How to remove magneto on a trimmer. Is it possible to make a coil for a trimmer for the grass with your own hands

TRAMER REPAIR OF THE TRAMMER for Grace with your own hands

Motokosi is a popular seasonal tool designed to remove unnecessary vegetation in the house site. Like any other technique, these devices periodically break. Repair of a he ignition coil of a trimmer for grass is one of the popular problems characteristic of gasoline cos. The ignition system itself is designed similarly on two- and four-stroke ICEs, so the elimination of the breakdown is almost the same for the tools of different manufacturers, whether it is “luxury”, Huter, Husqvarna or other brand. Ways to restore the performance of the ignition coil or replacing it with a new one. in the material further.

The purpose of the ignition coil is the conversion of rotation energy into a high.voltage discharge and the formation of a spark that ignites the fuel mixture. In the internal combustion engine, this part is called magneto, since in it alternating current is generated from rotation of a constant magnetic rotor or anchor.

Magneto constructively consists of two windings: high and low voltage. The condenser with interrupter contacts are parallel to the latter. Whereas the conclusions of the high.voltage winding are connected to the candle and body. They are both wound on a core between the poles of which a rotating magnet is installed, magnetized longitudinally.

On a note! The whole structure looks like a large coil installed on the P-shaped core.

Checking performance

Before the diagnosis of Magneto, you need to make sure that the problem is actually in this node. To do this, check the entire chain and make sure that there are no other reasons for the breakdown of the trimmer for the grass.

• First, you should carefully examine the coil for the presence of cracks and other external defects on the case. Next, you will need to study all the elements and nodes conducting the current and make sure that they are clean.
• The next step is the inspection of high.voltage wires. They must be working and reliably attached to the contacts, without traces of rust and with intact insulation.
• The next action will be checking the candle cap. As a result of careless actions, the user often tears it off from the high.voltage wire, and then improvises and creates a home.made mount. You need to understand that any poor.quality connection in this place significantly reduces the power of the electric arc of the candle.
• Then you should make sure that the candle itself is working. If you refuel a low.quality motorcycle with gasoline, the service life of this part is significantly reduced. In addition, it can be flooded or have a large incapacitance that prevents work. Sometimes the candle even takes up and does not unsc.
• Next, you need to inspect the circuit switch. On trimmers and chainsaws of Chinese.made, it very often breaks.

Having performed all these actions and excluding the listed nodes from the list of possible causes of breakdown, you should proceed to check the coil. This can be done with several methods.

The first way to check the ignition coil involves the use of special equipment (stand). At home, it is unavailable. you can find it only in service centers.

Magneto diagnostics by means of a multimeter. a solution that can be implemented on its own if there is such a measuring device. In this case, it is necessary to perform the following.

• Enable the resistance mode on the measuring device and set the value of 200 Ohms to test the primary winding.
• Connect the electrodes of the multimeter to the “mass” of the magneto and the outgoing contact. If the winding is intact, the resistance will vary from 0.4 to 2 Ohms.
• Turn on the 20 kOhm tester to diagnose the secondary winding. In this case, the first probe is connected to the “mass”, and the second is installed in a candle cap. Normal values-at least 4-6 kOhm. If the chain is damaged, then the tester will show infinity, and in the case of close. zero.

Accurate data about what should be the tester’s testimonies during the verification of primary and secondary winding, can be found in the instructions for using a trimmer for grass.

If there is no multimeter, you can check the coil in another way.

Important! You need to carefully check so that the magneto does not burn. For this, it is important not to touch the cylinder by the electrode.

For diagnosis, the following steps need to be carried out:

• open the lid with which the cylinder is closed;
• remove the cap of the high.voltage wire from the candle without twisting the part itself to maintain compression;
• Place a nail without a hat tightly in the cap, it will imitate the central electrode of the candle;
• Dielectric material tie the cap with a nail to the cylinder so that the gap between the mmator of the Electrode of the candle and the mass fluctuates from 5.5 to 7 mm (the exact distance for a particular model is recommended to look in the user guide), but the part did not come into contact with the mass;
• The starter several times play the start of the engine, holding the ignition button in the on the on position;
• If a spark appears, you need to consider what color it is.

The white or bluish powerful spark is normal, and a weak glimpse of an orange or yellow shade reports a breakdown of the coil.

Often the cold magneto creates a powerful spark, but when heated due to a defect in the internal nodes, does not conduct current. After cooling the coil, the lawn mower starts again and mows the grass with a fishing line or knife until the magneto is heated. This is abnormal behavior, so you need to change the coil.

On a note! Similarly, the problem can occur when the candle is heated and cooled, so it is recommended to check the performance of both parts.

Replacing Magneto

To correctly purchase Magneto for replacement, you need to contact a specialized store or service center and name the brand and model of a trimmer for grass.

Advice! Another good decision will be the provision of an old ignition coil, according to which the seller will be able to choose a new part.

To remove the magneto, you need to remove the plastic casing from the trimmer for the grass. On different models of motorcycle, this process is different. It is usually necessary to unscrew the bolts, but on some benzotrimers it may be necessary to squeeze the latches. After that, access to the coil opens. To remove the part, you need to unscrew the holding fasteners and disconnect the wires.

When installing a new part, you need to correctly set the distance between the flywheel and magneto. To do this, you need to turn the flywheel with magnets up, install the coil and fix it, but the screws do not completely tighten, so that there is a short distance between the details. Further, between the coil and the flywheel, it is necessary to put a calendar, a business card or four.folded paper sheet of A4 format, you can also use a plastic strip cut out of the bottle. Such tricks will provide a suitable gap between the flywheel and magneto. A more competent solution will be the use of a special template, but it is impractical to purchase it for the sake of once. Next, you need to tighten the fasteners, remove the object between the details, and, holding the magneto with your hands so that it does not spin, tightly tighten the fixing screws. After that, you should crank the flywheel and make sure that it does not catch the coil anywhere. Now you need to connect the wires and insert the candle into the cap, and then check the operation of the device.

Preliminary preparation

At first, to wind the fishing line is required take off

The coil (bobbin, spool) is a streammer for grass. certain acts will depend on the difficulty of configuration and the type of product itself:

• Small electric trimmers for grass with a working location of the motor and coils at the bottom, usually have side buttons on both sides of the bobbin. With the simultaneous press on their upper part of the coil, along with the internal contents for winding the fishing line, it is disconnected, while the lower remains on the trimmer. The analysis of the bobbins is better to create in an even smooth place so that the spring entering the design does not jump out and not be lost;
• Electric and gasoline trimmers for grass with a curved rod without the ability to install a knife, usually have coils with a special lamb: in similar structures, you should hold the rogue in a motionless position with one hand, and turn the fixing bobbin on the bar with a barack tank with one hand. How to refuel a fishing line for a trimmer trimmer for grass? How to refuel a fishing line for a trimmer to a trimmer coil for grass. It is clear how to charge a fishing line for a trimmer for a trimmer for grass. After disconnecting the nut, the whole bobin is removed.
• Electric and gasoline trimmers for grass with the ability to install a knife on a straight rod (for example, trimmers for STIHL grass) have a hole. For the immobility of the bar, a screwdriver or other suitable object is inserted into this hole and, with slow rotation, such mutual placement is achieved when the screwdriver enters the hole and the bob is fixed. After that, the coil body is scrolled clockwise (with the left thread) and removed from the trimmer for the grass.

Read step.by.step disassembly of the chainsaw of Stihl 180

For the second and third options of coil, depending on the design, are versed in various ways. In the bobbins with a lamb, lamb is twisted, in the reels with latches, latches-fixers are pressed and one part of the coil is freed from the other. How to refuel a fishing line for a trimmer in how true a cheap fishing line for a trimmer. 2. On your site. If the halves of the spool are connected by thread, then it is enough to turn them with your hands in the back of.

Tools for repair

Work required screwdrivers and an old tester with wires and a soldering iron.

The camera was with him and managed to take all the actions to restore the performance of the electric motor. I inserted these photos into the text of the article.

Calling the scheme

To check electrical circuits, it is necessary to call them with a tester or call. I have an old device Ts4324 at such purposes for such purposes. The power circuit for measuring the current is carried out by nickel cadmium batteries.

After long.term storage, they found themselves in a discharged state, and are operated since 1994, when I purchased them on sale. It was no longer possible to use them.

Tester power

The technical solution was prompted by an old mobile phone. I used its battery to supply voltage, having previously checked it with the same device in a voltmeter mode.

I seized the old batteries, and supplied the power with thin wires of different colors directly on the tester output in compliance with polarity. For connection, I used a soldering iron and tape.

Calibration

There were no difficulties here. The power of the battery battery was quite enough for measurements and calibration.

The devices of the device installed in the “Ommeter” position, and put an arrow pointer to zero with a potentiometer handle. The pointer was not engaged in adjusting the mechanical balancer, it was normal before.

The tester is prepared for measurements of resistances on the divisions.

Sprinkles

The housing of the electric engine is attached with screws-sam cutters with a medium-sized cross-shaped head. The old Soviet.time screwdriver satisfactorily approached them and a good coverage of the faces was created by a head from a set of tools purchased in the online store.

However, a short working body of a combined screwdriver did not allow working in deep excavations. All hard.to.reach places were inaccessible to her. Significations showed images in subsequent photographs.

How to adjust?

The highest load during the operation of the chainsaw is of course falls on the engine. The most vulnerable part of it is the ignition coil. Small problems can be eliminated by yourself, for example, to configure the ignition.

• You want to extend the service life of the saw. for preventive purposes;
• The chainsaws are not started, the problem in the size of the gap has been revealed (for each model, the manufacturers wrote their size, the parameter from 0.2 to 0.4 mm is considered averaged indicators);
• The motor works with interruptions;
• The power of the tool decreased.

In domestic conditions, we can adjust the gap in the ignition coil, which in many cases solves the above problems.

The algorithm for putting a gap

To regulate the gap in the ignition coil of the chainsaw you will need: a template for setting a gap or a probe (most often a home.made blank, for example, a piece of a plastic bottle or cardboard), an end key of the desired size.

All models have the structure of the coil the same, only the dimensions recommended by the manufacturer can differ. Consider for example an algorithm for regulating a clearance for one of the most popular and recognizable models of a chainsaw. Stihl 180.

STIHL MS 180 rupture ignition system. A. coil and magnets on the flywheel, B is the place of placement of contacts, c is the flywheel.

We will prepare everything you need, including cut a strip from a plastic cylinder without embossing. it will serve us as a template. The optimal gap for the Stihl 180 chainsaw is 0.2 mm value. (depending on the model, this value can fluctuate from 0.2 mm to 0.4 mm). Next, we perform the following sequence of actions:

• We remove the protective cover;
• We will remove the module with a nursing and a high.voltage wire;
• Unscrew the ignition bolts for weakening;
• We bring magnets located on the flywheel to the coil;
• Click a plastic strip between the flywheel and the coil. Thus, we expose the necessary gap;
• Twist the bolts and remove the plastic strip;
• We will perform the audit: scroll several times the flywheel in the full revolution, make sure that the movements are free and the flywheel does not cling to anything.

The procedure for regulating the gap of the ignition coil will be the same for all brands. However, I would like to note that a distinctive feature of Chinese-made chainsaws are frequent breakdowns of electronic ignition blocks and weakening of threaded fasteners due to poor-quality assembly.

Therefore, you will have to adjust the gap about 3 times more often than, for example, in the same “calm”. It is worth noting that often in a kit for Chinese.made saws, poor.quality candles are supplied. It makes sense to stock up in advance.

The moment of the urgent angle

This is one of the most important parameters. It determines the correct operation of the entire system.

To make a mixture effectively, a certain time is required. The speed with which the flame spreads is 20 m/s. If the ignition occurs at the upper dead point, then the fuel will burn out on the expansion tact and partly on the release. As a result, the pressure on the piston will not be at a sufficient level. It is necessary to choose this moment correctly. then the pressure from expansion and combustion of gases will be on the VMT.

Diagnosis of malfunctions

All the reasons why the lawn mower is not started can be systematized by the specifics of the operation of individual units. The service center is systematized:

• Motor malfunction (piston wear, bearing malfunction, crankcase crack);
• Fuel consistency supply malfunction. clogged pores of an air filter or a malfunction of a carburetor;
• the ignition system does not work;
• A malfunction of a mechanical disposition. a leak of hoses, broken wires under a braid, rupture of the tubes.

The user first needs to check if there is a fuel in the tank. Starting in agreement with annotation, putting the saw on the side. Gasoline trimmer for grass; starts without problems. May not start. Set the air damper to the position “Closed”, pump up fuel, turn on the ignition and produce 3-4 sharp jerks by the starter. If the engine has earned, open the air damper. The lawn mower is not started. we repeat the operations with a slightly open air damper.

The lawn mower cannot work for a long time. Gearbox and engine will overheat. Mowing less than 15 = 20 minutes, taking a five.minute break. In hot noon, the operating time is reduced by half. When mowing weeds, sedgers, the working hours are required to reduce.

If you are unsuccessful, we begin to find the reason for the refusal:

• check the quality of fuel;
• make sure the operability of the candle and the cleanliness of the candle canal;
• check the cleanliness of the air filter;
• Make sure that the fuel filter is not clogged;
• Check the cleanliness of the bastard;
• Clean the exhaust channel.

complex reasons will be detected in the diagnosis of a malfunction, leading to the overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear on it gaskets and violation of the tightness of internal halls with a vacuum loss. The causes of gasoline breakdowns and why the gasoline trimmer for grass is not that the internal combustion engine does not start. DIY lawn mowing repair, if it does not start, will require patience.

Replacing Magneto

To correctly purchase Magneto for replacement, you need to contact a specialized store or service center and name the brand and model of a trimmer for grass.

Advice! Another good decision will be the provision of an old ignition coil, according to which the seller will be able to choose a new part.

To remove the magneto, you need to remove the plastic casing from the trimmer for the grass. On different models of motorcycle, this process is different. It is usually necessary to unscrew the bolts, but on some benzotrimers it may be necessary to squeeze the latches. After that, access to the coil opens. To remove the part, you need to unscrew the holding fasteners and disconnect the wires.

When installing a new part, you need to correctly set the distance between the flywheel and magneto. To do this, you need to turn the flywheel with magnets up, install the coil and fix it, but the screws do not completely tighten, so that there is a short distance between the details. Further, between the coil and the flywheel, it is necessary to put a calendar, a business card or four.folded paper sheet of A4 format, you can also use a plastic strip cut out of the bottle. Such tricks will provide a suitable gap between the flywheel and magneto. A more competent solution will be the use of a special template, but it is impractical to purchase it for the sake of once. Next, you need to tighten the fasteners, remove the object between the details, and, holding the magneto with your hands so that it does not spin, tightly tighten the fixing screws. After that, you should crank the flywheel and make sure that it does not catch the coil anywhere. Now you need to connect the wires and insert the candle into the cap, and then check the operation of the device.

Prevention of the problem

Often, the breakdown of the ignition coils are associated with the closure or cliff of windings and mechanical damage to the magneto body. This is due to strong blows, fluid and oxidation, as well as overheating. If you avoid such incidents, you can not worry about the integrity of the ignition coil.

Important! To prevent regular failure, one of the most important components of the ignition system, you need to refuel high.quality fuel. Bad fuel spoils these details.

One of the nodes of Magneto, which regularly suffer when using, are high.voltage wires through which current from the ignition module enters the candles. They have a high service life, but the damage to them is caused by users by an inaccurate circulation when replacing candles, carefully pulling the wire itself, and not for the tip. Another problem that can happen to them is moisture and oxidation or damage to isolation. If you carefully pull out the candle and avoid the penetration of the liquid into the device, these problems can be avoided.

So, the repair of the ignition coil is not very complex and can be carried out by the user independently, but subject to the above procedure for disassembling and replacing the magneto or contacts of the interrupt.

Causes of malfunctions

The reasons for the breakdown can be different, divided into the following groups:

• Mechanical damage. Inevitable aging that caused a violation of isolation. The flow of oil through the seal that violates the insulation.
• Overheat. Overheating reduces the life of any details. It is difficult to control it. Follow the temperature along the sensor in the cabin, use high.quality antifreeze, do not allow leaks and boiling of the motor.
• Vibrations. The occurrence of vibrations is especially harmful to the reel. To reduce them, you need to periodically check the motor cushions (change worn out), and eliminate interruptions in its work.
• Marriage or not suitable candles. Another reason for the breakdown may be the use of poor.quality candles, or that does not correspond to the ignition system.
• Violation of contact. The reason is the oxidation of contacts caused by moisture. The rainy weather or inaccuration when washing the car is guilty of everything. In winter, oxidation can cause a composition that sprinkles roads against ice.

The engine of the lawn mower is not started.

Everything is simple here, a few main points for any motors: that the engine works good compression, its absence will not allow the motor to start. The following that you need to check this ignition, there will be no ignition without a spark. The clogged fuel system will make it difficult to feed the fuel and the contaminated exhaust system also greatly complicate the launch of the motor.

Perhaps this is the main thing you need to check. The most popular repair scheme is the exclusion method. That is, in order we cut off options for faults, I will tell you more:

Fault of the piston group

On the entire two.stroke technique that is brought to us, we first check the bully on the piston and cylinder. You can do this by unscrewing the 2 muffler bolt and taking it off, shut up the exhaust window. If the piston is smooth and the rings are springy. this is good if the piston is in damage or rings and hesitated. this is not acceptable. The cause of the breakdown is overheating, the old fuel mixture or the absence of oil in the solution. The only panacea is a major overhaul with the replacement of the piston.

Trimmer ignition malfunctions

Next, check the spark, leaning a candle to the mass and scrolling as a starter as follows. If there is no spark, disconnect the wires from the coil to exclude the switch. We perform all operations only with a new candle. Dragged, pumped, wiped candles will not work. There are also cases when a spark disappears on a heated spit and does not appear until complete cooling. Poor contact of the cap and high.voltage wire is possible. If the spark does not appear, the ignition coil replacement is necessary.

Fuel system pollution

If everything is in order with the motor and spark, let’s try to start. We recommend that you sprinkle the carburetor cleaner into the combustion chamber, under a candle or in the carburetor window. The motor will start and most likely stall, repeat the operation several times. If nothing helps, you need to try to clean the carburetor. We do not recommend climbing on our own, due to the presence of small details or their absence as a result of inexperienced repair. Fuel system pollution is the most common malfunction.

Carburetor malfunction

Unfortunately, cleaning the carburetor is not a panacea and it is not always possible to clean it completely. Even ultrasound and a good cleaner are sometimes powerless. Also in carburetors often fail: needle, check valve, accelerator valve, membrane, needle and saddle. Someone will say what to break there, but the saw carburetor is structurally more difficult than the car carburetor. In many cases, it is necessary to change the carburetor of the whole or some of the parts.

The clogged exhaust motorcycles

Since oil is present in gasoline, it burns and releases a lot of burning, which is postponed in the muffler and graduation window. On some trimmers, a mesh is installed. a flame arrester, it also needs to be cleaned. Muffler either change or try to burn. My experience allows you to determine whether the exhaust is clogged, just pulling the starter. If you find a dozen in the window, mcorm it, he should not get into the combustion chamber. Use good oil with low smoke emissions.

How to remove the rotor magneto flywheel on a motorcycle

How to remove the Magneto Rotor (flywheel) on a motorcycle.

The inclusion of this option will allow you to add to the link the start time of the video playback, where h: m: s. Clock: minutes: seconds

Malfunctions and elimination of problems

Electric and gasoline trimmers for grass have general malfunctions and defects. In the case of equipment with an internal combustion engine, this is:

• problems with the carburetor;
• Engine failure;
• Problems with the fuel system;
• failure of the gearbox, starter, muffler;
• sabo;
• air filter malfunction;
• Problems with ignition coil.

Electrical equipment has certain units:

In case of simple problems, you can repair a trimmer for grass with your own hands.

Why is your trimmer not starting for grass

The most common reason that the machine does not start is the use of low.quality fuel. The choice of gasoline of the brand below the AI-92 can lead to damage to the machine. If the used fuel of good quality, look for other reasons. For this, all nodes and systems are carefully checked. The following components must be checked:

The device may not turn on after a long period of inaction. Before starting a trimmer for the grass, carefully read the operating instructions. There are solutions to many problems.

If the trimmer for the grass stops when you press the gas pedal

There are several reasons why the trimmer for the grass stops on the throttle:

• The first reason is the malfunction of the carburetor.
• Flaw valve clogging.
• Clotting of the check valve.
• The weakened and unimportant hose of the carburetor or the weakened fuel intake hose.

To avoid the problems described above with the mower, carefully inspect the condition of the machine and its components. Timely cleaning and washing of the car and its parts will extend the life of the machine.

Starter malfunctions

The most unpleasant starter malfunction occurs when the cable breaks off and wound on the flywheel during engine operation. As a result, the spring may break, and the pulley is torn. In this case, only a complete replacement of the part will help. This type of refusal is rare. frequent cases are:

In this case, the starter is easy to repair on its own. The manufacturer has prepared a step.by.step instruction for this.

Repair of the gearbox

To maintain a gearbox of an electric braid for grass in good condition, it must be lubricated in a timely manner. Otherwise, the gears can be quickly worn out, and the transmission module can jam.

The main malfunctions in the transmission of a trimmer for grass

• Strong heating of the transmission node due to the use of a small amount of lubrication or its absence;
• The shaft was jammed due to rotating worn bearings;
• Staggering or slipping the shaft of the gearbox assembly due to damage to the housing;
• The inability of the output shaft rotate along with the disk due to wear of the teeth on the gears.

Most of the gearbox failures are caused by the destruction of bearings.

This is due to the use of poor-quality lubrication or its absence. Another reason for the breakdown of the gearbox is when a trimmer for grass is used at the limit of its capabilities and extraneous objects get inside. To replace a faulty bearing, it is necessary to disassemble the gearbox.

Features of electric models

Models of trimmers with an electric drive from the network have several main blocks

Each electric trimmer for grass has certain disadvantages. In the mechanical part, they depend on the fishing line used as a cutting element. Reasons for the termination of work:

The electric part of the braid braid can be found using the tool:

To solve this problem, use a cutter.

• damaged power cord;
• problems with an outlet and fork;
• damaged control handle;
• The starter solenoid burned, it is necessary to replace the engine;
• Damaged contacts can be repaired independently using a soldering iron.

These are the main reasons why there may be no spark on the trimmer.

Prevention of problems

Damage to the ignition coil is often caused by a short circuit or a break in windings, as well as mechanical damage to the magneto body. This is caused by strong blows, fluid and oxidation, as well as overheating if these events can be avoided, then there is no need to worry about the tightness of the ignition coil.

Important: in order to avoid regular failures of spark plugs. one of the most important components of the ignition system. it is important to use high.quality fuel. Poor fuel destroys these details.

One of the parts of Magneto, which is regularly damaged, is high.voltage wires that supply current to the spark plugs from the ignition module. They have a long service life, but are damaged by users themselves due to negligence when replacing plugs, when they pull the wire itself, and not for the tip. Another problem that can happen to them is moisture and oxidation or damage to isolation. These problems can be avoided if you carefully unscrew the spark plug and prevent liquid from getting.

Thus, the repair of the ignition coil is not too complicated and can be performed by the user, provided that the procedure described above the removal and replacement of the contacts of the magneto or the interrupter described above.

Why do you need a good spark.

The quality of the spark determines its ability to set fire to a properly formed air-fuel mixture in working conditions. A weak spark in the conditions of lean pressure and temperature in the combustion chamber cannot do this. Ignition occurs later or does not occur at all. There is an unevenness in the operation of the engine, the motor does not gain momentum, vibration, detonation occurs, the “reverse impact” effect may appear in the starter.

The insidiousness of such a breakdown is that the diagnosis below does not give a hundred percent confidence in the performance of the ignition coil. Such implicit breakdown, when there seems to be a spark, but it is not entirely correct, often misleads and makes you write off problems with the ignition coil to a carburetor malfunction. Typical actions in such cases are an increase in fuel supply. It turns out that it can set fire to the enriched mixture such a spark, but there is no correct. But the use of an enriched mixture leads to the rapid wear of the cylinder-piston group and muffler. Therefore, in such controversial situations, check both the carburetor and the ignition coil once again.

The best lawnmands

But pieces of the cable remaining on the field are half a bastard. The fishing line for the trimmer, breaking off, weakens the dynamic blows to the transmission and the engine, the cable does not give such an opportunity. Result of quick wear of motorcycles.