Trimmer Stihl 38 Is Not Gaining Momentum

Reasons why the lawn mower does not develop momentum

There are five main reasons why the Stihl trimmer does not develop speed:

Little tricks

  • If you are unable to tighten / loosen the adjusting screws properly, it may be that the spring is too thick and stiff. Then you can choose instead of her a more suitable.
  • If your unit does not need pure gasoline, but its mixture with engine oil, strictly observe the proportions indicated in the operating instructions. There is one little thing: the recommended ratio is 1: 25 (for all brands of oil) or 1: 50 (for “native” oils). Try the first ratio first. If, with such a recipe, oil drips appear on the motor, and a strong carbon deposit forms on the candle, reduce the proportion of oil by half. This usually helps to fade traces and reduce the amount of carbon deposits.
  • To clean the spark plug electrodes from combustion products, you can use fine-grained “sandpaper”. Wipe them down with a dry cloth first and then gently sand them with sandpaper. If the space between the body of the device and the insulator is also clogged, a regular unbent paper clip can help clean it. To do this, briefly soak the candle in diesel fuel, and then scrape off the dirt. If the blockage is small, one procedure is sufficient. In case of heavy dirt, it is sometimes necessary to repeat it several times. After complete cleaning, the candle must be wiped dry from the remaining diesel fuel, and then it can be used as directed.
  • Please note that foreign-made lawn mowers (gasoline, electric or battery) require a little more maintenance than domestic ones. In particular, many strongly recommend entrusting the adjustment of the carburetor of a two-stroke engine to professionals, especially if your purchase has not expired the warranty period.
  • And finally, one more tip: follow all the manufacturer’s recommendations for the operation and maintenance of the device. This will prolong its smooth operation.

You will learn more about what to do if the petrol trimmer is not picking up speed.

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the lawn mower does not pick up speed, the cause of the malfunction and its elimination

If the candle does not emit a spark after recovery manipulations at a suitable distance between the electrodes, then it will be necessary to check the quality of the connections of the parts of the electronic circuit of the device. When the wires are in perfect order, it will come in handy to precisely install the latest part.

Changing candles is an easy process that is inexpensive, if you can return the old ones, then generally free of charge. To complete the work, only a candle wrench and a file are useful.

If there is constant high-spirited pollution and wear of the candles, then it is necessary to find the problem of these abnormal phenomena deeper.

If our client remains in order with fuel, filters and spark plugs, then the next source is possibly an internal combustion engine. He will have subsequent mechanical failures:

  • Carburetor problems;
  • Difficulty with the motor drive mechanism.

There is a small cable in the carburetor section. It can subside and lead to the dilemma in question. Therefore, when dealing with the carburetor, you should first check the condition of the cable, and if necessary, tighten it (but not to the maximum). The main thing is not to overdo it with a stretch, so that it does not crack under load.

After that, it is necessary to check the operational options of the carburetor, which are manufactured to correspond to the characteristics given in the annotation. If they are installed correctly, but there is no suitable effect, then the part should be disassembled, washed, cleaned, purged with a pump, which remains for our client to make its course and assemble it back. The carburetor itself is without mechanical damage.

If it is impossible to independently restore the performance of the carburetor, it is better to replace it with the latest part or resort to the services of experts.

If the passage, when adjusting or changing the carburetor does not give the desired result, you need to clean the drive mechanism and lubricate the cable located inside it with oil.

The problems associated with the engine can be removed on your own if you have the required abilities, alas, it is better to use the services of a service center for this purpose. His specialists will carry out a comprehensive diagnosis of the trimmer and establish the exact cause of the drop in rpm.

Disruption of normal fuel circulation on the trimmer also results in the mower not picking up speed. You will like it better for the following main reasons:

  • Air leaks caused by cracks in the hoses;
  • Clogging of the gasoline pump, which came out due to the introduction of poor fuel or due to the formation of sediment on the day of the tank and getting it into the system;
  • Muffler contamination in other words, catalyst.

Without the help of others, to eliminate the problems considered, the following must be done:

  • Go through the fuel pump, removing dirt;
  • Change tubes and hoses through which the fuel circulates;
  • Clean the muffler and the mesh;
  • Install a new catalyst, which will be expensive due to the precious metals in the personal computer.

All work to eliminate problems in the fuel circulation system is done without the help of others. However, it should be done carefully in order to hold the parts, or after assembling the braid there are no “extra”.

When operating a trimmer, where an electronic engine is installed, difficulties also occur with a set of revolutions. However, they are caused by completely different eyes problems, in comparison with fuel streamers. The electric motor does not develop the required rotation speed in this version:

  • If the voltage acting in the supply network is lower than the rated value for the electric motor by quite 10%;
  • In case of problems in the soft start system (if this unit is installed);
  • When there are obstacles with the brush assembly;

Electric scythe brush unit

In order to eliminate the problem with the voltage, you need to check its value in the outlet with a multimeter or tester, from which the power of the electric cable is required. If it is less than a small permissible value, then to increase it it is useful to turn off electrical appliances or install a stabilizer.

An indisputable condition necessary for the normal operation of the trimmer is the introduction of an extension cord with a cross-section of conductors suitable for the power of the scythe motor.

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To repair the soft start unit, it is useful to have proper knowledge in electronics, therefore it is better to contact a service center. There it will be determined by its maintainability or the need to change. Without the help of others, there is an option to check the button, as it is also called, to find the block diagram and try to figure it out here.

The brushes will of course wear out, and therefore contact will disappear, which leads to stoppages of the electric motor. The brushes are easy to replace. The process is determined by the lawn mower model used. Along the way, it will also come in handy to clean our client remains contacting surfaces.

For which the design of burning the windings is intended, if you continue to mow the grass or bush, the electric motor will quickly burn out. This will be accompanied by the appearance of a burning aroma, right up to the melting of individual parts. It will come in handy to change the electric motor.

Wedging of the rotating parts occurs for various reasons. To identify and eliminate them, it will be useful to sort out the drive unit. There are models in which the number of revolutions is automatically adjusted depending on the load, increasing with its increase. at their idle speed the rotation speed drops.

The gasoline trimmer is not gaining momentum: the reasons and features of repair

It is not necessary to purchase an expensive and bulky lawn mower to cut grass on a small lawn; it can be easily replaced by a gasoline / electric trimmer. The device of these machines is quite simple, they are easy to use and unpretentious in maintenance. But sometimes problems do happen. One of them. when the trimmer does not develop the maximum number of revolutions. will be discussed in this article.

Dirty air or fuel filter

If the lawn mower is not gaining momentum, the reasons may lie in the contamination of the filter element: air or fuel.

When the air filter becomes clogged, there is a lack of oxygen in the combustion chamber, so the fuel is not fully produced, which prevents the development of the required speed and power.

To check if the reason is the air filter, you need to remove it and turn it on. If the lawnmower is still not picking up speed, it’s not the cause. So you should check the fuel filter element. Here everything is the same, only gasoline acts as oxygen. If this filter is damaged, there will be a lack of fuel, which slows down the development of speed.

Failure in the fuel circulation system

Lack of fuel circulation in the system can also be the reason why the unit is not picking up speed. There are several options for why this happens:

  • Cracks in the hose, which causes air leaks;
  • Clogged fuel pump;
  • Clogged catalyst or muffler.

You can fix the problems yourself. For this you need:

  • Remove blockages from the fuel pump;
  • Renew hoses, pipes for fuel circulation;
  • Clean the muffler and the mesh on it;
  • Install a new catalyst.

Don’t worry if you have such problems. This does not mean at all that the unit is of poor quality. If the Patriot trimmer does not pick up speed, you can fix it yourself without going to the service.

Troubleshooting methods

The first three reasons are fairly easy to eliminate. If the matter is in the mixture, it is necessary to pour out the old fuel from the tank, prepare a new emulsion from high-quality gasoline and engine oil (if your engine requires a mixture) and pour it into the fuel tank. If the trimmer is running on pure gasoline, it’s still easier.

In the second case, it is necessary to carefully free the trimmer parts from the wound grass.

If the filter is clogged, you can try rinsing it. If this procedure does not bring any effect, replace it with a new one.

The last reason a lawn mower doesn’t work properly will require a little more knowledge and skill from you.

In order to properly adjust the carburetor for lawn mowers, a specific procedure must be followed. First, clean the air filter thoroughly. The easiest way is to rinse it (it is advisable to pour water over the filter regularly after 9-10 hours of operation).

After that, in the diagram of your trimmer, which is in the operating instructions for the device, find the adjustment screws. Usually there are three of them: the first is responsible for the fuel supply, the second is for idling, and the third is designed to limit the number of maximum engine speed.

Next, turn on the unit and wait for the engine to warm up.

Tighten the first (fuel mixture) adjusting screw slowly. Catch the moment when the motor starts to stall, and turn the propeller back 45 degrees. If you didn’t have time and the motor stalled, the screw should be turned 90 degrees. Open the throttle and watch the revs increase. Next, slowly unscrew the screw (each turn is the same 45 degrees) until the moment when, at full throttle, the engine begins to firmly give out maximum revolutions.

The second screw, as mentioned above, controls the engine idle speed. By loosening it, you decrease the number of revolutions, while twisting it, you increase it. The screw needs to be adjusted so that the motor runs reliably at low revs. For better starting, speed up the engine slightly. At the same time, make sure that the motor rotates several tens of times before starting the movement of the knives / line reel. If the engine starts poorly, tighten the screw a little.

After you have adjusted the first two screws, test the operation of the unit at maximum engine speed. If necessary, you can limit it (maximum). this will protect the motor from “boiling”. To do this, you need to tackle the third screw. Unscrew the locking nut until the adjusting screw can be safely turned. To increase the maximum number of revolutions, the screw must be loosened, to decrease. on the contrary, tighten. Fix the position of the screw with a nut. Test the motor again.

Check the position of the screws regularly. the high vibration levels of lawn mowers can cause them to move unintentionally.

Remember that carburetor adjustment is not a final procedure. During the operation of lawn mowers, you will most likely have to tinker with it more than once, because an unbalanced carburetor means both increased fuel consumption and a quick failure of the candles, not to mention a decrease in the power and performance of the device.

Spark plug problems

When the petrol trimmer is used frequently, the condition of the spark plugs must be monitored. This part is subject to wear and tear, so they need to be regularly inspected for carbon deposits.

There are two ways to solve the problem: clean an old candle from burning or purchase a new one.

In the first case, you need to unscrew and scrub with sandpaper, dry. The distance between the electrodes should be 1 mm. The trimmer is assembled and started.

In the absence of a spark between the electrodes, it is worth inspecting the quality of the connections of all circuit elements. If everything is fine in this case, then 100% need to change the candles.

Replacing them is easy and inexpensive. From tools you will need a key, file.

Important! With the frequent appearance of carbon deposits on the combustion plugs, it is worth looking for the reason a little deeper.

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Candles should be thoroughly cleaned of plaque.

Stihl trimmer does not develop speed

The modern market offers a wide range of electric and fuel-powered trimmers from different manufacturers. Equipment may malfunction. For example, insufficient RPM. Do not panic about this, since the problem of insufficient speed in lawn mowers, trimmers is quite common. There are several reasons for this.

Diagnostics and elimination of problems of electric motors

Trimmer malfunctions can be as follows:

  • Violation of insulation or cable breakage;
  • Malfunctions in the area of ​​the cutting tool;
  • Damaged socket or plug.

To deal with these breakdowns, you do not need to disassemble the entire apparatus.

In case of serious engine problems, you will have to disassemble it. To do this, you need to unscrew a few screws. Having gained access to the parts of the motor, you need to carry out the following actions:

  • Check the degree of wear of the brushes. unsuitable parts will need to be replaced with new ones;
  • Ring the motor winding. the resistance must be high;
  • Check the stator and rotor. to test the rotor winding with a multimeter, measure the resistance: large deviations from the norm indicate a malfunction, the absence of resistance on the stator winding also indicates a breakdown (the stator case is diagnosed in a similar way).

Low rp problems are common with cheap trimmers. However, with improper maintenance, this also affects hand mowers such as the Huter, Patriot 3055, Echo.

How to properly replace the spark plug?

The order of work is as follows:

  • Stop the engine and wait for it to cool down.
  • Disconnect the high voltage wire from the spark plug.
  • Unscrew the part using a special wrench.
  • Inspect the spark plug for replacement. The part changes if it is defective, heavily soiled, has a crack on the case.
  • Check the gap between the electrodes. Its size should be 0.6 mm.
  • Tighten the new spark plug inserted into the engine with a wrench.
  • Install the high-voltage wire to the center electrode of the candle.

As you can see, there is nothing super complicated in this procedure.

A new spark plug for a two-stroke internal combustion engine of a gasoline streamer is installed to replace the old part that is out of order

Immediately after winding up

    Many garden equipment owners face the problem of stopping the trimmer engine after starting it. Gasoline tool repairers are sure that the matter lies in the fuel system, or more precisely, in the carburetor. As a result of a violation of its settings, an uneven fuel supply occurs and, as a result, increased vibration and a stop of the internal combustion engine.

Trimmer ignition module

Another reason why the trimmer starts and stalls immediately is a clogged fuel valve. To restore the circulation of gasoline in the fuel system, it is enough to dismantle the valve and eliminate contamination.

  • The problem may be a malfunction of the ignition module, but with such a malfunction it is best to contact a specialized center.
  • Trimmer stalls: causes and troubleshooting was last modified: July 22nd, 2018 by

    The unit may stall immediately after starting if the carburetor is misaligned or incorrectly adjusted. this causes uneven fuel supply. The result of this is that the device vibrates distinctly. For troubleshooting, the carburetor is reconfigured, following the instructions for the mechanism.

    Also, the engine stops when the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower first started working, but then immediately stalled, then the fuel may enter the carburetor unit with some difficulty. Weakening the valve helps to resolve the issue, which ensures free circulation of the mixture in the system.

    The stoppage can also be caused by air leaks in the presence of mechanical damage to the hose (holes, cracks) that takes the fuel. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.

    Gas meter (moto mower) carburetor repair does not work does not develop speed. Loss of power

    In this case, the lawn mower will stall at idle speed. lawn mower does not develop momentum, the reason | funnydog.Tv. Misalignment or incorrect carburetor adjustment can lead to dilemmas with the power system.

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

    Incorrect adjustment of lawn mowers can be corrected by simply adjusting it in accordance with the requirements indicated in the annotation for use.

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

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

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

    over, the lawn mower can stall due to the disgusting flow of fuel into the carburetor.

    Why then does the device start, you ask?

    this consists in the fact that at first the fuel gradually runs into the carburetor and it is enough to work at increased power.

    But then it is developed and at huge speeds the engine starts to stall.

    As for the carburetor, there may also be a discrepancy in the fact that its body is very tight.

    The premise that the lawnmower stalls at high rpm
    on gas, there may also be air leaks.

    We are talking about the likely presence of a place through which air can pass during the heating of the motor.

    In addition to everything else, be sure to check the fuel inlet hose. The trimmer does not develop speed. One of the reasons. The problem may lie in the fact that it holds poorly or is generally cracked.

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

    Problems with starting the engine

    It is very important to correctly determine the cause of the failure, because otherwise we simply cannot eliminate it. If there are no extraneous sounds when trying to tune the chainsaw (knocking down, grinding, etc.)

    It often turns out that there is actually no problem at all. For example, if it is wrong to start the chainsaw and pull the plug for a long time, the engine just pours and starts very hard.

    To properly start the chain saw motor, set the lever or switch to the flap position. Then you need to pump the mixture into the carburetor, if a fuel pump is available. Pull out the starter handle until motor resistance is noticeable, and vigorously extend the amplitude by taking your hand to the side. After two. Three such motions, the engine must first start and then decay. If this does not happen, then it is necessary to move the lever to the half-throttle position or simply to the working position, and then continue the operation of the chainsaw in this mode. Many chainsaws “half-throttle” are locked automatically when pulling the choke

    Some models have key ignition, it is important to make sure it is on

    If the engine won’t start, the first thing to do is. Unscrew and check the spark plug. There are times when the plant fills the burner with fuel during the cold season. Then you also need to unscrew the candle, dry the combustion chamber with one plant, clean the spark plug, screw it in and restart. It is advisable to check for a spark immediately. On the twisted candle, we put on a cap with high voltage wire, we put it on the cylinder, and we pull the starter. Visually observe a frequent blue spark. OK. We roll the candle into place and fire it up. If there is no spark, change the spark plug and try again. Again, no. Check the high voltage wire connections to the spark plug, coil and ignition system.

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    In general, the state of the spark plug can be used to determine the type of fault.

    • Dry.
      Most likely the fuel mixture is not entering the cylinder. This is not an ignition system, so the plug is screwed in and checked.
    • Wet, heavily splashed with fuel.
      Excessive fuel mixture is due to a violation of the starting rules as described above, or if the carburetor is set incorrectly.
    • Coated with black carbon.
      This could indicate the use of poor quality oil, an incorrect carburetor setting, or an incorrectly calculated gasoline to oil ratio. The candle should be washed, cleaned of carbon deposits with a sharp object (awl or needle), wipe the electrodes with a cloth and reinsert.

    When checking the spark plug, you need to pay attention to the gap between the electrodes: the normal is considered from 0.5 to 0.65 mm. Damaged or worn gasket should be replaced

    Correctly adjusted carburetor chainsaw ensures full power efficiency with the most economical fuel consumption.

    The need for tuning the carburetor chainsaw is infrequent, since the adjustment is initially made by the manufacturer to achieve optimal operation. The adjusting screws are designed to more accurately adjust the carburetor chainsaw, if necessary.

    When and why is it needed?

    Among the reasons for the failure to fix the adjusting screws are the following:

    • Strong vibration or damage to the protective cap. It rarely happens, but it still happens.
    • Serious engine (piston) wear. Of course, in this case, it is better to take care of the repair of the chainsaw, but at the same time adjusting the carburetor can improve its functionality for some time.
    • Litter in the carburetor due to poor quality petrol or scale formation. In this case, in addition to adjusting the carburetor, it can be avoided.

    Some tricks for working with a petrol trimmer

    The summer time has come, and lawn-mowers as usual rattled on the personal plots. Great tool, powerful and mobile. With the help of a gasoline trimmer, you can cut the grass and get rid of the dried weeds. However, there are times when the lawn mower will not start, work intermittently or not at full power. There is certainly no time for work! And as they say, you pull the starter handle more than you mow.

    Launching difficulties arise not only for seasoned lawn mowers, but also for new ones. How to be in this situation? There is only one way out. to listen to the advice of experts and take advantage of their practical experience!

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    For some reason, the Stihl electric scythe does not develop its full power

    When using the electric trimmer, speed problems can also occur. The reasons here are completely different than those of fuel braids.

    You can fix problems yourself

    the trimmer does not develop the required power because:

    • The voltage in the network is below the required minimum for the device more than 10%;
    • There was a failure in the soft start (if there is such a system);
    • There is a malfunction of the brush assembly;
    • The motor winding is burnt;
    • Rotating parts sometimes jam.

    To adjust the voltage, you should first check its power. If it does not meet the standards, you should increase it with a stabilizer.

    Trimmer Stihl 38 Is Not Gaining Momentum

    Repair of the soft start system is carried out only in the service center.

    Note! When the brushes wear out, you just need to replace them. When installing new ones, it is recommended to clean all surfaces with which they come in contact.

    To adjust the voltage, you should first check the power.

    If the motor windings are burning, you need to change the electric motor.

    Jamming of rotation parts can occur for various reasons. To eliminate them, you should revise the entire drive assembly.

    Note! The latter problem may arise with another unit of this company. the Stihl secateurs, and sharpening the disc with scissors will be its solution.

    Why does the lawn mower stall after starting?

    After starting, the engine may stall if the carburetor is incorrectly tuned or misaligned. By what signs can you understand that the reason really lies in this? It is very simple, by the vibrations that will be clearly felt when the mower is operating. You can adjust the fuel supply yourself by doing everything that is written in the operating instructions for the tool.

    A clogged fuel valve can cause the engine to stall. The cause is eliminated by cleaning it. If the lawn mower starts up and then suddenly stalls, then the fuel supply to the carburetor is difficult. Loosen the carburetor valves to ensure that the correct amount of fuel can flow to it.

    If too much air is sucked in, the engine can also stall. Raise the engine speed to allow air bubbles to escape faster from the unit’s fuel system. Also, be sure to check the integrity of the fuel intake hose. If you find mechanical damage (cracks, punctures, etc.), replace the part.

    Features and best models

    The mower of the Stihl company deserves a special mention, which is distinguished by its own versatility, reliability and ease of use. The company’s specialists have created many varieties of braids, with different features and applications.

    For example, the lawn mower range is designed for mowing grass in large areas. For this, a self-propelled wheel system was developed, with the help of which it became possible to care for a large territory without spending a lot of time and effort. A lawn mower is perfect for decorating shrubs, giving them a certain artistic image and texture. Lawn Mower Does Not Develop RPM Reason And if you need a lawn mower for tall grass and uneven areas, then follow this link and get full information on the selection of this type of equipment.

    If you need a more subtle approach to trimming grass, for example near flower beds or between trees, then a gasoline trimmer designed for accuracy and precision will do just fine. The company’s specialists have foreseen all the nuances and possible difficulties when working with braids, so they equipped them with nylon strings that prevent mechanical damage to trees.

    A special AutoCut trimmer head is also used to ensure the normal functionality of the petrol trimmer string knives. This article will tell you about the of petrol hand-held lawn mowers and trimmers, it will also help you make the right purchase, which you will not regret.

    There are two types of these mowers: amateur and professional models, designed to solve problems of a certain complexity. The first category includes models FS 38, FS 45, FS 55, etc. The peculiarities and differences of these tools are in the motor power (from 0.9 to 1.2 HP, depending on the configuration) and the volume of the tank (approximately 0, 34 l).

    The professional trimmers include Stihl FS 130 and FS 250. Let’s consider the characteristics and properties using the example of several mowers, in particular FS 38, FS 70 and FS 130.

    See device features on.