Reasons for power loss in brushcutters. STIHL lawnmowers do not reach their full power
Anyone who owns a garden or a plot of land is well aware of the problems with fighting excessive vegetation. Now the grass trimmer has come to the aid, which has successfully replaced the usual scythe in this field. This unit is very convenient in operation, but he, like any mechanism, because of the difficult working conditions or incorrect operation is inherent in the breakdown. Situations when the grass trimmer does not pick up speed are quite common. To understand this problem, it is necessary to understand some aspects related to the functioning of the device.
All grass trimmers are classified by type of power supply: gasoline or electricity (mains or battery). It should be noted that gasoline mowers are superior to their electric and battery-powered counterparts in many ways. Despite the fact that they all perform similar functions, the difference in performance, maneuverability and efficiency is very noticeable. However, the general principle of operation of all types of manual mowers is almost the same. the devices are equipped with engines (two- or four-stroke engines or electric motors), which drive the cutting unit (spool with a fishing line or a metal disc). All the elements are mounted on a straight or curved boom, including the handle to control the trimmer, where the main buttons are located.
Since the problem of weak revolutions is more typical for gasoline versions of trimmers, they will be given more attention. So, the lawnmower is very comfortable to work with and unpretentious in maintenance. In this case, most of its faults are caused by the user’s ignorance of the elementary things that are written about in the manual. Therefore, before you start operating the machine, it is necessary to carefully study the manufacturer’s manual. In particular, in order to start the engine, the following sequential steps must be taken:
- turn on the ignition button;
- press the silicon button several times to pump the gasoline;
- Close the air damper;
- set the throttle lever in the high rpm position;
- First, to make a small jerk with the starter handle to feel the resistance of the engine, then yank sharply.
If the lawnmower starts, but stalls, you need to put the air damper in the middle position and try again. When the engine starts, you need to turn off the gas and open the air damper, as the grass trimmer works only on the suction.
Important! Grass trimmer operation mode depends on various environmental influences. In hot weather, the machine needs to be given more time to cool down. The engine also overheats too much when working in dense or overgrown vegetation. You need to take a five-minute break every 15-20 minutes.
Causes of weak grass trimmer revolutions
If users complain about the grass trimmer not picking up revolutions, it means that it works fine at idle, but does not develop the necessary power when pressing the gas. This can occur as a result of long periods of inactivity. These problems are typical for gasoline-driven machines, including Husqvarna 128r, STIHL FS 38 and Hitachi of different modifications.
Working with the trimmer, you need to monitor its behavior all the time. a drop in rpm and unusual noises signal malfunctions in the machine. sometimes you give throttle and grass trimmer floats. In such cases, the work should immediately suspend, let the mechanism cool down and begin to search for possible problems. They can be of a different nature, both technological plan, and external factors related to the conditions and characteristics of the operation of the machine.
External factors
Several factors that are not related to the mower’s malfunction have an influence on the decrease in the lawnmower’s RPM:
- contamination of the filter due to dirt and dust particles getting into it;
- Use of low-quality fuel;
- Incorrectly prepared mixture (relevant for trimmers with two-stroke gasoline motors);
- contamination of the muffler screen with particles of vegetation, soil and other dirt.
In the second and third cases there is the formation of carbon deposits in the combustion chamber, and the elements of the carburetor get clogged.
Technical problems
Technical problems with the lawnmower are mainly in the fuel system and the ignition system. These can be repaired with your own hands.
- When the hand-held mower won’t start or stops, the problem could be related to the spark plug. Dark soot indicates a poor carburetor adjustment and poor gasoline quality.
- A clogged fuel hose can be the cause of grass trimmer malfunctions. The filters also frequently get clogged.
- Another internal problem. the muffler is covered with soot. This causes the grass trimmer’s rpm to drop drastically. The way out is to clean the muffler.
Important! If the machine does not work because the engine is broken, it can cause serious problems. In this case, the malfunctions that can be eliminated with your own hands include only the destruction of piston rings. In case of more serious problems with the engine, if there is no warranty, you should be ready to visit a workshop.
Lawn mower stops when you press the gas, how to fix the breakdown
Reasons for stopping the lawnmower can be numerous, we offer the most common of them, and we hope that you will find yours, and, of course, fix it. So, one of the situations is clogging the air damper, the hole behind which the fuel is atomized. If something has gotten into it, it can often be quickly and easily removed. This is the easiest cause, as is a clogged filter. It should be washed in solvent and then blown well with compressed air. If it cannot be repaired, order a new one from the KosiKos store.
When the grasshopper stalls at high speeds, it’s due to the following problems:
- A clogged or jammed valve located on the gas tank lid;
- The carburetor razregulirovaniya under the influence of vibrations arising from the operation of the mechanism;
- Problems with the circulation of the fuel mixture;
- Atmospheric air inflow;
- The fuel intake hose is cracked or poorly connected.
The carburettor is adjusted according to the instruction manual for the trimmer. To adjust it, it is often sufficient to loosen the tightening of its housing. If there are problems with the circulation of the fuel mixture, it may flow into the carburetor little by little. After it is exhausted, the engine stops at high RPM.
Causes of malfunction and troubleshooting
To most accurately determine the cause of malfunction of any brand of grass trimmer (e.g., Echo) and find out the possibility of fixing it, you need to establish, when performing what action the device stalls. The engine may stall both at idle and at high rpm, after heating under load or immediately after starting, etc.д.
If the engine stalls after the gas is turned on
Owners of gasoline mowers quite often mention that the lawnmower cuts out when the gas is pressed. Usually such a breakdown occurs due to problems in the carburetor. Failure in its operation can occur due to prolonged storage, use in harsh conditions, significant engine overload. The symptom of such a breakdown will be vibrating movements of the device when working.
On a side note! Users familiar with automotive carburetor repair can try to repair this important grass trimmer assembly on their own, using the instruction manual. Otherwise, the right solution is to ask for help from the service center.
Sometimes the grass trimmer stops when you give the gas, because the fuel valve is clogged. It interferes with the gasoline supply. To fix the problem, it is enough to loosen the valves. In this way, the normal supply of fuel to the carburetor will be restored.
Reasons of malfunction and their elimination
To most accurately determine the cause of malfunction of any brand of grass trimmer (e.g., Echo) and find out the possibility of fixing it, you need to establish, when performing what action the device stalls. The engine can fail both at idling and at high RPM, after heating under load or immediately after start, etc.д.
If the mower stalls after the gas is turned on
Owners of gasoline-powered mowers quite often mention that the lawnmower stalls when the gas is pressed. This fault is usually caused by a problem with the carburetor. Failure in its operation can occur due to prolonged storage, use in harsh conditions, significant overloading of the motor. The symptom of such a breakdown will be vibrating movements of the device during operation.
A side note! Users familiar with automotive carburetor repair can try to repair this important grass trimmer component on their own, using the instruction manual. If this is not the case, the best solution is to ask for help from the service center.
Sometimes the grass trimmer stops when you give the gas, because the fuel valve is clogged. This interferes with the supply of gasoline. To eliminate the problem, it is enough to loosen the valves. Thus, the normal supply of fuel to the carburetor will be restored.
Gasoline grass trimmer STARTS AND STOPS
Why the grass trimmer gasoline does not start? Causes and their elimination
Recently, the gasoline grass trimmer has gained the status of one of the main tools in the arsenal of gardeners. And this is not surprising, because the motorized grass trimmer allows you to quickly bring the garden plot in order. However, sometimes it happens that the grass trimmer does not start when hot or even when cold. In such situations, you have to independently determine the cause of the malfunction. Let’s find out what to do if the grass trimmer does not start. The causes that most often lead to such troubles will be discussed below.
Troubleshooting strategy
With what to start troubleshooting, if the grass trimmer does not start? In situations where the tool stalls immediately after starting, it is worth inspecting the following parts of the machine:
It is the breakdown of the above-mentioned locations that most often leads to the fact that the grass trimmer starts badly. Let’s look at how to fix this kind of trouble.
Checking the fuel mixture
Let’s say your grass trimmer won’t start. In this case, the first thing to do is to check whether there is enough fuel in the tank, as well as to assess the quality of the fuel mixture. You have to fill your motorized machine only with high-quality gasoline. It is recommended to use fuel, which brand is not lower than Ai-95. Filling the trimmer for grass with fuel of unknown origin, bought not at the gas station, is fraught with the occurrence of frequent failures in the work of the tool. This can cause failure of the cylinder-piston system. Repair in such a case often exceeds the cost of the device itself.
Why the grass trimmer gasoline does not start? It can also lead to it incorrect preparation of the fuel mixture, which consists of oil and gasoline. The proportions in which these components are combined, are specified by the manufacturers in the manual of the grass trimmer. It is highly discouraged to prepare the fuel mixture in large quantities, that is, for the future. When the mixture is stored for a long time, the decisive properties of the substance are lost. Therefore, if the grass trimmer does not start, it is worth to drain the old fuel and use a freshly prepared fuel mixture.
READ What’s the Best Grass Trimmer. Rotary or Vibratory?
Diagnosis of the spark plug channel
What to do if the fuel mixture used is fine, but still does not start the grass trimmer gasoline? The causes of mechanism failure can be hidden in the excessive moisture in the candle channel. To make a diagnosis and fix the problem, you need to do the following:
- Unscrew the plug. Wipe it thoroughly and then dry it.
- Drain the excessive fuel in the chamber through the spark plug hole.
- Clean the old plug, if it has soot on its surface. Use a standard nail file or a nail file to perform the task.
- When installing the element in its place, set the gap of 1 mm. To check the parameter, it is enough to put any coin through the gap.
- Reassemble the functional unit.
- Try to start the weed trimmer.
Dry the spark plug duct for at least half an hour. However, you should by no means resort to the burning of its elements. Heat can cause irreparable damage to the spark plug. What to do if the function block has been serviced according to the above recommendations, but the grass trimmer does not start, but there is a spark? In that case it is worth treating the threaded connection with gasoline. The latter does not need to be heavily impregnated with fuel. It should only be lightly moistened. The following steps should be resorted to in order to ensure the ignition. Because no matter how strong the spark is, there is nothing to ignite in a completely dry chamber.
lawnmower stalls
Adjusting the carburetor, does not start well
,Stops when you press the gas. MY SKIP: ork.Vitek tel. 380979677418
lawn mower stops or choke when throttle is depressed
information on repair and tool selection on our website www.LookTool.Ru come on in and we’re happy for everyone.
If even in this case, the grass trimmer does not start, it is worth evaluating the quality of contact between the high-voltage wire and the spark plug. If there is no spark (if there is a reliable connection between these elements), the problem is most likely caused by a broken ignition unit. In this situation, you will need to turn to the services of craftsmen, who will perform the reinstallation of the node.
Checking the filters
Another common reason for the grass trimmer not starting is a blockage in the filter area. To confirm the conjecture, it is enough to dismantle the specified unit and try to start the unit without it. If the grass trimmer engine has started, most likely you will have to replace the air filter or at least perform a thorough purge the old one. If there is abundant contamination on the surface of the filter element, it is necessary to use a new mesh. If you do this, do not leave the suction pipe exposed to contaminants at all. After all, a rush in this case can lead to the need to repair the entire piston group of the unit’s engine.
Breather cleaning
Often the engine firm models trimmer glows as a result of clogging breather. The main task of this component is to equalize the pressure in the fuel tank. If the node is dirty, a vacuum is formed here, which makes it much more difficult to supply fuel. Cleaning the breather plug with an ordinary sewing needle can solve the problem.
Diagnose the exhaust port
A malfunction in the grass trimmer may be caused by dirt build up in the discharge chute or a clog in the muffler screen. Such a problem occurs most often during the operation of older trimmer models. The problem can be solved by removing the anti-sparking grid and cleaning it.
How to prevent the occurrence of sudden breakdowns during the operation of the grass trimmer?
To ensure that the unit is always in functional condition, it is worth following a few simple rules:
Lawn mower stalls at high engine speeds
During operation you may encounter a situation when, when you press the fuel button, the engine speed begins to decrease instead of increasing. Failure of this nature can be caused by:
Fuel hoses of a brushcutter with filter
- air blowing into the combustion chamber;
- problems with fuel mixture circulation;
- clogging of the breather plug in the fuel tank lid (cleaning the hole with a thin sewing needle)
- improper carburetor adjustment.
If there is air leakage during the operation of the engine, you need to check the tightness of pipes and the integrity of the gaskets in the cylinder head. The problem with fuel mixture circulation can be solved by removing the clogs in the fuel pipes leading to the carburetor. If there is a vacuum in the tank and the fuel mixture is not coming to the carburetor, it is enough to clean the breather plug with a fine needle and blow it with air.
the lawnmower does not develop revolutions.Another reason
the reason is very simple (watch in the video)
If, however, you have done the filter, but the work of trimmer for grass, working on gasoline, has remained the same, gasoline trimmer does not gain speed what to do?
Then you should try to remove the filter from the device in order to provide so-called “relief” of the grass trimmer. Why the Chinese lawnmower does not develop revolutions, the reason Husqvarna. It should help.
The next and pretty common problem with gasoline trimmer is that it just stops, and does not give any sign of life.
In this case, the problem may consist of the following:
The last and most common cause of gasoline grass trimmer failure is that the cable, which is located in the carburetor department, just fell off.
Therefore, make sure in advance that it is well stretched, but not to the limit, otherwise with too much load on the gasoline grass trimmer, this small cable can crack and then you will definitely have to go to a service center, and then also throw a lot of money down the drain.
the lawnmower doesn’t pick up speed.Another reason
the reason is very simple (see video)
If the performed operations with the filter you have done, but the work of the gasoline-powered grass trimmer has remained the same, the gasoline trimmer does not pick up speed what to do?
Then you should try to remove the filter from the device in order to provide the so-called “lightening” of the grass trimmer. Why the Chinese lawnmower does not develop speed, the reason Husqvarna. Should help.
The next and quite widespread problem with the gasoline trimmer is that it simply stops, and gives no sign of life.
In this case, the problem may lie in the following:
The last and most common cause of gasoline grass trimmer breakdown is that the cable, which is located in the carburetor department, just slept.
So make sure in advance that it is well strained, but not to the limit, otherwise with too much load on the gasoline grass trimmer, this small cable can crack and then you will definitely have to go to the service center, and then even throw a lot of money down the drain.
Petrol grass trimmer stops when idling
It’s not uncommon for the engine of a brushcutter to stall and not maintain idle speed when the engine starts up again. The main causes of this failure can include pollution or razregulirovaniya carburetor, as well as clogging the air filter.
Gasoline grass trimmer idling stops
If the optimal settings of the carburetor are not optimal, it is necessary to perform its cleaning and re-adjustment. A clogged grass trimmer air filter can be dealt with by placing it in a solution with an ordinary household detergent for a few hours. If self-cleaning does not cope with clogging, it is better to buy a new filter element in accordance with the instruction manual.
After carrying out measures, the user will not face the situation for a long time when the grass trimmer stalls at idle and functions only when the gas is supplied.
At high RPM
When a grasshopper stalls at high rpm, it is due to the following malfunctions:
- a clogged or stuck valve on the fuel tank lid;
- The carburetor is unadjusted due to the vibrations that occur during the operation of the mechanism;
- problems with the circulation of the fuel mixture;
- At high revs, there is atmospheric air intake;
- The hose intended for the fuel intake is cracked or loose.
The carburettor is adjusted according to the instruction manual of the trimmer. For adjustment it is often enough to loosen the tightening of its housing. If there are problems with the circulation of the fuel mixture, it may flow little by little into the carburetor. At high engine speeds, engine stalls.
Malfunctions that can cause the chain saw not to run properly
There are a number of malfunctions to consider when diagnosing, t. к. They can cause your saw to malfunction.
- Worn crankshaft bearings. If the crankshaft bearings are worn, it is inevitable that they run out on the drive shaft, to which the flywheel is attached. In this situation it is not possible to adjust the play between the handwheel and the ignition coil and this leads to an intermittent spark formation and unstable operation of the chain saw.
- Contamination of the impulse channel. The impulse line is used to make the fuel pump work, so its contamination will cause the pump to malfunction, making it impossible for the saw to operate (it will start and immediately shut down).
- Wear of the cylinder head. As a rule, with increased wear of the cylinder head there is a decrease of compression in the chainsaw engine, which will certainly affect its ability to develop revolutions.
- Fuel and air filter clogging.
When to call in a workshop
If the machine is under warranty, take it to a specialized repair shop at the first sign of malfunction. Repair is free, regardless of the nature of the damage, if it is not the fault of the owner. If there is a problem with the engine, the next best thing to do is to call in a specialist. In any case, it is the user himself who decides how serious a fault is.
To sum it up. Both gasoline and electric grass trimmers are designed for many years of reliable operation. Most of the problems described above are caused by lack of attention to your power tool. If the manufacturer’s instructions are strictly followed and regular maintenance is performed, the manual mower will run smoothly and without malfunctions.
Why the STIHL electric grasshopper does not develop its full power
RPM problems can also occur with an electric grass trimmer. The reasons are completely different from those for fuel mowers.
You can rectify the problem yourself
The electric grass 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 was a failure of the brush unit;
- the motor winding has become fried;
- rotating parts sometimes get jammed.
To adjust the voltage, you must first check its power. If it does not meet the norms, you should increase it with a stabilizer.
The softstarter can only be repaired by a service center.
brushes are worn out and need to be replaced. When installing new ones, it is advisable to clean all the surfaces they come into contact with.
To adjust the voltage, you should first check the power.
If motor windings are burned out, electric motor must be replaced.
Jamming of rotating parts can occur for a variety of reasons. To eliminate this problem you need to overhaul the entire drive unit.
The latter problem can also occur with another unit of this company, the STIHL pruner, and sharpening the disc on the scissors will be the solution.
Immediately after starting
The machine can stop right after start if the carburetor is displaced or incorrectly adjusted. It causes an uneven fuel supply. The resulting device clearly vibrates. To correct the defects the carburetor is readjusted, following the annotation to the mechanism.
In addition, the engine stops when the fuel valve is clogged. In such cases, it is quite easy to clean it. If the hedgetrimmer starts but stops right away, fuel may be having some difficulty getting into the carburetor. To solve the issue helps to loosen the valve, which allows free circulation of consistency in the system.
It could also be stopped by a leak in the fuel intake hose if there are any mechanical problems with it (holes, cracks). In this case, increase the drive speed to remove air bubbles from the system more quickly.
Where to look for the cause or where to start looking
All chainsaws are of the same design and work according to the same principle. How a chainsaw works can be found in this story. No matter what brand you buy: STIHL, Husqvarna, ECHO, Champion, Partner, Sturm, etc. Trouble manifested in the form of when the chainsaw malfunctions when you press the gas, can occur equally on expensive and high-quality tools, as well as low-priced Chinese devices. If there is a problem, it must be corrected.
A chainsaw is a system of mechanisms made up of parts. Any part in the mechanism can fail, causing partial or complete failure of the tool. If the engine still fails to start, it is not a guarantee that it is working correctly. If the engine stops when you rev up, there is a reason for the malfunction. When this fault occurs, you should first pay attention to a number of the following mechanisms of the tool:
- The gas tank. make sure there is fuel. If there is enough fuel, you should also check the serviceability of the fuel filter, the presence of a connection between the supply hose and the carburetor, as well as make sure that the breather is working
These are the main parts and mechanisms that should be checked first, if there is a malfunction when the chainsaw stops when you press the gas pedal. There are other reasons why the chainsaw engine stalls when the throttle is pulled. What else can contribute to the occurrence of this malfunction, as well as peculiarities of troubleshooting, we will find out further.