Petrol Trimmer Does Not Develop Revs

The reasons

Trimmers are reliable and durable (provided they are properly maintained, of course). Most often, malfunctions occur due to contamination of structural elements.

If the motor of your lawn mower Will not start, and does not pick up speed, and does not reach the power you need, or suddenly stalls, a prerequisite may be:

  • Poor quality fuel (fuel mixture), the case may be in long-term storage or in non-compliance with the recipe for preparing the mixture;
  • Grass is wrapped around the shaft of the fishing line / knife;
  • Clogged air filter / muffler;
  • Carburetor imbalance.

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 clean gasoline, it’s still easier.

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

The last reason a lawn mower doesn’t work properly will require a little more familiarity 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 douse 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 fuel supply, the second is idle, 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 returned 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 as to ensure reliable engine operation at low revs. For better starting speed up the engine slightly. At the same time, make sure that the motor makes several tens of revolutions by the beginning of the movement of the knives / reel with line. If the engine starts poorly, tighten the screw a little.

After you have adjusted the first two screws, test the operation of the device 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 returned. To increase the maximum number of revolutions, the screw must be loosened, in order to decrease. on the contrary, it will be tightened. Fix the position of the screw with a nut. Test the motor again.

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 quick failure of candles, not to mention a decrease in the power and performance of the device.

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

To cut grass on a small lawn, it is not necessary to purchase an expensive and bulky lawn mower; it can be easily replaced by a gas / 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.

Little tricks

  • If you fail to tighten / loosen the adjusting screws normally, it may be because the spring is too thick and stiff. Then you can choose instead of her a more suitable.
  • If your unit requires NOT pure gasoline, but its mixture with engine oil, strictly observe the proportions specified 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 Strong carbon deposits form on the candle, Reduce the fate of the 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 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 people insist on 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. So you prolong its smooth functioning.
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You will learn more about what to do if the petrol trimmer is NOT picking up speed.

Engine problems

If everything is in order with the fuel, filters and spark plug, then the next source could be a gasoline engine. He may have the following mechanical failures:

  • Carburetor problems;
  • Engine Drive Mechanism Problems.

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

Carburetor cables

Then you need to check the operating settings of the carburetor, which must correspond to the parameters given in the instructions. If they are installed correctly, and the desired effect is present, then the part should be disassembled, rinsed, cleaned, pumped through all its gait and assembled back. The carburetor itself must be free of mechanical damage.

In the event that adjusting or replacing the carburetor does not give the desired result, it is necessary to clean the drive mechanism and lubricate the cable located inside it with oil.

Engine problems can be eliminated with your own hands if you have the required skills, but it is better to use the services of a service center for this. Its specialists will carry out a comprehensive diagnostics of the trimmer and establish the exact cause of the drop in speed.

Petrol Trimmer Does Not Develop Revs

Possible Causes of Electric Hair Problem

When using the trimmer, on which the electric motor is installed, problems with a set of revolutions also occur. But they are caused by completely different malfunctions, in comparison with fuel streamers. The electric motor does NOT develop the required rotational speed in the following cases:

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

Electric scythe brush unit

  • In case of burning of the engine windings;
  • If jamming of rotating parts occurs.

To eliminate the problem with the voltage, you need to check its value with a multimeter or tester in the outlet from which the electric power is taken. If it is less than the minimum permissible value, then to increase it, you will need to turn off all electrical appliances or install a stabilizer.

To repair the soft starter, you will need to have the appropriate knowledge in electronics, so it is better to contact a service center. There they will decide on its maintainability or the need for replacement. You can check the button yourself or find the block diagram and try to figure it out.

Soft starter block

The brushes may wear out and contact will be lost as a result, causing the motor to stall. The brushes are easy to replace. The features of the process are determined by the lawn mower used. Along the way, you will also need to clean all contacting surfaces.

If the windings are burnt, if you continue to cut grass or bushes, the electric motor will quickly burn out. This will be accompanied by the appearance of a burning smell, up to the melting of SEPARATE parts. You will need to replace the electric motor.

Wedging of rotating parts occurs for various reasons. To identify and eliminate them, you will need 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 idle, the rotation speed drops.

Shown is an algorithm of actions to identify the most common reasons why the trimmer is NOT gaining the required speed:

Why is the trimmer speed falling?

There are a number of different reasons for this common problem. While working with the device, one can encounter both obvious malfunctions, the signs of which are clearly traced, and asymptomatic cases. The first option is the most simple from the point of finding the problem. If the trimmer does NOT pick up speed, and there are no clear signs of breakdowns, then you will need to consistently check the most common cases of malfunctions, and if the cause is found, eliminate it.

Failure in the fuel circulation system

Failure to properly circulate fuel to the trimmer will also result in the mower NOT gaining speed. This can be due to the following main reasons:

  • Air leaks, which are caused by cracks in the hoses;
  • Clogging of the gasoline pump, which occurred due to the use of low-quality fuel or due to the formation of sediment at the bottom of the tank and getting it into the system;
  • Dirty muffler or catalyst.
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To troubleshoot the considered problems yourself, you need to do the following:

  • Go through the fuel pump, removing dirt;
  • Replace pipes and hoses through which fuel circulates;
  • Cleans the muffler and the mesh on it;
  • Will supply a new catalyst, which is expensive due to its precious metal content.

All work on troubleshooting the fuel circulation system can be done independently. But it should be done carefully so as not to lose details, or after assembling the braid there are NO “extra”.

Common Causes of Low RPM Lawn Mowers

The problem, when the lawn mower is NOT picking up speed, occurs mainly in gasoline units. This affects the equipment of various models, for example, Husqvarna, Champion, Stihl.

Some of the structural elements, with which problems may be associated, are available for visual inspection, and to check the functioning of the remaining units, you will need to disassemble the lawn mower.

Spark plug problems

Spark plugs become dirty and worn over time with continuous use. To check this, they are removed and inspected for carbon deposits. The problem can be eliminated in two ways: if possible, restore the old candle, or simply install a new one in its place.

In the first case, they act like this:

  • Unscrew and wipe off the fuel candle;
  • Dry it without calcination;
  • Using a File or fine sandpaper, remove carbon deposits from the candle and check the gap between the electrodes (should be 1 mm);
  • Assemble a trimmer;
  • Get a lawn mower.

If the spark plug does NOT emit a Spark after recovery manipulations at the required distance between the electrodes, then it will be necessary to check the quality of the connections of the electrical circuit elements of the device. When the wires are in complete order, you will need to unambiguously install a new part.

Replacing candles is a simple process, which is cheap, and if you can restore old ones, it is generally free. For work, you only need a candle wrench and a File.

Dirty air or fuel filter

A further common prerequisite for reduced trimmer RPM is dirty trimmer air or fuel filters. In the first case, the problem is that the fuel-air mixture entering the combustion chamber is not sufficiently saturated with oxygen, as a result, not all gasoline is burned out. This prevents the lawn mowers from developing their maximum power.

In order to check whether the air filter is really to blame, you need to remove it (after unscrewing the cover for this) and turn on the lawn mower. If it works normally, then replace the clogged filter element with a new one.

If the situation has risen after the actions taken, then you need to Pay attention to the fuel filter. The essence of the problem is similar to the previous case, only instead of a lack of oxygen, little gasoline is supplied for the normal operation of the device. This problem is also eliminated by simply replacing the filter element. Air and fuel filters are inexpensive. It is easy to change them yourself, and the whole work does NOT take much time.

Low quality fuels

The trimmer does NOT rev up when refueling with low quality fuel. For this reason, the engine may not start at all or work “jerk”, changing the speed of rotation of the knife or line.

To independently determine the quality of the gasoline used, perform the following steps.

  • Candles are removed with a special key.
  • Examine their working contacts for the presence of a red brick plaque: if there is one, then the fuel used contains significant inclusions of additives.

If a deposit is found, it is necessary to drain the fuel poured into the tank and replace it with a quality one. The lawn mower used should only be refueled with brands of gasoline, which are indicated by the manufacturers in the operating instructions. It is also imperative to clean the candles from plaque before reinstalling.

There is a wide selection of trimmers on the market from various manufacturers. They are characterized by common reasons why turnovers are falling. Also, each unit is equipped with an instruction manual. In it, the relevant section contains the necessary recommendations on this issue for the model used.

If in the process of self-troubleshooting it was not possible to achieve a positive result, then it is better to seek help from specialists. You should also involve professionals in solving the problem in the absence of minimal experience and skills in such a matter, so as not to harm. The most difficult part is the engine. Only experienced craftsmen are allowed to work with it. When the lawn mower is under warranty service, the best option is to contact the service center, where they will diagnose and repair the equipment.

In no case should you store gasoline in a plastic container from under water. When mixing the fuel mixture, a static charge builds up, you can “catch” the spark.

Therefore, at gas stations it is not allowed to fill gasoline into plastic cans, only metal ones. Before pouring gasoline into a metal canister, it is better to put it on the ground, so static is removed from the case.

But there are situations when simple manipulation of the lawn mower does NOT help. The engine will still not start. In this case, it is used to check the power supply and ignition system, guided by the rule “the engine does not work if there is nothing to burn or nothing to set on fire”.

See the trimmer instructions for the continuous running time of the lawn mower. On average, oblique 15-20 minutes, then turn off the trimmer and let it cool for 3-5 minutes. Also, the duration of continuous operation is influenced by Weather conditions. In hot weather, when mowing tall grass, thickets of weeds, under heavy load, the trimmer overheats faster.

Many problems with a lawn mower arise from improperly prepared fuel mixture. In two-stroke engines, lubrication is carried out with a special oil (not ordinary motor oil!) Mixed with gasoline. If the oil is not mixed with gasoline, the lawn mower will quickly fail. Mix the oil / gasoline in the proportion indicated in the trimmer instructions. Usually it is 1:40 or 1:50.

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The question often arises: the proportion of 1:50 is how much oil and gasoline?

In the manufacturer

The history of this German brand begins in 1926. At the initial stages of its own development, the company was engaged in the production and sale of various devices for washing and steam machines. It all started, like many companies, with a small production and a narrow focus, which made it possible to focus on the quality of products.

At the beginning of the 30s, the first STIHL chainsaw was released, which was already distinguished by its convenience and functionality at that time. The company is developing at a fast pace, constantly introducing new tools, which gives it the opportunity to enter the international market. lawn mower Stihl And already in 1931 the first constant deliveries of products to Russia were organized.

Stihl device

At the current moment, the company has expanded its activities in more than 160 countries around the world, opening new centers and production offices in Switzerland, China and many other countries. This is completely understandable, because the range of the company is impressive: motor-drills, gasoline sprayers, mowers, gasoline trimmers, chainsaws and almost everything else. I would like to note that Shtil chainsaws are very popular due to their own functionality and applicable cost.

You bought yourself a new petrol trimmer and immediately got into trouble with it. It starts very badly. If you mow a little, and then turn it off, then turning it on “hot” is an even bigger problem than “cold”. What to do with him, I don’t know how to get it right?

The instruction for the lawn mowers plant sounds like this:

Switch on ignition.

Pump up fuel with a silicone button (primer) located on the bottom of the carburetor. Pressing must be done as much (or slightly more) as written in the instructions, usually about 8-10.

Close air damper.

Lock the throttle lever with a stop button at high rpm.

Turf the starter handle 2-3 times. The engine should “grab”.

If the engine “grabs” and stalled, then you need to move the choke to the 1/2 position and try to start again. If the engine starts, then we release the gas and move the air damper to the “open” position. Getting started.

When performing manipulations on pumping fuel, do not be afraid to pour it over. If this happened, and, as they say, “filled the candle”, then you do not need to unscrew it, it is enough to move the air damper to the “open” position and, while holding full throttle, simultaneously crank the engine with a starter 2-4 times. After that, you can start the engine and get to work.

FS 130

The model belongs to professional models, so the goals set for it will be slightly higher. It is designed for cutting rough grass, tough shrubs and young trees.

It provides the latest engine with high power, and not emitting a large amount of harmful emissions.

The price for the Stihl FS 130 mower is about 400.

  • Engine power. 1.9 HP;
  • Engine volume. 36.3 cm3;
  • Tank volume. 0.53 l;
  • The bar is straight;
  • Handle. T-shaped;
  • Complete set. shoulder strap, two-blade knife;
  • Line diameter. 2.4 mm;
  • Weight. 5.9 kg.

The range of for these models does not mean any difference in quality, first of all, each Stihl mower is designed for a certain type of work.

It is clear that there is no point in purchasing a more expensive and powerful model if you have a small plot or lawn in front of the house. Simpler models will do just fine with this task, but the word “simplicity” is not used here in a derogatory manner. The more powerful mowers are designed to handle large areas with overgrown and dense surfaces, hence the price difference. If you are confused in such a variety of tools, do not be upset, but feel free to click here and we will tell you how to choose a lawn mower for a summer residence.

Model characteristics on.

However, whichever model you would NOT choose, you need to follow certain operating rules Recommended by the manufacturer in order to avoid possible damage.

You also need to remember that a piece of the cable, spun by centrifugal force when the trimmer head rotates, flies like a bullet. Imagine what would happen if it hits the leg or someone’s eye?

Using a cable, wire, or multicore cable instead of a fishing line leads to quick breakage of the trimmer. In addition, it is a direct violation of safety regulations.!

Experienced users recommend buying a line with a “star” profile. Compared to a round one, it mows much better, stalks as thick as a finger, a fishing line with a diameter of 3 mm chops into an easy one, and is less consumed.

lawn mower stalls

When purchasing a lawn mower, you need to be prepared for the fact that, as in all other similar tools, breakdowns may also appear in it, which will require repair.

But you should not immediately run to the service center and pay big money to the masters, convincing you of the presence of a severe malfunction in the device.

Also, the ignition coil may be punctured in electrical equipment. In this case, the lawn mower Will not start or will start and work intermittently, and then stalls, or on a “hot” does not start at all.

You can check the coil’s serviceability in the same way as when checking a spark: unscrew the candle, lean it against the trimmer body. If there is a spark during the jerk of the starter, or it appears every other time, the coil must be changed.