How to check the ignition coil of the chainsaw. Choice by model

How to check the ignition module of the chainsaw

The ignition system of the chainsaws is a whole complex of elements with which a spark appears when the engine starts. It is needed in order to set fire to fuel and bring the motor into a state of full.fledged long.term work.

The main element of the ignition system is a candle, which should be set on fire whenever the engine is in the right work cycle.

And although the system is reliable and thoughtful, it is sometimes required to repair it, so the user needs to know how its chainsaws are arranged, and also what he can do to repair its ignition system.

Chainsaw. this is not such a complicated device. However, in case of detection of a malfunction, it is necessary to have at least basic knowledge in order to find and eliminate the defect that has arisen. Let’s look at the main malfunctions of the chainsaws, find out what they are connected with, and also analyze the main steps to correct breakdowns.

The most important thing, before proceeding to repair, is the correct determination of the malfunction. And the reasons for the inoperability of each element can be several. Therefore, before starting disassembling the chainsaw, you need to try to determine what the refusal is related to.

As a rule, the refusal of the chainsaws is caused by a malfunction of the engine or the occurrence of breakdowns in its other nodes.

In other nodes, most often malfunctions occur due to failures of the brake mechanism, lubrication system, clutch coupling, tires, etc.

Let’s look at both groups of malfunctions so that you can determine the cause of the breakdown on your own, if necessary, without contacting the repair workshop.

The most vulnerable element of the carburetor engine is the candle. It allows you to judge the probable causes of the malfunction of individual gasoline engine units. The following procedure is recommended.

In the process of installing a new electric module on the engine, you should configure Magneto’s gap. The optimal distance between the flywheel and the ignition coil is for most chainsaws 0.2-0.4 mm.

With such a small gap, it will not be possible to use an affordable measuring tool for direct measurement. In practice, for the Husqvarna saw, a template is used in the form of a gasket carved from thin and flexible sheet material for the necessary thickness. It is clamped in the space between the flywheel and the reel when installing it, and then stretched out.

In order not to resort to ignition adjustment, operate the tool carefully, avoiding shock. In particular, this applies to chainsaws with electronic chips in the ignition system, as they are very sensitive to mechanical damage.

  • The engine will not start;
  • starts, but stalls;
  • It works unstable;
  • does not develop power, t.e. It works normally at idle, but stalls under load.

When repairing a chainsaw at home, you need to act by exclusion. The possible causes of the malfunction remains to check one by one, starting with the development of those whose verification is not the elimination of which takes less time (you do not work about the device, see the operation of a two.stroke engine here).

Ignition system. Almost all types of engine malfunctions listed above may be called the ignition system failures. Therefore, when they occur, it makes sense to start searching for a malfunction from the candle. This is all the more justified that the state of the latter can give useful information about the operation of the fuel system. So, when a problem occurs, you need to turn out the candle and inspect it.

The wire is disconnected, and the candle is twisted with a special key.

If the candle is dry, this means that the problem is most likely not in the ignition system, but not admission to the fuel mixture cylinder. You can wrap the candle back and take for the fuel system. If the candle is strongly sprayed with the fuel mixture, then there is its excess. This can happen from the dilution of the carburetor or violation of the launch rules.

The presence of a large amount of black carrier also indicates malfunctions in the fuel system.

The ratio between oil and gasoline in the mixture may be disturbed, the carburetor is not adjusted or poor.quality oil is used. The candle is washed in gasoline, cleaned with a needle or an awl from the carbon, clean the electrodes with a small skin and installed in place.

In all these cases, it will not be superfluous to check the gap between the electrodes of the candle. Depending on its brand, it should be in the interval of 0.5-0.65 mm. You need to check the sealing of the candle. With its worn out or damage, the tightness of the combustion chamber may not be ensured, which leads to a decrease in compression in the cylinder and problems in the engine operation.

Even if in the case of checking the candle there is large reasons to believe that the malfunction is in the fuel system, you need to check the candle for the presence of a spark. The ignition module of a foreign chainsaw then you need to check the gap between the coil. At least in order to be sure that everything is in order with this. How to check the ignition coil of the chainsaw with a tester, the Husqvarna module. For this:

  • put on the spark plug on the candle;
  • Using pliers with insulated handles, apply a thread or a candle nut to the cylinder;
  • pull the header’s handle and watch. there is a spark or it is not.

In the absence of a spark, you just need to replace the candle. If the new candle does not have a spark, you need to check the condition of the high.voltage wire for the presence of a cliff and contact with the candle.

The reason for the lack of a spark can be a faulty ignition module or a disruption of the gap between it and the magneto pipeline of the flywheel. It should be equal to 0.2 mm. The disruption of the gap becomes especially probable if before this was the disassembly of the saw from the filming of the flywheel and the ignition module. The gap is exhibited with a gasket with a thickness of 0.2 mm placed between the boss of the flywheel and the ignition module. Failed ignition module should be replaced.

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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.

check, ignition, coil, chainsaw

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.

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.

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.

How to check the ignition coil on the chainsaw

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Insufficient intake of the fuel mixture from the carburetor to the cylinder or a violation of the correct ratio between fuel and air mixed in the carburetor can occur for several reasons: due to the air filter, unexplored carburetor, clogging its channels or mesh-filter.

As a rule, the repair of the chainsaws is not complete without cleaning the air filter, since it is polluted quite quickly. When this happens, the flow of air into the carburetor decreases, the fuel mixture at the exit from it is too enriched, which violates the normal operation of the engine. Removing a dirty filter for cleaning must be carefully so that the dirt from it does not get into the carburetor. The filter should be cleaned or washed in water with some detergent, dried and installed back.

Carburetor’s resolution is eliminated by its adjustment. This is usually done using three screws. maximum and minimum revolutions and a blank screw. Adjustment should be carried out in strict accordance with the instructions, the non.compliance of which can lead to engine breakdown. Some saw manufacturers leave only one adjusting screw (idle turnover).

If the adjustment of the carburetor did not help, you need to clean its channels and a filter net, and at the same time check the integrity of the membrane. How to check the ignition module for. Carburetor. One of the most complex devices of the chainsaw, so you need to proceed with its disassembly and cleaning with a complete understanding of the responsibility of this operation.

Below is a diagram of another carburetor of a chainsaw.

If there is no experience and confidence in their own abilities, it is better to entrust the carburetor of the chainsaw carburetor to a service center specialist. Sometimes for high.quality cleaning the carburetor, ultrasound is used.

Muffler. Often the cause of the engine malfunction, especially when the engine works normally at low speeds and stalls under load, becomes clogging the combustion products of the sparkle of the silencer, which prevents the normal exhaust. Repair in this case consists in removing the silencer, disassembling (if it is piercing) and its wet cleaning from the soil using detergents.

One of the reasons why the muffler might clog. This is the use of a fuel mixture with an excess amount of oil (the amount of oil is more than the manufacturer recommends), and the use of either not designed for two.stroke oil or low.quality oil engines.

The cylinder-piston group. The malfunctions of the cylinder-piston group belong to the most serious. This is the wear of the cylinder and the piston, scratches and bully on their surface, wear or marketing in the grooves of piston rings, wear of the crankshaft bearings. Most of these malfunctions leads to a drop in pressure in the cylinder and, as a result, to the inability to start the engine, or its inability to give full power. There are several ways to assess the state of the cylinder-piston group (CPG).

You can remove the muffler and look in the opening window in which part of the side surface of the cylinder is visible. Ignition module How to check regarding the ignition of a chainsaw. Despite the limited review, the general idea of ​​the state of the CPG in this way can still be obtained.

It is useful to measure the compression in the engine, which is quite informative in relation to the state of the parts of the CPG. The operation is carried out using a compressometer installed in the candle hole.

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The crankshaft is turned using an electric motor (drill) with a flexible shaft or manually starter, while controlling the pressure according to the pressure gauge. How to check the ignition module by a multimeter. The latter in the efficient chainsaw should be at least 8-9 atm (0.8-0.9 MPa). With its decrease, the engine power falls. At a pressure of five atm, the engine may work, but only at idle.

You can accurately evaluate the state of the CPH only by completely dismantling the engine. disconnecting the crankcase from the cylinder and extracting the piston. If the latter has bullying, chips or deep scratches, it needs to be changed. In relation to the cylinder, when developing or damaged the surface, it is possible to waste it under the repair size.

About the chainsaw and its inoperability

Chainsaw. installation in itself is not so complicated. But having the smallest initial knowledge is extremely important to find and eliminate any defect.

Modern electronics were so progressed that it also revolutioned in the world of tools. The saws of our days are light and powerful at the same time, equipped with electronic ignition systems of the ESZ.

The ignition system of the chainsaw

Not so long ago, the ignition systems drank cam. This carried a lot of shortcomings: severity, complexity, high cost and much more. And the most important drawback of the archaic ignition system is the difficulty of the plant. Some of the systems of models of saws could not work out a spark sufficient for the outbreak at the speed of rotation of the crankshaft.

Modern systems are almost reliable. The models saw light and strong, the coil is made more professionally and serves its term almost without fail. However, there are also problems, but in most cases they can be fixed on their own.

Consider the main types of chainsaw malfunctions associated with the flywheel and ignition system.

As a rule, the most common ailment of modern chainsaws, implies the lack of a supply spark. The same directly depends on the shift of the lumen (clearance) between Babina and the flywheel.

The problem of the sparks

Common malfunctions of installations are always connected with ICE. Problems arise in the system of ignition of fuel, the fuel flow module, in the internal elements of the engine itself.

As for the other nodes of the chainsaw, the malfunctions there, as a rule, due to the failures of the brake mechanism, poor lubrication, etc.D.

If the difficulties of starting are associated with the engine, then the symptoms are most often observed:

As always, experts recommend identifying fault factors by excluding. In other words, you need to go through the chain, diagnosing each node, each link.

Ignition module

The inoperability of SZ chainsaws is the most common reason due to which the engine engine does not start. In most cases, it is recommended to start searching for a problem from here.

The ignition module of the chainsaw

  • First of all, thoroughly check the spark plug, gently throwing the armored wire from the head and twisting the candle from the nest using a special key;
  • The second is a check of the sparking using the starter twitching with a cap of the armor pipeline on a candle;
  • Checking the gap is the main theme of our article (more below).

So, the malfunction of the spark plug will clearly be evidenced by its sputum. A wet spark device for ignition of the fuel-air mixture suggests that the fuel is an excess of fuel, the carburetor is incorrectly configured or there are malfunctions in SZ.

The candle is checked only after drying. T.e., It must be carefully cleaned with a napkin, drain the insides of the internal combustion engine, clog the feed, and then start a couple of times a starter so that the excess of the combustible mixture comes out.

Then the spark device is put in place, and everything is checked again.

Black Nar on a candle

In general, the spark device can tell a lot about the entire ignition system. If a black fog is observed on the candle, this indicates violations in the communications of the gasoline mixture. Here, either the ratio of gasoline and oil was violated, or the carburetor is required to reconfigure. In some cases, this happens due to poor.quality oil.

A dirty candle is cleaned of a black carbon fiber with a needle or any other sharp object. Then, the electrode is cleaned with sandpaper (zero), until a metallic shine appears. The spark device is returned to the place, everything is checked again.

Next stage: checking sparking. The skirt of the spark device is brought to the cylinder, the starter starts. If a bluish spark slips at a distance of 2-3 mm, everything is fine. The sparking distance of 0.5-1 mm is already considered as a malfunction. There may not be sparks at all, and this is also a big problem. Perhaps this is the case of a cliff of the wire.

And so we approached the topic of our article. The chainsaw may not be launched due to a violation of the gap between the ignition and the Magneto flywheel. This very gap should be within 0.2 mm. It is checked very simply: a special gasket is placed between the flywheel and Babina. If it comes normally, not too free and tight, then the gap is normal.

The flywheel himself drank is round, and checking the gap with an ordinary probe is impossible. It would be more qualified to put a gap according to a special show, but it is not always possible to purchase. Yes, and not everyone can afford to buy a template that is not cheap.

Gap between Magneto and the flywheel

However, in return for the foreign template, you can use a cut strip from a plastic container per 1-2 liters from under the juice.

Advice. It is recommended to cut a plastic tape where there are no relief bumps.

The ignition of the chainsaw. Device, breakdowns and their elimination, reviews

Chainsaw, like any device operating on an internal combustion engine, has a ignition system. She is responsible for ignition of the fuel-air mixture in the motor cylinder. This happens through the supply of an electric discharge that breaks the space between the electrodes of the spark plug.

STIHL MS250 Chainsaw How To Check For Spark Hack: Ignition Coil, Spark Plug, Wire Check

It is clear that no engine will start without ignition of fuel, and will not work. However, the problem is not only this: the quality of the chainsaw is dependent on how accurately the ignition is exhibited. In other words, fuel is ignited on time or in the time. Therefore, a chainsaw with downed settings needs to be repaired. The elimination of the problem can be entrusted to experienced mechanics, but you can repair the ignition of a chainsaw with your own hands.

Important: new chainsaws are delivered with adjusted ignition, there is no need to disassemble and assemble the tool, immediately after the purchase.

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Some Chinese chainsaws are supplied with poor.quality candles. it may make sense to make several spark plugs in the kit.In our review, we will introduce you to the device and the principle of operation of the ignition system, its main problems and ways to eliminate them.

Structural components

All gasoline two.stroke engines have a similar principle of operation, and therefore the ignition system in them has a typical structure and device.

The ignition device of the chainsaw:

  • Magneto: a device that converts the mechanical energy into an electrical energy, provides a current pulse to the lighting of the fuel of the chainsaw;
  • Spend of the ignition: designed to ignite the fuel-air mixture through the category that occurs between the electrodes;

Candles are spark, arc, incandescent and catalytic. In the devices of the chainsaws, spark candles for 2-stroke engines are used. The schematic scheme of the chainsaw is shown in the image.

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;

Spark plug with a nut for a chainsaw

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;

Ignition adjustment

As we have already noted, you can adjust the ignition system both in the workshop and at home. To do this, you will need ordinary wrenches, screwdriver and probe 0.4 mm (you can make a probe with your own hands from improvised materials. ordinary photocopy paper, plastic bottle, etc.P.).

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;
  • The ignition module and the flaws on the flywheel is a plot with a magnet;
  • We set the gap properly, in accordance with the parameters specified in the operation manual;
  • We tighten the screws of the module fastening to the stop, check the settings with the probe, if necessary, we repeat the adjustment;
  • Set the protective cover and check the presence of a spark on the candle;
  • We screw the candle, start a chainsaw;

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

Structural components

All gasoline two.stroke engines have a similar principle of operation, and therefore the ignition system in them has a typical structure and device.

The ignition device of the chainsaw:

  • Magneto: a device that converts the mechanical energy into an electrical energy, provides a current pulse to the lighting of the fuel of the chainsaw;
  • Spend of the ignition: designed to ignite the fuel-air mixture through the category that occurs between the electrodes;
  • Electric cable;
  • Engine shutdown button.

Candles are spark, arc, incandescent and catalytic. In the devices of the chainsaws, spark candles for 2-stroke engines are used. The schematic scheme of the chainsaw is shown in the image.

check, ignition, coil, chainsaw

Ignition Coil Primary & Secondary Resistance Testing

How to check the ignition coil on the chainsaw

To all the big welcome advice Skype: OPK.Vitek tel: 380979677418.

The video tells about the simplicity of adjusting the magnetic gap using the wall of a plastic bottle. Repair.

The insidiousness of such a breakdown is that the diagnosis below does not give one hundred percent confidence in the effectiveness of the ignition coil. Such an implicit breakdown when there is a spark, but this is not entirely correct, often misleads and makes you write off problems with the ignition coil with a malfunction of the carburetor.

Typical actions in such cases. This is an increase in fuel supply. It turns out that the spark can ignite such a spark, but it does not have the right. 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 reel.

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