What To Do If The Trimmer Won’T Start

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What To Do If The Trimmer Won'T Start

In the warm season, many summer residents and owners of private houses seek to figure out on their own 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 and the trimmer is then 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 it is possible to understand 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.

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. A 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 need to 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.

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. Replace the defective part.

  • Accumulation of debris and carbon deposits in the jet or channels. For cleaning, you can use only factory flushes or a normal stream of compressed air from the compressor. It is forbidden to use wire and sewing needles, as one wrong movement can seriously damage the flow area.
  • Loss of previous tightness. To thoroughly check this indicator, you should use a classic household tonometer, having previously installed a suitable pressure gauge. It is necessary Watch the indicators: if any fluctuations were Not Fixed, then everything is fine, but when the pressure gradually drops, then some part in the carburetor is out of order.

    • 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.

    Checking the involved 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. Preparing a mixture in large volumes is not recommended, since during long-term storage, certain properties are inevitably lost. 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.

    The petrol trimmer: what to do if the mower won’t start. 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 spark 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 plug 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.

  • The ideal state of the electrodes involved can be considered when they have a characteristic dark brown carbon deposit. If the candle has white or even black carbon deposits, or is wet, then it must be replaced immediately.
  • The trimmer may NOT respond to starting because there is too much clearance between the spark plug contacts. To set the optimal clearance, it is necessary to use special different-caliber probes.

    • 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?

    Petrol trimmer. An amazingly useful thing, with the help of which you can clean up not only a miniature lawn in the backyard of the house without unnecessary hassle, 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.

    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. Do not save on fuel, because Repair of cylinder parts. The 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 fuel 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 cover, 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 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.

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    Trimmer won’t start

    Like any technique, trimmers are subject to various breakdowns. Often at the beginning of the summer cottage, the owners of such a tool complain that the trimmer does not start, and it takes a long time to look for the cause of the malfunction.

    For those who have recently purchased a trimmer and are still “you” with this technique, it will be useful to know why the trimmer does not start and what to do in this case. So, let’s find out what may be a prerequisite for this.

    Petrol trimmer won’t start. 10 possible reasons

    Before attempting to adjust the operation of the tool yourself, carefully study the manual for its operation. Perhaps the information contained in it will push you to this or that thought. Otherwise, you will have to look for the cause of the malfunction by the selection method. It can be one of the following:

    • The toggle switch on the boom is NOT in the “On” position. This is one of the basic steps, but sometimes beginners forget to turn on the tool before launching it.
    • Lack of fuel in the tank also belongs to such errors. If you run out of fuel and you forgot about it, just fill the tank (usually located near the engine) with AI-92 gasoline.
    • Lack, improper mixture or incorrect proportion of engine oil. Ideally, you should regularly add 50 g of oil without pain. This will provide additional lubrication and keep your trimmer motor running. Also Considering that the oil is of different types (“synthetics”, “semi-synthetics”, “mineral water”). They all have a different effect on the operation of the mechanism.
    • If the trimmer mower will not start after winter, Drain the remaining fuel in the gas tank and replace it with fresh fuel. This is especially true for small, low power trimmers with small motors that are sensitive to poor quality mix. In addition, during the winter, sediment can form at the bottom of the gas tank, due to which problems arise with the operation of the device.
    • Excessive fuel pumping can also be one of the reasons that the trimmer stalled and will NOT start. When the air damper is overlapped, the candle is flooded with fuel. It should be Unscrewed and dried, and then inserted into its place and try to start the engine while holding the gas trigger. It is advisable to check it before that there is a spark between the electrodes. If there is a spark. The candle should be replaced.
    • Filter problems. If your trimmer does not start well, remove the air filter and start the tool without it. If everything worked out. The filter should be replaced with a new one. As an option. Thoroughly clean and blow out the old one, however, sooner or later you will have to make a replacement.
    • Trimmer stalled and won’t start? Try to clean the so-called breather. An element designed to equalize the pressure in the gas tank. Cleaning can be done with a regular long needle. A clogged breather is often a prerequisite for a malfunction.
    • The knives have been removed from the machines. Some models will not work under this condition.
    • Violation of tightness. You can check this with a pressure gauge. If the pressure starts to drop, you should determine which of the parts of the carburetor is faulty. Most often the carburetor gasket wears out.
    • Sometimes after a long period of operation, you will notice that the trimmer is overheated and will NOT start. First, you should know to take breaks. The amount of continuous operation time recommended for this model should be indicated in the instructions. Also, the problem of overheating may lie in a faulty ignition coil or in the air cooling system, which prevents overheating.

    If none of THESE actions work, you should contact a Repair Shop or Service Center.