How to set the ignition on a trimmer

Sterwins gasoline grass trimmer. Installing chain saw ignition coil

Hi all. I do not know where to write, so I will write on the blog. Since this does not apply to the e34. To write exactly need!Prehistory: In general, somewhere about a year ago was bought a trimmer for grass sterwins in Peter in Leroy Merlin. For about 8 thousand.

The grass trimmer is well made, handy belt for the suspension, not rawhide bolts, 43 cc, collapsible well that is folded rod in half and a handle unscrewed, and basically comfortable and powerful as for me better champions exactly and even better than the Stihl like fs55 and the like. Just easier to use, I have experience, believe me.So at the end of last season mowing, he stupidly stalled. The ignition coil is dead. And here begins the most interesting.

I found out that, well, first of all, I’m not the only one. Secondly, the coil is such a coil can not buy anywhere! Nowhere is this even in China. This brand is stupid made to order a batch made specifically for Leroy. And the most interesting thing is that in the service of Leroy no reels in stock, and as I understand it will never be the word entirely!))? It’s cool?It would be possible to stand up and surrender the warranty but that’s just I do not live in St. Petersburg and go for the sake of it in St. Petersburg to me it is easier to buy a new trimmer for grass. That’s how it is.

What I tried:I was looking for a coil exactly the same where I could, the result is 0. I tried similar coils, the result is that some have the spark but do not start, then there is no spark.So I gave up on it until this summer.

Solution: came to mind unexpectedly)) I thought about what if there is a spark but does not start it just not at the right time that is not vmt. The motor is a two-stroke motor, all it needs is a spark at temp and that’s it.By the way these coils on saws, trimmers tricky. Inside are filled with “brains” and they each have their own, that is, give a spark at a different moment.In general, I took a stroboscope and screwed the coil with a spark tiki was from a partner and drew a marker to vmt realized that the regular coil gives a spark with almost 180 degrees of delay oh_0.I took off the magneto but it is on a key, but at the same time on the cone) well, I thought I would try to start at least so on the knee.Turned magneto 180, a couple of times adjusted the strobe light and grass trimmer came to life! Works as before.

And then I thought that the fit under the cone is very tight and tightened more magnet assembled grass trimmer back))) mowed a decent amount of already all right.So hopefully I will help someone, but in any case only someone who “knows” so to speak can do it.All the world!))

How to check the ignition coil chain saw?

There are several effective ways to check the factory ignition coil. The first of these is a visual one. To do this, the operator must carefully remove the magneto from the structure of the saw, first disconnecting all the contacts connected to it. After that, the part must be inspected.

Most often its faults are:

  • Damage to the insulation, initially caused by gradual or sudden overheating, excessive vibration and voltage peaks in the electrical network created. All this leads to a short circuit in the factory windings of the coil;
  • Disruption of the integrity of standard high-voltage wires. this results in overloading and breakage of electrical wires.

In either of these cases, the electronic ignition of the gasoline chainsaw will need to be replaced immediately.

The second way to test the coil is to use a multimeter.

  • Connect the device to the positive and parallel negative factory contacts, having previously set it to the mode of constant measurement of the resistance formed;
  • After testing the built-in coil, you need to look at the device. In domestic chainsaws of different manufacturers, resistance values may differ from each other. As a rule, the average reading is about 0.4-2 ohms. If the multimeter you are using shows zero resistance, it means that an accidental short circuit has occurred in its normal winding. In a few cases, the device may show infinity. then the operator will need to find a break in the circuit.

ECHO Trimmer Spark Advance Test Easy Step by Step

In each of these cases, the repair of the factory ignition coil is performed only by replacing the part completely.

Each method allows you to get information about the serviceability and stability of the factory ignition system of the gasoline-powered saw. In some models of garden gasoline tools, manufacturers provide for the possibility of replacing only the faulty coil. In other cases, chainsaw owners must replace the entire ignition system.

From time to time, a single-axle tractor needs to adjust the ignition system. Untimely adjustment of this node will lead to accelerated wear of other, no less important mechanisms of the agricultural machine. In order to be able to independently adjust the ignition system on a diesel motoblock and its gasoline counterpart, it is necessary to study the schemes of construction of this node.

A properly tuned ignition system of a power tiller is able to create a spark in the right place and at the right time. In this case, the magneto cap is responsible for distributing the generated spark, and the lower part of the magneto cap is responsible for interrupting the spark. In order for the ignition system to work this way, it must be adjusted.

The following is the procedure for installing the ignition:

  • The first thing to do is to check the operation of the flywheel in the engine until the contacts inside the magneto open;
  • It is then necessary to measure the distance between the “anvil” and the “hammer” built into the ignition system;
  • Next, it will be necessary to turn the flywheel until the piston is compressed;
  • Once the flywheel has reached its highest point, it must be turned again. As a result, a one-time knock will be heard, indicating the operation of the overrunning clutch present in the design;
  • The flywheel must then be turned counterclockwise so that the second marking on it aligns with the marking located on the housing;
  • The next step is to adjust the distance between the breaker contact and the cam next to it. The minimum for proper operation of the ignition system will be a gap between the parts of 0.25 mm, and the maximum. 0.35 mm;
  • At the end it remains to fix the built-in cam with a special screw, which is located at the top. On how to properly adjust the ignition system on a power tiller will tell you about the video.

Performed adjustment of the ignition will accelerate the start of the engine of the motoblock and make it smoother, which will lead to a slower wear of the piston group and other important elements of the engine of the agricultural machine.

The gap between the ignition coil and the flywheel of a chainsaw

ICE engines are installed not only on cars or motorcycles. They are also widely used in various tools, such as a chainsaw or grass trimmer. In the case of their malfunction, poor starting, it is often enough to set the correct gap between the flywheel and the ignition coil.

Trimmer gap between coil and flywheel

Both two-stroke internal combustion engines (ICE) and four-stroke engines are used on gas trimmers. But the ignition system in them is no different, so repairs and adjustments to this fuel ignition system will be the same for different types of internal combustion engines.

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How the trimming system works

The ignition system of a two-stroke combustion engine consists of 2 elements: the flywheel and the coil (magneto). The image below shows what these look like.

There is an impeller on the flywheel that acts as a fan to cool the engine. Also on one side of the flywheel are permanent magnets, shown with an arrow in the figure.

When the flywheel rotates, an electric current is generated in the coil, which serves to create a spark on the spark plug. The spark appears when the magnets are directly under the magnet.

Why do I need ignition timing control?

In some cases where the engine won’t start, an ignition check will be required. Of course you must first check the condition of the spark plug and the high voltage cable with the cap.

Ignition control on a two-stroke engine is necessary to ensure timely ignition of the fuel in the engine combustion chamber. Below is a schematic diagram from which you can understand how an internal combustion engine works.

The spark in the spark plug should appear when the fuel is compressed by the piston when it reaches the top dead center (TDC) slightly. When the piston passes the TDC, the fuel mixture is ignited, causing the piston to fall due to the energy of the explosion.

Consequently, if for any reason (mainly due to a shift of the flywheel on the shaft relative to its original position) fuel is ignited before the piston has passed TDC, it is rejected and the crankshaft rotates in the opposite direction. This movement can damage the starter assembly, cut the starter cord, etc. Д. In this case it is the early ignition of the fuel.

It can also be late ignition on a trimmer: the piston goes out after compression of the fuel, which has not ignited, and at that moment a spark appears. In this case, the engine will either not start or will lose power significantly and will not pick up speed.

But such problems with early or late ignition on two-stroke internal combustion engines are quite rare, because the flywheel with magnets is already set in the correct position, which is perfectly synchronized with the movement of the piston. In addition, the flywheel is attached to the shaft with a dowel and nut. Therefore, improper installation of the part is excluded.

Essentially, ignition control is about establishing the correct gap between the magnet and the flywheel.

How to check the health of the magnet

The magnet is the main part of the ignition system of the engine and is the coil with the primary and secondary windings arranged around the core Often a faulty magnet on the spark plug makes the spark disappear and the fuel not ignite. To check the coil, you need to use a tester and do the following.

  • On the tester, switching to the resistance measurement mode, you must set 200 ohms. This will check the primary winding.
  • Connect one tester electrode to the “ground” of the coil and the other. to the contact going out of the magneto. Usually the resistance should be between 0.4 and 2 ohms.
  • To check the secondary winding, you need to set the device switch to 20 pc. Next, one probe of the device is inserted into the cap of the spark plug, and the other probe is connected to “ground”. Usually the resistance should be in the range of 4-6 pieces or higher (depending on the model).

When the circuit is open, the device will show infinity, and when closed. 0 (zero).

If you do not have a tester, then you can use the following method with great care so that the electrode does not touch the cylinder, otherwise the coil will burn out.

Why I need a good spark.

The quality of the spark determines its ability to ignite a properly formed air-fuel mixture under operating conditions. A weak spark under conditions of high pressure and temperature in the combustion chamber cannot do so. Ignition occurs later or not at all. There is irregularity in the engine, the engine does not pick up speed, there is vibration, detonation, the starter may have a “kick back” effect.

The insidious thing about such a breakdown is that the following diagnosis does not give one hundred percent confidence in the effectiveness of the ignition coil. Such an implicit breakdown, when there is a spark, but it is not quite right, is often misleading and causes problems with the ignition coil to be written off as a carburetor malfunction.

Typical actions in such cases are to increase the fuel supply. It turns out that a spark can ignite such a spark, but the right spark doesn’t have it. But using an enriched mixture leads to rapid wear of the cylinder-piston group and the muffler. Therefore, in such controversial situations, once again check both the carburetor and the ignition coil.

The insidious thing about 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 it is not quite right, is often misleading and causes you to write off ignition coil problems to a carburetor malfunction.

Typical actions in such cases. it’s. It turns out that the spark can ignite such a spark, but the right one does not have it. But the use of enriched mixture leads to rapid wear of the cylinder piston group and muffler. Therefore, in such controversial situations, once again check both the carburetor and the ignition coil.

How to set the ignition on the trimmer with your own hands

Before we get acquainted with how to set the ignition on the trimmer. we will tell you about the nuances associated with its functioning. It is important for each user to understand that the hands to fix a small or global breakdown with the start of the trimmer for grass. almost always realistic. The main thing to know: what and from what broke or just does not work because of the lack of competently set parameters between different parts of the whole mechanism of the grass trimmer. You can determine this by yourself, when the grass trimmer simply does not start, and does not even produce a “sneezing”. This is true for both Shtil and Husqvarna brushcutters, as well as for domestic units.

Many models of trimmers assume setting the ignition advance angle, but a sufficient number of copies are made in such a way that it is not necessary to do this. It is worth distinguishing the moment of ignition, when the spark ignites the fuel and advance. the moment of fuel ignition before the piston reaches the top, the so-called “dead center. There is a certain period of time, from that part of it, when the spark appears (we have already written about the spark plug) to the moment when the fuel ignites, and the gas pressure reaches maximum value and the work is given a “start”.

So, on a trimmer you can adjust the ignition range on your own. To do this, you need to adjust the necessary distance between the flywheel and the ignition coil itself.

It is optimal to do it according to a special template, but there are other, “homemade” variants, if you do not have such possibility at the moment of adjustment. Read about this in the next section of the article. About flywheel, coil, and how to buy quality parts for trimmers. at the online store of spare parts KosiKosa!

How to adjust ignition on Husqvarna Trimmer video

Gasoline trimmers use both two-stroke internal combustion engines (ICE), and four-stroke. Alas their ignition system does not differ from each other, because the repair and adjustment of the complex combustion will be similar for different types of internal combustion engines.

The ignition system two-stroke ICE consists of 2 parts: flywheel and coil (magneto). The illustration below shows how they look like.

On the flywheel is the impeller, which acts as a fan to cool the motor. Also on one side of the flywheel are permanent magnets, shown with an arrow in the figure.

The rotation of the flywheel in the coil generates an electronic current, which serves to produce a spark on the spark plug. The spark occurs just when the magnets are specifically underneath the magneto.

Other times, when the engine does not start, it will be necessary to adjust the ignition. Of course, at first it is necessary to check the serviceability of the spark plug and the high-voltage cable with the cap.

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It is necessary to regulate the ignition on a two-stroke engine to ensure that the fuel is ignited in time in the engine combustion chamber. Below is a diagram, from which you can certainly understand the mechanism of the internal combustion engine.

The spark in the spark plug should appear at the moment of compression of the fuel by the piston, when it does not reach the top dead center (TDC). When the piston passes the TDC, the fuel consistency is ignited and the piston goes down under the influence of the explosive energy.

If for any reason (for the most part this is due to the flywheel on the shaft shifting relative to its initial position), fuel ignition occurs 30 years before the piston passes TDC, it is reversed and the crankshaft is cranked in the opposite direction. This movement can destroy the starter assembly, cut the starter cord, etc.д. In our case the fuel ignition is premature.

Picking up the correct gap on the ignition coil of the lawnmower Union

You will also like later ignition on the trimmer: the piston after compression of the fuel, which has not ignited, goes down, and under these circumstances there is a spark. Under such circumstances, the engine or will not start, or significantly lose power and will poorly gain speed.

But such a problem with raneshnom as it is still called late ignition on two-stroke ICE are quite rare, because the flywheel with magnets set already in the correct position, which is perfectly synchronized with the movement of the piston. Also, the flywheel is fixed to the shaft by means of a key and a nut. That’s why the incorrect installation of the part is impossible.

Mainly, the adjustment of ignition is to align the correct gap between the magneto and the flywheel.

Magneto is the main part in the ignition system of the motor and it is a coil with primary and secondary windings located around the core. Often, due to a faulty magneto, the spark is lost on the spark plug, and the fuel does not ignite. To check the coil, will need to use a tester, and perform the following acts.

  • Set the resistance measurement mode on the tester to 200 ohms. This is the method by which the primary winding will be checked.
  • Connect one electrode of the tester to the “wiring” to the coil and the 2nd electrode to the contact that comes out of the magneto. Normally, the resistance is between 0.4 and 3.5 Ohm.
  • To check the secondary winding it will be necessary to set the switch of the device to 20 com. Next, one probe of the device is inserted into the cap of the spark plug and the 2nd probe is connected to “mass”. Normally, the resistance characteristics should be in the range of 4-6 kohms and above (depending on the model).

The device will display infinity at an open circuit, and 0 (zero) at a short circuit.

If you do not have a tester, use the following method, being very careful not to let the electrode touch the cylinder, otherwise the coil will burn out.

  • Remove the cap from the spark plug. No need to unscrew the spark plug to keep the compression.
  • It is necessary to insert a nail without a head into the cap. The nail should be of such cross-section, that it is perfectly held in the cap.
  • Tie the cap with a nail to the cylinder using dielectric so that the gap between the electrode and the cylinder body is 5.5 to 7 mm (but does not touch the “mass”).
  • Use the starter to make a couple of times to simulate the start of the engine. The ignition button should preferably be on.
  • See if there is a spark and what color it is.

Normally, the spark is solid white or has a bluish color. If the spark is weak and its color is orange or yellowish, it indicates a defective magneto.

Also consider the fact that from time to time a magneto in a cool state can give a good spark. Alas, after heating due to internal defects it ceases to create current. As the coil cools down, the weed trimmer starts up again and runs for a while until the magneto heats up again. Such coil must be replaced.

Sometimes a similar problem with the heating can cause a spark plug, if the coil is serviceable, so you need to inspect both parts.

Ryobi String Trimmer Ignition Coil Replacement 291337001

The ignition on the trimmer is adjusted quite easily.

    Remove the cover with a motor, unscrewing that remains to do our customer retaining it bolts. For example, on chain saw Patriot (Patriot) PT 2540, to remove the cover, you will need to unscrew the housing air filter, and a flat screwdriver remove it from the latches. Then the plastic housing is simply removed.

How to properly start a lawn mower?

Regardless of the type of this action, there is a strict order that must be followed, that is:

Inspection and Checking

Any malfunction of the grass trimmer can be a serious hazard.

Badly tightened bolts that fix the clutch bell to the engine can lead to rapid fraying of the clutch shoes, and any leakage of the fuel system often leads to ignition and burns or fire.

Loose gearbox bolts may cause the drive shaft rod to pop out and the grass trimmer to stop working. Loose screws on the fixing levers may cause unintentional lowering of the shaft and damage to the cutting attachment.

Before every startup, you should at least briefly inspect the machine for leaks. This is especially true for any first startup, whether it’s after purchase or after storage. During operational starts it is acceptable to inspect only the fuel system for leaks.

ignition, trimmer

One of the most important steps in checking before any first start is to determine the amount of lubricant in the gears and drive shaft, which will require disassembling the trimmer for grass and remove both gears from the shaft.

In this way, you will assess the amount and condition of the lubricant not only on the fill hole side, but also in the area where the shaft rod contacts the gear pinion.

In the same way every 2-3 weeks check quantity and condition of oil in a crankcase of four-stroke motors, if the device will work long time with low oil level, there is a great probability of jamming of crankshaft.

Filling the tank with fuel

This operation has to be done after purchase and winter storage, as well as during a work stoppage caused by gasoline depletion. Four-stroke engines are filled with pure gasoline AI-92, and two-stroke engines with a mix of fuel and special oil we told you about here.

Remember, if you fill up the two-stroke trimmer for grass after winter storage, be sure to drain the old fuel from it, because it has already lost its lubricity, so the crankshaft bearing and cylinder piston group will work without lubrication.

Starting the gasoline trimmer

Regardless of the type of starting, there are 6 actions that you always have to do:

  • pumping of fuel;
  • setting the air damper to the “start” position (“closed”, “off”);
  • setting the switch to the “on” position (“on”, “on”);
  • pressing and fixing the throttle key;
  • jerking the starter rope with the starter selecting a freewheel;
  • Put the air damper in the “work” position (“open,” “on”).

The first 3 items on this list can be done in any sequence, but you can only pull the air starter cord after them. Neglecting to pump the fuel will lead to the fact that pull the rope manual starter will have to dozens of times to moving the engine piston pumped enough air to suck fuel from the carburetor.

Neglecting the air damper will result in a very rich mixture, which is good for a running engine and extremely bad for starting, because such a mixture ignites well only inside a warmed up cylinder.

After moving the choke shutter to the closed position, the incoming air is not sufficient to idle the engine, so press and fix the gas pedal key (gas pedal, engine speed regulator). The on/off button on your engine blocks the ignition system, so turn it on before you start.

If you don’t move the switch to the right position, the voltage won’t come to the spark plug, which means there’s no spark to ignite the mixture in the cylinder.

After the engine starts, move the air damper to the open position, because greatly over-enriched mixture is good for starting, because ignited even in a cold cylinder, but due to lack of air, the fuel does not burn completely.

An attempt to mow grass with a closed air damper will lead to a sharp drop in power of the engine and strong heating of the valves, so long work (dozens of hours) leads to burnt-out valves or damage to the cylinder head gasket.

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How to start the gasoline grass trimmer

The process of putting your lawnmower into operation, whether you bought it now or took it out after winter storage, the rules listed below will allow you to avoid major mistakes that can damage the tool.

Let’s assume that you have just bought a gasoline grass trimmer. Take the instruction manual out of the box and check that you have all the mower parts that are listed. After that you can proceed to the assembly.

Preparation of the fuel mixture and refueling

For the convenience of preparing the fuel mixture, it is better to have a special canister. where one part contains gasoline and the other part contains 2-stroke oil. We recommend to have such a measure, it is very convenient in use https://ru-sad.ru/prinadlezhnosti-dlya-sadovoy-tehniki/dlya-benzopil/kanistryi/

Next, take a measuring cup with a scale on it, with its help you can prepare a mixture as quickly and accurately as possible. Look in the manual to see what brand of gasoline and 2-stroke oil https://ru-sad.If you have a lawn mower and it needs extra oil, check your mower manual and make sure you have all the recommended brands of gasoline and 2-stroke oil. to add petrol and oil to the fuel mixture container according to the proportions given in the manual. Then pour the ready mixture carefully, through a funnel, into the fuel tank of the grass trimmer. The gasoline to oil ratio must be exactly as described in the manual. This is a very important step!

Start the lawnmower with the engine running cold

To start the lawn mower for the first time, locate the air damper lever and put it in the “closed” position. Switch on the ignition on the handle. If your model has a manual fuel pump, popularly called a choke, press it 3 to 5 times until you see fuel mixture inside the primer. Now the machine is ready to start. Place the grass trimmer on a flat surface to ensure a stable position. Smoothly pull the starter cord until you feel resistance, then pull the cord sharply toward you 3-5 times.

If the engine starts after 5 pulls, open the choke. If not, still open the air flap (with the flap open and continue to try to start the engine, the fuel will flood the plug and will have to dry it, and this is an unnecessary waste of time).

ignition, trimmer

If the engine won’t start, with the choke open, then close it keep pulling the cord. The first start can be difficult and may require up to 15 pulls. Once the engine is running, push the throttle lever once, so you engage the idle speed. Now let the engine run and warm up. After that it can be stopped by pressing the stop button.

Start the warmed up engine

This is very easy. Move the switch to the operating position and pull the cord until the start. If you do everything according to the instructions, you shouldn’t have a problem starting a working mower.

The main mistakes when starting

Let’s list the main mistakes that beginners make when starting a gasoline grass trimmer:

Setting the cord

There are several types of cord charging.

How to set ignition coil gap on your gas trimmer or blower!

  • The fast-charging variant. Such spools are considered the most modern, they are not disassembled. In order to wind the fishing line, it is enough to slip it into the hole of the head, combine the 2 ends and screw it onto the reel. This mechanism is used in heads with automatic type, sometimes in semi-automatic. Master does not need to understand the rules of winding the fishing line and spend time on filling it up.
  • collapsible variant. This option is used on semi-automatic, as well as manual heads. In order to wind the fishing line on the spool, it is necessary to shut off the machine. Then it is worth disassembling the head cover, pull out the spool. After that, the cord should be wound on it and put in place.

As practice shows, the most popular variant is the collapsible. Influenced by the price, it is affordable to most people. The coils in them are as follows.

  • Single-section, in which the line is wound through a single groove.
  • Two-section reel, in which the line is placed in 2 grooves. It is a convenient and easy option for laying the line.

Ignition setting on a scooter Muravy

The electric circuit of the scooter Muravy is quite simple and does not contain heavy nodes. It is used for three main tasks:

  • Ignition of the fuel-air mixture in the cylinder. Due to this action, there is a movement of the piston, which transmits torque to the flywheel.
  • Cold and warm engine start.
  • Power to the lights and indicators (turn signals, parking lights, brake lights).

The electrical equipment of the Ant is a system with one wire, and the second is the body of the moped itself. All of the equipment has excellent insulation, eliminating the possibility of shorting and harming the driver.

How to check the serviceability of a magneto

The magneto is the main part in the engine ignition system and is the coil with the primary and secondary windings arranged around the core. It is often the fault of the magneto that causes the spark plug to lose its spark plugs and the propellant cannot be ignited. To check the coil, you will need to use a tester, and perform the following steps.

  • On the tester, going into resistance measurement mode, you need to set it to 200 ohms. This will test the primary winding.
  • Connect one electrode of the tester to the coil’s “ground” and the other to the contact that comes out of the magneto. Normally, resistance should be 0.4 to 2 ohms.
  • To check the secondary winding, set the switch on the device to 20 com. Then, insert one probe of the device into the cap of the plug and connect the second probe to the “ground”. Normally, the resistance readings should be in the range of 4-6 com and higher (depends on the model).

If the circuit is open the instrument will show infinity and if the circuit is shorted it will show 0 (zero).

If you do not have a tester, you can use the following method, being very careful not to let the electrode touch the cylinder, otherwise the coil will burn out.

  • Remove the cap from the spark plug. It is not necessary to unscrew the spark plug to keep the compression.
  • A nail without a cap should be placed in the cap. The nail should be of such a diameter that it will hold well in the cap.
  • Tie a cap with a nail to the cylinder using dielectric so that the clearance between the electrode and the cylinder body is within 5.5 to 7 mm (but in no case touching the “mass”).
  • Repeatedly test the engine with the starter. The ignition button must be on.
  • Watch to see if a spark appears and what color it is.

Normally, the spark should be strong, white or have a bluish tint. If the spark is weak and its color is orange or yellow, it indicates a defective magneto.

Also consider the fact that sometimes a magneto can give a good spark when it is cold. But after warming up, because of internal faults, it no longer produces any current. As soon as the coil cools down, the grass trimmer starts up again and runs for a while until the magneto warms up again. Replace such a coil.

Sometimes a similar heating problem can be caused by the spark plug, even if the coil is serviceable, so you need to check both parts.

What is an ignition coil?

For ignition to occur, a spark is needed to ignite the fuel-air mixture in the engine. This is the function of the ignition coil. It is an electrical transformer that converts the low battery voltage. usually only 12 volts. into a very high voltage to get a spark to ignite the fuel in the spark plug gap. The result is a motor that starts. Some systems require only one coil, but most newer vehicles have a separate ignition coil for each cylinder.

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