Chainsaw won’t start
The main reasons and a description of the solution to the problem, if it does not start on hot, cold. Diagnostics of fuel and ignition systems with difficult starting.
Clearance between ignition coil and flywheel
An incorrectly set gap between the flywheel and the contacts of the ignition coil affects the quality of sparking, which in turn is responsible for normal start-up and stable operation of the engine.
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.
Incorrect carburetor adjustment will cause the chainsaw to not develop full power. It will be difficult to start, or not at all. The carburetor setting directly affects the quality of the air-fuel mixture, which is necessary for normal engine start and further operation.
An excess of gasoline in the mixture is called overflow. The characteristic sign of overflow is a wet spark plug, after several unsuccessful attempts to start the chainsaw.
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 is worth noting 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.
The chainsaw starts and immediately stalls
The reason for this kind of malfunction may be the pouring of a direct candle at the very moment when you are trying to start the chainsaw. Since a significant amount of gasoline is collected precisely between the electrodes of the spark plug, therefore, a spark cannot be created. You can fix this kind of breakdown yourself, and you do not have to contact specialized services.
To do this, simply turn out the candle itself, and dry it. You can also try to heat up, it will not be superfluous, but remember that this kind of manipulation must be carried out exclusively through a gas burner.
Otherwise, a specific carbon deposit may appear on the very surface of the direct electrodes. In the meantime, while your candle dries out, you need to drain the excess fuel directly using the hole and leave to dry for about half an hour.
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 and attached" everything 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 have filled in such basic "additives" of low quality, which certainly affects the operation of the chainsaw, or it is completely different from the 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.
Why won’t the chainsaw start? Frequent faults and how to fix them
Chainsaws are simple in design and reliable in operation.
With proper handling, breakdowns rarely occur and are quickly eliminated if the owner knows where to look for the cause.
And yet, the question of why the chainsaw does not start cannot be answered unequivocally. This tool is basically a conventional two-stroke internal combustion engine. For its normal operation, four conditions are necessary: fuel, air, spark and lubricant.
The carburetor is responsible for preparing the air-fuel mixture, the filter cleans the air from dust, the spark is created by the ignition unit and the spark plug, and the lubricant is in the gasoline.
Reasons why the chainsaw refuses to start, you need to search sequentially, starting from the simple ones and moving on to more complex ones. Anyone who immediately rushes to disassemble the carburetor when the chainsaw does not start well when hot is at great risk. It is better to repair and adjust this unit in a specialized workshop, and not on the knee.
By the way, some manufacturers of chainsaws, so that users do not climb into the carburetor to change the composition of the fuel mixture, make the jets unregulated.
For trouble-free operation of the chainsaw, you need to pay special attention to fuel. If the fuel mixture is not properly mixed, even a reliable Husqvarna will not start. In this case, the owner will begin to look for the cause of the malfunction anywhere, but not in the fuel. To eliminate this factor, you must always prepare a fuel mixture from high-quality gasoline and the brand of oil specified in the instructions.
It must be done in such an amount that it is fully developed in 1-2 weeks. If you keep it in a canister for a month, then gasoline will lose its octane quality and problems with the saw operation are guaranteed to you.
Quite often, chainsaw malfunctions occur due to candle flooding. Gasoline at the time of launch. This problem is eliminated by unscrewing and drying the candle (without igniting!) The excess fuel is drained through the candle hole, after which they take a 20-30 minute break, then put the candle in place and repeat the start. A good owner always has new candles in stock so that when troubleshooting this part can be removed from the list of suspects.
Lack of spark is often caused by more than just spark plug failure, but also poor contact between its tip and the high-voltage wire. If this connection does not arouse suspicion during the check, but the spark does not appear when the starter is turned on, the electronic ignition unit is to blame. This unit is not being repaired, but replaced with a new one.
Remember that inspecting the spark plug provides important information. If it is dry, it means that no fuel enters the cylinder and you need to check the entire chain of its supply, starting from the carburetor. Black carbon deposits indicate improper adjustment of the carburetor, supplying too much fuel to the mixture or oil overflowing into gasoline.
If the chainsaw starts and stalls when you press the gas, this indicates poor fuel flow. The cause may be a clogged fuel filter or carburetor jet. The first node can be checked and cleaned very quickly, but in the second case it is better to trust the specialists.
Dismantling and cleaning a chainsaw carburetor requires experience and accuracy.. Therefore, only those owners who have already repeatedly and successfully performed this procedure are usually taken for it.
The air filter should also be considered, so as not to look for the cause of the chainsaw malfunction in the wrong direction. If it is clogged with dust, then you cannot count on easy start-up and stable operation.
This valve equalizes the pressure in the gas tank as fuel is consumed. When it becomes clogged, a vacuum forms in the tank and fuel stops flowing to the carburetor. This disease is treated by cleaning the breather with an ordinary sewing needle.
Removing the breather from the suspect list is easy. To do this, disconnect the fuel hose from the carburetor and see if fuel flows out of it. When the gasoline flows in full stream, the breather is clean, if the fuel from the gas line does not flow or flows out very slowly, then the cause of the malfunction is established.
Many owners of new Stihl chainsaws are frightened by the increase in idle speed after running out of the first tanks of gasoline. Experts consider this behavior of the saw to be normal and indicates that the engine and carburetor running-in is normal. Therefore, do not rush to contact the service, but just slightly reduce the engine speed with the carburetor idle screw.
If the power has dropped and the chainsaw stalls at idle speed, be sure to check the muffler, which may be clogged with tarry exhaust deposits. Cleaning the exhaust port and muffler eliminates these problems.
It is especially unpleasant for the owner when all possible reasons seem to have been eliminated: a new serviceable plug is installed, the carburetor is cleaned neatly and correctly, the fuel is normal, but the chainsaw still does not want to start.
In this case, you need to look into the cylinder-piston group. Visual inspection of the cylinder and piston in this case helps to find the cause. If chips or scuffs are noticeable on them, the saw will function normally only after replacing these parts. This problem can be eliminated by boring the cylinder for a new oversized piston.
If there are no visible defects on the cylinder and piston, then the piston rings are checked. To do this, the piston is inserted into the cylinder and slightly shaken by the connecting rod. If play is felt, then the rings are worn out and need to be replaced.
Chainsaw breakdowns often occur due to insufficient chain lubrication. Due to leakage of the oil line and clogged channels. Therefore, if the chain becomes dry, you need to urgently clean the channels that supply oil to the tire. Then an inspection of the joints of the pipes with the oil pump fittings is carried out. If a strong leakage of oil from the points of contact or cracks in the oil line is detected, the pipes are changed, and the joints are sealed with a high-quality sealant.
Some parts of chainsaws must be changed. After the expiration of the passport service life. Therefore, do not forget to look at the instructions, where they are clearly spelled out. These parts include the tire, the drive sprocket, the chain, and parts of the anti-vibration system.
If the replacement is not done on time, the wear of these components will negatively affect the serviceable parts of the chainsaw. For example, a long delay in replacing a drive sprocket results in increased vibration, which quickly breaks the crankshaft bearings.
Therefore, it is necessary to regularly check the working depth of the teeth, which should not exceed 0.5 mm. The tire resource is usually enough for 3-4 chains, after which it also needs to be replaced.
Useful for the correct operation of the chainsaw:
Why the chainsaw does not start well and stalls
In case of poor start-up of the equipment "to cold", the problem may be lack of compression, ie rings are worn out due to a long service life, they need to be replaced. Sometimes the reason that the engine does not start well in an unheated state is a problem with the muffler, as well as poor contact between the plug and the wire.
Also, the reasons for a poor start can be wear or damage to the gasket, rubber cuff in the accelerator pump of the carburetor, which causes an additional flow of air, leading to an increase in saw speed.
The reasons why the chainsaw starts and stalls
A chainsaw has long been not a luxury, but a necessary tool for those who have a summer cottage or home ownership. But, like any other technique, this tool tends to fail, despite the simple device.
The classification of the main faults includes:
- Complete absence of engine plant
- The engine starts and stalls
- Unstable tool performance
- Work stop under load
- Loss of power.
If the chainsaw does not start at all, the reason may be:
- Manufacturing defect
- Lack of fuel
- Problems with starting the ignition system
- No spark from spark plugs
- Poor fuel mixture
- Carburetor clogged
- High voltage wire problems
- Lack of compression.
Why does the chainsaw start and stall, what to do in this case? The reasons for this need to be examined in detail.
The chainsaw starts and stalls: the reason
The reason that the chainsaw can stall right after the factory lies in the malfunction of a certain part of the equipment.
- The most commonplace reason why the chainsaw started up and stalled may be the low fuel level in the tank. This can be confirmed by stopping the operation of the tool when tilting, when fuel remains accumulate in a certain place in the fuel tank. With low-quality fuel, there may also be a problem with the operation of the chainsaw, in which case it is necessary to completely replace it.
- Clogged breather, which significantly reduces fuel consumption to the engine.
- Insufficient contact of the wire cap with the plug, which leads to strong heating of the plug insulator. Contact degradation can occur due to mechanical shear or carbon deposits.
- Broken spark plugs.
- Clogged muffler, which impairs exhaust gas output, causing the engine to stop running. For this reason, the chainsaw can start and stall at idle speed. Sediment in the muffler can also appear due to poor-quality fuel or improper use of the tool.
- Poor carburetor adjustment.
- Breakage of the piston group
- Fuel filter or pump problems. In this case, gasoline may flow through the pump or poorly flow through the fuel filter to the carburetor. As a result, the chainsaw starts and stalls when the speed increases.
- Dirty air filter. Problems with this piece of equipment lead to the fact that, with increased loads on the engine, it simply cannot cope with them due to blockage and stops. A similar result is also obtained with an increase in revolutions.
- Chain shortage due to lack of or insufficient lubrication, or a problem with the chain brake.