Replacing the candle wire on a chainsaw. Setting the ignition system.

Why there is no spark on the chainsaw and what to do

The subtleties of this procedure are clearly visible in the photo. The fact is that this type of inventory is very expensive. That’s why even in the store you can often meet a fake.

How to determine before buying an original chainsaw chainsaw? The easiest way to do this is serial number. You can find it right under the muffler. This is a tool. Sometimes the manufacturer indicates this information on the clove. It is located somewhat away from the muffler. On the same details of the original product, not only digital information will be presented, but also the company logo.

Problems with cylinders and pistons of the chainsaw

We approached the most unpleasant and complex part from which the repair of the chainsaw at home is folding. It seems that everything is verified and replaced: a new candle is installed, the fuel is flooded to the desired mark, the carburetor is in order, and the chainsaw still does not work.

The wear of the piston-cylinder group can be determined visually

If visual damage is not observed, you need to check the piston rings. To do this, the piston with a worn ring is inserted into the cylinder and swayed by the connecting rod, simulating the engine operation. Backlash means that the rings require replacement.

In order for the chainsaw to work normally, it is necessary to carefully monitor the condition of the spark plugs, as well as to ensure that the gap in the candle of the chainsaw is correctly adjusted. Incorrectly adjusted gap will lead to breakdown. Carry out regular maintenance of technology of this kind, and there will be problems with it as little as possible.

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So many verbal diarrhea a chainsaw, of course, a necessary, important, indispensable thing! And what gap in the candle should not be said. DEMAGOGY!

How to check the magneto chainsaw

Spare parts for chainsaws and trimmers with mail delivery throughout the country with cash on delivery.

• Spare parts for chainsaws
• Cylinder-piston groups of chainsaws
• Carburetors of the chainsaw
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• The ignition coils of the chainsaws
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• Clutch of chainsaws
• Oil pumps
• The crankshafts of the chainsaw
• Flaim chainsaws
• The bearings of the chainsaw
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• Mufflers of the chainsaw
• Spare parts for trimmers
• Trimmeres cylinder-piston groups
• Carburetors for trimmers (benzos)
• Starters for trimmers (benzos)
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• TRAMMER FLASS (BAMS)
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Ignition coil (magneto). Checking health and gleaming.

Often we encounter situations when the instrument users come with a faulty ignition. Often it really turns out to be faulty, but often the ignition coil to the breakdown of the tool does not have. Below are described acts to check the serviceability of the ignition coil.

Assessment of the current state of coil.

Before starting the ignition coil, it is worth checking the serviceability of the entire circuit. Make the next:

• visually evaluate the absence of cracks and visible flaws on the reel body
• contamination of conductive parts and nodes
• serviceability and isolation of high.voltage wires, contacts of wires, reliability of their attachment, lack of rust in places of fastening
• Check the condition of the candle cap: often it is torn off from the high.voltage wire and try to return in “improvised” ways. Remember: any “snot” in this place lower the quality of the electronic arc of a candle
• Check the serviceability of the candle. The quality of our gasoline does not allow a candle to “live for a long time”
• Check the operability of the circuit switch. Especially burning for Chinese saw and trimmers.

The meaning of these actions is to exclude all the elements of the chain from the list of probable defects, not counting the coil. If everything is in order we are moving next.

Why do you need a good spark.

The quality of the spark is determined by its ability to set fire to a correctly formed air-fuel mixture in working criteria. A weak spark in the criteria for lean pressure and temperature in the combustion chamber cannot do this. Ignition occurs later or does not occur at all. A convexity appears in the operation of the motor, the motor does not gain momentum, vibration, detonation appears, the effect of a “blast shock” may seem in the starter.

How to check the ignition coil on the chainsaw

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The ignition of the chainsaw (magneto, flywheel)

Spare parts for chainsaws. The ignition coil of the chainsaw (magneto 60).

The insidiousness of this breakdown lies in the fact that the diagnosis below the above methods does not give 100 percent conviction of the performance of the ignition reel. Such implicit breakdown, when there seems to be a spark, but it is not completely true, often misleads and forces the difficulties with the ignition coil to a carburetor malfunction. Ordinary acts in such cases. This is an increase in fuel supply. It turns out that such a spark can set fire to the enriched mixture, but there is no correct. But the introduction of an enriched consistency leads to the rejection of the cylinder-piston group and muffler. Therefore, in such controversial situations, check both the carburetor and the ignition coil again.

Checking the ignition coil.

In order to exclude probable malfunctions from the wiring and shutdown buttons, it may be during the check to disconnect the control wires from the coil.

• Measurement of reel resistances. This method is not always applicable: VO-1, you should know the characteristics of the resistance resistance of the coil windings. Secondly, ignition, in addition to the inductance coil, contains semiconductor elements to form a suitable high-voltage pulse. Therefore, when trying to call Magneto through a high.voltage and minus wire, we will receive an indication “Rupture of the chain” or tremendous resistance. If the chain is still nicknamed, then most likely this is a sign of a malfunction.
• Using a device that checks the presence of a spark. It is installed in the gap of the chain between the candles and the high.voltage wire of the ignition coil. The device is expensive and is used in the main in severe service centers.
• With a candle. Unscrew the candle and attach its case to the cylinder. Pull the starter and watch the spark between her contacts. This Medtod is approximate and does not give a complete idea of ​​the state of the ignition coil, because the candle is not “under pressure” and the flywheel will spin more frozen due to the lack of compression in the engine (the candle is turned)
• “Barbar” method. It is used at their own peril and risk in hopeless situations.

Ignition malfunctions

Most often we think about repair after the chainsaw stopped starting, or visual signs of serious breakdowns appeared.

Signs of ignition malfunction:

• The chainsaw is started, but it works unevenly (troit), often sneezes and shoots;
• The power of the chainsaw fell noticeably;
• With a sharp press on the accelerator, failures are observed in the operation of the engine;
• The chainsaw is poorly started on cold, very troit until it warms up;
• Fuel consumption has increased significantly;

If such flaws appeared in your chainsaw, then it is time to conduct diagnostics, adjustment, and possibly repairing the ignition system.

Determining the localization of a malfunction:

First of all, it is necessary to inspect the candle, if a lot of soot has accumulated on it, then the cause of the malfunction is most likely associated with the work of the carburetor, the piston group or the quality of the fuel. If visually the candle looks good, it does not throw it and it is dry. make sure there is a spark.

• Remove the candle, put the ignition cable on it;
• Using pliers with isolated handles, press the candle thread to the motor body;
• Sharply pull the starter handle and make sure there is a spark;

If there is no spark, we change the spark plug to a new one and test again. After making sure there is a spark, start the engine. But what to do, even if there is no spark on a good candle? We continue the search:

• Test an electric cable for a cliff and insufficient contact with the spark plug. We check the serviceability of the spring in the cap of the nursing and the presence of contact with the armored vehicle;

To check the serviceability of the wiring, it is best to use the tester.

You can set the right gap with a probe, they are not a deficit and are available for a small fee.

Diagnosis of a malfunction multimeter

It is possible to determine the malfunction of the ignition coil can be determined by the so.called hardware method. However, for this you must have a multimeter with which diagnostics is carried out.

Step.by.step diagnosis of ignition by multimeter:

• We set the multimeter to the position in which the arrow is at a mark of 200 Ohms.
• We study the instructions of the chainsaw. We find out the optimal resistance for the coil winding installed on our model (in most modern chainsaws this indicator ranges from 3-5 Ohms.);
• We connect the multimeter to the primary winding of the coil and measure the resistance, if it is normal. continue testing;
• We connect the multimeter to the secondary winding of the coil, compare the obtained readings with the operation manual;
• We connect the multimeter to the coil hole into which the wires are inserted. If the device gives normal indicators, we come to the conclusion that the coil is serviceable. If the measurement results are far from optimal, you will have to replace the node (coil) with a new one;

Step.by.step adjustment of the fuel of the chainsaw:

• Diagnose a malfunction;
• We dismantle the protective cover;
• Remove the module with a nursing and electric cable. We conduct their visual inspection, if necessary, replace with a new one;
• Install the ignition module, but do not tighten the mounting screws to the stop;

We determine a plot with a magnet on the flywheel;

Important: special attention, when repairing the ignition of a chainsaw, should be given to put the correct clearance between the module and the flywheel.

You should also check if the flywheel clings to the module counterweight. If this happens, perhaps you have failed a bearing or a backlash has formed on the shaft.

Replacing parts of the gaspile ignition system

Some early electronic ignition systems consisted of two parts. the launch module and coil. Today they are united in one part. On saws with double ignition systems, the trigger module can be replaced without replacing the coil. This is easy work, as a trigger is usually installed with a pair of screws. When replacing this part, just remove the old module and install the new one in its place. Just make sure the new module has a good foundation. If you notice any corrosion on installation connections or if the screws are not tightly tightened, this may be your ignition problem. The modules should be well connected.

Replacing the coil is a little more difficult. The ignition coil is mounted in the fan housing next to the flywheel. The module in contact with the magnetic field of the magneto Makhovik, produces energy for the spark and contains a reference to the ignition ahead. When replacing the coil, remove the old coil and inspect it. Look for damage from contact with the flywheel. The contact between the coil and the flywheel can be caused by the weakening of the screws or wear of the main crankshaft bearing.

Even if you do not see any damage, check the crankshaft bearing. If you feel the movement and backlash in this bearing, replace the bearing. Also inspect the flywheel. If everything looks good, install a new coil. The base of the coil must be installed about 1. 1.5 mm above the magnets on the flywheel. If you do not have petals, try using a business card or a piece of a pack of cigarettes as a spacer. Turn the flywheel so that the magnets stand opposite the coil. With a gasket on the spot, tighten the fasteners of the coil screws remove the gasket.

When replacing the coil, the gap should be installed perfectly to guarantee that the flywheel does not apply to the coil in any place of its rotation. It is also not acceptable to use thick cardboard and thick paper, the gap must be appropriate, pay special attention to this.

Check the ignition coil on the chainsaw

If preliminary actions did not help in identifying the cause of malfunctions of the chainsaw, then it is necessary to check the ignition coil of the saw. Diagnosis is performed in several stages:

• Measure the resistance of the coil using a multimeter. To do this, you should know the optimal parameters that are indicated in the instruction manual. However, due to the use of semiconductor elements in the system, when trying to “call” the coil, the result will be the indication of the “rupture of the chain”. This is fine. A sign of a malfunction is a positive verification result. T. e. If you managed to determine the resistance of the coil using a special tool, then it is definitely faulty.
• Check the presence of a spark with a special device. This device should be installed in the rupture of the chain located between the candle and the high.voltage output of the ignition coil of the saw. Indicators will be visible on the display. This verification method is more often used in service centers, since the device necessary for this is expensive, and the costs will not be comparable to the benefit rendered.
• Coil testing with a candle, t. e.Perform homemade ignition. To do this, it must be turned, and then attach to the cylinder with the case. Now you need to pull the starter and watch the spark. But this method gives only an approximate result, since the flywheel is spinning faster due to the unnatural position of the candle.

If none of these methods has given the result or, if necessary, the check in the field, can be done as follows:

• Remove the cap from the candle, insert a nail without a hat at a distance of 6-7 mm from the cylinder into the core. This must be done as carefully as possible so as not to damage the part.
• Perform actions that are required to be done at the tool factory. Now you need to look at the presence of a spark and its color. If there is no malfunction, then the spark will be strong, and the color is bright blue.

This method can be used in extreme cases and only if there are no electronic nodes, it is important to comply with the rules:

• You can not completely twist the candle, as this can lead to a faster rotation of the flywheel, which is not the right mode of engine operation;
• You need to place at a distance that corresponds to the compression model and the dielectric properties of the fuel mixture, so this parameter can be viewed in the instructions (the value of 6-7 mm is averaged).

Ignition malfunctions

Most often we think about repair after the chainsaw stopped starting, or visual signs of serious breakdowns appeared.

Signs of ignition malfunction:

• The chainsaw is started, but it works unevenly (troit), often sneezes and shoots;
• The power of the chainsaw fell noticeably;
• With a sharp press on the accelerator, failures are observed in the operation of the engine;
• The chainsaw is poorly started on cold, very troit until it warms up;
• Fuel consumption has increased significantly;

If such flaws appeared in your chainsaw, then it is time to conduct diagnostics, adjustment, and possibly repairing the ignition system.

Determining the localization of a malfunction:

First of all, it is necessary to inspect the candle, if a lot of soot has accumulated on it, then the cause of the malfunction is most likely associated with the work of the carburetor, the piston group or the quality of the fuel. If visually the candle looks good, it does not throw it and it is dry. make sure there is a spark.

• Remove the candle, put the ignition cable on it;
• Using pliers with isolated handles, press the candle thread to the motor body;
• Sharply pull the starter handle and make sure there is a spark;

If there is no spark, we change the spark plug to a new one and test again. After making sure there is a spark, start the engine. But what to do, even if there is no spark on a good candle? We continue the search:

Test an electric cable for a cliff and insufficient contact with the spark plug. We check the serviceability of the spring in the cap of the nursing and the presence of contact with the armored vehicle;

To check the serviceability of the wiring, it is best to use the tester.

You can set the right gap with a probe, they are not a deficit and are available for a small fee.

Diagnosis of a malfunction multimeter

It is possible to determine the malfunction of the ignition coil can be determined by the so.called hardware method. However, for this you must have a multimeter with which diagnostics is carried out.

Step.by.step diagnosis of ignition by multimeter:

• We set the multimeter to the position in which the arrow is at a mark of 200 Ohms.
• We study the instructions of the chainsaw. We find out the optimal resistance for the coil winding installed on our model (in most modern chainsaws this indicator ranges from 3-5 Ohms.);
• We connect the multimeter to the primary winding of the coil and measure the resistance, if it is normal. continue testing;
• We connect the multimeter to the secondary winding of the coil, compare the obtained readings with the operation manual;
• We connect the multimeter to the coil hole into which the wires are inserted. If the device gives normal indicators, we come to the conclusion that the coil is serviceable. If the measurement results are far from optimal, you will have to replace the node (coil) with a new one;

Step.by.step adjustment of the fuel of the chainsaw:

• Diagnose a malfunction;
• We dismantle the protective cover;
• Remove the module with a nursing and electric cable. We conduct their visual inspection, if necessary, replace with a new one;
• Install the ignition module, but do not tighten the mounting screws to the stop;

We determine a plot with a magnet on the flywheel;

You should also check if the flywheel clings to the module counterweight. If this happens, perhaps you have failed a bearing or a backlash has formed on the shaft.

Husqvarna saw disassembly algorithm

The process of disassembling the chainsaw of Husqvarna is quite simple. In order to do everything right and not break the parts of the case or CPG, it is necessary to disassemble in the following order:

• Upper cover.
• The brake cover of the quapi and saw.
• Starter.
• Flywheel and clutch.
• The front handle.
• Carburetor.
• Oil pump.
• Engine.

Depending on the model, Khuskvarvar is, the disassembly order may vary slightly.

Important: Before proceeding to disassemble the chainsaw, it is necessary to clean it. When working with a saw, a lot of shavings and wood dust forms, which, when disassembled, can fall into the internal parts of the Husqvarna chainsaw

Removing the side cover and saw

The side cover or it is also called the brake cover of the saw chain, is held with two nuts by thirteen.

By unscrewing the nut, the lid is removed from the guide hairpins, after which you can remove the tire and the chain from the chainsaw. In some models, Husqvarna saws a special mechanism that allows you to dismantle the lid and saw headset without the help of special tools.

Starter

The starter is located on the right side of the Khuskvarna and holds on several screws. By promoting which, you can easily remove the starter and thereby gain access to the flywheel and ignition coil.

Removing a flywheel and clutch

In order to promote the flywheel nut, it is necessary to unscrew the spark plug and install the piston stopper instead.

As soon as the piston stopper is installed in the cylinder, you can spin the nut of the flywheel. A field of the nut is untwisted, it is necessary using a hammer and a grooved made of soft material, apply one sharp blow by installing a pierce on the shaft of the flywheel fastener. This is necessary to dismantle the flywheel from the shaft, t. to. The design provides for the installation and tightening of this element with great effort.

Learn more about how to remove the flywheel from the Husqvarna chainsaw, as well as how to completely disassemble the saw, you can watch the video. The master step by step explains the whole process and demonstrates all the necessary tools:

In order to promote the clutch, a special key is required. If there is no key, then it can be made from the old head by twenty.two, turning it in a certain way with the help of emery.

Do not try to unscrew the clutch with a hammer and chisel, as some craftsmen advise. Using these tools, you run the risk of breaking the clutch body and increase the cost of repairs. It can also damage the crankshaft bearings.

Removing the front handle Huskvarna is quite simple, t. to. it is attached to the shock absorbers using screws.

Air filter and carburetor

To remove the carburetor, it is necessary to disconnect the fuel hose and traction of the damper from it, it is convenient to do this after the air filter is dismantled, which is installed immediately behind the carburetor and retained using two nuts by 10. After the air filter is dismantled, and the fuel hose and traction are disconnected, just pull the carburetor over yourself and remove it from the hairpins.

Oil pump

On the Khuskvarn, the oil pump is installed on the right side of the chainsaw. You can remove it only after the clutch is promoted. You do not need a special tool for removal, t.to. The mounting screws are made for a regular cross screwdriver. After the screws are twisted, it is necessary to raise the pump and disconnect the oil hoses from it.

Ignition malfunctions

Most often we think about repair after the chainsaw stopped starting, or visual signs of serious breakdowns appeared.

Signs of ignition malfunction:

• The chainsaw is started, but it works unevenly (troit), often sneezes and shoots;
• The power of the chainsaw fell noticeably;
• With a sharp press on the accelerator, failures are observed in the operation of the engine;
• The chainsaw is poorly started on cold, very troit until it warms up;
• Fuel consumption has increased significantly;

If such flaws appeared in your chainsaw, then it is time to conduct diagnostics, adjustment, and possibly repairing the ignition system.

Determining the localization of a malfunction:

First of all, it is necessary to inspect the candle, if a lot of soot has accumulated on it, then the cause of the malfunction is most likely associated with the work of the carburetor, the piston group or the quality of the fuel. If visually the candle looks good, it does not throw it and it is dry. make sure there is a spark.

• Remove the candle, put the ignition cable on it;
• Using pliers with isolated handles, press the candle thread to the motor body;
• Sharply pull the starter handle and make sure there is a spark;

If there is no spark, we change the spark plug to a new one and test again. After making sure there is a spark, start the engine. But what to do, even if there is no spark on a good candle? We continue the search:

Test an electric cable for a cliff and insufficient contact with the spark plug. We check the serviceability of the spring in the cap of the nursing and the presence of contact with the armored vehicle;

To check the serviceability of the wiring, it is best to use the tester.

You can set the right gap with a probe, they are not a deficit and are available for a small fee.

Diagnosis of a malfunction multimeter

It is possible to determine the malfunction of the ignition coil can be determined by the so.called hardware method. However, for this you must have a multimeter with which diagnostics is carried out.

Step.by.step diagnosis of ignition by multimeter:

• We set the multimeter to the position in which the arrow is at a mark of 200 Ohms.
• We study the instructions of the chainsaw. We find out the optimal resistance for the coil winding installed on our model (in most modern chainsaws this indicator ranges from 3-5 Ohms.);
• We connect the multimeter to the primary winding of the coil and measure the resistance, if it is normal. continue testing;
• We connect the multimeter to the secondary winding of the coil, compare the obtained readings with the operation manual;
• We connect the multimeter to the coil hole into which the wires are inserted. If the device gives normal indicators, we come to the conclusion that the coil is serviceable. If the measurement results are far from optimal, you will have to replace the node (coil) with a new one;

Step.by.step adjustment of the fuel of the chainsaw:

• Diagnose a malfunction;
• We dismantle the protective cover;
• Remove the module with a nursing and electric cable. We conduct their visual inspection, if necessary, replace with a new one;
• Install the ignition module, but do not tighten the mounting screws to the stop;

We determine a plot with a magnet on the flywheel;

You should also check if the flywheel clings to the module counterweight. If this happens, perhaps you have failed a bearing or a backlash has formed on the shaft.

What is required to eliminate breakdowns

Rosopiela repair does not require a large arsenal of home tools. First of all, this is:

• Sprinkles. Cross and flat, to remove the casing, chain or other components that are attached with flat bolts and will definitely be needed to efficiently carry out the repair of the chainsaw;
• A set of unit and wings of different sizes. They will be needed when disassembling the engine and other moving parts. Repair of such parts sometimes involves dry cleaning, so they will be needed to scrap excess dirt;
• Candle removal key;
• the chart of the chainsaw itself to know how certain nodes work and how to serve them correctly.

How the focus of the chainsaw works and how the ignition of the chainship

The device of the carburetor engine does not depend on the tool model. Therefore, we can talk about the standard gaspile ignition system. It consists of the following elements:

• Magneto. Is an alternating current generator. It is necessary to supply the spark plug with electric shock. Outwardly, this part looks like a motionless winding of an inductance and permanent magnet coil, which is recorded on a flywheel. The latter rotates simultaneously with the crankshaft of the engine.
• Spark plug.
• Electric cable that connects 2 previous elements.
• Device shutdown buttons.

The ignition circuit of the chainsaw is simple. After the start of the tool, thanks to the movement of the flywheel and crankshaft, the rotating magnetic field is formed. It in the existing winding creates a moving force that transforms into stress. This potential is enough for the formation of a spark.

Differences in various models of chainsaws can only be whether the contact or contactless magneto is used. In the first case, one conclusion of the winding goes to the candle, and the second. first to the disconnection button, and then through it to the ground. In the second case, the device has a capacitor, which when discharged forms a current.

The main malfunctions and their elimination

If you run the saw the first time, there may be several reasons. Most often, the problem is related to the spark plug:

• wear of the electrode or damage to the ceramic insulator;
• loose fit of a removable cap (if any);
• The sparking along the ceramic winding, a sign of which is the brown residue on the outer shell;
• Cracks in the cap of candles (saw with such a problem will continue to work, but can hurt the user when touching).

If there were no problems with the candle, it is recommended to inspect the wires coming from the coil. They can be broken or have other mechanical damage. Ruptures of the wires inside the isolation are possible, therefore, sometimes these disorders cannot be detected by visual examination.

The cause of the breakdown may be shutdown. It is easy to check them. To do this, disconnect the wires from the module, and then check the ignition. If after disconnecting the spark appears, then the switch must be replaced.

How the focus of the chainsaw works and how the ignition of the chainship

The device of the carburetor engine does not depend on the tool model. Therefore, we can talk about the standard gaspile ignition system. It consists of the following elements:

• Magneto. Is an alternating current generator. It is necessary to supply the spark plug with electric shock. Outwardly, this part looks like a motionless winding of an inductance and permanent magnet coil, which is recorded on a flywheel. The latter rotates simultaneously with the crankshaft of the engine.
• Spark plug.
• Electric cable that connects 2 previous elements.
• Device shutdown buttons.

The ignition circuit of the chainsaw is simple. After the start of the tool, thanks to the movement of the flywheel and crankshaft, the rotating magnetic field is formed. It in the existing winding creates a moving force that transforms into stress. This potential is enough for the formation of a spark.

How to adjust the ignition on friendship

The spark on the candle should flash strictly at a certain moment. On friendship-when a piston with a portion of the fuel-air mixture approaches the candle, not reaching 4 mm to VMT. Only with a precisely adjusted moment of sparking will the engine work normally. Deviations are called early or late ignition.

With small deviations in one direction or another, the engine will work worse (shortage of power, overheating, excess of fuel, poor start). With more significant ones, it will not work at all. Can shoot at the exhaust system or at the carburetor.

Mechanical chain breaker Friendship is simply regulated.

Before adjustment, you need to check. perhaps the attachment of the entire system platform is weakened and it was checked. It is checked by the coincidence of factory labels (screens) on a metallic.based ignition and engine crankcase. As a rule, they are knocked out in the form of strips in the right upper part of the ignition and must match. If there is a displacement, it is adjusted.

The maximum gap (at the peak of discrepancies) between fists (contacts) should be from 0.2 to 0.4 mm. Ideally 0.3 mm. Checked by a calibrated probe in the position of the piston NMT. This gap can increase above the permissible due to a decrease in the thickness of the contacts (burnout, grinding during cleaning). It is corrected up to 0.2-0.4 mm by turning the adjusting screw due to the eccentric, with the weakened attachment of the site of the entire interrupt.

But the spark arises at the time of the start of the contact connector, therefore its adjustment is more important than the maximum gap in the NMT. Когда поршень не доходит до ВМТ 4 мм, контакты прерывателя должны начинать расходиться. This provision is also regulated by turning the screw due to the eccentric. Most often this moment is checked visually.

The minus of the battery is connected to the weight of the engine. One lamp indicator is connected to the plus of the battery. The second wire of the indicator bulb is pressed to the case of the mobile isolated contact. If the contacts are closed, the light shines.

The flywheel is slightly cranked by hand. As soon as the contacts open, the bulb goes out. This is the moment of the beginning of the connecting to the contacts and the formation of a spark. The piston at this moment should not be in the position did not reach the VMT 4 mm.

How to determine the integrated ignition?

Features of the design of the built.in ignition coil guarantee the coincidence between the optimal factory position of the moving piston and the discharge of the candle. During operation of 4-stroke power units, the spark is obliged to slip even before the piston return to the extreme upper position. This is due to the fact that the combustion of fuel such engines takes more time. In their factory device, the speed of operation parts of the internal combustion engine is equal to the speed of the planned ignition of the filled combustible. In this regard, the piston manages to go a certain path from the moment of the instant passage of the created spark to the place where the candle is located, to the period for which burning gases guaranteed to create extremely high pressure on the pressure.

During the mass assembly of engines in the standard factory conditions, manufacturers do not adjust the ignition. Instead, marks are left on rotating elements, which must be combined during installation.

Failed search algorithm

In all other cases, the search for ignition malfunctions begin at the end and in order. After each step, check the spark.

• Change the old candle to the guaranteed working.
• If the model has a removable candle cap, it is removed, a bare candle wire is closed to a mass with a gap, approximately like a candle. Pull the starter. If there is a spark, problems in the cap. It is eliminated.
• Change the candle wire where the ability to dismantle it from the source is provided.
• Visually inspect the wires from the switch. With vibration, in case of contact with metal, they can be damaged. If there is a friction place, the wire is changed, even if there is no external insulation damage. To check the wire, you can use a tester or multimeter.

On this, small and easily eliminated problems end. If the problem is not solved, then the reason is more serious.

Modern coils and ignition systems on most chainsaws are very reliable. They are designed for the life of even more than the entire chainsaw in general. They do not have mechanical moving details, as in old cam systems. They are insulated enough from clogging and moisture.

If an interval closing in a coil occurs in a random factory marriage or electronics fails, these parts are not subject to repair. It will take a replacement for new.

There is not a rare breakdown of a mechanical property. Due to wear or destruction of the crankshaft bearing on it, backlash appears. And then the magnetic rotor begins to touch the case of the ignition system, inside which it rotates. This is a serious breakdown. It will be necessary to “cut” (disassemble) the entire engine, replace the bearing, and collect everything in place.

The role of the spark plug

The spark plug in the STIHL chain engine or in any engine is a simple device. Every time the engine flywheel completes the revolution, the magnet attached to it induces the electric current in static magnet. This current generates a spark through the electrodes of the plug fork. The spark ignites the fuel-air mixture in the combustion chamber, and this drives the piston, forces the engine to work. If the electrodes of the plug are located far from each other or covered with oil, carbon deposits, sparking is intermittent or weak, which leads to incomplete combustion and low engine characteristics.

The chainsaw is stalled and not start

If the tool is stalled and not starting to start, it is worth checking the presence of fuel in the tank. Oddly enough, it sounds, but many people forget about this and, if such a situation arises, they immediately try to repair the tool, which can lead to serious breakdowns.

In a situation when I drank it stalled, and there is still gasoline in the tank, you need to evaluate how the saw worked until this point. Maybe when working at the last moment there was an extraneous sound, rattle, ringing, power loss, or the tool stopped abruptly. All this will allow to pre.assess the situation.

The engine jammed

Quite often there is a situation when the saw worked and sharply stalled, the cause of which was the jamming of the engine, which in turn occurred as a result of a break in the piston skirt, destruction of the crankshaft bearing, the outbuilding ring of the piston fingers or the break of the piston ring.

The engine jamming is easy to determine if you pull the starter cord. In the case when the starter does not turn, most likely, it jammed, and further repair is possible only in the service center.

The cliff of the fuel wire

During the operation of the chainsaw, vibration occurs, which can cause damage or breakthrough of the fuel line of the chainsaw. In this case, the chainsaw will stall and it will be impossible to start the launch. To diagnose a malfunction, you need to conduct an inspection and determine the presence of fuel fuel.

Overheat

Overheating of the engine during operation may cause the saw to be stalled and will not start. Overheating is quite dangerous, as it can cause melting the piston in the cylinder and jamming of the engine. In the first cases of overheating, it is worth diagnosing the tool for the availability of extraneous air leaks to the engine, and adjusting the carburetor.

Air leakage, as well as the correct adjustment of the carburetor affects the maximum number of engine speeds and its lubricant, which in turn causes overheating and shaking the tool.