How to clean a chainsaw air filter. How to measure compression with a pressure gauge

Cleaning the chainsaw air filter

“Rich” or “poor” fuel mixture sooner or later will cause a breakdown. Possibly even expensive. To prevent this from happening, it is a good idea to regularly check the filter for abrasions, as well as for a breakthrough of the filter web itself.

How to Check and Replace the Fuel Filter

To check the current condition of the fuel filter you need to do the following steps:

If the gasoline comes in irregularly and jerkily, it is time to put in a new filter element. It’s pretty easy to do:

  • Unscrew the fuel tank cap.
  • Use tweezers or any other device to remove the filter itself.
  • After disconnecting the old filter, you must put the new filter in and lower it into the fuel tank.

How to Clean the Air Filter

If there is not enough air in the tank the fuel mixture becomes over-enriched which leads to malfunctioning of the engine. Regular blowing of the air filter and, in especially severe cases, washing in a soapy solution will avoid such problems.

Pay attention that washing in acetone, gasoline or other aggressive solutions is not allowed. It can lead to violation of filter element integrity

Is it possible to make a null filter with your own hands?

On the Internet you can find a lot of information about the manufacture of zero resistance filter with their own hands. Of course, such filters can not reach the efficiency of transmission and quality of filtration provided by the factory products.

clean, chainsaw, filter

The modern zero filter is a high-tech product, and to assemble it in the garage is not possible. But it is possible to make a filter similar in parameters at least. The area of the filtering surface is usually increased by using filters from equipment with a large engine volume (cars). The point is to connect the carburetor and a large non-standard filter, while preventing the contaminated air suction at the junction. There is a lot of information about such modifications and you can easily find it on the Internet.

Changing the fuel filter on a chainsaw

As with all fuel-fueled machines, chainsaws have a fuel filter in the fuel tank.

The main symptom of a faulty gasoline filter is that the chainsaw stops when you apply gas.

How to change the filter on the chain saw:

  • No need to drain the gasoline mixture when replacing the filter element.
  • Use a large piece of wire and bend the end like a hook.
  • Unscrew fuel cap.
  • Dip the hook into the tank and hook the tube with the filter on the end. The tube is fairly short, so don’t pull hard when you remove the filter, it’s just long enough to do the replacement.
  • Hold the tube with one hand and pull the filter with the other and remove it from the port. insert a new one.
  • Make sure the filter is firmly seated in the port. Dip the tube with the filter into the tank. When you start the engine, the filter will drop to the right position on the bottom.

Troubleshooting Chinese chainsaws: an overview of popular problems and solutions

Buy a cheap chainsaw made in China is not particularly difficult: in markets, construction hypermarkets and online stores there is a huge number of chain saws from the Celestial Empire. But the low price almost always hides poor quality.

The most popular malfunctions of Chinese chainsaws should include:

  • Lubrication system malfunctions. Clogged oil passages are cleaned, and if the oil pump has failed, it is necessary to replace.
  • The starter rope breaks.
  • Breakage of plastic starter shaft. For its replacement will fit a regular metal bolt.

If you have even the slightest suspicion that a chain saw is malfunctioning, it is worthwhile to run a complete diagnosis right away. Only with proper operation and timely maintenance can you count on a long life of the chainsaw.

How to clean the muffler on a chainsaw

Taking timely steps to clean your chainsaw‘s muffler can seriously extend the life of your tool. There are several reasons for a dirty muffler:

Two-stroke engines are installed on chainsaws, trimmers, blowers. The advantages of these engines are their simple design, low weight, and minimal maintenance. Ethanol in gasoline, contaminated fuel, or poor fuel quality (low-grade gasoline and oil) can contaminate the carburetor and result in difficult starting or poor engine performance. Below are the steps that will help clean the carburetor of a chainsaw or the carburetor of any other two-stroke engine, if the need arises.

Chain lubrication system

Oil pumps have different constructions (piston or other diaphragm type) and are made of different materials (metal or otherwise plastic). They are driven by a gear train, which receives its professionalism from the drive sprocket. When the engine idles (drive sprocket does not rotate), there is no oil supply. pump performance depends on the number of revolutions of the drive sprocket, the higher they are, the more oil goes to the saw chain. Some oil pumps have a manual capacity adjustment mechanism. Through the adjusting screw (1).

clean, chainsaw, filter

How To Pressure & Vacuum Test A 2 Stroke Engine

Signs of chainsaw engine malfunction:

In certain situations it is best to call in a professional and take your saw to an authorized service center. But some malfunctions can be solved by yourself.


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

  • Presence of spark on the spark plug;
  • Fuel supply;
  • Condition of filters;
  • The operation of the breather valve built into the fuel cap of the stalling unit;
  • Functioning of the exhaust duct.

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

The first stage of the search for the reasons why the gasoline saw does not start, is to check the spark plug spark. There are many factors that affect the operation of this element. However, the main ones at the initial stage of tool defectology are:

  • Improper adjustment of the carburetor;
  • The presence of more oil in the gasoline than should be present;
  • Clogged air filter.

All of these contribute to fouling of the spark plug electrodes. In 50 times out of 100 the chain saw does not start in cold conditions because of the absence of spark because of the deposits of carbon on the electrodes and their corrosion. As a result, the gap is either narrowed or widened.

To check the spark is quite simple. This will require:

  • Remove the tip of the high-voltage wire;
  • Unscrew the spark plug;
  • Put the tip back on;
  • Leaning the spark plug with the skirt on the cylinder;
  • Produce start with a starter.

If there is good spark between the electrodes when the chainsaw engine is started, there is nothing wrong with the ignition assembly. If not, it is worth cleaning the element itself and check the clearance of the electrodes. If necessary, use a special stylus to adjust the distance between the contacts.

The distance between the electrodes can vary from manufacturer to manufacturer. Some may have 0.5 mm. Others have 0.2 mm. Therefore, carefully read the manufacturer’s recommendations.

There may be other reasons why sparkles are not on the spark plug. Among the main malfunctions that affect poor starting of the chainsaw and unstable engine operation at idle, from which the tool can stall, you can refer to the following:

clean, chainsaw, filter
  • The spark plug channel is overfilled with fuel;
  • Lack of contact between the high-voltage cradle and the spark plug tip;
  • Failure of the ignition unit.

HOW-TO Pressure & Vacuum Test On A Chainsaw. Leak Down Test

How to start a cold chainsaw, if the spark plug channel is constantly filled with gasoline? Eliminate the problem for the time of starting the tool, you can use the following algorithm:

  • Unscrew the spark plug with a special wrench;
  • Wipe it down with a clean and dry rag;
  • Allow to dry for 20 to 30 minutes;
  • Remove the soot with a file and adjust the gap between the electrodes;
  • Drain the remaining fuel from the spark plug duct and dry it;
  • Assemble everything and try to start the mechanism.
  • Dry spark plug. Apparently, no fuel mixture is getting into the cylinder. The problem is not in the spark plug, so screw it back on. And check the fuel system.
  • Wet, heavily stained with fuel plug. The reason for the fuel surplus is hidden in either a faulty start-up or a carburetor misfire.
  • Black carbon residue on the plug. This could indicate the use of bad oil (so use only original oil for your saw), an improperly regulated carburetor, or an improperly prepared fuel mixture. The spark plug should be washed and well cleaned of carbon deposits with an awl or a needle, the electrodes should be swabbed and reinserted.

Faults in the chain lubrication system

Every instruction manual tells you to check the condition of the chain lubrication system.

All chainsaws are similar in structure, whether they are European (Echo, STIHL, Husqvarna) or domestic (Cedar, Ural). The main elements are located inside the body. fuel tank and engine and outside. Starter, handle, chain saw (guide bar). A sharp jerk of cable starts the engine, and it’s a saw blade.

To begin with a video showing how the chainsaw is made and how it works:

From time to time malfunctions occur in the saw, the removal of which requires disassembly. What can happen to something as simple as a chainsaw? At least the following:

Most problems are either engine failures (fuel system, exhaust system, ignition, piston part of the cylinder) or failures of other systems and components (clutch, chain, tire, lubrication system). Let’s look at the most common malfunctions and how to fix them.

Faulty carburetor

If all of the above steps are unsuccessful, the cause of the chainsaw malfunction may be a faulty carburetor.

Chainsaw. It’s a simple device that can last a long time with proper care. In this case, the saw is a tool that is subjected to various stresses, and consequently there are still breakdowns. In this article you will learn what caused a particular problem and how to fix it.

Why should you clean a chainsaw carburetor?

When operating the unit, dust, small stones and other contaminants often get into its fuel tank. The fuel filter is responsible for catching them, but if you use the chain saw frequently, the filter will gradually become dirty. As a result, it loses the ability to perform its function.

This part can also be affected by oxidation, which is the deposition of oxides on the inside walls of the fuel tank. It happens if the chain saw has not been operated for a long time and there is fuel left in the tank. After that, the beginning of work leads to the entry of sediment into the carburetor, clogging it.

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