Chainsaw Ignition To The Planet

General information

The microprocessor-based contactless ignition system 1137.3734 (MPBSZ) is a logical continuation of the development of electronic ignition. Model 1137.3734, which has no analogues, is intended for operation in motorcycles of the IZH brand of all models with a 12 volt generator. The microprocessor ignition module allows by connecting the output wires in a certain sequence to select the desired operating mode of the motorcycle engine. MPBSZ is designed to improve the technical characteristics of a motorcycle by:
– improved cold start;
– stability of engine operation due to reduction of asynchronous sparking and optimization of the ignition timing depending on engine speed;
– reducing the toxicity of exhaust gases, fuel consumption and reducing carbon deposits on candles, due to an increase in the inductive phase of the spark;
– stable engine start when the battery voltage drops to 6 V (when using ignition coils 4412.3705, 406.3705, 3012.3705, 3022.3705);
– reducing the labor intensity of installation and maintenance of the ignition system;
– limiting the amount of current and the time it flows through the primary winding of the ignition coil to protect it from overheating and rapid discharge of the battery.

contactless ignition system izh planet

Suitable for all IZH motorcycle models (Planet, Planet-Sport, Jupiter)

with 12 volt generator.

Manufacturer LLC “SoveK” Vinnytsia.

Technical data

Rated supply voltage 12V with grounded “minus” of the storage battery.
2. The current consumption when the ignition switch is on and the engine is not running does not exceed 0.15 A.
3. The system provides uninterrupted sparking at a crankshaft speed of up to 7000 rpm, while the current consumed by the system does not exceed 2.5A (1.5A when installing the ignition coil 3012.3705, 4412.3705, 406.3705, 3022.3705).
4. MPBSZ provides uninterrupted sparking when the voltage in the on-board network changes from 6 V to 16 V, while the voltage on the spark plugs does not change and reaches 17 kV.
5. The ignition system is efficient in the ambient temperature range from minus 25 to plus 60 degrees C.
6. The microprocessor-based formation of the ignition moment used in the MPBSZ ensures the stable operation of the system in all normal operating modes of the engine.
7. This MPBSZ works with standard ignition coils, but provides the best sparking parameters with coils specially designed for electronic ignition systems (4412.3705, 406.3705, 3012.3705, 3022.3705).

Determination of fault location:

First of all, it is necessary to inspect the spark plug, if or a lot of carbon has accumulated on it, then the cause of the malfunction is most likely associated with the operation of the carburetor, piston group or fuel quality. If the candle visually looks good, it is not thrown and it is dry. make sure there is a spark.

  • Unscrew the plug, put the ignition cable on it;
  • Using pliers with insulated handles, press the candle thread to the motor housing;
  • Pull the starter handle sharply and check for a spark;

If there is no spark, replace the spark plug with a new one and test again. After making sure that there is a spark, we start the engine. But what if there is no spark even on a working spark plug? We continue to search:

  • We test the electrical cable for breakage and insufficient contact with the spark plug. We check the serviceability of the spring in the candlestick cap and the presence of contact with the armored cable;

It is best to use a tester to check the integrity of the wiring.

  • We check the gap between the ignition module and the flywheel magnetic circuit. It should be no more than 0.3. 0.4 mm.

You can set the correct gap using a feeler gauge, they are not in short supply and are available for a small fee.

Signs of a faulty ignition:

  • The chainsaw starts, but it works unevenly (troit), sneezes and shoots often;
  • The power of the chainsaw has dropped noticeably;
  • With a sharp press on the throttle trigger, dips in the engine are observed;
  • The chainsaw does not start well on a cold, strongly troit until it warms up;
  • Fuel consumption has increased significantly;

If such flaws appear in the operation of your chainsaw, then it’s time to diagnose, adjust, and possibly repair the ignition system.

Yaroslav Stembitsky, 37 years old, Zhytomyr region

“The chainsaw did not start after the winter. I pulled the starter for a long time. the hand was tired, but it would not start. Then I guessed to unscrew the candle and check for a spark. dull, there is nothing. He took off the protective cover, looked. the gap is normal. I collected everything, but it won’t start again. The day was digging until I figured out to check the contact on the candle. It turned out that the spring popped out. Why and when. I don’t know. “

Yakov Sinelnikov, 56 years old, Khabarovsk

“I bought an old chainsaw. Well, like the old one. she lay with his grandfather for three years in the garage. I tried to start it. nothing happened. He looked at the candle, it didn’t seem to fill it, dry. Unscrewed, checked. no spark. I had to disassemble and expose the gap. Instead of a probe, I cut out a homemade product from a plastic bottle, inserted it and adjusted it. The chainsaw works perfectly. the main thing is to set the gap and assemble it correctly. By the way, I also changed the candle. “

Chainsaw ignition

A chainsaw, like any device powered by an internal combustion engine, has an ignition system. It is responsible for igniting the fuel-air mixture in the engine cylinder. This occurs through the delivery of an electrical discharge that breaks through the space between the spark plug electrodes.

It is clear that without fuel ignition, no engine will start and will not work. However, the problem is not only this: the quality of the chainsaw depends on how accurately the ignition is set. In other words, fuel ignites on time or at the wrong time. Therefore, the chainsaw with knocked down settings needs to be repaired. The troubleshooting can be entrusted to an experienced mechanic, but you can repair the ignition of the chainsaw with your own hands.

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

Some Chinese chainsaws come with low-quality spark plugs. it may make sense to have several spark plugs included. In our review, we will introduce you to the device and how the ignition system works, its main problems and how to fix them.

Ignition scheme of the Druzhba chainsaw

Chainsaw ignition scheme Friendship

The main malfunctions of the ignition system of chainsaws

Roughly understanding how the ignition system of chainsaws of Chinese or domestic production works, you can already figure out what problems there may be with this mechanism and how to fix them.

High voltage wire

Next, check the spark plug wires. They can often run in such a way that many bends are observed. In those places, the wire can be damaged, while it looks perfect. Next, inspect the spark plug cap of the ignition wire. There should be no brown coating on it. If there is one, it means that the spark is not firing in the right place, but in all parts around the ceramic insulator. The cap can also be damaged. cracks, chips. The check must be carried out carefully, because due to the damaged insulating layer, you can get an electric shock.

Chainsaw ignition module (coil) problems

Husqvarna chainsaw ignition coil

The switch and the ignition module that regulates its operation can often fail. The coil may also be faulty. If all elements of the ignition system are in good working order, but there is no spark, suspect the module and the coil. And the problem of a malfunction of these elements is that it is impossible to repair the module or fix part of the coil. they need to be replaced. Of course, if possible, it is better to put the module from some old saw and see if this is the case. After all, you can elementarily make a mistake at some stage and suspect what actually works.

You should not trust all kinds of testers. they often show false information about the health of the ignition system. Only diagnostics with a different module or coil will be reliable.

If the electronic module is bad, there is such a symptom: as soon as the chainsaw heats up, a very weak spark is emitted. Also, after refueling, the unit may not start. This is due to the fact that the coil or module gets very hot, their resistance increases, so the spark weakens.

If there are breakdowns in the ignition system, and there is no experience in repairing them, you should not try to repair everything yourself. Elementary things, such as checking the integrity of a candle or wires, can be carried out at home, but more complex diagnostics, and even more so the replacement of units should be carried out by professionals. And then you can be sure of the quality of the work performed.

On / off button

A frequent breakdown of the ignition system is a malfunction of the shutdown switch. To check it, the wires are disconnected from the module and the operation of the saw is checked. If there is a spark, it’s the switch.

Chainsaw ignition. Device, circuits, malfunctions.

The ignition system of a chainsaw is a whole complex of elements with the help of which a spark appears when the engine is started. It is needed in order to ignite the fuel and bring the engine into a state of full-fledged long-term operation. The main element of the ignition system is the plug, which must be ignited whenever the engine is in the desired cycle. And although the system is reliable and well thought out, sometimes it needs to be repaired, so the user needs to know how his chainsaw works, and also what he can do to repair its ignition system.

Spark plug

Most often, breakdown occurs due to the spark plug. It is worth checking if the insulator is damaged or the electrode is not worn out. They check the entire candle for integrity and the absence of defects. this is the integrity of the wires from the coil, and the presence of insulating material, etc.

The device of the ignition system of modern chainsaws

Magneto Stihl MS 180

Ignition systems used to be rather unreliable, but now they have improved. So, in their control system there are elements that regulate the impulse depending on what the saw speed is. This allows the motor to run more efficiently, which increases the overall efficiency of the tool. In addition, such elements are important, because with them it is easier to start the saw initially.

An equally important fact is the reliability of modern systems. If earlier the ignition failed very often, now all its components are so strong and of high quality that they rarely need repair.

Chainsaw Ignition advance

So, the modern chainsaw ignition system is a flywheel magneto, a spark plug, a wire and an ignition off button. Distinguish between contact and non-contact magneto. The device of the first is quite simple: permanent magnets (installed in the rim of the flywheel), an ignition coil, a capacitor and a breaker. The coil, in turn, includes the core and the primary and secondary windings of the transformer. Another important element is the spark plug. Its design is as follows: central and side electrodes, insulator, outer case.

The breaker and the primary winding of the coil are connected in series. The breaker is turned off due to the presence of a cam on the crankshaft. The primary winding is connected in series not only with the breaker, but also with the off button. Magneto is mounted in the crankcase on the left, secured by the base on two studs and nuts.

The flywheel magnets generate a magnetic field that crosses the coil. Due to this, if the contacts in the primary winding are closed, a weak current is generated. Accordingly, when the contacts are open, there is no magnetic field and EMF is induced in the secondary winding. This generates a high voltage current, which is supplied to the spark plug and gives a spark to ignite the fuel. At this moment, the piston is almost near top dead center (4 mm below it).

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chainsaw ignition

Published on 23 May 2018

The principle of operation of ignition on a chainsaw.

Yura can’t tell the approximate cost of the kit.

and play the gap ?

The gap who does not know the two thicknesses of a beer can.

well done thanks in detail.

but if the starter is pulled tight and broke the cover a couple of times. what could be the problem?

And if the Stihl 250 hits in reverse how to turn down the ignition

After the clutch segment has flown, the saw does not start there is a spark. What is the reason.?

Please tell me the reason for the malfunction: the saw does not start well, for a long time and works as if under load, it feels like it is spinning hard, like someone is holding the knees. There is no free work.

the spark was gone, the coil was replaced, there is no spark, help, what could be more?

Why can’t you fix the module yourself? What is inside such a non-recoverable one or the block is filled with epoxy during assembly?

HELLO YOUR HELP IS VERY NECESSARY. BOUGHT 3 days ago a Makita DCS4630 chainsaw and there is a problem from the muffler a black resin is flowing, a black candle and a piston too. changed the oil to mannol for calmness (germany) did not help PROMPT WHAT THE REASON CAN DO I dilute 50: 1 according to the passport THANKS

Almost everything is correct. Nearly. because the magnet is on the other hand, but that’s not the point, it’s not removable. We have already spoken about a gap of 0.15 mm here, but :. There is one more problem (maybe a rare one, but it manifested itself on a Chinese chainsaw): it broke a place for a key on the crankshaft, while the nut was twisted in energy and there was nothing to sin there. The chainsaw started up, worked, but under load it was stupid and stalled (later ignition by 5-15 degrees). Playing with the carburetor adjustment made the machine come to life, but the adjustment only helped to start, and to work a little at idle. In general, the crankshaft and the clutch for replacement, and with them for the company and bearings with oil seals, that’s such fun! PS: One thing made me happy. I scoffed at her that the forces were, and the piston and cylinder are as good as new. Although the shaft and everything else is in good condition, if not for the key.

And on a partner, only the gap is adjustable or even earlier, later, the ignition can be set?

but I thought they (wires) need to be directly closed! I broke my whole head until I watched your video! Thank you very much)

where can you get this reel? and for how many rubles?

Thanks for the good explanation

I have a question how to check a spark on a Stihl ms211 chainsaw when the spark plug is unscrewed, there is no spark, and when you turn it it starts.

I have a question there is a spark, but it beats very strong like welding, you can’t start a saw, you can’t start a scythe, what is the reason?

chainsaw, ignition, planet

Contactless ignition Izh Planet / Sport (MPBSZ 1148.3734 WITHOUT coil, Sovek)

General information

Microprocessor contactless ignition system 1148.3734 (MPBSZ) is a logical continuation of the development of electronic ignition. Model 1148.3734, which has no analogues, is intended for operation in IZH PLANET motorcycles of all models with a 6 or 12 Volt generator. The microprocessor ignition module allows by connecting the output wires in a certain sequence to select the desired operating mode of the motorcycle engine. The use of an optical sensor eliminates all the disadvantages of other spark torque positioning systems. MPBSZ is designed to improve the technical characteristics of a motorcycle by:
– stability and dynamism of the engine due to the function of automatic change of the ignition timing depending on the engine speed;
– reducing the toxicity of exhaust gases, fuel consumption and reducing carbon deposits on candles, due to an increase in the inductive phase of the spark;
– stable engine start when the battery voltage drops;
– reducing labor intensity in servicing the ignition system;
– limiting the amount of current and the time it flows through the primary winding of the ignition coil to protect it from overheating and rapid discharge of the battery.

Technical data.

Rated supply voltage 6-12V with grounded “minus” of the storage battery.
2. The current consumption when the ignition switch is on and the engine is not running does not exceed 0.10 A.
3. The system provides uninterrupted sparking at a crankshaft speed of up to 8000 rpm.
4. MPBSZ provides uninterrupted sparking when the voltage in the on-board network changes from 5 V to 16 V.
5. The ignition system is efficient in the ambient temperature range from minus 25 to plus 60 degrees C.
6. The microprocessor-based formation of the ignition moment used in the MPBSZ ensures the stable operation of the system in all normal operating modes of the engine.
7. This MPBSZ works with a coil 3122.3705 or two-electrode ignition coils 3022.3705, 4412.3705, 406.3705, 3012.3705. On 12-volt models, the MPBSZ is operational with an ignition coil 27.3705.

MPBSZ is installed on a motorcycle using spare parts and fasteners included in the delivery set.

The manufacturer guarantees the trouble-free operation of the ignition system 1148.3734 subject to the operating conditions for 24 months from the date of sale.

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Chainsaw Ignition To Planet 5

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    When installing, pay attention to the condition of the contacts. Their working surface should be free of traces of oil, dirt and carbon deposits. Erosion is also unacceptable. If necessary, the contacts can be carefully cleaned with a diamond file (but not with a sandpaper!) Or replaced. It is recommended to rinse the new contact group in clean gasoline or acetone before installation.

    After installing the contact group, we adjust the ignition moment.

    You should also lubricate the axis of the moving contact and the felt gland (felt) of the cam. To do this, apply one drop of oil to the axle.

    Can be sprayed with lubricant.

    Adjustment

    To work, you need a multimeter or a lamp with two wires.

    Pre-adjust the gap between the breaker contacts (see above).

    Place the motorcycle on a center stand or side stand and turn on neutral and ignition.

    Remove the right crankcase cover (see p. 80).

    Unscrew the spark plug.

    We turn the crankshaft clockwise by the head of the generator mounting bolt until the piston reaches top dead center (TDC). After that, we carefully “retreat” back counterclockwise so that the piston drops from TDC by 3.5-4 mm. It is convenient to control this value by inserting a short and narrow segment of a ruler or a rod into the candle hole, putting two marks on it at a distance of 3.5-4 mm directly in the process. You can also use a caliper depth gauge, but you will have to remove the fuel tank to do this (see page 57).

    Use a slotted screwdriver to loosen the upper screw of the breaker base fastening.

    We do the same with the bottom screw.

    We install the probes of the multimeter or the wires of the circuit consisting of the lamp and the battery of the breaker terminals. In this case, one wire connects the lamp to the “mass”, the second. to the breaker terminal. Then carefully turn the base of the breaker with a screwdriver until the contacts open (the multimeter will show an open circuit, and the lamp will light up).

    Without knocking down the settings, carefully tighten both screws of the breaker base.

    We check again the gap between the breaker contacts.

    Chainsaw ignition to the planet

    Motorcycle IZH-Planet. Operation, maintenance and repair. Electrical equipment. Ignition timing, adjustment, contact group replacement

    LLC “World of Autobooks”

    Ignition timing, adjustment, contact group replacement

    Attention!

    Excessive grease can get on the breaker contacts, causing a spark failure.