New Chainsaw Won’T Start Reasons

The chainsaw does not start The main reasons and a description of the solution to the problem, if it does not start on a hot, cold one. Diagnostics of fuel and ignition systems with difficult starting.

Why does the chainsaw start badly?

  • Fuel and air filters;
  • Reduced compression;
  • Carburetor adjustment;
  • Spark plug;
  • Ignition coil;
  • The gap between the ignition coil and the flywheel;

Let’s consider each reason in more detail.

Fuel system problems

If during inspection it was found that there is a spark, and the plug is dry, then there are problems in the fuel system. Checking it should start with the fuel filter. Next, you need to inspect the fuel hose and its attachment to the carburetor, pay attention to fuel leaks from the carburetor and the presence of gasoline in the air filter housing. It is advisable to start removing the carburetor only if visual inspection did not allow determining the cause of the breakdown.

A common symptom of a problem in the fuel system is excess fuel in the engine cylinder. Typically, this is indicated by an overly wet spark plug and the presence of a spark at the plug contacts. In this situation, it is necessary to turn the chainsaw over so that the plug hole is directed downward. If, at the same time, gasoline flows from the cylinder, then the reason that the chainsaw does not start is the overflow of fuel into the engine.

The process of adjusting the carburetor can be found on the example of the Champion 254 saw, by looking at the instructions.

Chainsaw does not start well when cold Chainsaw does not start when hot

In cases where the chainsaw does not start up hot, you need to conduct a visual inspection of all the main units of the chainsaw. Inspection should start with the spark plug. Checking the spark, inspecting the surface of the spark plug electrode, these steps will help establish the direction in which to look for the problem.

Ignition coil

The reason that a new chainsaw does not start, or does not start well, may be the ignition coil. Modern chainsaws are equipped with electronic ignition coils. This part cannot be repaired, and, as a rule, if there is a defect, it changes completely.

Chainsaw stalled and won’t start

If the tool stalled and does not start, first check the presence of fuel in the tank. Oddly enough it sounds, but many people forget about it and when such a situation arises, they immediately try to repair the instrument, which can lead to serious damage.

In a situation where the saw has stalled, and there is still gas in the tank, you need to evaluate how the saw worked up to this point. Maybe at the last moment there was an extraneous sound, grinding, ringing, power loss, or the instrument stopped abruptly. All this will allow a preliminary assessment of the situation.

Identification and elimination of obvious malfunctions of the chainsaw.

To determine the reason why the chainsaw does not start or stalls when starting, it is necessary to troubleshoot the tool. The essence of the procedure is to consistently inspect the condition and operation of the main working elements of the saw motor. At this stage, we check:

  • Spark plug present;
  • Fuel supply;
  • Filter status;
  • The operation of the breather of the stalling unit built into the fuel cap;
  • Functioning of the outlet channel.

To the content

Checking the condition of the fuel and air filters.

If everything is in order with the fuel quality, the chainsaw engine may not start due to clogged fuel and air filters. To diagnose these elements, it will be necessary to perform a number of manipulations associated with their dismantling.

For the fuel filter:

  1. Disconnect the gasoline supply channel from the carburetor;
  2. Pump up fuel.

If there is little or no pressure in the pipe, disconnect the filter. Before this, free the tank from the mixture and remove the filter element itself. Dismantling is done with a wire hook. A clogged replacement cartridge that causes a poor starting of the chainsaw engine can be cleaned, but it is best to replace it with a new one. When operating the tool in dusty conditions, it should be cleaned on a regular basis.

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A clogged air filter can cause the chainsaw engine to run erratically, making it stalling or difficult to start. Dust and dirt deposited on the adsorbent material impedes the flow of air into the system, making the fuel mixture so rich that starting the tool will sometimes be difficult.

New Chainsaw Won'T Start Reasons

Checking the air filter is one of the first steps in finding the cause of a poor start.

Care must be taken when removing the air filter, as dust accumulated on the surface of the saw during operation can enter the carburetor. And this is fraught with more expensive repairs. After detaching the cartridge, thoroughly clean it from the accumulated dirt and rinse it with the addition of detergent. Dry the element and place it in place just as carefully.

Checking the spark on the spark plug and eliminating the cause.

The first step in looking for reasons why your gasoline saw won’t start is to check the spark on the spark plug. There are many factors that affect the performance of this element. However, the main ones at the initial stage of instrument troubleshooting are:

  • Incorrect carburetor adjustment;
  • The presence of more than it should be, the amount of oil in gasoline;
  • Clogged air filter.

All of them contribute to the formation of carbon deposits on the spark plug electrodes. In 50 cases out of 100, the saws do not start on a cold one due to the absence of a spark due to carbon deposits on the electrodes and their corrosion. As a result, the gap either decreases or increases.

Checking the spark plug with an idle chainsaw

  • Remove the tip of the high-voltage wire;
  • Unscrew the candle;
  • Put the tip back on;
  • Lean the candle with a skirt against the cylinder;
  • Start with a starter.

If a good spark is observed between the electrodes at the time the chainsaw engine starts, then everything is in order with the ignition unit. If it is not there, then it is worth cleaning the element itself and checking the gap of the electrodes. If necessary, use a special probe to adjust the distance between the contacts.

There may be no spark on the spark plug for other reasons. Of the main faults affecting the poor start of the chainsaw and the unstable operation of the internal combustion engine at idle, from which the tool can stall, the following can be attributed:

  • Overflow of the spark plug channel with fuel;
  • Lack of contact between the high-voltage cradle and the tip of the candle;
  • Failure of the ignition unit.

How to start a cold chainsaw if the candle channel is constantly flooding with gasoline? To eliminate the problem while starting the tool, you can use the following algorithm:

  • Unscrew the candle with a special key;
  • Wipe it with a clean and dry cloth;
  • Dry for 2030 minutes;
  • Remove carbon deposits with a file and adjust the gap between the electrodes;
  • Drain the remaining fuel from the spark plug channel and dry it;
  • Collect everything and try to start the mechanism.

If there is no spark with poor contact of the high-voltage cradle with the spark plug tip, check the connection. The check can be done using a conventional tester. If a defect is found and its elimination, the chainsaw should start without any problems.

If the check showed that the contact is reliable, and the saw will not start further, look for the cause in the ignition unit. As a rule, a faulty unit cannot be repaired or restored. It will require a complete replacement.

Finding reasons why your chainsaw won’t start

Amateur and professional chainsaws are complex devices. The service life of their two-stroke engines, components and assemblies has its limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when the chainsaw does not start or stalls is not very pleasant and sometimes confuses the user. How to identify and correct a malfunction by returning the instrument to work.

  • Identification and elimination of obvious malfunctions of the chainsaw.
  • Checking the spark on the spark plug and eliminating the cause.
  • We determine the availability of fuel and its supply.
  • Checking the condition of the fuel and air filters.
  • Checking the breather and cleaning it.
  • Checking the outlet of the chainsaw.
  • What if the chainsaw won’t start further?
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Checking the breather and cleaning it.

The breather is another element, from the improper operation of which the chainsaw may not start or stall during the sawing process. This element is located on the fuel tank cap in the area of ​​the air hole. This is a kind of valve that prevents gasoline from flowing out and equalizes the air pressure required for the free flow of fuel into the carburetor.

If the breather is dirty, the working chainsaw stalls, and when it starts it refuses to start. The thing is that air stops flowing through the hole. As a result, a negative pressure (vacuum) is created inside the fuel tank, preventing the flow of gasoline to the carburetor.

Defining the problem is pretty straightforward. Disconnect the fuel hose from the carburetor and see what happens to the gasoline. If it flows out without hindrance in a good trickle, then everything is in order with the breather. If it is absent or it flows weakly and intermittently, then the reason is identified the breather is clogged with dirt. You can solve the problem by cleaning the air hole with a regular needle or a powerful jet of compressed air.

Checking the outlet of the chainsaw.

One of the reasons that a chainsaw does not start well may be a clogged exhaust channel or its muffler. At the same time, a drop in power is noted in the process of sawing sawn timber and logs. This is most often due to resinous deposits on the spark arrestor or muffler channel, which are formed during the combustion of a poor-quality mixture of gasoline and oil, which impede the removal of exhaust gases.

Resonator clogged with carbon deposits can cause poor starting of the gasoline saw.

Eliminate the reason for the poor start of the chainsaw, in this case, you can remove the accumulated combustion products. To do this, perform a number of manipulations:

  • Remove the muffler by unscrewing the screws;
  • Remove the cooling panel and gasket;
  • Remove the spark arrester;
  • Disassemble the resonator housing;
  • Wash all elements from carbon deposits with detergent;
  • Let them dry completely;
  • Collect everything in reverse order;

It starts badly on a cold

The answer to this question is unequivocally no compression. This happens, most likely, through long-term use, they simply wore out, therefore, when you try to start the device directly in a cold state, then not enough compression to trigger directly.

But given the fact that most literate people begin to pull the handle systematically, while the rings produce friction against the sleeve, therefore, oil and gasoline get on them, the degree of compression rises and the engine starts. And when the chainsaw is already warmed up, then of course it will start to start.

But this kind of manipulation is quite harmful to the device, since several times you will achieve the desired effect through such actions, but the time will come when the chainsaw can finally break. Therefore, the best thing you can do is change the rings that are already worn out. This is not a complicated process, so you can completely deal with it yourself without using the services of the service.

Chinese chainsaw does not work

First of all, what I would like to note is that Chinese devices are quite reliable and powerful, at least as practice shows. And the reasons for its breakdowns are not much different from all other models from other manufacturers. But there is one feature that does not tolerate negligence in relation to chainsaws of Chinese manufacturers, namely fuel, which is poured directly into it.

Since many smart people think that the main thing is to fill in, and what to fill does not matter, and so it will do. And then they wonder why the device does not work.

Therefore, special efforts in eliminating this problem are not needed, simply use oil and gasoline from the manufacturer who created your chainsaw and everything will be fine. Look in more detail at:

There is a spark, the candle is wet

First of all, it is necessary to remove the muffler and carefully inspect the piston, since this is where the problem may be hiding. In addition, most owners ask themselves: why the chainsaw starts and stalls, while there are supposedly no problems with the candles?

But this is an erroneous opinion and one does not need to be so sure in this case, as there are situations when the candle sparkles perfectly in air, but does not work directly in the cylinder.

The reason for this may be direct violation of a kind of compaction in the channel area (impulsive). Or so de there is a kind of development of crankshaft oil seals, but this feature is found in very rare cases.

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But if you notice a similar malfunction of your chainsaw, then do not postpone the repair indefinitely and it is best if it is done by professionals. Otherwise, you just simply can break the piston.

Chainsaw Stihl ms 660 is the most economical of the entire line of Stihl chainsaws. Its price ranges from 3,100 to 5,500 rubles.

Why does not it start up hot

Before starting to solve this problem, it should be noted that the productive and correct operation of the engine depends primarily on the speed through the use of a starter mechanism. In most models, this minimum level is 800 rpm. An important fact is that the main reason for not planting the chainsaw is normal engine flooding.

In order to eliminate this problem, it is first of all necessary to put the damper (air) in the middle position. After that, blow it a couple of times to start the chainsaw. After the process has started, warm it up within ten seconds, then put it into running (idle) mode. After carrying out these manipulations, you can fully open the damper (air).

After that, it is worth noting that before starting the direct implementation of actions regarding the prescribed recommendations, try to start the device directly in the idle position. To do this, just pull the rope.. Since if the engine is not hot, then the plant will be produced without any problems.

But if this does not help, in this case, you should directly turn the cold screw, directly clockwise.

Remember that the higher the RPM level in your device, the easier it will be for you to start the device. And remember that the chain must be stationary relatively cold running.

Plant device

The first and almost basic element of the chainsaw is the engine, namely the carburetor two-stroke (see carburetor adjustment). Its immediate power is varied, it all depends on the model of the device and its direct purpose. For example, the power of the Ural chainsaw is 3.68 kW.

The second equally important part of the tool is a headset (saw) which consists of a chain (cutting), a tire, a sprocket, a wheel (chain). It should be added to this that completely different manufacturers provide their own specific range of this headset.

It is important that it always needs to be matched directly to the specific characteristic data of the engine. Since the larger the pitch of this kind of headset, the deeper the cut of the chainsaw will be, one might even say that the more powerful and productive it will be. But do not forget that for the full operation of the device, the engine must also not be inferior to it in power.

It is lubricated by means of a special oil directly from the second tank, which is located on the hand unit. It should be noted that the mass of this kind of tank has such features that oil and fuel, which is intended for the engine to end at the same time.

We figured out the general outlines of the device, and most likely with its basis, and now it’s time to start figuring out why the chainsaw stopped working, what causes it might be and how to fix them.

New chainsaw won’t start

In fact, in principle, there should be no problems with a new chainsaw, since all spare parts only from under the machine and are not subject to wear. The only reason that the device does not work can be either a factory defect or you are doing something wrong with respect to the instructions in the instructions. In order to eliminate this kind of problem, carefully check whether you screwed everything in and attached correctly. This can be with any technique, with the Russian chainsaw Lesnik, which is not inferior to her as a patriot chainsaw, as well as the powerful Partner 350 saw,

In addition, an important factor in instrument malfunction may be that you mixed the wrong proportions, consisting of oil and gasoline. Either you filled in such basic additives of low quality, which certainly affects the operation of the chainsaw, or completely from the wrong manufacturer that produced your tool.

Once again, carefully read the instructions, then check every action with the chainsaw to the millimeter. Read the instructions on how to properly run your chainsaw.