case, primer button.
Screw to the trimmer body through the gasket, Connect the fuel pipes and throttle cable. Try starting your lawn mower as usual. If the problem is resolved, remember to reinstall the air filter.
Most likely, you will need to adjust the parameters of the fuel mixture using the adjusting screw on the carburetor. Start the trimmer and, occasionally throttle, tighten the screw to the position in which the engine is gaining maximum speed (by ear). Then do half a turn back to avoid overloading the motor.
Option # 2. filters need to be replaced
If there is a spark, but the streamer does not start, the problem is most likely in the fuel supply. The easiest way to check the air and fuel filter is to start with this.
It is quite easy to test their condition. Take off the filter elements and try to start the engine. If it works, you need a replacement or at least cleaning.
The fuel filter is located directly in the tank, at the end of the fuel supply pipe. Perform the following operations:
The air filter often becomes a prerequisite for unstable operation, floating speed, but with severe clogging it can prevent it from starting. It is located on the side, above the carburetor (fuel pre-pumping button).
The plastic cover snaps into place. Remove it. The filter itself usually consists of 2 layers: thick dense foam rubber and a flat rigid mesh. If it looks dirty or the engine only starts without it, replace the cleaner or blow it out with compressed air.
On average, it is recommended to replace both filters with a new one every 2 years.
Other instrument malfunctions
If all of the problems described above are checked and corrected, and the trimmer still does not start, there is probably a problem with the engine itself. Compression can be reduced in it due to the destruction of the crankshaft oil seals or damage to the piston group.
This often happens with trimmers, which are used very actively or for a long time: for example, in utilities. For diagnostics Use a compressometer.
In most cases, such repairs should be entrusted to a workshop, if only because in almost all Mirrors access to the oil seals and the cylinder you need to Unscrew the nuts with a thread lock. This can be done either by an Electric Wrench, or by thoroughly warming them.
The oil seals are located on both sides of the crankshaft: under the starter and on the drive, and it is better to change them in pairs. When you get to the place of their installation, assess the condition by eye: they should sit tightly, without backlash and DO NOT bulge, not be cracked. Oil leaks around also indicate the need to replace the oil seals.
When reassembling, be sure to use thread retainers wherever they have been. this is a safety issue.
The restoration of the piston group requires a specialized tool. If you are NOT a car mechanic at a service station, entrust the restoration of the trimmer motor to a specialist.
When opening the cylinder, all surfaces are checked for chips, scoring, and scratches. To determine if the piston rings are worn, wiggle the connecting rod. The slightest piston play indicates the need to replace the rings.
Maintenance and prevention of startup problems
Keep the instrument clean and regularly serviced to ensure that the instrument lasts longer and does NOT cause problems.
DO NOT store the filled lawnmower: leaving it for more than 2 weeks, and even more so for the winter, Drain the remaining fuel from the tank, then Start the engine and let it run until it stalls. Leaving the tool for the winter in the shed, apply the motor and knives with an oiled rag.
To lubricate the 2-stroke motor prior to storage, Unscrew the spark plug and lift the piston to the very top with the starter. Put some engine oil from the syringe and turn the crankshaft several times with the starter.
In the spring, before the first implementation after downtime, it is advisable to check the plug and filters, disassemble and wash the carburetor, even if there are problems with starting comments.
Option number 1. a problem in the ignition system
The first thing that falls on suspicion is that the spark plug does NOT produce a spark, and therefore the fuel mixture does NOT ignite. Most often the problem is in the candle itself.
To check, Unscrew the spark plug from the cylinder, having previously disconnected the wire from it.
A thin layer of brown carbon deposits indicates normal engine operation, red or pink carbon deposits. an abundance of additives in the fuel, change the gas station. If the element is covered with black or white scale, the motor did not work correctly.
A wet candle indicates overflow, excessive priming of fuel. In this case, the candle must be dried, but not ignited. Pour excess gasoline from the cylinder, turned over to the lawn mower.
Contacts Dried candles should be cleaned of carbon deposits using needle files, sandpaper or a lady’s file. The gap between them should be 0.7. 1 mm. this is the thickness of a standard coin. Adjust the top electrode if necessary.
Before assembling, it is worth checking the performance of the candle. Connect it to the power supply (put on the cap), attach the body to the cylinder or any metal part of the engine, turn on the ignition, pull the starter. At the end, between the electrodes, with each jerk, a bright, powerful spark should slip.
It is very important to comply with safety precautions. There should not be a drop of gasoline on the neck of the plug hole and the lawn mower body when checking!
If, after drying, cleaning and setting the gap, there is a spark. buy a new candle. It happens that a spark does NOT appear on a new candle either. In this case, check the quality of the contacts, try to replace the armored wires. it’s inexpensive and simple.
If a spark is available with the new manual, a new ignition coil must be purchased. It happens that the cable is not disconnected from the coil, they are sold only as an assembly. It is somewhat more difficult to replace it on your own, because you need to accurately set a clearance of 0.25. 0.4 mm to the starter flywheel.
Install a spool with a spacer, example. Rotate the starter: it should touch the spacer, but rotate completely. Remove paper tape or plastic and finally assemble the knot.
It happens that when checked, the spark plug gives out a small but stable spark, but the launch does not occur. After you screw the spark plug into the cylinder, a weak spark may disappear in an enclosed space. In such a situation, it is also worth replacing the coil: the new one will give out a more powerful impulse.
Why the trimmer won’t start: the causes of the malfunction and how to fix them
It’s time to mow your lawn and your lawn mower isn’t working? It’s even scary to imagine how you can keep your lawn in perfect condition with a hand tool, especially when you have NOT had to do this before. If the trimmer won’t start, the reasons can be very different, but you can fix most of them yourself.
This does not require any special tool or highly specialized knowledge. A little courage and free time to read this material. and the trimmer will not need to be taken to the master.
In this article, we will tell you how to determine what exactly is interfering with the launch, give instructions on how to repair each node and recommendations on how to avoid problems in the future. For clarity, photos and are waiting for you. Where the most common breakdowns are clearly disassembled.
Option number 3. clogged breather and muffler
The breather is a check valve that allows air to enter the gas tank, but does not allow fuel to go outside. It is located most often on the lid, but sometimes on the body of the gas tank.
When it becomes clogged, the tank becomes sealed, a vacuum is created inside and the power of the carburetor valve is not enough to suck in fuel.
The following symptoms indicate a malfunction:
- The trimmer starts normally for the first time, but after a short period of time it stalls and does not start again.
- External breather hole clogged with dirt.
- The scythe works fine if the gas tank cap is not fully tightened.
- If you disconnect and point down the fuel supply pipe from the carburetor, gasoline drips from it in a thin stream or does not flow at all.
The problem is solved simply: the hole on the outside is cleaned with a needle, slightly pressing the valve inward, and blown out with a compressor. If this does not help, you can pick it out of the cover along with the rubber seal.
Flush with clean gasoline both rubber parts and built-in filter. Blow out everything, dry it and put it back together. If after that it is not possible to blow air through the breather, buy a new cover.
The muffler or exhaust port is located on the opposite side from the carburetor. On older models, it is often clogged with soot, carbon deposits. As a result, the engine suffocates from exhaust gases and cannot be started or almost instantly stalls after starting.
The problem lies in the anti-spark grid for the engine exhaust. It can be cleaned with a needle or removed completely.
Common causes of breakdowns
The first step is to make sure of the simplest things: the availability and quality of fuel, the correct procedure.
Use only fuels and lubricants recommended by the manufacturer. Gasoline with too high an octane number is sometimes no less harmful than 80th. Instructions NOT saved? AI-95 can be called universal from a car refueling with a good reputation.
Fill only with suitable engine oil. The vast majority of gasoline trim tabs have a 2-stroke engine, so regular automotive oil cannot be used. For a 4-stroke engine, oil is filled separately from fuel. over, it is not worth pouring “working off”. used, second-hand oil.
Exactly observe the proportions of mixing gasoline and engine oil, and do not pour “by eye”. For most mowers, a 1:25 ratio is recommended, i.E. 40 ml of oil for every liter of gasoline.
A lot of mixture is not ready at once: ideally it should be worked out in 1 day and the equipment should be stored with a dry tank. The maximum shelf life of the ready-made mixture is 2 weeks, so it makes sense to mix more than 2 liters at a time, except for communal services cutting city lawns.
If you have not used the scythe for a long time, and it contains gasoline, it is better to pour it out. The mixture has already divided into fractions and lost its properties, even the most thorough mixing will NOT save it.
After making sure that the gas tank is tidy, try a scythe. For this you need:
- Pump fuel into the carburetor with the primer button 5-6 times.
- Close air damper.
- Turn on the ignition on the handle.
- Turf by the cord 1-7 times, before starting.
- After 5.10 seconds, disable the startup system.
After a standstill, if you cannot start the engine normally, try opening the throttle and pulling the gas trigger. Don’t release the trigger, pull the cord.
Also, with the throttle handle clamped, it is recommended to start the engine if it has NOT cooled down yet after the previous working cycle.
If the engine does not start for 5-7 jerks, it is worth looking for a breakdown.
Conclusions and useful
For clarity, we offer with an analysis of common problems:
To check the carburetor or if you decide to change the oil seal yourself, this is useful:
Dismantling and cleaning the carburetor is described in some detail here:
If your lawn mower won’t start, don’t rush to look for a technician to repair it. It is quite possible to independently find and eliminate the cause will not only be much cheaper, but also faster and easier.
Most of the trimmers are almost identical, the structure of small parts and, of course, the quality of their execution may differ. Use and store your tools with care, I do not spare money for fuel and lubricants and time for minimal maintenance, and the trimmer will become a reliable assistant for many years.
Have you ever faced a situation when the lawn mower stopped starting? How did you fix the situation? Share your opinion and experience in the comments below!