Trim Ignition Setting
Trimmer ignition setting
On gas trimmers, both two-stroke internal combustion engines (ICE) and four-stroke are used. But the ignition system in them is no different from each other, so the repair and adjustment of this fuel ignition system will be the same for different types of ICE.
How the trim system works
The ignition system of a two-stroke ICE consists of 2 elements: a flywheel and a coil (magneto). The image below shows how they look.
An impeller is located on the flywheel, which acts as a fan to cool the engine. Also on one side of the flywheel are permanent magnets, shown in the figure by an arrow.
When the flywheel rotates, an electric current is generated in the coil, which serves to produce a spark on the spark plug. A spark appears when the magnets are directly below the magneto.
Why do I need to adjust the ignition
In some cases, when the engine does not start, ignition adjustment will be required. Of course, first you need to check the serviceability of the candle and high-voltage cable with a cap.
Ignition control on a two-stroke engine is necessary in order to ensure timely ignition of fuel in the engine combustion chamber. Below is a diagram from which you can understand the principle of the internal combustion engine.
A spark in the candle should appear at the moment of compression of the fuel by the piston, when it does not reach the top dead center (TDC) just a little. When the piston passes TDC, the fuel mixture ignites, as a result of which the piston goes down under the action of the explosion energy.
Therefore, if for some reason (mainly due to the displacement of the flywheel on the shaft relative to its initial position), the fuel ignites before the piston passes TDC, then it goes back and the crankshaft scrolls in the opposite direction. This movement can damage the starter assembly, cut off the starter cord, etc. In this case occurs early fuel ignition.
May also be late ignition on the trimmer: the piston after compression of the fuel, which did not ignite, goes down, and at this moment a spark appears. In this case, the engine will either not start, or it will significantly lose power and will not gain momentum well.
But such problems with early or late ignition on two-stroke ICEs are quite rare, since the flywheel with magnets is already installed in the correct position, which is perfectly synchronized with the movement of the piston. In addition, the flywheel is fixed to the shaft with a dowel and nut. Therefore, incorrect installation of the part is excluded.
Basically, the ignition adjustment is to set the correct clearance between the magneto and the flywheel.
How to check the health of magneto
Magneto is the main part in the engine ignition system and is a coil with primary and secondary windings located around the core. Often, due to a magneto malfunction, a spark disappears on the spark plug, and ignition of the fuel does not occur. 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 200 Ohms. In this way, the primary winding will be checked.
- Connect one tester electrode to the “mass” of the coil, and the second to the contact coming out of the magneto. Normally, the resistance should be between 0.4 and 2 ohms.
- To check the secondary winding, you will need to set the switch of the device to 20 com. Further, one probe of the device is inserted into the cap of the candle, and the second is connected to the “mass”. Normally, resistance indicators should be in the range from 4-6 kom and above (depending on the model).
When the circuit breaks, the device will show infinity, and when closed. 0 (zero).
If you don’t 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.
- Remove the cap from the candle. You do not need to twist the candle to maintain compression.
- Insert a nail without a cap into the cap. The nail should be of such a diameter that it holds well in the cap.
- Tie the cap with the nail to the cylinder using a dielectric, so that the gap between the electrode and the cylinder body is between 5.5 and 7 mm (but in no case touches the “mass”).
- Using a starter, simulate the engine starting several times. The ignition button must be on.
- Observe whether the spark appears and what color it has.
Normally, the spark should be strong, white or have a bluish tint. If the spark is weak, and its color is orange or yellow. This indicates a faulty magneto.
It should also be borne in mind that sometimes a cold magneto can produce a good spark. But after heating due to internal malfunctions, it ceases to produce current. As soon as the coil cools down, the trimmer starts again and works for a while until the magneto is again heated. Such a coil must be replaced.
Sometimes a spark plug can cause a similar heating problem, even if the coil is working, so both parts must be checked.
Ignition Algorithm
Ignition on the trimmer is fairly easy to adjust.
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Remove the casing from the engine by unscrewing all the bolts holding it. For example, on the Patriot (Patriot) PT 2540 lawn mower, to remove the casing, you will need to unscrew the air filter housing and remove it from the latches with a flat screwdriver. After that, the plastic case can be easily removed.
How to set the ignition on the trimmer
Often, owners of gasoline braids are faced with the fact that ignition does not work on their equipment. In most cases, the problem is really in this node. To fix it, you need to adjust the ignition on the trimmer. But at the same time, it is not uncommon that the ignition coil is serviceable, and the breakdown must be sought elsewhere. The ignition system is designed identically on four-stroke and two-stroke internal combustion engines, therefore, troubleshooting of this unit is performed in a similar way. In addition, the equipment of different brands has almost the same construction of this most important component of the tool, which means that the adjustment process will be identical for the Soyuz or Foreman trimmers, as well as for Huter or samples of other brands.
Ignition on the trimmer. The principle of operation and possible malfunctions
If the owner of the lawn mowers wants to set up the ignition system themselves, he should understand the principle of operation of this unit. In an internal combustion engine, it consists of a flywheel and a magneto (coil). In turn, the flywheel includes an impeller that performs the function of cooling the motor and a number of permanent magnets.
Operating principle
When the flywheel rotates, an electric current is generated in the magneto, creating a spark on the spark plug at the instant when magnets pass under the coil.
Typical malfunctions
Before starting to adjust the trimmer ignition, you need to cut off other probable causes of breakage and make sure that the problem is really in this node. To do this, it is necessary to carry out a series of actions in the following sequence:
- Inspect the ignition coil housing for damage and defects;
- Make sure that all nodes and elements that conduct current, there are no pollution;
- Check the integrity and insulation of the wiring, contacts, fastening strength, the presence of rust at the joints;
- Inspect the candle cap, as it is regularly torn off from the high-voltage wire, and they try to restore it manually, and any unreliable connection reduces the power of the electric arc of the candle;
- Check the candle, because the quality of modern gasoline very quickly disables this part, but there is another possible problem. The candle is wet;
- Make sure the circuit breaker is working.
Eliminating all possible malfunctions, you can proceed to adjust the ignition of the coil.
When adjustment is needed
It is necessary to adjust the ignition system so that the fuel ignites in the combustion chamber at the right time.
Important! When the piston compresses the fuel and almost reaches a dead center from above, a spark arises in the candle. Further, when it passes the maximum upper point, the fuel ignites, as a result of the explosion, energy is generated and directs the piston down.
If the flywheel is shifted on the shaft relative to its original position, the fuel ignites faster than the piston overcomes top dead center. As a result, the piston moves backward, and the crankshaft rotates in the opposite direction. You can determine the early ignition of a fuel by a broken launch cord, a broken starter assembly, or other breakdowns..
Sometimes ignition is late. The piston compresses the non-flammable fuel, and then goes down, and only then a spark forms. As a result, the engine either does not work, or its power decreases, and the speed rises much more slowly.
Typically, a flywheel with magnets is installed in an ideal position, precisely coordinated with the piston, and is carefully fixed to avoid bias. This suggests that incorrect part installation is not possible. But if the flywheel shift is a confirmed fact, then it is a malfunction or an accident. In this way, no ignition timing required, since problems with early or late ignition of the fuel are very rare.
Important! Adjusting the ignition system is very simple. There is no need to calculate the ignition timing. The maximum that needs to be done is to correctly set the gap between the flywheel and the coil.
Magneto Diagnostics
Magneto is a key component in engine ignition systems. This is a core coil that is surrounded by the primary and then the secondary windings. If this part is faulty, there is no spark on the spark plug, and the fuel does not ignite.
First way
Check the performance of magneto using a tester. To do this, you must perform this sequence of actions.
- Correctly configure the tester: use the resistance measurement function and set 200 Ohms to take measurements of the primary winding.
- Direct the first electrode of the measuring device to the magneto “mass”, and the second to the output contact. If the primary winding is working, the indicators should be from 0.4 to 2 ohms.
- Set the tester switch to 20 Com to diagnose the secondary winding. Then direct the first probe into the cap of the candle, and the second. To the “mass”. If everything is in order, the indicators will vary from 4 to 6 Kom, depending on the trimmer model, whether it be the Patriot 547, Husquarna 128 r or a different brand of equipment. If the circuit is broken, an infinity value will appear on the tester screen. And if a short circuit occurs, the display will show zero.
Second way
If you can’t use the tester, there is another way to conduct a test. It is important not to touch the cylinder with the electrode, otherwise the coil will be damaged.
- It is necessary to remove the cap from the spark plug. Do not unscrew the candle, as this will allow to keep the compression.
- Then you need to pick up the nail with the hat removed and firmly insert it into the cap.
- Next, the cap with the nail should be firmly tied to the cylinder with a dielectric. In this case, the electrode should be at a distance of 5.5-7 mm from the cylinder body, but not touch the mass.
- Then the starter needs to perform an imitation of starting the engine with the ignition button on. In this case, it is necessary to carefully monitor whether a spark appears, and try to determine its color.
Important! A strong spark of white color or with a blue tint testifies in favor of the serviceability of magneto. If it is weak, as well as orange or yellow, the magneto is damaged.
There is one important point that must be considered when diagnosing: unheated magneto in any state can form a powerful spark. However if it is faulty, then, having warmed up, it stops creating current, and the trimmer will not start. Later, after cooling down, the coil returns to the operating level again, the tiller turns on and for some time runs at idle or under load until the magneto temperature rises again. In this case, the part must be replaced with a new one.
On a note! In some situations, the problem with heating is not due to the fault of the coil, but because of the spark plug. This means that both parts must be checked.
Ignition Adjustment Procedure
Setting up the ignition system is simple and identical on different trimmers, be it Stihl FS55, AL-KO BC 4125 or another lawn mowing machine. First, you need to remove the casing from the engine, having previously unscrewed the fixing hardware. This disassembly step may differ on different lawn mowing models (described below). Next, you need to partially unscrew the fastener fixing the magneto with a screwdriver and turn the handwheel so that the magnets are in the upper part.
To make the optimum clearance between the coil and magneto, you must use a special template. Buying it for a single use is impractical, therefore, as an alternative, you can use a business card or a small pocket calendar, as well as A4 paper sheet folded in four. Also, a strip cut from a plastic bottle or other improvised materials having the required thickness is suitable. The optimum distance is usually indicated in the user manual. The selected item must be placed between the magnets and the coil.
Then the coil will be attracted to the flywheel by a magnetic field. While holding the magneto in this position, you need to tighten the fixture fixing it, and then pull out the business card. After that, you need to scroll the flywheel several times to make sure that it does not touch the coil at all. The process is over. The ignition on the lawn mowing is set. In more detail, the process of adjusting the trim ignition system can be studied on the Internet, where there are manys dedicated to this topic.
Features of adjustment on different models of trimmers
The ignition system is arranged in a similar way on the technology of various brands, so the process of its adjustment will look the same. The differences, if any, are insignificant. Basically they related to disassembling equipment. For example, removing the casing from the engine on different trimmers is performed with some differences. So, on Patriot devices, you first need to unscrew the bolts and disconnect the air filter housing with a slotted screwdriver. After that, the plastic cover will be very easy to remove. A detailed diagram and trimmer device for a specific model is usually shown in the tool manual.
So, you can do the ignition for a gas trimmer with your own hands. This process is simple if you know the correct procedure. But first you need to eliminate the possible malfunctions of other components and parts, for example, spark plugs or magnetos, which can be the reason for the lack of starting the engine of the lawn mowers. However, when analyzing equipment of different brands, it is necessary to take into account the likely differences in design, which are described in detail in the user manual.
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Trim Ignition Setting
Carburetor adjustment of lawn mowers can be done do it yourself
Lawn mowers, like all gasoline powered tools for the garden, are not difficult to maintain. It is possible and necessary to repair, configure without the help of others. For example, adjustment DIY lawn mowers. It’s 5 minutes.
Lawn mowing carburetor is a unit in the power system. In it, like all carburetors, there is a process of mixing air and fuel (gasoline) for the upcoming supply to the engine cylinders.
The main thing in this process is the correct proportion of fuel and air, which is why the carburetor is regulated.
The main problems and malfunctions of the carburetor.
Strainer There are only two obstacles with this element:
In order to find out the cause of the breakdown, the fuel filter cover is unscrewed to remove the strainer. If it just accumulated dirt, then washing with gasoline or blowing will help.
With visible damage to the strainer, it is imperative to install a new one. There may also be damage on the fuel supply pipe (during repair, check this element).
The carburetor starter in most cases does not work due to blockages. Use acetone or the same gasoline for flushing.
Blowing off carburetor parts with a blockage of compressed air is an acceptable and comfortable repair practice.
The throttle body, the bundles of carburetor parts, the intake or exhaust pipe. All of these parts are subject to depressurization. Probably you can check with a simple method. Spread the problem area with soap suds.
The device of the carburetor lawn mowers
The base of the carburetor of the lawn mowers is a duralumin case. It contains a diffuser (a hole with internal contours). Air is pumped through this hole. The oxygen (air) flow rate depends on the cross-section (passage opening) of the diffuser.
The diffuser is equipped with fuel channels. Fuel is drawn from them by an air stream.
Outside the carburetor is installed:
- Fuel pump;
- Jet system;
- Fuel consistency adjustment system with air;
Principle of operation carburetor lawn mowers
The throttle valve determines the amount of air to be supplied, and the motor power directly depends on this.
How to set the IGNITION on Trimmer Echo srm 22 ges.
Even more information about repair and tool selection on our website www.Looktool.Ru come in, we are glad to everyone.
Coil installation ignition on the lawn mower ROSTEH
Coil installation ignition on the lawnmower ROSTEH.
Fuel is sucked into the carburetor system by a pump (its membrane). Then it passes through the fitting in the carburetor. Further, the fluid moves through the inlet and outlet valves of the pump. Filtered by mesh. The needle valve moves into the membrane chamber.
Phased operation of the device:
- Air supply to the tube with an air baffle (damper). The partition controls the intensity of the air flow.
- The fuel supply system is certainly narrowed with a mixer to speed up the flow.
- Gasoline through the float chamber and nozzle tube with narrowing. A camera with a float adjusts the temporary volume of gasoline. In the float chamber, the pressure level is neutral, and in the tube with narrowing is already small. Due to the pressure drop, fuel leaks through the nozzle.
- The acceleration of the air flow contributes to the transfer of fuel (gasoline) and its atomization. Ultimately, an air-fuel mixture of the desired proportion or density appears.
- The air-fuel mixture enters the engine cylinder through the fuel pipe.
The level of air density in the system depends on the area of the open air damper. The wider the flap is open, the greater the fuel consumption and power.
Simply put, adjusting the carburetor on the lawn mower is creating a good fuel consistency due to the correct air supply.
How to adjust a carburetor on a lawn mower
Before adjusting, you must carefully clean the filters according to the maintenance in the annotation.
The upcoming do-it-yourself carburetor adjustment of the lawn mowers is done by adjusting screws. There are three of them:
Right (L). Adjustment of fuel consistency for low revs.
It is necessary to find the highest idle speed. To do this, slowly unscrew the screw (L) to the right and left.
To adjust, turn the screw a quarter turn without fail counterclockwise.
Bottom (T). Is responsible for adjusting the engine at idle.
- Clockwise. Increase;
- Counter-clockwise. Decrease.
For the correct adjustment of specific idling, typically:
- Steady work of the cool motor;
- Not overestimated speed of a hot engine;
- For the trimmer head a large reserve of revolutions;
- Stable operation of the motor when changing position (sharp rise or lowering of the knife).
Left (N). Adjustment of consistency at high speeds. (The screw is configured last).
The general adjustment of the highest revolutions, engine power, temperature and gas mileage depends on the left screw (H).
Setting the carburetor lawn mowers with the last screw is as follows:
- Open the throttle to full, while giving out full throttle. Turn the screw clockwise until the rpm falls (in this case, they are oriented by ear).
- Turn the screw as slowly as possible counterclockwise until the motor runs unevenly.
- Then turn back completely completely, just hearing a measured, steady work.
- For a more pleasant implementation of abilities, it is more convenient to discern the work of an experienced user:
It is curious that, based on the beliefs of the creator of the, the setting (its correctness) is determined by the color of the candle, and not just by the speed and stability of the motor.
Faithful customization do-it-yourself carburetor in this case. The combustion of the fuel consistency without residue, the color of the candle should be light brown.
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How to Set Ignition Lawn Mowings
On gas trimmers, both two-stroke internal combustion engines (ICE) and four-stroke are used. However, the ignition system there is no different from each other, because the repair and adjustment of this set of accounting programs for fuel ignition will be similar for various types of ICE.
The ignition system of a two-stroke ICE consists of 2 parts: a flywheel and a coil (magneto). The image below shows how they look.
An impeller is located on the flywheel, which acts as a fan for cooling the motor. Also, on one side of the flywheel there are permanent magnets, shown in the figure by an arrow.
When the flywheel rotates, an electronic current is generated in the coil, which serves to produce a spark on the spark plug. A spark arises just when the magnets are specifically under the magneto.
Sometimes, when the engine does not start, you will need to adjust the ignition. Of course, at first it is necessary to check the serviceability of the candle and the high-voltage cable with a cap.
It is necessary to regulate the ignition on a two-stroke engine in order to be able to ensure timely ignition of fuel in the engine combustion chamber. The following is a diagram, from busy you can understand the mechanism of the internal combustion engine.
A spark in a candle should appear at the moment of compression of the fuel by the piston, when it does not reach the top dead center (TDC) at its best. When the piston passes TDC, ignition of the fuel consistency occurs, under the influence of which the piston goes down under the action of the explosion energy.
If for any reason (mainly because the flywheel is displaced on the shaft relative to its initial position), the ignition of the fuel occurs earlier than the piston passes TDC, then it will turn back and the crankshaft will scroll in the opposite direction. This movement can destroy the starter assembly, cut off the starter cord, etc. Then happens premature ignition of fuel.
You will also like more later ignition on the trimmer: the piston after compression of the fuel, which did not catch fire, goes down, and in this case a spark occurs. Then the engine will either not start, or it will significantly lose power and will not gain momentum well.
However, such problems with early or late ignition on two-stroke ICEs are quite rare, since the flywheel with magnets is already installed in the correct position, which is completely synchronized with the movement of the piston. In addition, the flywheel is fixed to the shaft with a dowel and nut. Therefore, incorrect installation of the part is excluded.
For the most part, the ignition adjustment is to set the correct clearance between the magneto and the flywheel.
Magneto is the main part in the engine ignition system and is a coil with primary and secondary windings located around the core. Often, due to a magneto malfunction, the spark on the spark plug is lost and ignition of the fuel does not occur. To check the coil, you will need to use the tester, and perform the following actions.
- On the tester, going into resistance measurement mode, you need to set 200 Ohms. This method will check the primary winding.
- Connect one tester electrode to the “mass” of the coil, and the second to the contact coming out of the magneto. Normally, the resistance will be between 0.4 and 2.7 ohms.
- To check the secondary winding, you will need to set the device switch to 20 com. Further, one probe of the device is inserted into the cap of the candle, and the second is connected to the “mass”. Normally, the characteristics of the resistance must be in the range from 4-6 kom and above (depending on the model).
If the circuit breaks, the device will show infinity, and when closed, it will show 0 (zero).
How to change the ignition on the trimmer?
When you don’t have a tester, then use the following method, showing great accuracy so that the electrode does not touch the cylinder, otherwise the coil will burn out.
- Remove the cap from the candle. You do not need to twist the candle to save compression.
- In the cap you need to stick a nail without a hat. The nail is of such a diameter, so that it holds perfectly in the cap.
- Tie the cap with the nail to the cylinder, using a dielectric, so that the gap between the electrode and the cylinder body is within 5.5 to 7 mm (but does not touch the “mass”).
- Using a starter, simulate the engine starting a couple of times. The ignition button will fit on.
- Observe whether a spark arises and what color it has.
Normally, the spark must be strong, snow-white or have a bluish color. If the spark is weak, and its color is orange or yellowish. This indicates a faulty magneto.
You should also take into account the fact that from time to time a magneto in a cool state can give a good spark. But after heating due to internal defects, it ceases to create current. When the coil cools down, the trimmer starts up again and runs for a couple of months until the magneto warms up again. Such a coil needs to be replaced.
With a similar problem with heating, a spark plug can cause, even if the coil is serviceable, therefore it is necessary to inspect both parts.
Ignition on the trimmer is easy to adjust.
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Remove the casing from the motor, unscrewing our client remains the bolts holding it. For example, on the Patriot (Patriot) PT 2540 lawnmower, in order to remove the cover, it will be necessary to unscrew the air filter housing, and remove it from the latches with a flat screwdriver. After that, the plastic case will simply be removed.
The trimmer for giving
How to Put a Lawn Mowing Coil
On gas trimmers, both two-stroke internal combustion engines (ICE) and four-stroke are used. However, the ignition system there is no different from each other, because the repair and adjustment of this accounting system for ignition of fuel will be similar for various types of ICE.
The ignition system of a two-stroke ICE consists of 2 parts: a flywheel and a coil (magneto). The image below shows how they look.
An impeller is located on the flywheel, which acts as a fan for cooling the motor. Also, on one side of the flywheel there are permanent magnets, shown in the figure by an arrow.
When the flywheel rotates, an electronic current is generated in the coil, which serves to produce a spark on the spark plug. A spark arises just when the magnets are specifically under the magneto.
Sometimes, when the engine does not start, you will need to adjust the ignition. Surely, first you need to check the health of the candle and high-voltage cable with a cap.
It is necessary to regulate the ignition on a two-stroke engine if you set a goal to ensure timely ignition of fuel in the combustion chamber of the engine. The following is a diagram of the busy course to understand the internal combustion engine mechanism.
A spark in a candle should appear at the moment of compression of the fuel by the piston, when it does not reach the top dead center (TDC) at its best. When the piston passes TDC, ignition of the fuel consistency occurs, under the influence of which the piston goes down under the action of the explosion energy.
If for any reason (this is mainly due to the displacement of the flywheel on the shaft relative to its initial position), the fuel ignites for about 30 years, after the piston passes TDC, then it turns back and the crankshaft rotates in the opposite direction. This movement can destroy the starter assembly, cut off the starter cord, etc. Then happens premature ignition of fuel.
How put up ignition?
You will also like more later ignition on the trimmer: the piston after compression of the fuel, which did not catch fire, goes down, and under such circumstances a spark occurs. Under such circumstances, the engine will either not start, or it will significantly lose power and will not gain momentum well.
Alas, such difficulties with early or late ignition on two-stroke ICEs are quite rare, since the flywheel with magnets is already installed in the correct position, which is completely synchronized with the movement of the piston. And additionally, the flywheel is fixed to the shaft with a dowel and nut. Therefore, incorrect installation of the part is excluded.
Mainly, the ignition adjustment is to set the correct clearance between the magneto and the flywheel.
Magneto is the main part in the engine ignition system and it is a coil with primary and secondary windings located around the core. Often, due to a magneto malfunction, the spark on the spark plug is lost and ignition of the fuel does not occur. To check the coil, you will need to use the tester, and perform the following actions.
- On the tester, going into resistance measurement mode, you need to set 200 Ohms. This method will check the primary winding.
- Connect one tester electrode to the “mass” of the coil, and the second to the contact coming out of the magneto. Normally, the resistance is between 0.4 and 3.2 ohms.
- To check the secondary winding, you will need to set the device switch to 20 com. Further, one probe of the device is inserted into the cap of the candle, and the second is connected to the “mass”. Normally, the characteristics of the resistance must be in the range from 4-6 kom and above (depending on the model).
If the circuit breaks, the device will show infinity, and when closed, it will show 0 (zero).
Check THE IGNITION COIL IGNITION GROWTH
When you don’t have a tester, then use the following method, showing great accuracy so that the electrode does not touch the cylinder, otherwise coil burn out.
- Remove the cap from the candle. You do not need to twist the candle to save compression.
- In the cap you need to stick a nail without a hat. The nail is of such a diameter, so that it holds perfectly in the cap.
- Tie the cap with the nail to the cylinder, using a dielectric, so that the gap between the electrode and the cylinder body is within 5.5 to 7 mm (but does not touch the “mass”).
- Using a starter, simulate the engine starting a couple of times. The ignition button will fit on.
- Observe whether a spark arises and what color it has.