Almost every summer resident and villager today has a chainsaw. This tool is in high demand, as it can be used to solve many problems. But if the saw breaks down, it will be easy to repair it yourself, but in some cases it takes a long time.
Chainsaw design features
The farm usually uses semi-professional or household saws that can solve the problems of a small front of work. They all share almost the same design, such as an air-cooled, single-cylinder two-stroke carbureted engine.
It is the carburetor that will determine the stability of work, because it is responsible for preparing the fuel-air mixture. Air enters the engine, which must be free of contaminants such as dust. Otherwise, the piston groupwill fall into disrepair pretty quickly. In order to avoid such problems, the air filter must be cleaned from time to time. In addition, the manufacturer provides for this air pre-cleaning mechanism.
Chainsaw malfunctions can be expressed in different ways. In some cases, the engine will not start, while in others it can be started, but it immediately stalls. It may run erratically or idle normally while losing power when under load. Sometimes it also happens that, when putting a load on the chainsaw, you encounter the problem that it stalls. All this may indicate a failure in the ignition system.
The market today offers many models of chainsaws, below are examples of faults and solutions for individual brands of such equipment.
Preparing repair tools
There are a lot of chainsaw malfunctions, but repairs usually require a certain set of tools, among them should be highlighted:
- candle removal key;
- keys of different sizes;
- screwdrivers of various shapes and sizes.
You will also need a saw pattern.
There are some symptoms that indicate a malfunction of the unit. For example, if the problem is in the engine, it will manifest itself in the impossibility of starting it or turning it off after a short operation. You may notice smoke, overheating, and erratic operation. During the working stroke, the saw may lose power. All other signs usually indicate a breakdown of othersystems.
Repair of the ignition system of the Partner 350 chainsaw
If you need to check the system, you should start by inspecting the spark plug. If it turned out to be dry, this will indicate that the fuel mixture does not enter the cylinder. The ignition is completely irrelevant.
If you have a Partner 350 chainsaw, malfunctions and their elimination for this model will be described below.
So, if the candle is filled with excess fuel mixture, then the start was carried out incorrectly, in some cases this is indicated by incorrect adjustment of the carburetor. To fix the problem, the spark plug must be wiped, the fuel supply shut off and its residues removed. The chamber is then ventilated, only after that you can start the starter. The candle is installed in place, then the engine can be started again.
A fairly popular equipment option is the Partner 350 chainsaw. Troubleshooting for this unit is described in this section. For example, if black soot was seen on a candle, this indicates the use of low-quality oil. Another reason for such a malfunction is expressed in violation of the percentage of gasoline and oil in the fuel mixture. An incorrectly adjusted carburetor may be the culprit. In order to solve the problem, the candle must be washed, rid of carbon deposits with a needle or a sharp awl, and then sand the electrodes. Then the candle is returned to its place. When checking it, pay attention to the gap betweenelectrodes. It should make a limit of 0.5 to 0.65mm.
If the gasket in the spark plug is damaged or worn, this may cause problems with starting the engine. The spark plug should also be checked for sparks. To do this, you need to bring the ignition cable to it. The candle is clamped with pliers with insulated handles, and the candle is applied to the cylinder with a nut or thread. When you pull the starter cable, you can check if there is a spark. If not, the spark plug must be replaced. When a new spark plug does not produce a spark, the problem may lie in the high-voltage wire.
Husqvarna chainsaw fuel system problems
One of the common problems with a Husqvarna chainsaw is that the fuel does not enter the cylinder. This happens for one of several reasons. The first is the contamination of the fuel filter. In order to fix this problem, you need to remove the fuel hose and look at how the fuel flows. If the jet is rather weak, the filter must be cleaned. It is taken out through the hole for filling the fuel. If heavily soiled, the filter must be replaced.
The above-described malfunction of the Husqvarna chainsaw can also be caused by clogging of the breather. It is a hole in the lid of the tank. The hose to solve the problem is removed, which allows you to clear the blockage with a needle. Fuel does not enter the cylinder also for the reason that it is not enough or it has run out. The reason may lie in a clogged filter. into the carburetorsimply does not get air in the right amount, the fuel mixture is too rich, which prevents the normal functioning of the engine.
In order to solve the problem, the filter must be removed, washed and dried. After that, it is installed in place. Chainsaw carburetor malfunctions can also cause fuel not to enter the cylinder. This node is one of the main ones for the engine, so it is better to entrust the adjustment to a professional. When tuning is carried out by yourself, the engine may be completely disabled.
Dismantling and cleaning the muffler of the Ural chainsaw
If the engine runs normally at idle, but simply stalls when the load is increased, the muffler may be the cause. The products of combustion of fuel enter the spark arrester, which prevents exhaust. To eliminate this malfunction, the muffler of the Ural chainsaw must be removed and cleaned of soot. Detergent may be used for this.
The muffler is dried, and in the process, the hole in the engine is plugged with a clean rag. The muffler may be clogged due to excess oil in the fuel mixture. Sometimes it happens that the oil is of poor quality or simply not suitable for two-stroke engines.
Checking the performance of the Stihl chainsaw cylinder
During the operation of the device, you may notice that the engine does not work at full poweror will not start due to insufficient cylinder pressure. Cylinder wear may be the cause. The piston wears out quite often, the piston rings sink, and the crankshaft bearings become unusable.
You can check the condition of the cylinder-piston group by removing the muffler. You must look into the hole. The view will be limited, but you will have an idea of the state of the cylinder. This will allow you to understand what the problem is with the Stihl chainsaw, as well as determine the state of the cylinder. For a more accurate understanding, a compression gauge must be installed in the candle hole. Manually turn the starter. You can use an electric drill. Within 9 atmospheres, the pressure of the working saw should be. If this parameter is lower, the power should decrease.
By disassembling the engine completely, you can get an accurate picture. The crankcase for this is disconnected from the cylinder, which allows you to inspect the piston. If deep scratches or chips were noticed on it, the piston changes. A worn piston ring may indicate low compression. It should not be covered with soot if it is in working order. Its position should be free inside, it should be tightly pressed from above.
Repair of the Partner chainsaw chain lubrication system
The chainsaw may not work properly even if the lubrication system is faulty. The reasons for this may be:
- cracks on the pump casing;
- insufficient oil supply;
- violationthe tightness of the connection between the fitting and the tube.
So, one of the malfunctions of the Partner chainsaw, as mentioned above, is that oil can leak. To fix the problem, make sure that the connection between the tube and the pump fitting is tight. They should not have cracks. If you find defects, the tube must be replaced or the error repaired with sealant.
Sometimes there is not enough oil. This is indicated by the clogging of the channels. In this case, they are well cleaned. The reason here lies in the fact that when clogged, the lubricant is supplied in small quantities. But if you notice cracks on the oil pump housing, then it should be changed.
Problems with the asterisk on the Partner saw
A chainsaw malfunction can be expressed as a chain jamming or sprocket wear. To fix the problem, you should open and revise the entire clutch assembly. In the process of this, you should check if there are any deviations from the size of the teeth from normal values, this parameter should not exceed 0.5 mm. Otherwise, the saw will run with excessive vibration, which will cause premature failure of the entire tool or crankshaft bearings.
The working resource of the sprocket is usually 2 times longer than the life of the chain on the Partner chainsaw. Malfunctions and their elimination, however, can happen much earlier. In practice, it is best to use about two chains until their cutting edges are completelyfrayed. After that, you can purchase a new kit and replace the sprocket.
To carry out work, remove the air filter and remove the spark plug to gain access to the engine cylinder. The shaft rotates clockwise, the piston of the cylinder rises to a vertical position. Then it should be taken back a few millimeters. Above the piston, the inner space of the cylinder is filled with a dense cord for fixation. Once the crankshaft is secured, the puller must be inserted into the hole in the coupling and rotated until completely dismantled.
Behind the clutch will be an asterisk and a needle bearing, which is responsible for smooth rotation. When wear is detected, it is replaced with a new one. Then you can do the installation of all the parts, acting in reverse order. To install the clutch, you will have to fix the piston, but this must be done with the left rotation of the crankshaft a few millimeters to the top point. The work must be done carefully to avoid breakage of individual parts of the mechanism.
Working with chain brake failure
The saw may also refuse to work due to a malfunction of the chain brake. Sometimes this leads to clogging of the space under the cover. The chain brake also fails due to the wear of the brake band. If you are faced with the first option for a chainsaw malfunction, the elimination should be to clear the blockage.
The second case involves replacing the tape. During operation, parts wear out to varying degrees. In order to savethe tool is in working order, from time to time it is necessary to change parts, among which the most common are:
- chain;
- leading sprocket;
- anti-vibration unit;
- tire.
How to avoid breakdowns
In order not to prematurely repair chainsaw malfunctions, it is necessary to operate it correctly. One of the basic rules to follow is the correct start-up of the equipment. Before each use, make sure that the circuit is in good condition. The teeth must be well sharpened, the chain must be taut. It shouldn't sag. You can check the correct tension by pulling the chain slightly away from the blade.
Sharpening of the chain is carried out on a special machine or with a file with a special template. It all depends on what chain tooth pitch your saw has. In order not to look for the causes of chainsaw malfunctions ahead of time, it is necessary to clean after each use. This applies not only to the housing and cooling fins, but also to the air filter, bar and chain. After using the saw, the tire must be turned over so that it wears evenly. The sprocket should be lubricated if there are grooves in the front of the device.
Incorrect storage can lead to chainsaw malfunctions. If you do not plan to use the machine for a long time, drain the oil and fuel. The bar and chain form an electrochemical pair, so they rust together and must therefore be stored separately.
In conclusion
If you area summer resident who only grows fruits and vegetables in his backyard, you may wonder why a chainsaw is needed for a person like you. It remains open until you are faced with the task of building a bathhouse, felling an old tree, or renovating a greenhouse. You can’t do without a chainsaw if you want to make a bench for relaxing. But no matter how modern and high-quality such equipment is, from time to time it will need repairs, which you can do yourself.
