Reasons Why Gasoline Trimmer Starts And Stalls

The tool, despite its small dimensions, is a complex technical device. If you study the operating instructions, it turns out the reasons why the brushcutter does not start are known and can be eliminated. It is necessary to consistently eliminate factors that impede the launch of the tool. Usually start with more accessible nodes with easy health checks.


All the reasons why the brushcutter does not start can be classified according to the specifics of the operation of individual nodes. In the service center, malfunctions are classified:

  • engine malfunction (piston wear, bearing malfunction, crankcase crack);
  • fuel mixture failure. clogged air filter pores or carburetor malfunction;
  • the ignition system does not work;
  • mechanical failure. leakage of hoses, broken wires under the braid, tube rupture.

The user first needs to check if there is fuel in the tank. Start up in accordance with the instructions, putting the saw on its side. Set the air damper to the “closed” position, pump up fuel, turn on the ignition, and make 3-4 sharp jerks with the starter. If the engine is running, open the air damper. The brushcutter does not start. repeat the operation with a slightly open choke.

Lawn Mower cannot work long. The gearbox and engine will overheat. Mowing can be no more than 15 = 20 minutes, making a five-minute break. At sultry noon, the operating time is halved. When mowing weeds, sedge, the working time is required to be reduced.

If the launch fails, we begin to search for the cause of the failure:

  • check fuel quality;
  • make sure the candle is working and the candle channel is clean;
  • check the cleanliness of the air filter;
  • make sure the fuel filter is not clogged;
  • check the purity of the breather;
  • clean the exhaust duct.

complex causes will be found in the diagnosis of malfunctions, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear on the gasket and violation of the tightness of the internal halls with a loss of vacuum. Do-it-yourself repair of the brushcutter, if it does not start, will require patience.

Elimination of the reasons why the brushcutter does not start

The fuel mixture must be prepared with exact proportions of gasoline and oil. In this case, you can not use a different brand of fuel. To prevent the ingress of dirt, gasoline should be left in a glass or metal dish for 2 days. Do not use plastic containers to store fuel. Measure the oil accurately with a medical syringe without a needle. Use only freshly prepared mixture without leaving undeveloped fuel in the tank. If the engine is naughty, the brushcutter stalls, when you press the gas, fuel may be to blame.

Benzokosa does not start on a hot one. pull the trigger and sharply pull the cord several times until the engine starts, then lower the trigger. Does not start. requires specialized repair.

Checking the ignition system, if the brushcutter does not start, is carried out sequentially:

  • remove the removed candle from soot and dirt, dry it, set a gap of 1 mm;
  • connect to the high-voltage wire and check for a spark by pulling the starter several times;
  • if there is no spark, check the integrity of the high-voltage wire;
  • replace the candle;
  • dry the candle channel;
  • at the same time, the operation of the ignition coil is checked, it is faulty if the working candle does not spark.

It is in the event of a malfunction in the ignition coil that the brushcutter does not start up hot, stalls, works intermittently.

Cleaning or replacing the air and fuel filters will ensure the necessary flow of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If a nylon fabric is used, it is washed, the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the suction pipe open. Is it necessary to replace the air filter, you can determine if the engine with the removed air purifier starts. Whether it is necessary to change the grid on the fuel supply, if the gas trimmer does not start, a dry candle will tell.

Breather, air inlet for gas tank. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be purged with air or cleaned with a needle. Clean the exhaust channel, remove the spark silencer mesh.

Reasons Why Gasoline Trimmer Starts And Stalls

Video: Reasons Why Gasoline Trimmer Starts And Stalls

Carburettor Adjustment

The maximum and minimum engine speeds, smooth idle speed is regulated by a carburetor. The stable operation of the brushcutter depends on the amount of the supplied combustible mixture and air, their ratio. The brushcutter will not start if the carburetor is not properly adjusted. The procedure for setting up the device for supplying fuel at low revolutions (L), high revolutions (N) and idle (T) is regulated by the screws of the same name:

  1. The chainsaw should work for at least 10 minutes, since the adjustment is carried out hot.
  2. Turn screw N smoothly to maximum speed, then turn it by ¼, counterclockwise, reducing the speed of rotation of the motor shaft.
  3. Idling is regulated by screw T, ensuring that the braid does not rotate.
  4. The screw L is adjusted, first opening the throttle as much as possible, and then gradually reducing the speed to a stable minimum.

After adjustment, a working carburetor with cleaned filters, checked by ignition should ensure the operation of the engine. In the event of a malfunction of the carburetor, after repairing it, it will again be necessary to adjust the feed system before starting the brushcutter.

Rare breakdowns that interfere with the operation of the brushcutter can be:

  • rewind spring malfunction;
  • a broken or stuck starter pulley;
  • faulty starter assembly.

The most important malfunction, the elimination of which is associated with the replacement of the engine, may be the failure of the piston group of the engine. The cost of repair will cost about 70% of the cost of the product. To understand the reasons why the brushcutter does not start, the video will help:

Proper chainsaw care

In the instruction manual there are no unnecessary phrases, everything that is offered is aimed at trouble-free operation of the brushcutter. The cleaning of all parts after each cycle of work facilitates the easy removal of uncured residues and dirt. Only the cooled nodes need to be cleaned. This technique contributes to the quality of air cooling of the engine and gearbox.

For refueling, use fuel with the oil recommended in the instructions. If the fuel mixture is left in the fuel tank, the oil will pop up and, upon start-up, will land on the damper, impairing its adjustment. The mixture may precipitate and clog the fuel in the carburetor.

When preserving equipment for the winter, carry out an audit, lubricate the gearbox and piston system, wrap the entire saw in an oily rag and store in a dry place.

It is impossible, it is dangerous for the tool and the health of the mower, to use a metal cable instead of fishing line. It cuts more efficiently, but the load on the gearbox and motor increases. A worn piece of wire flies at a speed of a bullet. Effective mowing can lead to rapid wear of the engine piston group. For greater mowing efficiency, it is proposed to use an asterisk fishing line profile.

Diagnostics and elimination of causes. video

Petrol Trimmer Starts And Stalls

Why not start gas trimmer? Reasons and their elimination

Recently gas trimmer acquired the status of one of the main tools in the arsenal of summer residents. And this is not surprising, because a motorized spit allows you to quickly tidy up your personal plot. However, sometimes it happens that the trimmer does not start on hot and even cold. In such situations, you have to independently determine the cause of the malfunction. Let’s find out what to do if the trimmer does not start. The reasons that most often lead to such troubles will be discussed below.

Troubleshooting strategy

How to start troubleshooting if the trimmer does not start? In situations when the tool stalls immediately after start-up, it is worth inspecting the following units of the unit:

  • fuel tank;
  • spark plug;
  • fuel and air filter;
  • exhaust channel;
  • breather.

It is the failure of the above locations that most often leads to the fact that the trimmer does not start well. Let’s look at how to eliminate such troubles.

Fuel mixture check

Let’s say you do not start the trimmer. In this case, the first step is to check whether there is enough fuel in the tank, and also to evaluate the quality of the fuel mixture. It is necessary to refuel the motorized unit with exclusively high-quality gasoline. It is recommended to use fuel whose brand is not lower than AI-95. Filling the trimmer with fuel of an unknown origin, purchased at a non-gas station, is fraught with the occurrence of frequent malfunctions in the tool. This may cause a malfunction of the cylinder-piston system. Repair in this case often exceeds the cost of the device itself.

Why not start gas trimmer? Incorrect preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual. It is extremely not recommended to prepare the fuel mixture in large volumes, that is, for the future. After all, with long-term savings, the loss of the defining properties of the substance occurs. Therefore, if the trimmer does not start, you should drain the old fuel and use a freshly prepared fuel mixture.

Diagnosis of the suppository canal

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What to do if the used fuel mixture is in perfect order, but still not start gas trimmer? The reasons for the failure of the mechanism may lie in the excessive wetting of the candle channel. To diagnose and fix the problem, do the following:

  1. Unscrew the candle. Wipe it thoroughly and then dry it.
  2. Drain excess fuel in the chamber through the corresponding spark plug hole.
  3. Clean the old candle if there is soot on its surface. To cope with the task will allow the use of an ordinary lady’s nail file or needle file.
  4. When installing the element in place, set the gap to 1 mm. To check the parameter, just put any coin in the lumen.
  5. Reassemble the function block.
  6. Try to have a trimmer.

Drying the candle channel is recommended for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage. What to do if the function block was serviced in accordance with the above recommendations, but the trimmer does not start, is there a spark? In this case, it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It should only be slightly moistened. You should resort to such actions to ensure ignition. After all, no matter how strong the spark is from a candle, there’s simply nothing to ignite in a completely dry chamber.