Stihl 180 Chainsaw Stalls When Pressed
Chainsaws Stihl (Stihl) 180 Review of chainsaws Stihl (Stihl) 180: malfunctions and repairs, technical characteristics, carburetor adjustment, device
Chainsaws Stihl 180. Malfunctions and repairs
The simplicity of the Stihl MS 180 household chainsaw device allows its owner to eliminate most of the tool malfunctions with his own hands. To successfully repair a model, first of all, you need to determine the causes of the breakdown. The repair algorithm is different in each case and depends on the type of malfunction.
Stihl 180 chainsaw device
The Stihl MS 180 household chainsaw is equipped with a high-quality branded internal combustion engine, from the manufacturing plant configured to work in difficult weather conditions. The single-cylinder engine of the model successfully withstands long-term high loads without increasing the amount of fuel consumed, and the forged piston group does not lend itself to corrosion and burr formation. Cooling of the engine. Improved by means of intake air masses. For more convenient operation, the Stihl 180 chainsaw is equipped with a factory vibration suppression system, and to reduce noise during operation. A proprietary silencer.
The tool clutch includes a proprietary drive sprocket. It can withstand prolonged loads and does not slip with a sharp increase in speed. This increases the efficiency of the Stihl chain saw when cutting dry thick logs.
To facilitate starting a cold factory engine, the Stihl MS 180 chainsaw is equipped with a decompression valve designed for manual pumping of fuel.
The working bodies of the garden tool are a reinforced metal tire on which the chain is stretched. For more precise adjustment of the saw headset tension, the Stihl model has a proprietary frontal device. Shields for the front and rear arms, as well as a chain catcher, are responsible for protecting the operator from a broken chain. To lubricate the saw headset, the model device has a proprietary Ematic lubrication system with a long-life oil pump. In addition, the manufacturer has included a spike bumper in the garden tool set for more accurate sawing of logs.
The Stihl MS 180 chainsaw stands out for its ease of use, which was achieved thanks to the manufacturer’s thoughtful arrangement of controls. The engine start button, throttle lever, factory plastic starter grip and OEM choke position switch are located at the rear of the model. A built-in inertia brake lever is installed at the front.
What to do if pouring a candle on a Stihl 180 chainsaw?
If the tool is used frequently, one of its fuel lines may be cut off, causing fuel to spill onto the spark plug and other saw parts.
If the fuel pipe breaks or a hole forms in it, the owner of the tool will need to remove the damaged hose and replace it with a new one. In this case, the junction of the new hose with the factory fitting must be carefully treated with a sealant.
The first thing to check is the fuel filter.
In some cases, a filter clogged with dirt is unable to pass enough fuel mixture through it. Accordingly, a fuel shortage arises in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and the new one does not have time to enter, as a result of which the Stihl chainsaw stalls. Also, with a clogged fuel filter, there may be a noticeable drop in the power of the chainsaw at maximum speed, but this is with insignificant contamination.
One of the reasons why the chainsaw does not develop speed when you press the gas, but rather stall, is a malfunction of the carburetor. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did not use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.
In order to check the injector, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor towards you a little and disconnect the fuel supply hose.
Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.
It is necessary to unscrew the cover of the main chamber of the carburetor, this is the one on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. We knock out the valve.
After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if you can freely blow the valve in both directions, then it is defective and must be replaced with a new one. Collecting the chainsaw after the valve has been repaired must follow the reverse order of disassembly.
You can clearly see how the carburetor is being repaired, or rather how to properly knock out the injector valve from the carburetor body by looking
Another common reason a saw can stall when revving up is air leaking into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work with the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.
When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and not perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.
For what reasons the Stihl 180 stalls at idle or full throttle
Any tool can break and the Stihl MS 180 chainsaw is no exception. Today we will try to understand such issues as: why the chainsaw stalls when the speed increases, also at idle and at full speed. Consider the options for diagnosing and eliminating malfunctions associated with this behavior of the Stihl 180 chainsaw.
Air filter dirty
It’s easy to make sure the air filter is dirty. You just need to remove it and start the chainsaw without it. If the saw is working normally, then it’s in it and it just needs to be changed or washed, depending on its type. And do not be afraid that the chainsaw will work for a while without dust protection. If there is no dust cloud around you, then everything is fine.
So, remove the air filter. To do this, you need to remove the cover from the rear upper part of the chainsaw, which is fastened either with screws, or simply with some kind of latch that you just need to turn or snap off.
If the saw operates normally when the filter is removed after starting up, then it is dirty.
The air filter is either felt or nylon. The first looks like cotton wool or synthetic winterizer, and the second looks like a fine mesh of nylon threads stretched over a plastic case. Felt needs to be changed to a new one, but nylon can be simply washed in soapy water, dried and put back in place.
Low oil in the fuel mixture
Let’s look at the most unpleasant case first. Why? Because before manipulating the filters, it is better to make sure that your oil and gasoline are mixed in the correct ratio.
Here, however, it is worth noting that if your saw has already been started many times (for example, ten times), but it continues to start, and then stalls again when the speed increases, then everything is apparently in order with the fuel. Otherwise, she would have simply stopped starting altogether.
But still, I recommend immediately dispelling the slightest doubts about the quality of the fuel, as soon as your saw stalled during a set of revolutions for the first time. Because if the reason is in the fuel, then, as already mentioned above, you can get into an expensive repair. Otherwise, you can still do it. To dispel doubts is to drain the old fuel from the tank and fill in fresh fuel, in which oil and gasoline are mixed in the correct proportion.
The correct ratio is best seen in the instructions for the saw. If you have lost it, then we look at the ratio on the oil package. It is usually 1:50 or 1:40. If the oil is used “non-native” (well, for example, for Stihl chainsaws, Stihl will also not be enough “native”), then I recommend using a ratio of 1:40, even if the oil packaging says 1:50.
For the exact dosage, I myself personally use a medical syringe and a measuring container in which one liter of gasoline can be clearly measured. I pour a liter of gasoline into a container, draw 25 (at 1:40) or 20 (at 1:50) cubes of oil into the syringe and add it to the gasoline.
After preparing a new mixture, drain the previous mixture from the tank, in which we are unsure, and fill in the fresh one just prepared.
Now that you have done everything to dispel any doubts about the quality of the fuel, we move on to further actions.
As I wrote above, with a lack of oil on the piston and cylinder walls, scuffs can form. And they almost always form. If you are lucky and there are no seizures, then with the new fuel mixture prepared in the correct ratio, the chainsaw should start working normally.
If seizures have appeared, then the saw may start and stall several more times, after which it will stop starting altogether. In such a situation, I sympathize with you, because, most likely, now you will need to replace the piston group, which will be very expensive.
If the saw, as before, starts up and stalls at high speeds, then we manipulate the filters.
Fuel filter dirty
If the option with an air filter did not suit you, then we try to change the fuel one. It is located in the gas tank and is attached to a hose through which fuel is taken from the tank.
This hose must be gently pryed with something and removed from the gas tank its edge, on which the filter is fixed. Here, the option with work without a filter, as in the case of an air filter, is better not to apply, since you cannot know for sure if there are any unnecessary impurities in the fuel.