How to set the ignition on a chainsaw Ural • CIMFLOK.COM

How to refuel the Ural chainsaw?

Resourceful people have long figured out how to convert their outdated Ural models to 92 gasoline. To do this, you need to lower the octane number of AI-92 or AI-95 gasoline by adding 70 g of diesel fuel to one tank of the fuel mixture. The engine practically does not feel the difference with such an additive and operates normally..

The proportion for the gas-oil mixture should be as follows: 50 ml of engine oil (preferably not for mopeds) per 1 liter of gasoline.

Chainsaws “Ural” – pros, cons, adjustment, repair, review of models

Chainsaws “Ural” have been known for more than half a century: their production began in 1955 at the Perm plant, which had been working for the country’s military-industrial complex for many years. Until now, their popularity has not faded: demand still remains high despite the abundance of new foreign brands. Some do not want to overpay: the purchase of the Ural chainsaw is more budgetary than similar devices from leading European manufacturers. The same applies to their maintenance, repair, which save the family budget..

But most of the users of these chainsaws appreciate the traditional quality, which has been tested by decades of service of more than one generation of people..

We will get acquainted with the features of the legendary saws of this manufacturer, their structure and functionality, as well as the nuances of maintenance and repair, in this article..

Adjustment of the carburetor of chainsaws “Ural“

Before leaving the factory, all chainsaws receive factory settings, which are retained for a certain time. After purchasing new equipment, the question of how to adjust the carburetor on the Ural chainsaw becomes central. Do not rush to readjust the carburetor after purchase: let the saw run for several hours at low revs. Gradually adjusting the jet clockwise, they switch to high revs, during which the saw should not hum and smoke much. If this happens, the screw is tightened: the fuel mixture will become leaner. Following this principle of adjustment, the saw can always be adapted to any load.

New ignition on ural dnepr. Microprocessor contactless. Install guide.

Chainsaw “Ural” 2t Electron

Gasoline hand tools designed specifically for tough working conditions and advanced tasks.

The device of the Ural 2t Electron chainsaw is quite simple. The main working details are:

engine;
starter;
reducer;
switch;
cutting headset;
gas tank.

There is also a steering wheel and an element on which the structure can be supported..

Technical features of the chainsaw “Ural” 2t Electron

2-stroke engine that consumes 632 ml of fuel per hour of operation;
high power – 3.68 kW;
46 cm tire with detachable chain;
heavy weight – 11.7 kg.

“Cons” chainsaws “Ural”

While there are many advantages to this technique, it is not without its drawbacks. The main ones are:

a large amount of poisonous exhaust;
frequent clogging of the air filter;
high gasoline consumption;
from here come frequent problems with the engine and gear part

Consider the range of gasoline saws from this manufacturer.

BP-3800

Sufficiently compact and lightweight chain chainsaw. Decent semi-professional unit adapted for medium loads.

It differs from other modifications:

thrust of 3.8 kW;
voluminous tanks for fuel and chain oil – 0.62 and 0.25 liters;
standard chain pitch – 3/8;
long bus – 35-45 cm;
light weight – 6.89 kg.

“Ural” BP-3650

A productive model with improved functionality. Inertial chain brake and auto stroke simplify operator maintenance tasks.

Operating parameters of BP-3650:

propulsion thrust – 3.9 kW;
capacious gas tank – 0.55 l;
volumetric oil sump – 265 ml;
maximum bus length – 0.45 m.

How to properly run in a new Ural chainsaw?

the proportion for the break-in mixture is 15: 1, i.e. the amount of lubricant increases;
the first 25 hours of running-in should start with idle speed, which is gradually replaced by minimum and average working revolutions;
this process ends after the consumption of 4 full gas tanks of the fuel mixture.

For successful operation, it is necessary to adjust the tool – adjust the idle speed and the ignition system so that it gives out the power put into it, works economically and breaks less often.

How to set the ignition on a chainsaw?

Quite often, owners of chainsaws are faced with a problem in which the engine of the tool does not start. One of the main reasons for this breakdown is a malfunction of the ignition system, namely, a failure of the factory settings of the unit.

First of all, the owner of the saw will need to unscrew the protective rubber cap and check the spark plug under it. It is possible that it is flooded with oil, which prevents the flow of current to the candle. In such cases, the problem lies not in the ignition system, but in the fuel system, namely, in the depressurization of the channels..

However, if the spark plug is completely dry, then it may be necessary to install the ignition on the chainsaw. To do this, unscrew the candle and dismantle the protective cover. After that, it is necessary to measure the gap between the flywheel and the ignition coil. The instructions for each of the chainsaw models indicate the optimal clearance between these elements. In most cases, it is between 0.2 and 0.4 mm. Since the handwheel of the tool has a round shape, it will not be possible to use an automotive dipstick to adjust the gap. It is best to use a special template in the form of a spacer for this purpose. However, finding it is not easy. Therefore, many experts advise using a cut out strip from a plastic bottle as a template..

Chainsaw ignition adjustment is quite simple;

First, loosen the bolts securing the elements of the ignition system;
Place the plastic bottle plate between the spool and the flywheel;
Tighten the bolts all the way.

If you did not find any visible reasons for the malfunction here, the candle is dry, light carbon deposits continue to go from the opposite direction. Since this is the final point of ignition of the working mixture. The lawn mower crankshaft is the cause of the breakdown. Now check if the spark is coming to the spark plug. This is the ignition system block.

Checking if there is a spark will not pose any special problems, for this it is enough to take the high-voltage cable to which the candle is connected, bring it to the cylinder block, setting a small gap between them, so that you can notice the spark slipping between them. Then we pull the starter starter cord, and see if there is a spark and what color it is. A working spark plug should give a spark similar to lightning. How it looks, look at the photo offered to your attention, everything is clearly visible on it.

If no spark is observed, check with a control lamp, if there is no probe, high-voltage cable. A break is possible in the place where it was bent most often. If the wire is in order, it is possible that the problem is an incorrect ignition angle. It may be too early or too late in both cases, the chainsaw starts well and will not work.

Now let’s try to set the correct gap between the movable and fixed contact. Ideally, it should be 0.2 mm. You can check with a probe, since it is not a deficit.

This was a description of the faults of the older generation of chainsaws. The new generation includes modern chainsaws from Goodluck, Stihl and Husqvarna.

The device and principle of operation of the chainsaw ignition system

The ignition system of modern chainsaws consists of a list of important parts. The main structural elements are:

Spark plug;
Flywheel magneto;
Wiring;
Power button.

The ignition system also includes an ignition coil, an interrupter and a capacitor. The coil is responsible for turning on the core and winding the transformer. Candles in the construction of nodes consist of side and center electrodes, an outer casing and an insulator.

The breaker and coil winding in the structure are connected in series. The breaker is turned off due to the presence of a cam on the crankshaft of the chainsaw. The ignition magneto is located to the left of the crankcase and is secured with a nut and two studs.

In the process of starting the chainsaw, a magnetic field is generated with the help of the flywheel magnets, which crosses the coil. Provided that the contacts of the primary winding are in a closed state, a weak current is generated in the ignition system. If the contacts are in the open state, then the magnetic field is not formed, which leads to the appearance of a high voltage in the secondary winding. Subsequently, the current is supplied to the candle, which ignites the fuel to start the chainsaw..

HOW TO SET THE CLEARANCE of the ignition coil, Chainsaw Partner, McCulloch, Jonsered, the magneto clearance

The video talks about the ease of adjusting the magneto gap using the wall of a plastic bottle. Repairs.

How to set the ignition on a chainsaw

In this review presented to your attention, we will try to reveal the question that arises among many owners of chainsaws. During the operation of such a tool, the consumer may be faced with a situation in which it is necessary to correct the ignition timing. Over time, the breaker may fail, the coil is also not eternal, although it serves much more and it is difficult to disable it. So let’s figure out how to set the ignition on a chainsaw.

Chainsaw ignition setting technique

First of all, it is recommended that you check the spark plug for good condition. If you dismantled the spark plug and saw that it was covered with a solid layer of fuel, the carburetor is faulty. It needs fine tuning.

If the candle turns out to be dry, you should not blame the ignition again. Carburetor does not emit enough fuel.

The only ignition problems may be due to the lack of spark generation. In most cases, a trivial candle replacement will fix this problem..

Professionals recommend changing the filter frequently. In this case, the engine resource can be increased significantly..

If you have already disassembled the saw, and after assembly there were problems with the ignition, then most likely the gap between the flywheel and the magnetic circuit was violated. According to the technical parameters, this gap should not exceed 0.2 mm..

Gap setting should be done using a special gasket..

A specialist will give specific advice on choosing a chainsaw that will fully meet your needs:

Constructive components

All engines, be it a car or another tool using a gasoline engine, have similar mechanisms of work..

No exception there are such famous chainsaws and are used with pleasure by consumers like Goodluck, Stihl or Husqvarna.

The drive in them is the familiar internal combustion engine, respectively, a fuel tank, an engine and a working body that directly performs work, as well as other attachments that help in control.

Sometimes during operation, some problems may arise, in this rather reliable tool like a chainsaw.

Possible malfunctions

If the saw does not start, the first thing to check is the spark plug that ignites the fuel in the cylinder. Start by removing the high voltage wire that the candle is connected to. Then unscrew the spark plug itself from the cylinder cover and inspect its condition. When working properly, the candle should be dry and small deposits on the light-colored ceramics:

If the plug is wet, there is a problem with the carburetor. It is necessary to adjust and set the fuel level in it;
Carbon deposits on the walls of the plug are dark or black in color, it means malfunctions in the piston group.

How to check the ignition coil of a chainsaw?

There are several effective ways to check a factory ignition coil. The first one is visual. To do this, the operator must carefully remove the magneto from the saw structure, having previously disconnected all contacts connected to it. After that, you need to inspect the item..

Most often, its malfunctions consist in:

damage to standard insulation, initially caused by gradual or sharp overheating, increased vibration, as well as voltage surges in the created electrical network. All this leads to a short circuit in the factory windings of the coil;
violation of the integrity of standard high-voltage wires – the result of this is overload and breakage of electrical wires.

In any of these cases, you will need to immediately replace the electronic ignition of the gasoline chain saw..

The second way to check the coil is to test it with a multimeter.

This requires:

Connect the device to the positive and parallel negative factory contacts, having previously configured it in the mode of constant measurement of the generated resistance;
After ringing the built-in coil, you need to look at the device. In household chainsaws from different manufacturers, the resistance values may differ from each other. Typically, the average is around 0.4–2 ohms. If zero resistance is displayed on the multimeter used, then an accidental short circuit has occurred in its standard winding. In few cases, the device can show infinity – then the operator will need to find an open circuit.

In each of these cases, the repair of the factory ignition coil is carried out only through a complete replacement of the part..

Each of the methods allows you to obtain information about the health and stability of the factory ignition system of a gasoline saw. In some models of garden power tools, manufacturers provide for the possibility of replacing only the defective coil. In other cases, owners of chainsaws are required to replace the entire ignition system..

How to determine the advance angle of the built-in ignition?

The design features of the built-in ignition coil ensure coincidence between the factory optimal position of the moving piston and spark plug discharge. During the operation of 4-stroke power units, the spark must jump before the piston returns to the uppermost position. This is due to the fact that such engines take longer to burn fuel. In their factory device, the speed of the internal combustion engine parts is equal to the speed of the planned ignition of the refueled fuel. In this regard, the piston manages to pass a certain path from the moment of instantaneous breakthrough of the created spark to the place where the candle is located. up to the period during which the burning gases are guaranteed to have time to create extremely high pressure indicators.

During the mass assembly of engines under standard factory conditions, manufacturers do not perform ignition adjustments. Instead, markings are left on the rotating elements that must be aligned during installation..

Major malfunctions and their elimination

If you cannot start the saw the first time, there may be several reasons. The most common problem is with the spark plug:

electrode wear or damage to the ceramic insulator;
loose fitting of the removable cap (if any);
sparkling along the ceramic winding, which is indicated by a brown residue on the outer shell;
cracks in the cap of the candle (a saw with such a problem will continue to 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 can be cut off or have other mechanical damage. There may be wire breaks inside the insulation, so sometimes these violations cannot be detected by visual inspection..

The cause of the breakdown may lie in the shutdown switches. It’s easy to check them. To do this, you need to disconnect the wires from the module, and then check the ignition. If a spark appears after shutdown, the switch must be replaced..

How the ignition of a chainsaw works and how does it work, their main malfunctions and elimination

Gasoline saws are necessarily equipped with an ignition system. It is necessary for timely ignition of the fuel mixture in the engine cylinder. Therefore, it is so necessary to install the ignition on a chainsaw and its periodic adjustment, since the tool simply will not start without a spark..

Design features of the factory ignition system

The ignition system for a domestic or professional chainsaw initially consists of:

magneto, or factory ignition coil;
candles with a pre-installed cap;
electrical high-voltage wiring, pre-connecting the spark plug to the coil;
keys that instantly turn off the running power unit of the chainsaw.

In the device of a household gasoline tool, magneto is a kind of generator responsible for the continuous generation of alternating current with the subsequent transfer of energy to the built-in candle. The design of the magneto initially consists directly of a standard stationary winding of an inductive coil, as well as a permanently operating magnet pre-installed on the built-in flywheel.

Magneto, provided in the standard built-in ignition device for household and professional gasoline saws, are divided by equipment manufacturers into:

contact – in the design of these nodes, the first output of the built-in factory high-voltage winding is connected to the spark plugs. In the basic design of the contact magneto, a capacitor is initially provided, which prevents overheating and gradual oxidation of the contacts of the standard breaker;
non-contact – the principle of operation of units of this type is based on the operation of the built-in control coil of the factory, which, at the same time, plays the role of an element that regulates the supply of voltage. During the regular opening of the thyristor, the standard capacitor begins to actively discharge. As a result, a sufficiently high current is continuously generated in the turns of the high-voltage factory primary winding, which is inducted into the high-voltage voltage. It leads to an instantaneous breakdown at the built-in spark plug located in the cylinder of the power unit. The electrical network of the non-contact magneto operates stably in the mode of continuously generated short-term pulses generated in time with each forward movement of the factory cylinder and the corresponding rotation of the engine crankshaft.

Manufacturers of chain garden equipment use different types of factory magneto in the configuration of chainsaws. The main difference between them lies only in the principle of action. At the same time, contact and non-contact magneto have approximately the same working efficiency..

How to set the ignition on a chainsaw?

However, if the spark plug is completely dry, then it may be necessary to install the ignition on the chainsaw. To do this, unscrew the candle and dismantle the protective cover. After that, it is necessary to measure the gap between the flywheel and the ignition coil. The instructions for each of the chainsaw models indicate the optimal clearance between these elements. In most cases, it is between 0.2 and 0.4 mm. Since the handwheel of the tool has a round shape, it will not be possible to use an automotive dipstick to adjust the gap. It is best to use a special template in the form of a spacer for this purpose. However, finding it is not easy. Therefore, many experts advise using a cut out strip from a plastic bottle as a template..

Chainsaw ignition adjustment is quite simple;

First, loosen the bolts securing the elements of the ignition system;
Place the plastic bottle plate between the spool and the flywheel;
Tighten the bolts all the way.

How to check the ignition coil of a chainsaw with a multimeter?

A special device – a multimeter – will help to accurately determine the breakdown of the chainsaw ignition system. It will make it possible to determine if there are breakdowns in the coil and other elements of the assembly. The procedure is as follows:

First, you need to set the multimeter so that the arrow of the device is located at the 200 ohm mark;
After that, you need to open the instruction manual for the chainsaw and study the optimal resistance indicated there for the primary winding of the ignition coil. As a rule, this indicator ranges from 3 to 5 ohms;
Next, you need to connect the primary ignition coil to the device. If the indicators of this part of the coil are normal, we begin to check its secondary winding;
We study the operating instructions again, and look at the optimal resistance indicators indicated for the secondary winding. It is worth noting that this part of the element has large indicators, so the multimeter should be adjusted so that its arrow is located next to the 20K indicator;
Next, we connect the device to the coil hole into which the wires are inserted. If the multimeter shows normal readings, then the coil is fully functional. However, if the resistance on the device display is far from the parameters specified by the manufacturer, then the coil will have to be changed..

The device and principle of operation of the chainsaw ignition system

The ignition system of modern chainsaws consists of a list of important parts. The main structural elements are:

Spark plug;
Flywheel magneto;
Wiring;
Power button.

The breaker and coil winding in the structure are connected in series. The breaker is turned off due to the presence of a cam on the crankshaft of the chainsaw. The ignition magneto is located to the left of the crankcase and is secured with a nut and two studs.

The device and principle of operation of the chainsaw ignition system

The standard ignition system for a carburetor engine consists of:

magneto;
spark plug;
an electrical cable connecting them to each other;
engine shutdown keys.

Ignition scheme of the Ural chainsaw

Magneto is a type of alternator that supplies electricity to spark plugs. It consists of a stationary winding of an inductor and a permanent magnet attached to a flywheel that rotates with the crankshaft of a gasoline engine. The moving magnetic field creates an electromotive force in the low-voltage winding, which is converted by the transformer into a voltage with a potential sufficient to generate a spark.

For contact magnets, the first terminal of the high-voltage winding is connected to the spark plug, and the second is connected to the ground through a mechanical switch. At a certain moment, a special structural element divides the contacts, which leads to a sharp increase in the voltage in the network and a spark slip in the interelectrode space of the candle.

To prevent overheating and oxidation of the breaker contacts, a capacitor is connected to the electrical circuit.

The ignition circuit of a chainsaw with a contactless magneto is based on the operation of a control coil, which plays the role of a voltage supply regulator. The electronic unit also includes a diode, a capacitor and a thyristor, which transmits a current with a voltage of a certain magnitude. When it is opened, the capacitor is intensively discharged, forming a current in the turns of the primary winding, which is inducted into a high voltage, giving a breakdown on the spark plug installed in the cylinder. The electrical network operates in a pulsed mode in time with the rotation of the crankshaft and the translational movement of the cylinders.

Ignition timing

The mechanical device and the factory setting of the magneto ensure that the discharge time of the spark plug coincides with the optimal position of the moving piston. For four-stroke gasoline engines, spark breakthrough must occur even before the piston reaches top dead center – this is due to the fact that the process of complete ignition of the air-fuel mixture takes a certain time. The speed of movement of engine parts is comparable to the speed of fuel ignition, so the piston, from the moment of spark breakthrough until the moment the burning gases create extremely high pressure.

There is an ignition timing for each engine. It is equal to the rotation of the crank, expressed in degrees, from the moment of breakdown in the interelectrode space of the spark plug until the moment when the piston is at top dead center. This indicator depends on many parameters, including the design features of the engine and the properties of the fuel mixture..

In practice, during the mass production of an engine at the factory, individual adjustment of the ignition of each product is not made, but the corresponding marks are set on the rotating parts, which must be aligned during installation..

When is the ignition setting required? There are the main symptoms of a system crash:

the engine will not start;
the motor works, but with noticeable interruptions;
there is a decrease in tool power.

In these cases, you should not rush to contact the service center. Try to adjust the ignition yourself first.

Chainsaw ignition adjustment

The procedure for checking and adjusting the correct operation of the engine

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

Chainsaw Ignition advance

Dismantle the spark plug and inspect it. A dry candle with a slight brown tint of the electrodes can be considered serviceable..

Spark plug carbon deposits

Chainsaw ignition coil

When installing a new electrical module on the engine, the magneto gap must be adjusted. The optimal distance between the flywheel and the ignition coil is 0.2-0.4 mm for most chainsaws.

Clearance between magneto and flywheel

To be sure, it is recommended to carefully study the documentation for the purchased model and follow the manufacturer’s requirements..

With such a small gap, it will not be possible to use an available measuring tool for direct measurement. In practice, a Husqvarna saw uses a template in the form of a spacer cut from thin, flexible sheet material of the required thickness. It is clamped in the space between the flywheel and the coil when it is installed, and then pulled out.

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

Sources:

http://agropovolgie.ru/benzopily/kak-vystavit-zazhiganie-na-benzopile-ustranenie-polomki-v-kratchajshie-sroki-sobstvennymi-silami.html
http://vdartebe.ru/benzopila/nastrojka-zazhiganiya-benzopily.html
http://tehnika.expert/dlya-sada/benzopila/vystavit-zazhiganie.html