Grass trimmer Stops at idle speed Cause
Grass trimmer, which has a gasoline drive. it is a useful thing for owners of homesteads, lawns, and when the grass trimmer suddenly stops, the work of clearing the area of grass stops. The device itself is a fairly complex mechanism, so there are many different causes of its failure. The most common malfunctions are contained in the instruction manual. Know the reasons why the grass trimmer stalls, it is necessary to effectively perform the repair of the device yourself.
Problems with the chain saw that are associated with the fact that this device does not start, are classified in a certain way by service specialists. They distinguish malfunctions with the following nodes of the mechanism:
- engine, in which the piston and bearings can wear out or fail, crack the crankcase;
- The fuel supply system, with possible filter clogging or carburetor problems;
- mechanical damage to the wires, tubes, hoses;
- the ignition circuit.
To correctly determine the node, where the breakdown occurred, it is necessary to pay attention to the circumstances under which the grass trimmer stalls.
READ Lawnmower won’t start Causes Video
The gasoline grasshopper does not start the cold
It is not advisable to press the gas when starting a cold engine. Tilting the brush so that the air filter is on top, press the fuel intake button 5-6 times, set the function lever to the “start” position, pull the starter cord several times to start the engine. After a few seconds of engine operation, turn off the starter system.
Gasoline does not start hot
If the hedge trimmer has been running recently and has not yet cooled down, but does not want to start, pull the gas trigger, pull the starter cord several times sharply until the engine starts, and only then release the gas trigger. If much time has passed and the brush has cooled down, it should be started as if it were cold. If the above methods did not help, the cleaner does not start, you should contact the service center.
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Gasoline grass trimmer. Useful thing for owners of homesteads, lawns, and when the grass trimmer suddenly jams, the work of cleaning the area from the grass stops. The device itself is quite a complex mechanism, so there are many different reasons for its failure. The most common problems can be found in the instruction manual. Know the reasons why you should be able to effectively repair the grass trimmers kiosk device itself.
Lawn mower stops when you press the gas
Lawn mower throttle key
As practice shows, in most cases, the cause of engine stoppage is the carburetor razregulation, associated with long-term storage or operation of the tool in an aggressive environment (temperature fluctuations, high humidity, dustiness), high loads or wear of individual parts. The characteristic signs of the need to adjust the carburetor can include increased vibration. If you have experience in repairing the fuel system of gasoline engines, you can eliminate the problem without any problems, otherwise you can read the detailed instructions on carburetor tuning.
The hole in the fuel cap (breather) of the grass trimmer
The second of the possible reasons why the grass trimmer stalls when you press the gas is a clogged hole in the fuel cap (breather). If small particles of dust, grass and sand residues get into it, a vacuum is created in the gas tank, as a result of which the fuel stops flowing into the carburetor. You can clean the breather of the gasoline trimmer with an ordinary sewing needle and then blow it out with compressed air. Specialists recommend cleaning the breather plug once every few mowing operations. If the cover cannot be cleaned, it must be replaced.
Lawnmower fuel valve
With a similar problem, you should pay attention to the fuel valve, which when clogged stops to pass the fuel mixture normally. The way to solve this problem is to loosen it with a suitable tool. In addition, the problem with the circulation of the fuel mixture can be hidden in the contamination of the valve. Just blow it through a stream of compressed air.
Grass trimmer malfunctions
Grass trimmer is a convenient and affordable replacement for a lawnmower. Its cutting part is made in the form of a fishing line, knives or disc, mounted on a drum, which is covered from above by a protective cover. The grass trimmer is based on a height-adjustable rod, equipped with a handy handle and a shoulder strap at the end.
Like any other technique, the trimmer for grass can break down unexpectedly, and in order not to break down to the final failure of the tool, we suggest you familiarize yourself with this article. The unit can break down for various reasons. Breakdowns occur in new trimmers, as well as in those that have long been in use.
Failure of electric models
Causes of sudden disconnection of the electric lawnmower are associated with a broken cord or lack of current. In the first case, it is advisable to check the cable for breaks. To replace the power cord, you must unplug it from the outlet, open and disassemble the breaker cover.
Before unscrewing the cable clamp strip? it is necessary to remember the scheme of its connection to the switch. To loosen the cord, use a hexagon socket (1mm diameter). The clamp is released, the conductors are removed. To check the cable for breakage, a multimeter is used. If necessary, install a new cord. In this case, the opposite sequence is followed.
In the second case, it is recommended to connect another device to the mains. Electrical apparatus may not work if the fuse in the plug is damaged. To carry out repair work, the fork must be disassembled. Use a screwdriver and a tester for this.
Motor malfunctions are caused by overheating of the lawnmower:
In the first case, it is recommended to wait a few minutes for the motor to cool. In the second case, it will be necessary to remove the jammed object. The efficiency of the cooling system depends on the condition of the air filter.
Dirty device has poor air flow, which contributes to the shutdown of the machine. Experts advise cleaning and changing the filter once every 3 months (if the lawnmower is constantly used).
If the electric motor breaks down, there is a corresponding smell and noise. In this case you will need to replace the drive.
Motor vibration at idle, on a cold or warm engine: possible causes
At a glance, the reasons for the appearance of internal combustion engine vibration are many, ranging from torn pads (supports) of the engine and ending with ignition skips and tripping of the power unit. For a more accurate determination, first look at one or the other of the symptoms.
The fact that vibration may be permanent (regardless of warm-up and loads on the unit), and appear in a certain mode of operation (idle or high RPM, when cold or hot). engine vibration may occur when the engine is cold, but as it warms up, it completely disappears. Let’s look into it.
- For example, if the engine has recently been disassembled for repair (possibly overhaul), then there is a high probability that the crankshaft was not properly balanced after reassembly. The result is runout and increased vibration.
- We should also note that after the repair of the engine to the imbalance and vibrations may lead to different weight, which have details of the cylinder-piston group. The greater the difference in weight, the greater the vibration. For this reason, experienced craftsmen weigh the pistons, pins, etc. before assembly.д.
- the engine often vibrates when the engine is at idle speed, i.e. one or more cylinders are out of gear or malfunctioning for some reason. As a rule, elimination of the cause of the TNT automatically eliminates the vibrations of the propulsion system.
- Do not forget that a timing belt or chain, incorrectly aligned with the marks, also causes vibrations.Reason. the engine does not run smoothly because of a disturbance in timing.
- Many engines have special balancing shafts in their design, which are necessary in order to “damp” the vibrations. Obviously, problems with these shafts will lead to increased engine vibration.
Engine mounts are one of the most common causes of engine vibration. In fact, it is a damper, made of rubber on many cars to absorb vibrations. As you know, over time, rubber dries out and cracks, loses its properties as a result of technical fluids, etc.д. The main thing is that an engine with a damaged cushion can not run smoothly.
- If you’ve recently switched from one car to another, keep in mind that different engines may differ in their vibration performance. The number of cylinders, layout and a number of other features affect the level of vibration. In simple words, a normal inline 6-cylinder engine can run with less vibration than a 4-cylinder and, even more so, a 3-cylinder engine. In this case we are not talking about malfunctions, as for a particular engine a certain level of vibration can be considered the norm.
- To reduce vibrations, many engines have a torsional vibration damper on the crankshaft. If there are problems with the element, the engine will start to vibrate more.
As you can see, at the initial stage, it is important to accurately determine the cause of increased vibration. For example, in most cases it is sufficient to replace the engine mount or to solve the problem that causes the engine to stall. However, it also happens that the power unit itself needs to be disassembled and repaired.
Repair of mechanical mowers is conducted at blunted or damaged cutting elements. In this case, experts recommend dismantling the removable blades themselves. To sharpen them, an emery is used. The battery is replaced in battery-powered models if necessary.
Before repairing the lawnmower, the type of motor is determined:
The structure of the lawnmower carburetor
The base of the lawnmower carburetor is a duralumin housing. If the grass trimmer does not pick up speed, the lawnmower should idle. It contains a diffuser (an opening with internal circuits). Through this hole the air is injected. Oxygen (air) flow rate depends on the diffuser cross-section (orifice).
The diffuser is equipped with fuel channels. Fuel is sucked out of them with the help of an air stream.
Why the Chinese lawn mower does not rev?
Adjusting the carburetor of a Chinese lawnmower :.
Fuel is sucked into the carburetor system by the pump (its diaphragm). Then passes through the nozzle in the carburetor. Why does the lawnmower or lawnmower stall when pushing on the run. when it picks up. The fluid then moves through the inlet and outlet valves of the pump. Is filtered by a strainer. Through the needle valve moves into the diaphragm chamber.
- Air supply tube with air baffle (flap). Baffle plate controls the intensity of the air flow.
- The fuel system is necessarily narrowed by a diffuser to increase the flow rate.
- Gasoline flows through the float chamber and restrictor tube. The float chamber regulates the temporary volume of gasoline. In the float chamber, the pressure level is neutral, but in the tube with a constriction already low. The lawnmower is its idle speed, its from the ground.It has a very slow RPM. The differential pressure causes the fuel to flow through the nozzle.
- The acceleration of the air flow promotes the transfer of fuel (gasoline) and its atomization. The result is an air-fuel mixture of the desired proportion or density.
- The air-fuel mixture enters the engine cylinder through the fuel tube.
The area of the open air damper affects the level of air density in the system. The wider the choke is open, the higher the fuel consumption and power.
Simply put, adjusting the carburetor on a chainsaw is about creating an optimal fuel mixture by correcting the air supply.
Why does the injector engine stall?
The direct injection system is more complex than the carburettor system. Therefore, if the replacement of the sensors does not give results, it is better to apply in a car repair shop. The cause may be insufficient tightness of the intake manifold. Check vacuum hoses, nozzle seals, gaskets, vacuum booster, manifold plugs. The place of air drain can be easily determined with a smoke generator. It is for sure available at the service station. It is also necessary to check the pressure in the fuel rail.
In systems equipped with a pressure regulator, the best indicator is 2.5 atmospheres in idle mode. Systems with pressure regulator in the tank should have a pressure of about 4 atmospheres. Also check the ignition system and spark plugs.
Why doesn’t the engine idle??
If the engine won’t hold idle doesn’t mean the car can’t be repaired. Such a problem is often encountered by drivers of different car brands, from old “Zhiguli” to modern foreign-made cars. The engine can stall, running at idle rpm, for no apparent reason.
Even if the car after that began to work normally, as if nothing ever happened, then such a problem must be solved urgently. There may be many reasons for such engine behavior. Let’s consider the main of such causes.
Why the engine does not hold rpm at idle?
If the engine does not keep idle rpm, it does not mean that the car can not be repaired. Such a problem is often encountered by drivers of different car brands, from old “Zhiguli” to modern foreign-made cars. The engine may stutter, running at idling speed, for no apparent reason.
Even if the car then began to operate normally, as if nothing has happened, such a problem must be solved immediately. There may be many reasons for such engine behavior. Let’s consider the main of such causes.
The engine takes a long time to start and immediately stops
It often happens that the engine does not decelerate when you release the throttle, or vice versa, stops at idle speed. Most of such situations are related to the fact that the throttle valve of a car engine is defective, that is, it is jammed or clogged.
Such situation can be caused by long term driving on bad gasoline, which is plentiful in our country, as well as by dirty air sucked into the engine through the filter.
To identify the cause, you need to pay attention to permanent pollution of the oil catcher in the crankcase ventilation system of the engine, because over time, it will certainly get dirty. If it is clogged with dirt, the engine suffocates with crankcase gases, as a result the idle speed drops and the engine stops. That is why you should periodically clean the crankcase ventilation filter.
The engine starts for a long time and immediately stops
It often happens that the engine does not decelerate when you release the gas, or on the contrary, stops at idle rpm. Most of these situations are related to the fact that the throttle of the car engine is faulty, that is, it is jammed or clogged.
This situation can occur due to long driving on bad gasoline, which is enough in our country, as well as from dirty air sucked into the engine through the filter.
To identify the cause, you need to pay attention to the constant contamination of the oil catcher in the crankcase ventilation system of the motor, because over time it will definitely get dirty. If it is clogged with dirt, the engine suffocates with crankcase gases, as a result the idle speed drops and the engine stops. Therefore, it is necessary to periodically flush the crankcase ventilation filter.
Reasons for the engine stalling at idle
Usually, when an engine does not idle, it is always due to contaminated parts or some malfunction. The main causes of engine stoppage may be:
- Contamination of the engine crankcase ventilation system.
- Failure of air sensor, throttle valve.
- Contamination of the filters, the gasoline pump.
- Clogging of injector, carburetor channels, throttle valve.
- Plugged idle speed nozzle.
- Breakage of idle speed regulator.
Electric grass trimmer vibrates
Many mower users have noticed that after a while after the start of the machine, it begins to vibrate strongly. Some trimmers, mostly more expensive models, have an anti-vibration system in the form of shock absorbers placed between the engine and the boom. But in some cases even it does not save from strong vibrations. The reason that there is a strong vibration in the trimmer can be little or no grease on the hard or flexible shaft, which is located inside the boom of the device.
Changing the lubrication of the hard shaft is as follows:
- Unscrew the reducer at the bottom of the shaft;
- after removing the gearbox, you will see the end of the shaft, which you must pull to remove the part;
- After removing the shaft, it should be generously lubricated with a special grease “Shruz-4” or conventional. “Lithol-24”;
- apply a small amount of grease to the shaft and spread it evenly over the entire length of the part, including the splines on the ends of the rod (if they are worn out, the shaft will have to be replaced)
- After lubrication, insert the shaft back into the boom and put the gearbox back in its original position.
Lubricate the flexible shaft as follows:
- unscrew and remove the mowing head;
- remove the rod from the motor by loosening a couple of bolts;
- Pull the flexible shaft out of the shaft;
- grease the entire length of the cable.
This is done as follows: first grease the end of the cable, and then insert it into the rod, then, as you move it inside the tube, apply the grease to the part and distribute it evenly over the surface. Then insert the boom with the flexible shaft into the electric motor and secure it.
In the event that the lubrication did not help and the vibration continues to appear, the flexible shaft will need to be changed.
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Repair of lawn mower with their own hands: analysis of defects and methods of their independent elimination
Do-it-yourself lawn mower repair: analysis of defects and how to fix them yourself Benzocos.
The next step is to repair the carburetor, where you have to find the problem and remove it, given the tiny size of the parts. If simple operations do not yield results, in order not to break the narrow set of accounting programs, it is better to entrust the repair to a specialist. With what to start diagnosing and how to properly conduct lawn mower repair with your own hands, read on
When to call for repair
If the device is under warranty, at the first sign of malfunction you can safely take it to the specialized repair shop. Repairs will be done for free, regardless of the nature of the damage, if it was not the fault of the owner. In case of breakdowns in the engine to a person uninformed in technology, it is better to immediately contact a specialist. In any case, the degree of seriousness of malfunction with the unit is determined by the user himself.
To summarize. 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 care and attention on the part of the owner. With strict adherence to the manufacturer’s instructions and regular wear and tear maintenance, this lawn mower runs smoothly and without interruption.
Why doesn’t the STIHL electric brushcutters work at full throttle?
When using an electric grass trimmer, you can also have problems with revolutions. The reasons for this are completely different from those for fuel-powered mowers.
You can solve the problem yourself
The electric grass trimmer does not develop the required power, because:
- mains voltage is more than 10% below the minimum required for the device;
- there has been a failure in the smooth start-up (if there is such a system);
- a defect has occurred in the brush unit;
- The motor winding is at fault;
- Rotating parts sometimes get jammed.
To adjust the voltage, it is worth checking the power rating first. If it does not comply with regulations, increase it with the help of a stabilizer.
The softstarter can only be repaired in a service center.
The brushes are worn and need only to be replaced. If new blades are fitted, we recommend that you clean all surfaces they come into contact with.
To adjust the voltage, check the power first.
If the motor windings are burning up, the electric motor must be replaced.
Sticking of rotating parts can be caused by many things. To get rid of them, the entire drive unit must be reconsidered.
This last problem can also occur with another STIHL pruning shear, and sharpening the blade on the shears is the solution.