How to check the ignition coil on a trimmer with a multimeter

How to check the spark plug on a lawn mower. How to check the ignition coil on a chain saw. Proper care for your chainsaw

There’s no doubt that the starting system of any machine is the most important part. And the question:. should arise from its owner, regardless of the presence of a breakage or its serviceability. It is quite real to do it yourself, and we will describe and demonstrate the way of doing it in detail in the video tutorial. In STIHL trimmers, the coil mechanism is checked identically, and in all tools it is also called “magneto”. Specialists would advise that failure of the tool itself often has nothing to do with the coil and vice versa, so it should be checked regardless of the condition of the machine as a whole. Before checking the work it is necessary to assess its condition according to the following points:

  • Look to see if there are any cracks or other defects on the body itself;
  • The absence of dirt on the current-conducting nodes and other elements;
  • the condition of the high-voltage wires: the absence of rust, the reliability of attachment, the presence of contact;
  • the spark plug cap should be securely attached to the high-voltage wire;
  • whether the spark plug works, maybe it is flooded or with a huge layer of soot;
  • whether the circuit breaker works, especially if you have a grass trimmer made in China;

If everything is all right with these components of the grass trimmer, you can move on to the examination of the coil itself, namely, to measure the resistance. If you know the resistance parameters of its windings, this method is acceptable for you. The procedure should be done with the high-voltage and minus wire. After “probing” the instrument, you may get a high resistance or a “Circuit Breaker” reading, and if the circuit is probing, it demonstrates a malfunction. You can also check the special tester, which is called “ohmmeter” and determines the presence of a spark. Place it between the high-voltage coil wire and the spark plugs. Read about other existing methods in the next section. If it is not repairable, a new magneto is quickly available in the appropriate section of the lawnmower parts store.

How do I check the coil on my gasoline-powered lawnmower?

Many people today use a tester to check the parameters of a mechanism. But not everyone is familiar with a multimeter, in fact, a similar device that includes an ammeter, ohmmeter and voltmeter, respectively, they can determine the voltage, current and resistance. This comprehensive device will answer the question: how to check the ignition coil on a chainsaw

  • Checking the Primary Winding. The device is set to measure resistance and is connected to the positive and negative terminals of the winding.
  • The average value should figure in the range from 0.4 to 2.0 ohms. regardless of the company-manufacturer of the machine.
  • If the resistance value is 0, then a short circuit is the main cause of the coil failure.
  • If it shows infinity, it is necessary to look for a broken circuit.
  • The secondary winding is checked by connecting a multimeter to the high-voltage lead and the positive contact.
  • Here the normal value should fall within the range of 6 to 8 kohms. In other types of coils, the parameter can go up to 15 kOhm.

With your own hands to do it is quite realistic, and clarify for yourself whether the obtained parameter is within the operating limits, only you need to be guided by the standards of your specific unit, which you can read about in the manual, as well as in our useful articles. Rarely, the performance of the ignition coil is checked by an oscilloscope, it should also be connected to the coil winding wires, resulting in figures indicating its condition. It is important for users to understand the working condition of the coil, because it affects not only the start of today’s operation of the machine, but the whole mechanism in general. Working spool ignition, as a line for a trimmer for grass trimmer. this is an important part of the whole complex device.

Main malfunctions and troubleshooting

If you can not start the saw the first time, there may be several reasons. Most often the problem is related to the spark plug:

  • electrode wear or damage to the ceramic insulator;
  • loose fit of the removable cover (if any);
  • A stray spark along the ceramic winding, a sign of which is a brown residue on the outer sheath;
  • cracked spark plug cap (a saw with such a problem will still work, but it may hurt the user when touched).

If no problems were found with the spark plug, it is recommended to inspect the wires coming from the coil. They may be broken or have other mechanical damage. There may be tears in the wires inside the insulation, so sometimes you can not detect these irregularities by visual inspection.

The cause of the failure may hide in the toggle switches. It is not difficult to check them. To do this, you must disconnect the wires from the module, and then check the ignition. If the spark appears after disconnecting, the switch needs to be replaced.

Replacement of ignition coil in a trimmer. DIY!

Past the replacement of the ignition coil

, Shows how easy it is to make a groove at home.

The insidiousness of such a failure is that the diagnosis of the following methods does not give a 100 percent confidence in the performance of the ignition coil. Such an implicit failure, when the spark seems to be, but it is not quite right, often misleading and forced to write off difficulties with the ignition coil on the failure of the carburetor. Common actions in such cases. is to increase the fuel supply. It turns out that such a spark can ignite an enriched mixture, but not a proper one. But introduction of enriched consistency leads to sharp wear of the cylinder-piston group and muffler. module, coil ignition brushcutter (lawnmower) How to set the ignition on the trimmer ECHO srm 22 ges. That is why in such disputable situations check both the carburettor and the ignition coil once again.

How to Check the Grass Trimmer Ignition Coil with a Tester. Construction Portal

It is not necessary to move the ignition coil, because it is an integral part of the construction of the vehicle. When it starts to work incorrectly or for some reason fails, then the power unit shows quite serious malfunctions and problems. Faults in the ignition coil can cause the engine to stall or malfunction. The element in question is a part of the tram switch. To avoid ignition coil breakage it is necessary to check it according to the vehicle diagnostic schedule.

General Information

Ignition coils are widely used in carburetor and injector engines. They can be produced in different variations: single, twin, individual, multi-coil. Also the coil can be structurally wound in different ways.

check, ignition, coil, trimmer

It is worth noting that such an element as the ignition coil is the most common transformer. It has two windings (primary and secondary) and a magnetic core. The secondary coil can consist of between 5,000 and 15,000 loops of fine copper wire. The primary coil consists of 100-150 turns of thicker copper wire.

How the ignition system works

To find out the main points that cause the coil to fail, it is necessary to clarify the basic principles of the ignition system, tied to the tumbler. Tumbler itself is nothing but a distributor. It receives a low-voltage discharge, which is converted by the winding into a large magnitude discharge. The contact on the coil is opened by the breaker; in fact, this is when it is fed through the high-voltage wires to each cylinder.

In the cylinder, this discharge is manifested as a spark on the spark plug, which ignites the fuel mixture. If the supply of current to the spark plug is not performed in a timely manner or not at all, then the engine will stop working.

How to check the efficiency of the ignition coil?

If you have problems with the engine, namely with the ignition of fuel, then the eye falls on the specified element in search of malfunction. How to check the ignition coil? The most common method of checking this mechanism is the following sequence of actions:

  • Unscrew the spark plug.
  • Disconnecting the high voltage cable.
  • Now take the wire aside and insert the spark plug into it.
  • Press it against the car body.
  • Start the engine.
  • This should cause a spark on the body of the car.
  • If there is no spark, it indicates that the ignition coil has served its time, it must be replaced.

It is worth noting that this way to check the coil on some machines is not necessary. So, for example, on the Honda, after such a check, the mechanism will immediately spoil.

How to check the functionality of the ignition coil? Before you take on the work, it is worth firmly convinced that it is the one that affects the malfunction of the engine. Therefore, in order not to harm the car unnecessarily, you should conduct a thorough inspection.

Before you check the ignition coil for current from it, you should inspect its housing for chips or breakdowns. After you get to the coil, determine whether there is a breakdown on the body. To understand this, it is sufficient to inspect the adjoining walls to detect burned out dots or black plaque. If such a fact takes place, it indicates the presence of a breakdown. In this case the coil should be replaced with a new one.

A more detailed check

How to check the health of the ignition coil? Once you have checked the coil for breakdowns visually and have not decided to break through the spark to the body, proceed to more detailed methods of searching.

So, how to check the ignition coil and what you need for this? To find a fault in the ignition system, it is necessary to construct a small circuit. The coil itself, the switch, the capacitor, and some kind of battery (power source) must be prepared.

  • connect one contact of the coil to the battery (to the primary winding).
  • We interrupt the second contact through a capacitor and a switch (included between the primary and secondary windings).
  • The output from the secondary winding connects to the switch and capacitor. Make a gap at this contact (for spark breakdown).
  • In the gap you can insert a candle.

When the switch is closed, the spark should occur in the prepared contact gap. Also when checking, you need to inspect what color the spark will be. If it has a reddish tint, it indicates a weak discharge. If such a syndrome is observed, then the coil is hopelessly broken. It also indicates a breakdown between individual turns in the coil.

Thus, we can conclude that, before checking the health of the ignition coil, it is necessary to take a number of measures aimed at the visual detection of the failure of the system.

Checking the ignition coil with a tester

There are a large number of options for calibrating this kind of mechanism. How to check the ignition coil with a tester? To carry out this procedure, it is necessary to take a device with the function of measuring circuit resistance. All the work is done quickly and easily enough.

  • First it is necessary to check for a lack of spark.
  • Connect the plug connected to the commutator to the coil.
  • Connect the voltmeter to terminals 1 and 2.
  • Switch on ignition.
  • The device should show a number equal to the battery voltage.
  • If there are digital discrepancies, it is worth replacing the coil and recalibrating.
check, ignition, coil, trimmer

Checking the coil with a multimeter

How to check the ignition coil with a multimeter:

Lawn mower malfunctions and how to fix them

Any type has a hollow shaft, in which a connecting cable is placed between the motor shaft and the lower gear, which transmits the rotation to the working body with the cutting tool. The carburetor and motor are in the upper part, the gearbox and the working tool are in the lower part, covered by the hood. In the middle part there is a transverse handle in which the control buttons are located. To unload the hands, there is an unloading belt that holds the bar by the operator’s torso.

When choosing a lawn mower, the device with a two-stroke engine is preferable to a four-stroke. Two-stroke motor is more maneuverable and easier to repair. Vibration level is lower with a four-stroke unit.

Their it follows, the repair of the lawnmower consists of troubleshooting;

  • the engine does not start;
  • the cutting mechanism does not pick up speed;
  • the engine stalls;
  • The gearbox is getting warm;
  • Rapid boom vibration or knocking noise is noticed.

Before eliminating the malfunction, it is necessary to carry out diagnostics, determine the non-working node.

It is important to know the lubrication points of the tool. Continuous care and cleaning of the machine after work will prolong its operating life. Tighten the mounting screws, prepare the fuel and fill the tank before starting work.

How to Ring the Ignition Coil on a Trimmer ~ WRCBUX.RU

Diagnosing and determining the circumstances of the malfunction of the ignition coil of the car

Starting a petrol-powered machine is impossible without the ignition of the fuel-air consistency. How to check the ignition coil on a trimmer yourself, STIHL coil mechanism. That’s what the ignition system is all about, with the ignition coil as its ignition coil. Sometimes it is impossible for a beginner to check its condition. Use our tips for that.

How an ignition coil works

The ignition coil is the simplest transformer, which converts the low voltage current. 12 volts, to a high voltage current. 35000 volts, which is necessary for the gasoline internal combustion engine to ignite the combustible mixture. From the battery, a low current flows to the primary winding, inside which there is a secondary winding. Through the difference in the number of coils and the thickness of the copper wire, a high voltage current is generated which flows via a high-voltage wire to the ignition distributor and from there to the spark plugs, where it ignites the combustion mixture according to the sequence in which the cylinders work.

Differences in types

There is no particular difference between domestic and imported ignition coils. There is a difference in the types of devices. How to rewind the cutting cord on a spool how to change the line for a trimmer in a Champion trimmer. Two-spark and single-spark coils are the main ones. How to check the ignition coil. Individual ignition coils are installed above the spark plug and require an additional sensor on the camshaft that detects the location of the top dead center. Two-disc coils were previously used for two-cylinder engines and allowed you to do away with the ignition distributor. On modern models, either two coils are installed or multiple coils are combined in one housing. Before you tackle the ignition coil, it’s worth checking the 360-degree coil as well. Only suitable for engines with an even number of cylinders. Signs of coil faults are exactly the same.

Causes of failure of the mechanism

There are no specific causes of ignition coil failure. It should last at least 60-80 thousand kilometers. This reel could last much longer than the manufacturer claims, or much shorter. How to check the ignition coil on the trimmer yourself. Of great importance is the duration of the process of starting the car and the conditions of its use. The coil does not like prolonged loading, so it is undesirable to turn on the ignition without starting the engine. It could fail if overheated, or if water gets inside or on the case.

What is the difficulty in checking the performance

Without diagnosis it is very difficult to determine with absolute certainty that the ignition coil is the cause of the malfunction. The symptoms of failure of the entire ignition system are the same. To be sure of the malfunction of a particular part, it is necessary to diagnose the entire system. To test but not as in the trimmer starter and coil spool. Signs of ignition coil failure are absolutely identical to the signs of ignition distributor failure. It is possible to find out the cause of the problem only after searching for the spark plug.

Main signs and symptoms of failure

The main signs by which you can assume that the problem is in the ignition system, and specifically in the coil:

  • the engine does not start, though the battery is charged, the starter operates;
  • Unstable engine operation, “trots”. How to test the coil ignition coil no spark on the trimmer, how to solve the problem? This is reflected especially clearly on the tachometer;
  • When you suddenly press the accelerator pedal, the engine begins to stutter, you feel a significant dip in operation;
  • if the air is wet or it is raining, the engine becomes more irregular and the “Trojit” is much stronger;
  • during cold weather, up to the moment of warming up the engine, there is a slack in engine operation, unstable operation, after warming up the symptoms do not disappear, but they become less noticeable;
  • During unstable engine operation on the dashboard check engine light illuminates, which when diagnosed will indicate problems in the work of the ignition coil;
  • After acceleration and when shifting upshift, you can feel the lag;
  • during driving, when pressing an accelerator pedal, you can feel a perceptible jerking;
  • while driving you have a feeling that somebody is holding the car from behind, and is not letting the car accelerate and reach the necessary speed.
check, ignition, coil, trimmer


Resistance of a good coil should be.primary winding.0.8 ohms resistance of the secondary winding.

Replacing the ignition coil on the brushcutter Dnipro-M BT-430

Replacement of ignition coil of brushcutter Dnipro-M BT-430 is shown, new one was bought here.

Determine the cause of the fault visually

Regardless of the ignition coil installed on the vehicle, any diagnosis should begin with a visual inspection.

  • Check the coil body and contacts. How to check the ignition coil on how to check the ignition coil in a trimmer. Make sure that the case is in good condition, there are no cracks, chips, black spots and places of partial burnout. It is necessary to wipe the housing, make sure there are no traces of oil leaks or traces of leakage of the housing. If any of the above mentioned defects are found, further diagnostics is not required. The ignition coil is not repairable. It is only replaceable.
  • After that, the state of the contacts should be checked. How to check the ignition coil Replace the ignition coil on a brushcutter coil on. Oxidized leads should be cleaned and returned to normal operating condition. Bad contact affects the correct operation of the engine and leads to failure of the ignition coil.

If the malfunction could be established visually, there is no point in looking for the cause inside the mechanism, change the coil without hesitation

Diagnosing cars that don’t have electronics

If visual inspection reveals no defects, one of the windings of the ignition coil may be shorted. How to Check a Spark Coil How to Replace a Spark Coil on a Chainsaw. Need to check winding continuity.

Spark plugs

From the appearance of the spark, its color is influenced by the spark plug itself, its condition.

Regular spark plug. Color of deposits on insulator (center electrode skirt) is light brown or coffee color; carbon and deposits are small. Complete absence of traces of oil. Moderate electrode burnout. The owner of this motor can only be envied, and this has. It’s fuel-efficient and there’s no need to refill oil from change to change.
Center electrode has a velvety, dark carbon residue. Dry soot. A common example of a spark plug from a motor with an inflated fuel consumption. Rich fuel-air mixture. Nozzle failure. Engine control system malfunction (for example, failure or incorrect readings of the oxygen sensor), malfunction of the air damper actuator mechanism, clogging of the air filter.
The color of the electrode is gray to off-white. Example of a very poor fuel-air consistency.
The skirt of the center electrode of the spark plug has a corresponding red tint, this color can be compared with the color of a reddish brick. This redness is caused by running the engine on fuel that contains excessive amounts of metal-containing additives. Long use of such fuel will lead to the fact that iron deposits form on the surface of the insulation conductive coating, through which the current will pass easier than between the electrodes of the spark plug, and the plug stops. Works. Such a fleck on the spark plug is more typical when using manganese additives in gasoline, which are used to increase the octane number of fuel.
Heavy traces of oil. Dark oily soot, especially in threads. Usually it indicates wrong temperature in the direction of insufficient spark plug temperature or other. Traces of oil in cylinder. Probable defects: wrong choice of spark plug (very “cold” spark plug), wear of valve guides, valve stem seals, piston rings. Increased oil consumption. In the first minutes of the engine work, at the moment of warming up, the corresponding blue-white emission.
The center electrode and its skirt are covered with a thick layer of oil with an admixture of drops of unburned fuel and small particles from the destruction that has occurred in this cylinder. The reason is. Rupture of 1 of the valves or breakage of the walls between the piston rings with penetration of iron particles between the valve and its seat. With all this the engine “trots” does not stop, you can see a significant loss of power, the fuel consumption increases by one and a half, twice. There is only one way out. Repair.
Total destruction of the center electrode with its clay skirt. A precondition for such destruction could be one of the following reasons: long-term work of the engine with detonation, the introduction of fuel with a low octane number, very early ignition, etc. Д. Just a faulty spark plug. The engine symptoms are the same as in the previous case. The only thing you can count on is that the particles of the center electrode managed to slip into the exhaust system without getting stuck under the exhaust valve, otherwise the repair of the cylinder head cannot be avoided.
Destruction of the clay insulator. Preconditions for appearance: a sudden change in temperature, for example, when cooling the unscrewed from a hot engine plug in cool water. In some cases the destruction could be caused by a fault in the spark plug itself (faulty or counterfeit) or by mechanical damage, such as a fall.
Electrode spark plugs overgrown ash, the color does not play a decisive role, it only shows the operation of the fuel system. The cause of this growth. Oil combustion due to the formation or occurrence of piston rings. The motor has excessive oil consumption, there is a strong blue smoke when the gas comes out of the exhaust, the smell of the exhaust is similar to a motorcycle.
Spraying the spark plug with gasoline. Not uncommon due to a faulty injector. In winter, this can happen because the gasoline that enters the combustion chamber does not have time to escape and settles on the spark plugs and cylinder walls.

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Chainsaw Gap Between Coil And Flywheel

The gap between the coil and the flywheel

Spare parts for chain saws not trimmers with delivery by Russian mail in almost all regions cash on delivery. SDEC, PEC, Business Line on prepayment

  • Parts for chain saws
  • Cylinder-piston chainsaw groups
  • Chain saw carburetors
  • Starters for chain saws
  • Ignition coils chain saws
  • Chain brake covers chain saws
  • Chain tensioners
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  • Cap(s) for chain saws
  • Chain saws silencers
  • Trimmer parts
  • Trimmer cylinder and piston groups
  • Carburetors for trimmers (chain saws)
  • Starters for trimmers (chain saws)
  • Coils ignition trimmer (бензокоскос)
  • Trimmer clutch (chain saws)
  • Flywheels trimmers (benzokosa)
  • Trimmer (chain saw) gearboxes
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Selecting by Model

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Ignition coil (magneto). Function check and gap adjustment.

It is not uncommon to encounter situations where tool users come with faulty ignition. Often they are faulty, but often the ignition coil has nothing to do with the failure of the instrument. The following is a description of how to check the condition of the ignition coil.

Initial ignition system checks.

In advance without performing a high-quality installation of how to test the ignition module check the correctness of the following parts of the circuit:

  • plugs not switch
  • the condition of the cap: it should be firmly attached to the plug, the high-voltage wire is aggressively fixed not fly out of the cap does not coil, the material of the cap does not contain cracks
  • the high-voltage wire is intact along its entire length, the contacts of the wires are tight and there are no signs of corrosion
  • visually inspect coil body for cracks and imperfections
  • remove contamination of current-conducting parts
  • change petrol station if possible: you will like bad petrol

The meaning of these actions is the fact that to exclude from the list of likely defects that remains to do our client elements of the chain, not counting the coil. If our client is fine, we move on.

Why do you need a good spark? A little bit of physics of the process.

Quality of spark determines its ability to ignite correctly formed air-fuel mixture in the working criteria. The initial ignition of the consistency is accomplished in the spark or otherwise known as the ignition cord from the pulse of electronic current generated by the ignition coil. here is actually the instantaneous heating up of gasoline molecules not oxygen, what causes them to start a chemical reaction of combustion. Then the similar oil spreads completely on the volume of consistence with the usual speed of 30-40m/s, forming a burning front of a certain shape. The way a spark exists is not ignited within 1-2ms.

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