Stihl 180 chainsaw will not start: reasons and repairs
Attention: be sure to make sure that the ignition is on, otherwise the spark plug will NOT show a spark in any case. Also, to make sure that the plug is faulty, and not the ignition coil, take a similar plug and check the spark on it. If there is one, the problem is solved by a simple replacement.
Why is there no spark on the Stihl Chainsaw
The absence of a spark between the electrodes on the spark plug is the main malfunction that creates problems with starting the engine of the Stihl chainsaw. To identify it, you need to Unscrew the candle and inspect it. If the spark plug is wet, proceed with further troubleshooting.
Location of the spark plug in the Stihl 180 chainsaw
What can be a prerequisite for the Stihl MC 180 saw Will not start?
Chainsaw til MC 180 Does not start. I washed the candle with acetone, sanded it with fine sandpaper. Several months It was NOT in operation, the benz with oil remained in the tank, but it had already been started from the 50th time. Tell me where to look and what to do. And also please send a repair manual if available.
Because You still have gasoline in the tank, then you need to clean the carburetor by 80 percent. This is the first. Second. The saw will start if fuel is supplied to the cylinder, there is a spark and compression. The lack of fuel supply can be seen by the dry plug (we disassemble and clean the carburetor, change the fuel filter, clean the impulse channel). If there is no spark, then change the plug, if the replacement does not help, then the magneto must be changed. If there is no compression, then the piston, cylinder and oil seals must be changed. I advise you to first remove the muffler and look at the condition of the piston (there are seizures on the piston or not).
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Add to favorites link thank Himself Housing and utilities [7.3K]
Old gasoline must not be left in the saw tank. It is 100%. Diluted gasoline loses its properties rather quickly. There are many sawmills in our area, and, accordingly, experience is accumulating, what can and cannot be done.
There was such a case: in one shop, in a short time, all saws “flew” at once, the reason was not looking for long, it turned out. Gasoline with oil in a large container from which the saws were then refueled for weeks and months. All pistons were ordered to live long. Naturally, the oil loses its properties when diluted, it is advisable to do it once, dilute a new portion every day. If left before storage. Drain from the tank.
Advice on how to find out the compression in a chainsaw: the easiest way is to lift it by the starter cable. It should descend slowly, typically “squelches” compression.
Another tip: it suppresses dust only at idle, because when you turn the checkbox to the “stop” position. The coil is shorted to ground and the spark disappears. It happens that the ignition is turned off without decreasing the speed and the short to ground lasts a very long time. NOT every coil can handle it.
Why am I writing all this. Although this information does NOT answer the question directly, these facts will help you find the cause of your malfunction, you can see what was done wrong and it is already clear where to look. (I, for example, on 270. Stihl, the ignition coil burned out. Muffled at high revs. Hurry.)
How to check for a spark: Put the unscrewed candle on the iron part of the saw and turn it with a starter; the spark is clearly visible in the room. If not, another way to make sure of this, instead of a candle, insert your finger into the cap and turn the crankshaft (it won’t kill you for sure, but an unpleasant sensation. But you will know for sure there is a spark or not)
In your case, I would change the gasoline to a new diluted one, and on the suction “cold start” I twisted it in a wet candle. Then he dried it, wrapped it in place and turned it on as always. If ignition, filters and compression are normal. She’s not going anywhere. Will work.
Add to favorites link thank Veronica [61.5K]
If the Stihl MC 180 saw does not start, it is necessary to check the air filter, gasoline supply, spark plug performance. Although it is enough to open and then close the gas cap. Ventilate the combustion chamber. Remove and dry the candle.
The reason may be. The breather (valve) is clogged, then a vacuum is formed in the gas tank when fuel is used up. Carefully clean the breather with a needle.
Add to favorites link thank Avk1978730 [1.9K]
Hello. I have had exactly the same saw for three years now, it has been working properly and starts up normally. If it started up like that before, change the spark plug, you came across with a low-quality spark plug. DO NOT save on candles, take a branded one from the catalog. Good luck.
Add to favorites link thank the brownie [24.5K]
At your request, this is an instruction on how to start the saw, but about what you can sin on if the saw did not start well, and now it does not start at all. Most likely the end of the rings has already come and there is no compression, which is why, if it starts miraculously, after working it will heat the piston by reducing the gap and then it already works normally. Need to repair! Change rings, piston is not necessary.
Second option. If the chainsaw, according to the standards, should not have already worked so much that there is no compression, then the point is in the settings of the carburetor, you need to clean and adjust the carburetor, then what you do with sandpaper will NOT bring much benefit to the turtle candle!
- I almost forgot the chainsaw sometimes starts badly if a lot of oil is poured into gasoline, or low quality oil is a special oil mixed with gasoline, and not an ordinary motor!
Add to favorites link thank Kim Jong-un [288K]
There are many reasons.
The spark plug of the Stihl MC 180 chainsaw is filled,
The fact that you washed it with acetone is not enough, it is better on gas its glow, the candle is wet, there are sparks, the saw Does not start.
Better yet, change the plug to a new one, if there is no new one, then check the gap with a feeler gauge.
All fuel, or fuel is NOT of high quality (a lot of oil, for example).
Carburetor, jets clogged, try to blow out the pumps without removing the carburetor, and not unscrewing the jets, just disconnect the fuel supply hose and blow with the pump (often helps).
Does not start, especially on a cold one, the chainsaw may due to lack of compression.
Clean the filter, especially the fuel filter, but also clean the air filter, and will not interfere.
Very often, the reason for the impossibility of introducing dust into the fuel filter is that they are clogged “tightly”.
Perhaps the ignition unit is out of order.
The carburetor is incorrectly configured (adjusted), the fuel supply channel is clogged, and so on, there are a lot of reasons and not all problems can be solved independently.
Add to favorites link thank krusu [15.2K]
If the saw was with gasoline for a long time, but did not start, then pour out the old gasoline from the tank and pour in a new one, the first time the saw will not start very quickly, and then it will start working normally. If the candle is normal, then do not forget to check the Spark, otherwise it is clean, but there is no point in it. Next, clean the air filter or replace it with a new one, and special attention should be paid to an imperceptible click, which must always be clean, otherwise the saw will start with great difficulty, I marked this place with an arrow
Well, it is not at all superfluous to check the gasoline filter, which is located in the tank, pull it out and clean it if it gets dirty. If these measures do not help, then a specialist will have to carry the Stihl, then something serious has happened. Add to favorites link thank Elden [50.9K]
Start by checking the gasoline. First, drain the entire tank into a glass jar and look for dirt, Flush the entire system and refill with new gasoline, and not forgetting in the oil.
Check the air filter, replace if necessary.
Then, without a spark, try to start several times and thereby check the fuel supply, perhaps the problem is in the carburetor.
Now we need to look at the candle and check for the presence of a spark, I would advise in any case to change it, since we climbed there.
And the last thing. This is a piston check, perhaps there is a supply of a mixture of fuel and air, there is a spark, but the piston is so broken that compression is NOT created in the cylinder.
Add to favorites link thank Konglamerantus [49.4K]
If it has started up fifty times before, then it is worth giving it to the service, since all systems need to be serviced. But the firm and the model are not bad. That is, cleaning the carburetor itself, and checking the condition of the pistons and rings. If, for example, oil is thrown into the combustion chamber, then, as you know, there is nothing good about it. The fact is that the gasoline engine of a chainsaw is not much different from a car engine, and if it does not start, then its bulkhead is required, in the worst case.
Add to favorites link thank aleandro 
Your saw may not start out. For the following signs:
- Lack of fuel supply to the cylinder, that is, no compression;
- And also the carburetor is simply forgotten and air does NOT come in, and thus there is fuel injection;
- Or there is no spark;
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Briefly about the main
This model is the pride of the German manufacturer and is a direct tool designed for a minor level of work. It can be used for no more than twenty hours a month. This wonderful device will easily help you cope with the care of your garden, prepare firewood for the winter period of time (see How to cut a tree), make cleared areas, and will also be an indispensable assistant in other areas, let’s say, simple manipulations.
We can say that these are mini-model of chainsaws. Since it has a low weight, it is 3.9 kg. It does NOT have a large mass of both oil and fuel tanks. The manufacturer has equipped this device with a two-stroke engine with enough power for light work.
over, it is quite quiet as during operation the noise level does NOT exceed 98 dB. So that you better understand the level of loudness itself, just compare its noise with spoken speech, which has an indicator of 76 dB.
The power of this model is equal to 2.6 W. It is worth noting that this is a sufficiently Substantial level of strength, taking into account that She is not a professional chainsaw. The oil tank has a volume of only 0.145 liters, and the fuel tank. 0.25 liters. The tire measures 350 mm and has a pitch of 0.325 inches.
How to check the performance of a candle
To check the spark plug for serviceability, it is inserted into the high-voltage wire cap and pressed against the engine cylinder. After that, pull the starter handle several times. It should be remembered that the spark plug is checked for serviceability only when the ignition is turned on.
Of course, every zealous owner takes care of his technique. Therefore, he always has new candles in stock. To make sure that the problem lies in the malfunction of the plug, you need to perform the above operation with a new plug. If a spark appears, it means that the faulty spark plug should be replaced with a good one. Otherwise, you should look for the problem in the ignition unit.
Checking the spark plug of the Stihl 180 chainsaw
Checking the fuel system
First you need to check the condition of the fuel filter. To remove it, you need to Unscrew the fuel tank cap. Next, an aluminum wire with a bent end will come to the rescue. With its help, remove the fuel hose, at the end of which the filter is located.
Stihl 180 chainsaw device
The condition of the filter can be checked by blowing into it. If the air does not pass, then the filter needs cleaning or replacement. If the air passes freely, you need to look for a blockage in the fuel hose by disconnecting it from the carburetor. The blockage can be removed mechanically or by replacing the hose.
If the fuel hose and filter are clean and the fuel does NOT reach the spark plug, this may be due to a malfunction of the air pulse to the fuel pump.
Fills the spark plug
In some cases, the Stihl 180 starts up and stalls or does not start at all. Then we check the condition of the candle, it can be flooded. There can be two reasons for this “overflow”. improper starting of the engine on a cold one and a malfunction of the carburetor. We try to solve the problem with the following actions:
Remove the spark plug;
Turning the chainsaw over the other side and wait until excess fuel flows out;
For better confidence, pulling the starter several times, so the gasoline will surely come out of the cylinder;
Returning the candle to its place, Install the cap and try to start the engine again with a starter.
Defective crankshaft bearings
If the Stihl 180 does not start and the fuel is supplied correctly, you will have to look further, namely into the crankshaft. Its bearing tends to wear out, which causes backlash when trying to wobble the flywheel. The fact is that in the presence of play, the flywheel magnets are attracted to the ignition coil, or rather to its contacts.
To repair and replace bearings, it is required to disassemble the motor, so this work is performed only by craftsmen or people with experience. Do NOT disassemble the engine if this is your first time.
As with other saws, the carburetor acts as the main starting device. Considering in more detail the carburetor, which the Stihl 180 chainsaw is equipped with, it should be noted that it has a single tuning screw. In other words, it is a kind of idle speed adjustment screw. In this case, the nozzle, which has a full load, is stationary all the time.
In other words, the regulation is not applicable to it. In turn, there is no way to influence the full load in any way. You also need to pay attention to the factory settings, because of which the air / fuel mixture is supplied directly to the engine. over, this principle remains regardless of the operating conditions of the tool.
A feature of the Stihl chainsaw carburetor is the presence of one screw, which is responsible for adjusting the idle speed. When using the equipment, you should always pay attention to the idle speed. A few simple steps will help to adjust this: checking the air filter, as well as the spark protection grille.
It is worth noting that repairing the carburetor of a Stihl chainsaw is considered a laborious process. If for some reason it stopped starting, you must do the following:
- Open the gas tank cap and then close it;
- Remove and Dry the candle;
- Ventilate the combustion chamber.
If such actions were unsuccessful, pay attention to the fuel supply air filter and the functioning of the spark plug. If, in your opinion, the problem was caused by a malfunction of the carburetor, then the chainsaw purchased with a guarantee is best returned to service immediately. This is explained by the fact that it is quite difficult to disassemble it yourself.
Do-it-yourself Stihl chainsaw repair
The Stihl chainsaw, the MS 180 model, is primarily used for logging and various construction work. Such equipment is used very often due to the large list of functions and capabilities. The main feature of such a model is the reduced vibration, which is very important. Naturally, during operation, the chainsaw may fail, which means that you will have to repair it.
Checking the ignition system
For various equipment breakdowns, you should always pay attention to the spark plug. To do this, carefully connect the wires, and then turn the element out using the appropriate key. Then you need to assess the condition of the candle.
- If it is dry, then this indicates that no fuel has entered the cylinder. Accordingly, the problem is not related to the candle.
- In the event that such an element is splashed with fuel, it is worth making sure that the carburetor starts correctly. The same applies to adjustment. The candle itself is carefully wiped, and then the gas supply is shut off and the starter is started. This will help get rid of excess fuel and at the same time ventilate the combustion chamber. After that, the candle is screwed into place and the mechanism is started again.
- If black carbon is visible on this element, then, most likely, low-quality oil was used during the use of the Stihl chainsaw. Also, a prerequisite may be an incorrect fuel to oil ratio or incorrect carburetor adjustment. In this situation, the candle is carefully washed, then the carbon deposits are removed with a sharp knife or needle and the electrodes are wiped. In the process of checking the spark plug, it is important to make sure that the distance between the electrodes is no more than 0.5-0.65 mm.
As mentioned earlier, black carbon deposits can be seen on the candle when viewed. In this case, experienced craftsmen recommend checking for a spark. For this purpose, the ignition cable is fixed to the candle, after which the nut and the cylinder are connected by means of pliers. Then it remains to start the chainsaw starter. If the spark does not occur, the spark plug will have to be replaced. In a situation where the use of a new element is also ineffective, it is necessary to check the high-voltage wires and the connection with the candle.
Repair of the fuel supply system
When using a Stihl chainsaw, some people complain that fuel stops flowing into the cylinder. This problem can occur due to several reasons.
- Dirty filter. In this case, remove the hose and pay attention to the fuel stream. The filter itself is carefully cleaned or replaced with a new one. For preventive purposes, it is recommended to replace this element every 3-4 months.
- Clogged breather. Making sure that this is the cause of the malfunction will help disconnect the hose. If a blockage is found, use a needle or other small sharp object.
- Lack of fuel or insufficient amount of fuel. This is due to a clogged filter. Separately, it is worth mentioning an incorrectly adjusted chainsaw carburetor. To rectify the fault, it is recommended to perform the adjustment again using the Appropriate screw.
To ensure that fuel always flows into the cylinder, the fuel filter should be periodically cleaned and replaced. You also need to make sure that the hose with the drive is tight and the diaphragms are not damaged.
It is worth noting that for the correct functioning of the Stihl chainsaw, it is necessary to choose high-quality fuel. over, its amount must correspond to the rate recommended by the manufacturer itself.
The Stihl MC 180 chainsaw is a fairly simple unit. Despite this, the repair of equipment often causes a lot of difficulties, because one malfunction can arise due to a large list of reasons. Accordingly, before you decide to start the repair, accurately diagnose the breakdown.