The stihl ms180 chainsaw does not start when it is hot

Chainsaw goes out when it's warm / won't start - what to do?

The chainsaw is a particularly robust and reliable machine tool. However, problems can arise if the device becomes very warm or overheated during operation. Then the chainsaw will no longer start. A temporary cooling does not always bring the desired success. However, there are several different ways you can help yourself and get the chainsaw back to work.

The chainsaw is a strong and reliable machine tool that is used in gardening, landscaping and forestry. There are different models that work electrically or with a fuel-powered engine. The fuel-powered chainsaws are primarily used because these machines allow completely independent work. You do not need a power connection and annoying cables do not hinder your work. Although chainsaws are very reliable and robust, it is not uncommon for them to overheat after prolonged use. The chainsaw gets very warm and there comes a moment when it shuts down to avoid damaging the engine. This is very annoying when you need the chainsaw and you haven't finished your job. You should therefore take preventive measures in good time so that such overheating does not occur in the first place.


Causes of the warming

The causes of excessive heating of the chainsaw during operation can be very diverse. The most common reason is that the engine is overheating from prolonged use. Especially older models that are not yet equipped with overheating protection have problems in this regard. With modern chainsaws, the engine is stopped in good time. This way the engine cannot be damaged. For you, however, this means that you have to stop your work. This may not be so bad in the home garden. However, when you have a professional commercial or forestry job to do, chain saw exposure can become a real problem. For this reason, you should know the causes of the warming up of a chainsaw and take precautions in good time so that you can use the machine without interruption.

In the rarest of cases, it is necessary to buy a new chainsaw. Often times, small repairs and good maintenance can prevent excessive heating and work continuously with the chainsaw without taking breaks.

Prepare to use the chainsaw

For unrestricted use of the chainsaw, it is an advantage if you optimally prepare for your assignment. Check the oil level on a fuel-powered chainsaw and make sure the fuel has not been down too long. Of course, the fuel should be enough for the planned work. Stock up with a canister if you think there is not enough tank capacity for your planned work.

A visual inspection of everyone Ventilation slots is important to ensure that the motor is adequately cooled. Make sure that the chainsaw runs smoothly even when idling and do not plan any work that could overwhelm the engine.

If the summer temperatures are very high, you should plan your work in the evening hours. However, it is imperative that you observe the rest times, because a chainsaw has a very high noise level during work. With optimal preparation, you can ensure that you can work with the chainsaw without problems or failures.

Tips to prevent excessive heating:

  • Take a break every ten minutes and let the engine cool down
  • divide the work into various smaller stages
  • Decision to buy a powerful chainsaw
  • fuel-powered models are more resilient than electric motors
  • Service the engine regularly

To avoid overloading the chainsaw:

  • structure your work by dividing the work into several sub-areas
  • Avoid continuous running and switch off the chainsaw whenever you take a break from work
  • keep an eye on engine heat throughout the activity
  • use two chainsaws alternately for extensive work
  • check and clean the filter and carburetor regularly

Maintenance of the engine

If you have chosen a chainsaw with an electric motor, you benefit from the fact that it is maintenance-free. In contrast to the petrol engine, you do not need any oil to operate it. However, you should keep in mind that electric motors are not as tough as fuel-powered motors. It is therefore very important that you keep an eye on the heat generated by the unit while you are working. Electric motors can get hot very quickly when overloaded. Not all chainsaws have a mechanism that switches off the unit in good time. If an electric motor burns out, it is defective and can no longer be used. Modern chainsaws are also equipped with a mechanism for electric motors that switches the motor off before it overheats. You can take preventive action by avoiding working with the chainsaw in unusually high temperatures.

Chainsaws with four-stroke petrol engines are much more robust and work very reliably even at high temperatures. When using these chainsaws, make sure that you regularly do the motor oil switch. As with the car, the engine oil is indispensable for reliable lubrication and thus for the smooth operation of the engine. If you are not going to use the chainsaw for a long period of time, drain the fuel completely. Old fuel can lead to increased wear and tear on the engine and thus to overheating. If you only use the chainsaw occasionally, it is advisable not to fill the tank completely with petrol. Even if you do not use the fuel-powered chainsaw regularly, you will need to change the oil. The Oil change should be carried out once a year, regardless of how often the chainsaw is used. If you are not going to use the chainsaw for a long period of time, it makes sense not only to drain the fuel, but also the oil.

Checking filters, hoses and seals

If the problems with the chainsaw overheating occur despite optimal maintenance of the engine, it can help if you thoroughly check all the filters, hoses and seals on the chainsaw. It can make sense to replace individual components. It is important that the fuel tank is ventilated for proper function. To this end, the machine has Ventilation slots. Check that the ventilation slots are clear. Foliage or stubborn dust may have accumulated in these slots. In this case, you should clean the ventilation slots. Then the motor is optimally ventilated and rapid overheating is prevented.

A common cause of the sudden silence of the engine is inadequate ventilation of the tanks and the Clogging of the fuel hoses. Check these components as well. It is not uncommon for old gasoline to clog a gasoline hose. If you fill the tank of your chainsaw with fresh fuel before each work, you can prevent clogging.

In this context, too, pay attention to the following things, which under certain circumstances can also clog the tank:

You should change the oil filter every time you change the oil. If the oil filter clogs, the engine will not work optimally and will fail. The engine can also overheat due to a clogged oil filter.

Compression problems

Problems with compression can sometimes lead to fuel-powered chainsaws failing when the engine generates little heat. If the compression of the engine is not set optimally or if defects are responsible for too high or low compression, localizing the fault and repairing it requires specialist knowledge. You can only successfully complete the repair if you are familiar with building a fuel-powered engine.

The piston rings can cause problems on older engines. Defects Piston rings ensure that the compression of the engine is not optimal. Even if the temperature is low, the engine cuts out and you can no longer work properly with the chainsaw. The engine draws in secondary air and it is not uncommon for a so-called piston seizure to be the cause. If you can still get new piston rings for your chainsaw in stores, you can dismantle the motor and replace the pistons.

Check the entire Ignition system and make sure an ignition spark is transmitted. Replacing the spark plugs and / or the ignition caps can be helpful in older engines to prevent overheating. If necessary, you can also replace the entire ignition system.

Check that too Fuel filter and make sure that the cylinder base gasket and the impulse hoses are not defective. Problems of this type are also very common with older engines. For many makes, you get spare parts for a period of at least ten years, so you don't have to invest in buying a new chainsaw.

There is also a seal between the engine and the carburetor that can be replaced if necessary. Also make sure that the Carburetor is set correctly and free of contamination. Older carburettors can be readjusted manually. It is possible to dismantle the models and clean them completely. In addition, the carburetor can be replaced as a component.