Lawn mower starter does not return. Three-dimensional starter. Design and principle of operation

How to do lawn mower repair yourself

The starter is a key component of the hedge trimmer that makes starting the tool’s motor much easier. Its breakdown can occur at the most inopportune moment, which, of course, leads to significant changes in the daily plans of the owner of the site. You can solve the problem in two ways: repair the grass trimmer starter with your own hands or replace the entire unit. The easiest way to solve the starting problem. is to replace it completely, but from a financial point of view buying a new starter can seem too complicated. To fix the damage yourself, just prepare a screwdriver with the appropriate tip and read the following recommendations.

Chainsaw is the main tool with which you can stockpile firewood for a bath or fireplace, you can also use it for construction work on the dacha or a private home. If you follow all the operating criteria and preventive measures that are provided by the manufacturer, the chainsaw can last a long time. But in time small problems can occur which can be solved without help from others. For example, repairing a chainsaw starter with your own hands is entirely within your power if you follow the sequence of operations.

1 starter screw, 2 bushing, 3 spring easy starter, 4 screw, 5, 6 coil starter, 7 deflector, 8 cover starter, 9 handle and cord, 10 screw.

Design and principle of operation of the starter on a trimmer

The gasoline engine is basically the engine of the brushcutter. Its output is in the 0.5 to 2.5 liter range.с. The movement from it is transmitted to the shaft, which is located inside the hollow rod, and then through the reducer, consisting of gears, to the line or the blade (working body).

The lawnmower also has the following items:

All parts of the brushcutter are shown in the photo below.

The starter motor on a trimmer is the essential part that does the starting of the engine. It is shown separately in the two pictures below.

Starter mechanisms of different models of chain saws work on the same principle: during the start of the engine, the ledges, marked in the photo above by the number 1, enter into a hitch with the pawls 3. When the engine starts to run, they return to their previous position because of the centrifugal force. A similar role is also played by the wires 2.

The process of resetting the mechanism elements is due to the presence of a spring wound around the axle. It unfolds when the rope is pulled. When the cord is released, it retracts and winds up because the spring unwinds. When starting the lawnmower’s internal combustion engine, the starter mechanism turns its shaft until it starts working (starts up).

Today’s petrol brushcutters are equipped with two types of starter mechanisms:

The first variant is much more common.

lawn, mower, starter, does, return

The starter on the trimmer can function without damage for a long time. It is not possible to state definitively the period of failure-free operation. Everything depends on the initial quality of the machine and the correct handling of the machine.

Lawnmower design and common faults

The easiest way to give a lawnmower in the repair, allocating a certain amount of money from the family budget, prompt and quality repair with their own hands are no less simple and convenient if you want to understand the design of lawnmowers and fix all the problems.

Mass and piece production of trimmers is based on the use of generally accepted technology, the typical design scheme consists of certain elements and parts, it is important to know them when carrying out independent repair work:

  • The upper part. The base of the entire structure, where all the important elements are assembled, such as the starter, carburetor and lawnmower engine;
  • middle part. Hollow rod, inside it there is a cable that connects the motor and gearbox, which drives the cutting line for the trimmer. In this part, there are mounts to distribute the weight of the entire structure and a belt for fixing the grass trimmer on the belt of the person using the grass trimmer for its intended purpose;
  • bottom part. It contains the gearbox and the cutting elements, which are hidden under a practical cover that protects the user. The cover provides an increased level of safety, preventing large fractions of debris, pebbles and glass from getting into a person while working with a chain saw.

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Knowing exactly the internal structure and the principle of operation of the grass trimmer, you can independently carry out repair measures for the structure or replace individual, failed nodes, using the repair instructions.

  • engine malfunctions that cause the lawnmower not to start and does not work
  • Increased vibration of the brushcutter bar, making it more difficult to use as intended;
  • Increased gearbox overheating, accelerated heating during operation;
  • slow and weak cutting line at insufficient RPM;
  • clogging of the starter grid, causing overheating of the engine and its failure to work;
  • the carburetor frequently and quickly becomes clogged due to low-quality fuel;
  • clogging of the air filter if you do not take care of the device.

All of these problems can lead to the fact that the device will lose its ability to work, before ordering the necessary spare parts for beznokosa should conduct a visual inspection and diagnosis of the device.

Particular attention requires individual parts and units of the device, to check them you do not have to go to a professional technician, a set of diagnostic measures will help with their own hands to identify the consequence of the loss of serviceability.

Grass trimmer winding switch repair with his hands

In detail: repair of grass trimmer starter with your own hands from the real master for the site olenord.com.

The grass trimmer repair is necessary when the device does not turn on or does not function properly. All owners of private houses and country plots are familiar with the problem of excessive vegetation, getting rid of which is sometimes not easy. As you know, progress does not stand still and new developments and useful inventions appear in all areas. Farming is no longer a problem either. No more need to cut the grass with old inconvenient devices, come to the aid of modern petrol mowers, which can get rid of vegetation in the most remote places.

Gasoline trimmers can mow even during cloudy weather. It’s easy to manage a garden plot with this machine, and any adult man can do it.

Despite its versatility, grass trimmers tend to break down and fail, like any technique.

Repair lawnmower with their own hands can not every man, because this requires skills to fix electrical devices, but today we will try to figure out how to start the trimmer for the grass without the starter, and how, in general, you can debug its work with their own hands.

Grass trimmer repair with your own hands involves the removal of all the problems that prevent the normal operation of the unit. Among the most common are the following:

  • Breakdown of the cylinder-piston group (CPG) of the engine;
  • The grass trimmer fails when trying to increase the speed of operation;
  • ignition coil failure;
  • there is no connection between the engine and the gearbox;
  • there is a strange noise during operation;
  • the engine can not reach the desired speed.
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The failure of the engine cylinder head can occur due to poor fuel quality or wear of the motor parts. As you know, the piston group is lubricated by oil, which is added to the gasoline. Lubricant precipitates in the old oil, making the oil unusable. If you keep trying to run the trimmer for grass, you can ruin the motor in a matter of seconds, and this will incur additional costs for the repair of the trimmer for grass. This breakdown is considered to be the most expensive. To fix it, you need to replace the piston assembly, to be more precise, you may need to replace the cylinder, rings, piston and seals. In such cases, it is unlikely to get by without additional assistance, unless you are a master and know how to handle such equipment.

Repair lawnmower with their own hands can be carried out if it starts up and works at idle speed, but then zabuhankayutsya when you try to increase the speed of work. To fix this breakdown, you need to repair the carburetor or clean the muffler or gas filter. At first glance, everything is quite simple to solve, but if after you clean the clogged parts of the grass trimmer, it did not work, then you may need additional diagnostics.

The main sign that the ignition coil has failed and trimmer repair is required is the lack of spark on the spark plugs. It is very important in this breakdown not to rush to replace the coil, in most cases the cause of the breakdown is a lack of contacts, in the switch button, which may have broken, or the problem in the spark plug itself. It needs to be checked for sure, there may be a current breakdown somewhere, or there are gaps or fouling.

If the grass trimmer engine can not develop the desired speed, it is likely that the air filter is clogged or there is debris in the engine itself. The solution to the problem is clear at once. clean the engine and the filter, in some cases you may need to replace the filter.

In the process of work, most users of trimmers face constant noise. If you hear a characteristic knock, as if on metal, it is likely that the engine in the trimmer overheated or the fuel does not pass. To eliminate this sound, you need to fill up with gasoline or turn off the mower for a while.

Do not exhaust the unit: if it will constantly work on wear and tear, its service life will be reduced several times. If the knocking is felt in the engine itself, the cause is a faulty piston, piston ring, worn cylinder or crankshaft bearing. To eliminate the knocking, you need to replace the faulty part in the trimmer.

Sometimes it happens that the engine in the trimmer works normally, but the output shaft rotates very weakly or does not rotate at all. This is reflected in the fact that when the grass trimmer touches the grass, it stops working at all and shuts off.

To resume normal operation of the mower, you need to check 3 main components, namely:

Gearbox is a very important component, so the grass trimmer repair in this case should be carried out by an experienced technician, and in order to avoid such failures in the future, the gearbox requires appropriate maintenance.

In addition to the above-mentioned failures, other malfunctions can occur, for example, the power button falls down or the limiter falls off the mowing head. You can replace the trigger with a soldering iron and the limiter can be wired with copper wire. You notice that your trimmer line is torn or out? It is enough to buy a new reel of line of the same diameter and, after disassembling the drum, wind it on the bobbin.

If you want your mower to work for a long time without interruptions, it needs constant servicing, you can call a service center or perform the diagnostics yourself.

You should constantly check the bushing of the shaft and change it if necessary, the same thing is true for the spark plug.

The gearbox needs to be constantly filled with special grease, partially disassembled motor part and cleaned of accumulated dirt. In most cases, such maintenance of the grass trimmer is carried out, according to a certain number of hours worked.

Repair kickstarter lawn mower with his own hands

In detail: repair kickstarter lawnmower with their own hands from the real master for the site olenord.com.

We will repair the starter from a brushcutter. Often there is a situation, wind it up and the rope does not come back. How to fix? To begin with, we remove the starter from the grass trimmer and unscrew the central bolt. There are different mechanisms, wire, butterfly with one or two, four hooks There is no difference, the design is the same everywhere. We remove the upper mechanism, do not lose the spring and see what happened. Completely lost the spring, it may burst or fly off.

How to repair? First you need to untie or cut the string and remove the handle, pull out the mechanism. Carefully, remove the face because the spring will shoot out. See what happened to our spring. Often on a spring, if it is hardened, it breaks off the ends. In this case all the ends are intact, the spring is off.

What to do? Wrap it back on. It’s easy to do. We take the inner mechanism, there is a groove for the spring. Hence it flew off. You take it and unbend it a little but not too much as the spring is forged. You squeeze it too hard and it can burst, and then you can’t do anything. Although the spring is inexpensive, but you have to look for it, order it. We put it here and carefully, holding it, begin to wind it on the inner side. It doesn’t always work the first time.

The spring is screwed on, it is tight. Don’t worry, even sometimes you can’t get it right away. Practice, there is nothing difficult.

Gasoline trimmer starter repair for grass can be needed at the most inopportune moment. There are two ways to solve the problem: to replace the broken part or to replace the whole knot. The last option will cost more. To repair the device with your own hands, in most cases you only need a screwdriver and a suitable screwdriver tip. Repair work does not take much time and does not require special knowledge. It is enough to know the device, the principle of operation, the nuances of assembly-disassembly of the starter on the trimmer to achieve the desired positive result.

Gasoline engine. is, in principle, the main part of brushcuts Its power lies in the range of 0.5-2.5 liters.с. the motion from it is transmitted to the shaft inside the hollow shaft and then to the fishing line or to the blade (operating device) through a reduction gear made up of pinions.

Also, the lawnmower has the following elements:

  • guard;
  • Handle;
  • The belt, designed for easy use of the device;
  • The starter, which is used to start a gasoline internal combustion engine.
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All parts of the brushcutter are presented in the photo below.

The starter on the trimmer is an integral part that performs the start of the engine to work. It is shown separately in the two photos below.

Starter mechanisms of different models of chain saws work on the same principle: during the start of the engine, the ledges, marked in the photo above with the number 1, enter into a hitch with the pawls 3. When the engine starts, they return to their previous position because of the centrifugal force. The wire rope also has a similar function 2.

The process of resetting the mechanism elements is due to the presence of a spring wound around the axis. It unwinds when the rope is pulled. After the cord is released, it retracts and winds due to the unwinding of the spring. When the lawnmower’s engine starts, the starter mechanism rotates the shaft until it starts working (starts up).

Today’s petrol brushcutters are equipped with two types of starter mechanisms:

The first variant is much more common.

The starter motor on a trimmer can run for a long time without failure. It is not possible to state precisely how long the machine will work reliably. Everything is determined by the original quality of the device and compliance with the rules of handling.

Determine the cause of a broken starter is not difficult. There are several basic variants:

These parts are shown in the photo below.

It may happen that the starter mechanism is accidentally broken. The consequences will turn out to be pitiable, if the torn rope winds around the flywheel of a running engine: then the spring will burst, the pulley will tear. But such cases, when a complete replacement of the starter unit is required, are very rare. In most cases, to fix the mechanism, it is enough to put a new spring or replace the cord.

To repair the grass trimmer starter, you will need to first disassemble it, and then assemble. This process is not a particularly difficult undertaking. To work you need a screwdriver with a tip of the right shape.

Everything should be done carefully, observing safety precautions, mainly so that the spring in the accidental release did not injure the master.

lawn, mower, starter, does, return

Disassemble the starter mechanism in order to install new parts in place of the broken ones in the following sequence:

  • unscrew the screw fixing the pulley with the starter cover using a screwdriver;
  • take out the spring and the tendons;
  • carefully remove the pulley (it is necessary to unscrew the head or work, wearing goggles and gloves);
  • determine why the triggering mechanism is broken;
  • if the spring is almost completely destroyed, it must be replaced
  • When the spring is out of the hook, it is installed in its original place, bending before doing so the tendons (the photos show the process of laying);
  • after installing the spring plate inside the groove, carefully twist it.

to change the spring, you must work carefully and carefully: it can, under the force caused by installing it in place, accidentally burst. Even if you carefully remove the pulley, the spring band quickly flies off the coil and its sharp edges can hurt your hand.

Husqvarna 128r brushcutter starter motor repair (rebuild). From the Private Home series.

A slight modification of the starter design.

The starter is one of the main components of the lawnmower, which greatly facilitates starting the engine of the tool. Its failure can happen at the most inopportune time, which certainly entails a significant change in the daily plans of the owner of the site. The problem can be solved in two ways: to repair the starter trimmer for grass with his own hands, or to make a replacement node as a whole. The easiest option for troubleshooting the starting system will be its complete replacement, but from a financial point of view, buying a new starter may seem far beyond the reach. For self-troubleshooting it is enough to prepare a screwdriver with the appropriate tip and read the following recommendations.

As with any garden or construction gasoline tools, the grass trimmer starter consists of a plastic housing, in which a pulley with a pre-wound cord (schmorglka) is installed. In order to automatically twist the rope after the jerk of the starter at the back of the pulley is fixed band spring made of alloy steel. On the front of the pulley mounted ratchet, through which is the engagement of the starter with the drive shaft of the engine trimmer for grass. Depending on the manufacturer and the design of the brushcutter, the pulley with the ratchet can be a single unit or be assembled from two separate parts.

The principle of grass trimmer starter does not practically differ regardless of the model of the unit.

Key components of the grass trimmer starter

When the jerk of the starter rope projections on the sheave come into contact with the pawls, which diverge in different directions under the action of centrifugal forces with a successful start of the engine. There are also models where the ratchet is spring loaded on the side of the body and the reverse rotation of the pulley is the removal of the teeth of the meshing from the motor shaft. Of course, with frequent and prolonged use of the grass trimmer, no one is immune to the breakage of the drive cord or wear and tear of the belt spring. Therefore, in this case it will be necessary to repair the starter trimmer for grass, which can be done with their own hands.

Currently, there are two main malfunctions of the starter of the gasoline trimmer for grass are widespread:

In practice, there are cases where for some reason the starter housing is damaged and the broken cord winds up on the motor shaft, which certainly leads to a broken spring and cracks on the housing. In this situation, the local repair of the starter lawnmower will not be possible, and will require a complete replacement of the engine starting unit. In other cases, troubleshooting will be reduced to the replacement of the spring or cord.

First of all, the repair process begins with the removal of the entire starter from the grass trimmer. This process is not inherently complicated and will only require unscrewing a few screws with a suitable locksmith tool. It should be noted that when dismantling the start mechanism of the lawnmower, it is necessary to observe safety precautions, because the belt spring in the compressed state has enough energy to injure a person.

This stage allows the master to determine the causes of malfunction of the starter unit, as well as to produce defectoscopy of individual parts. Perform disassembly work in the following order:

Removed spring from the starter coil

Many experts note that at the first time to make the installation of the spring is difficult enough, because the owner when repairing the starter trimmer for grass will require not only the basic skills of a mechanic, but also patience.

Although the reassembly of the Lawnmower Starter Assembly is carried out in the reverse order of disassembly, there are some nuances to which you should pay special attention:

    The coil with the installed spring must be inverted and mounted in the groove of the starter housing so that all the tabs are in their original place.

Installing the grass trimmer spool in the starter housing

Removing and disassembling the starter, replacing the broken parts

To make repairs to the grass trimmer starter, you will need to first disassemble it, and then assemble it. This process is not particularly difficult. You will need a screwdriver with a tip of the right shape for the work.

See also  How to wind the line on the brushcutter. Instructions with step-by-step description of how to wind the spool of grass trimmer and lawnmower

Everything should be done carefully, observing safety precautions, mainly to ensure that the spring, if it accidentally comes out, does not injure the master.

Disassembly of the starter unit

Disassemble the starter mechanism in order to install new parts instead of the broken ones in the following sequence:

  • unscrew the screw that secures the pulley with the starter cover using a screwdriver;
  • take out the spring and the tendrils;
  • remove carefully the pulley (it is necessary to turn the head or work, wearing goggles and gloves);
  • determine why the triggering mechanism is broken;
  • If the spring is almost completely destroyed, it is replaced;
  • When the spring is out of the hook, it is installed in its original place, bending before doing so the tendons (photos show the process of laying);

To change the spring, work carefully and carefully: it can, under the influence of the force caused by putting it in place, accidentally burst. Even if you carefully remove the roller, the spring band quickly flies off the coil and can hurt your hand with its sharp edges.

It is not always possible to put the spring plate back in place immediately. It often slips, so attempts must be repeated until the desired result.

Reassembling the Starter

Assembly of the starter unit is carried out in a series of steps:

When performing the above steps, it is always necessary to put two washers on the roller. if this is not done, the spring will eventually damage the plastic cup and when it is tightened, it will begin to seize. This makes it feel as if the spring has come off. To eliminate this defect, it is necessary to install this part of a longer length or an additional washer.

When such parts are not available, you can simply loosen the screw a little, and the starter unit will work without jamming. But this option is temporary. it is better to repair the quality as soon as possible.

Spring tension

After installing the spring, it should be tightened. To do this, perform the following steps:

  • remove the handle from the starter cord;
  • then the rope is inserted into the coil slot;
  • tension the spring by turning the spool clockwise (counterclockwise);
  • make the desired number of revolutions specified in the instruction manual to the used trimmer model for grass and the corresponding length of the cord used;
  • at the very end, the rope is put through the hole designed for this purpose, located in the starter cover;
  • put the handle back in place, fixing it with a knot.

If after repairing the spring continues to fly off, you can get rid of it in the following ways

  • squeeze a suitable size piece of plate into the groove at the location of the spring hook;
  • Drill holes on both sides of the groove in the coil, in which to insert the spring catch and fix it with a wire.

Replacing a torn cord

A broken rope is replaced in this sequence:

  • the old cord is removed;
  • choose the proper size (thickness and length) of rope;
  • putting it through a special hole, located in the spool, tie a knot;
  • cock the spring, making the desired number of revolutions;
  • fasten the handle.

It is better to tension the spring plate with a partner so that the edge of the cord does not wind up inside the starter mechanism.

Assemble the starter on the trimmer and wind the spring is not difficult, but you should do it carefully and with care. For different models of chain saws, the breakdowns of the starting mechanisms are the same, so they are repaired in the same way. However, there are some nuances associated with their design features.

Breakdown Causes and Repair Methods

If, for example, the tool stalls immediately after starting or does not start at all, then pay attention to the ignition system:

  • Remove the spark plug. If there is traces of gasoline-oil mixture on the spark plug, the problem is caused by the carburetor adjustment. Violation of the rules of cold starting in the form of pumping fuel also leads to plugging, and the poor quality of the gasoline used leaves a thick layer of black soot. In these cases, it is necessary to replace the part. If the spark plug is dry, the problem is in the fuel supply.
  • Accumulation of dirt in the gasoline tank will clog the supply hose. Disconnect it. if the fuel does not leak, then the fault vzaporysya filter or breather, which can be cleaned with a needle, but the first must be changed from time to time completely to avoid complications. It is advisable to do this every 3 months.
  • In addition, gasoline trimmers often need to replace the air filter, t.к. If it is clogged, the fuel mixture is not enriched enough.
  • Another cause of malfunction of the gasoline grass trimmer can be the muffler with a build-up of soot in it. To fix such a problem, you can dismantle the part, wash it in kerosene or burn it with a torch. In general, before buying a trimmer for grass, it is advisable to get acquainted with the selected tool through the reviews of other people. Most models have weaknesses. This will allow you to protect yourself from “a pig in a poke” and to be prepared for possible failures in advance.
  • It often happens that during the operation in the lower part you hear some extraneous noise such as whistling and rattling. This indicates the threat of failure of the gearbox. Disassemble the body and pay attention to the space inside the part, if there is no oil, this is likely the problem, lubricate the moving parts. If the desired effect will not take, then you will have to change the gears or bearings. You can check their degree of wear at once, so you don’t have to disassemble the tool several times.

In order to as rarely as possible wonder how to repair the engine, carburetor or gearbox gasoline trimmer for grass with their own hands, do not buy little-used models, t.к. Parts to them will be extremely difficult to find, and the official dealers do not always have the correspond to the capabilities of buyers. If you are new to working with complex technical products, it is still better to ask for help from the service, because.к. self-tuning of the carburetor, for example, can lead to further combustion of the entire piston system. In addition, some parts can not be repaired at all, and the whole block must be replaced, your own repair in this case will not make sense. Also do not rush to open the tool if it is under warranty.

To help you, we can offer the services of a master trimmer repair, which you can find on one of the sites, such as pro.ru. Reference

(Do not forget to select your city ). At least if the repair of the tool will perform a master, you can be sure of the result.

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