Chainsaw Partner 350 does not start and does not develop speed. Reasons why a chainsaw starts and stalls. How to prevent chainsaw damage
To the real owner do without a chainsaw? This is nonsense! Many small and not so small tasks will stop without this tool: cutting branches, pruning bushes, small carpentry repairs, etc. What can I say, you yourself know better how much it is needed.
AND popular chainsaw It is no coincidence that the partner is named so - she helps in the household just as well as her partner. And if this chainsaw breaks, it’s very difficult without it. Fortunately, you can try to repair the Partner chainsaw yourself. Let's see in what cases this is possible.
Chainsaw Partner 350: characteristics and features
Chainsaw Partner 350 belongs to the class of household or amateur hand-held gasoline saws. Amateur - does not mean a “club of interests” for chain saw lovers, but denotes the power and capabilities of the unit. This saw is one of the best in its class and is optimal for short-term work in the garden, on a summer cottage, etc.
With its help, you will trim bushes, prepare brushwood for the barbecue and wood for repairs, and cut down a small tree. All this is possible due to the following technical parameters:
- Weight: 4.7 kg
- Two-stroke engine power - 1.8 hp. (1300 W)
- Engine capacity: 34 cc.
- Electronic ignition system.
- The capacity of the oil tank is 0.2 l, the fuel tank is 0.4 l.
- Chain pitch: 3/8 inch.
- The maximum chain length is 41 cm, the optimal length is 35 cm.
- Primer for starting a cold engine.
Advantages of the Partner chainsaw 350 lies in its compact size and convenient operation. It has a built-in safety system: the double inertia brake is activated automatically as soon as an emergency situation occurs. potentially dangerous for the saw operator.
Chain lubrication is also carried out automatically. At the same time, fuel is consumed very economically, and the air filter lasts longer thanks to the CCS system. It’s even surprising that at such high engine speeds the saw operates relatively quietly. As a nice “bonus”, the cylinder walls are coated with a special protective compound, and an anti-vibration system is built into the handles.
Concerning disadvantages of a chainsaw Partner 350, then the reviews on the forums speak most eloquently about them. It turns out that this model was first released in 2012 and then re-released in 2015. According to the documents, the updated model is more advanced. But in practice, copies of the first series are more reliable and break less often. In addition, this saw is not equipped with a shock absorber - this can be felt during prolonged use.
Chainsaws Partner is produced by the Swedish concern Husqvarna, which is well known to users of equipment for gardening, dacha and forestry. Factories producing Partner equipment are located not only in China, but also in the USA, Italy, and Great Britain.
Despite this, Partner chainsaw price relatively low. Spare parts are also available. In Western countries, this brand is very popular due to its win-win combination of price and quality. But even Swedish quality sometimes fails.
Common Partner saw breakdowns: diagnostics at home
The Partner gasoline saw cannot be called unreliable. For many users it works without problems in winter and summer, for many years. But others complain about the same typical problems:
- The chainsaw won't start.
- The chainsaw starts but stalls.
- Fuel does not enter the cylinder.
All these have problems internal reasons in the parts and assemblies of the tool. This means that in order to get to the bottom of it and fix the breakdown, you will have to disassemble the electric saw. This is not as difficult as it may seem, because manufacturers always take this possibility into account.
For self-diagnosis problems at home, you need to understand that common chainsaw problems in the vast majority of cases are caused by the same reasons. Therefore, just by the symptoms, you can guess where the source of the problem is.
For example, if the chainsaw does not start, then the reason most likely lies in the ignition system, namely in the spark plug. If air leaks into the cylinder, then you need to look for a defect in the fuel system. A dirty filter causes the engine to stall and smoke, and so on. Let's look at these cases in detail so that you feel confident when repairing the Partner chainsaw yourself.
What to do if the Partner 350 chainsaw does not start
Now that you know what caused the breakdown, it's time to get down to business. A faulty ignition system can only be repaired after disassembly. To do this, remove any remaining fuel from the tank. Then carefully disconnect the wire and remove the spark plug (a special key is provided to remove it).
In addition, in any case, it doesn’t hurt to make sure that the chainsaw’s carburetor is adjusted correctly. Do not begin adjustments until you have cleaned the air and fuel filters. If the filters are ok, use the adjustment screws.
One of them (S) designed for idling, the other two are for maximum (H) and minimum (L) speeds, respectively. Gradually turn the screws clockwise. After stopping, make two turns in the opposite direction.
Problem: the chainsaw stalls after starting
Common situation: Partner chainsaw stalls at high speeds, although before that it starts and works without problems at medium gas. Sometimes at medium it also works intermittently - but at full throttle it immediately stalls. This problem is faced by many users who save on quality fuel.
Poor quality gasoline easily contaminates parts with soot. In this case, checking the filters (air and fuel) will not hurt. Moreover, the muffler suffers from poor fuel and the carbon deposits it creates.
The combustion products of dirty fuel simply clog it, forming an impassable plug of burning. This plug greatly reduces engine power. In this case, gasoline is consumed in large quantities, but there is no result in power. Check and clean the muffler:
- Remove any remaining fuel from the tank.
- Remove the muffler and take it apart.
- Do not leave the outlet open; cover it with a napkin or lid.
- Clean all carbon deposits from the muffler using a cable and/or detergent. According to reviews, “Mr. Muscle” for pipes or similar household chemicals has proven itself well.
- A cleanly washed muffler needs to be dried. To speed up the process, you can do this with a hair dryer.
Repairing the fuel system of a chainsaw
When the fuel supply is interrupted, then it is not surprising that the chainsaw does not work. Moreover, in this case there is only one problem: no fuel enters the cylinder. And there may be several reasons for this problem, and you have to find that very reason.
First, try disconnecting fuel hose and observe the fuel pressure. A weak, intermittent flow indicates a clogged filter. Take it out, rinse and dry it, and if possible, replace it with a new filter. Also clear the breather (valve) of any blockages.
Check the condition of the filter carburetor and, if necessary, thoroughly rinse it, dry it and reinstall it. We talked in detail about setting up the carburetor above, and these actions in this case will also not be superfluous.
If the reason is not in the breather and not in the carburetor, then everything may turn out to be banal. Make sure there is enough fuel in the tank.
Problems in the cylinder-piston group are also possible.(abbreviated as CPG) chainsaws Partner. This failure can be considered serious because the cylinder and piston are the basis of the engine. Therefore, the CPG is an expensive component, the cost of which reaches half the cost of the entire tool.
From the coordinated work of the cylinder and the piston directly affects the power of the chainsaw. During operation, especially if operating rules are not followed, the cylinder, piston and rings may wear out. In this case, only replacing parts will help.
CPG parts may be damaged mechanically. These defects can be diagnosed independently. Remove the muffler. You can see the CPG in the hole. Scratches and burrs on the cylinder surface, located chaotically, occur when debris, fragments, or solid foreign particles enter.
If the cylinder has darkened, and this defect is observed on its entire surface, then, in all likelihood, you filled the chainsaw with low-quality fuel. Bad gasoline also affects oil scraper rings.
A worn surface of the cylinder on the muffler side is a sign of critical overheating of the chainsaw during operation.
Minor mechanical damage can be corrected by replacing bearings, rings, etc. But in case of deep scuffing, the CPG will have to be completely replaced by contacting a partner chainsaw repair shop.
How to prevent chainsaw damage
Chainsaw repair in some cases it can be very expensive. This can be avoided if you pay enough attention to the prevention and control of the condition of the instrument and all its parts. Moreover, it is not difficult to fulfill this condition - just use the operating instructions and adhere to rational accuracy:
To keep it in working order, you just need to strictly follow the instructions and follow some general rules:
- Do not allow the engine to overheat, take breaks in operation so that it can rest and cool down.
- Do not load the chainsaw beyond the capabilities of its class. For example, if you are using a household grade Partner 350 saw, then it is simply not designed to work for more than 40 minutes a day.
- Check the chain brake daily (this is done at maximum acceleration).
- Follow the manufacturer's requirements regarding the quality and composition of the fuel mixture.
- Check the condition of the spark plug weekly and clean the electrodes if necessary.
- Before using the saw, make sure the chain is sharp and installed correctly. Pay attention to the wear of the cutting links and sharpen them in a timely manner. Watch for cracks and breaks in the rivets.
- A properly tensioned chain does not sag, but it can be moved by hand. Never do this with a hot chain! Sharpen and/or tighten it after replacement.
- When refueling the chainsaw, make sure that dirt and other foreign particles do not get into the tank along with the fuel. Fill oil and gasoline carefully, do not spill them.
Often, when contacting a service center, it turns out that the Partner chainsaw broke down due to improper starting of the tool. Therefore, there is only one universal solution when a saw breaks down: handle it correctly, and most problems can be avoided.
And if you are interested in the second popular brand together with Partner, then the next article is about exactly that.
And for those who like to know more, we suggest you watch the video about chainsaw repair Partner
Chainsaw Partner 350 is one of the most common gasoline saws. Very often, their owners ask questions about how to repair the Partner 350. After reading the article, you will learn the answers to questions about how to diagnose faults in the Partner, as well as how to fix them yourself.
Correct identification of a malfunction is already more than half of the repair. In case of malfunctions related to the fact that the saw does not start, the essence of the diagnosis is to check the spark and the presence of fuel in the cylinder, since in the chainsaw there is either nothing to burn or nothing to set on fire.
Spark test
To check the spark, you need to unscrew the spark plug, install it in the cap of the high-voltage wire and attach it to the cylinder (there should be ground on the spark plug). Next, pull the starter several times, while carefully looking at the spark plug. There will be no spark if the Partner 350 chainsaw has faults such as:
- defective spark plug (can only be eliminated by replacing it with a known good one);
- broken wires in the system;
- malfunction of the ignition control button;
- defective ignition coil;
- no gap between the coil and the flywheel;
- broken key between the crankshaft and the flywheel.
Checking the fuel
The first sign that the cylinder is not getting fuel is a dry spark plug. Having discovered a dry spark plug, the next thing you need to do to more accurately determine the malfunction is to try to run the Partner 350 chainsaw by pouring no more than 5 ml of gasoline into the cylinder, through the spark plug hole. If the chainsaw does not start after this, then most likely there is no compression in it or there is not enough compression to start the engine. Causes:
- CPG wear;
- thermal seizure of the cylinder or piston;
- scuffing due to foreign body entering the CPG.
If, after pouring gasoline under the spark plug, the saw starts, then the problem is in the carburetor or fuel line of the Partner 350. It is necessary to carry out a complete diagnosis of the fuel system.
Bearing diagnostics
When diagnosing a chainsaw, it is necessary to check the crankshaft bearings for play. To do this, you need to shake the flywheel up and down. If there is play, the bearings must be replaced.
Also be sure to check the crankshaft connecting rod play. To do this, you need to lock the piston in the upper position and gradually shake the flywheel from left to right, simulating its natural movement. If there is play, then the Partner 350 crankshaft must be replaced.
Tools
In order to disassemble Partner 350 you will need several specific tools:
- Clutch wrench (you can buy it or make it yourself from a socket of a suitable size).
- Piston stopper.
- Torx hex set.
- Soft metal drift.
Special key for clutch
Punch
For ease of disassembly, Partner 350 will need tweezers and a medical clamp. As for ordinary tools, you need to have screwdrivers or a cordless drill with a set of attachments, and a hammer.
Algorithm and description of the disassembly process
If you need to completely disassemble the Partner 350 chainsaw, the first thing to do when disassembling is to clean the saw using a compressor. Next, the chainsaw components are removed in the following order:
- chain brake cover and saw set;
- top cover;
- saw handle;
- starter.
After the first stage of disassembly is completed, we clean the chainsaw again using a compressor, since we already have access to the air ducts, which in most cases are heavily contaminated with wood dust.
At the next stage, it is convenient to remove the air filter housing and the Partner 350 carburetor.
After removing the carburetor, the inlet window of the cylinder must be plugged with a rag, this will prevent foreign objects from entering the engine crankcase.
The muffler can be removed either immediately after the carburetor is removed, or after the engine is removed. The outlet window is also covered with rags.
To do this, you will need to use a piston stopper by installing it in the spark plug hole.
The clutch on all Partner 350 chainsaws unscrews as the chain moves, this is done so that it does not unwind during operation. The flywheel nut has a standard thread and is unscrewed using a 13mm socket, counterclockwise.
After removing the clutch, the oil pump becomes accessible; it must also be removed.
The last step is to unscrew the engine screws and remove it from the housing.
Instructions for removing the flywheel from the crankshaft
To remove the flywheel, you will need to use a special puller, but most craftsmen use a drift made of soft metal, since with its help the removal process is significantly accelerated.
The bottom line is that the flywheel nut is unscrewed until it is level with the plane of the shaft, after which, using a hammer and a drift mounted on the nut, with one sharp blow, the flywheel is removed from the shaft.
The method is a little barbaric, but time-tested and recommended by many masters as the most practical and reliable.
Assembly Partner 350
In order to correctly assemble Partner 350, it is necessary to install all elements in the reverse order of removal.
If this is your first time repairing a Partner 350 chainsaw, then when disassembling, place the parts in the order in which they were removed. This will prevent you from getting confused and forgetting to install any node.
An important feature of the Partner 350 chainsaw engine assembly is that the crankcase cover is installed without a gasket. Instead, a red sealant is used, which is applied in a thin layer to the crankcase installation site. Before applying the sealant, it is necessary to degrease the crankcase cover and its installation location for better adhesion of the sealant.
Setting the flywheel and coil clearance (ignition adjustment)
During the assembly process of the Partner 350 chainsaw, if not only the flywheel, but also the ignition coil was removed, a gap must be set between them. To do this, first install the flywheel, then place a piece of a one and a half liter plastic bottle on it, and then place the coil and fix it with two fastening screws, while the flywheel must be turned toward the coil with magnetic contacts.
After adjusting the clearance, rotate the flywheel. If it does not touch the coil contacts, then the gap is set correctly.
Replacing the piston group
If it is necessary to replace the cylinder and piston of the Partner 350 chainsaw, it must be disassembled according to the algorithm described above. The piston is secured at the top of the crankshaft connecting rod using a piston pin. A separator with roller bearings is installed between the pin and the connecting rod.
To replace the piston and cylinder, it is necessary to remove the piston from the cylinder and remove it from the crankshaft; to do this, remove the piston pin stopper from one side of the piston using pliers and a small screwdriver.
Then it is squeezed out from the opposite side using a small screwdriver. If the pin comes out tightly, you can slowly knock it out using a hammer and a drift, suitable in size, but smaller than the diameter of the piston pin mounting hole.
The new piston is installed on the crankshaft so that the arrow on the piston cap points in the direction of chain movement.
To check the correct installation, you need to take the crankshaft with the piston installed on it so that the shaft on which the flywheel is installed is in your left hand, with the arrow facing away from you.
After the new piston is mounted on the crankshaft, a ring is installed on it, after which the piston is inserted into the cylinder, while the parts should be lubricated with engine oil, which will prevent the ring from breaking and make the process easier. Next, the crankcase is installed.
Service center technicians use an algorithm for replacing the piston group, which allows you to carry out work without completely disassembling the Partner 350 chainsaw. How such a replacement occurs can be seen in the video.
Where is the breather located
The Partner 350 chainsaw, like other chainsaws, has two breathers. One is responsible for equalizing the pressure in the oil tank, the second - in the fuel tank. The oil tank breather is installed next to its cover, and a special disposable metal plug is installed on top of the breather to allow air to pass through.
The fuel tank breather Partner 350 is located in the area where the carburetor is installed, like the previous one, it is closed with a plug.
Tip: Breathers must be replaced when a vacuum is created in the tanks and the supply of fuel and oil stops.
Oil pump repair and drive sprocket replacement
Repair of the oil pump on the Partner 350 chainsaw is necessary if the oil supply has completely or partially stopped. The oil pump mechanism includes the pump itself and a gear with a worm gear, which is driven by a sprocket connected to the clutch.
The most common problem with an oil pump is missing threads and splines on the gear or splines on the worm gear. The situation can be corrected by replacing the parts with new ones.
To remove the oil pump on the Partner 350, you need to remove the side cover and the chainsaw tire, then lock the piston and use a special wrench or a homemade wrench from the 24mm socket to unscrew the clutch.
The clutch has a high tension torque, so you need to use a wrench and turn it strictly clockwise. Do not try to unscrew the clutch with a hammer and chisel, this often leads to breakdown of the mechanism and also has a bad effect on the condition of the crankshaft bearings.
To replace the Partner 350 drive sprocket, you simply need to unscrew the clutch, remove the old part and install a new one. The sprocket is mounted on the shaft through a needle bearing. When replacing the sprocket, it must be checked for defects and lubricated. For lubrication, you can use regular Litol or any other that can withstand high speeds.
The process of replacing the drive sprocket is shown in the video, after watching which you can easily repeat what you saw on your chainsaw.
Troubleshooting common problems
The Partner 350 has popular faults that owners of these saws can diagnose and fix themselves. Let's take a closer look at popular faults and how to repair them yourself.
Stalls when you press the gas
If the Partner 350 stalls when you press the gas, then most likely there is a problem with the fuel system. The most common breakdown is an incorrectly adjusted carburetor or its malfunction, as well as extraneous air leaks.
Tip: If the chainsaw stalls when the speed increases, you should not immediately adjust the carburetor. Start by checking the engine for foreign air leaks. One of the signs of air leaks is increased idle speed.
Starts and stalls
If the Partner 350 starts up and immediately stalls, then, as in the previous case, there may be several reasons, but the most common is a difficult fuel supply. You should start troubleshooting by checking the condition of the fuel filter and lines. If the fuel flows normally, then check the spark and try to start the chainsaw on a new spark plug, since the saw may stall due to interruptions in sparking.
It is also necessary to check the draft of the air damper. If it does not open the air damper or does not open it completely, the engine may stall due to excessive fuel enrichment.
Lack of chain lubrication
There are several reasons for the lack of lubrication supply on the Partner 350 chainsaw, and in this case we can list them all.
- Oil line rupture.
- Oil filter clogged.
- Defective worm drive gears.
- Line or pump clogged.
How to solve oil pump problems is described above.
Pouring a candle
A very common problem that owners of Partner 350 have to face. The first place to start checking is to replace the spark plug with a known good one. If it doesn’t help, the spark is good, but the engine floods, then the reason is hidden in the carburetor settings. Diagnostic instructions are available on our website.
Conclusion
The Partner 350 is not a bad household chainsaw, which is quite possible to repair yourself. For proper repair, you need to know the algorithm by which disassembly occurs. Have the necessary tools and understand how this chainsaw works. If you are not confident in your abilities, we advise you to contact the service center.
If your Partner chainsaw does not start, there is no need to rush to take it in for repairs. Each tool comes with instructions that indicate how to fix the problem yourself.
Why it won’t start and what to do
There may be several reasons why a chainsaw starts poorly or does not start. To install them, you need to diagnose the device. Possible causes of problematic startup:
- there is no spark at the spark plug;
- poor condition of the air and fuel filter;
- poor fuel supply and exhaust channel performance;
- The breather, which is located on top of the tank, does not function well.
Often carbon deposits appear on the electrodes of the spark plug and the tool does not start. Therefore, first check the spark plug. If the reason is not hidden in it, then the remaining elements are examined.
- To test the ignition spark, you need to remove the spark plug. To do this, remove the tip located on the high-voltage wire, take out the spark plug and put the tip back on. The spark plug is applied to the cylinder and the starter is started. The engine ignition unit is working properly if the electrodes produce a spark when turned on. When there is no spark, you need to use a feeler gauge to adjust the distance between the electrodes or clean the entire part. For the chain saw to start, the distance between the electrodes must be from 0.2 to 0.5 mm.
- To check the fuel supply, you need to fill the tank with a fuel mixture. The system pipe is disconnected from the carburetor and pumped up. Fuel flows in spurts when the system is working properly. If the supply is weak, clean the channel through which the fuel or filter is supplied. When gasoline leaks appear under the tank cap, this means that the tank is full and can affect engine performance.
- The fuel filter is checked by disconnecting it from the carburetor. The gasoline supply channel is disconnected and fuel is pumped. If there is no pressure in the pipe, then drain the fuel from the tank and pull out the filter cartridge. It is cleaned or replaced with a new one.
- The breather valve (valve), located on the fuel tank cap, is designed to equalize the air pressure, which allows gasoline to flow freely into the carburetor. Sometimes it becomes dirty, air does not flow inside and a vacuum is created, which does not allow the chainsaw to start. The hose through which fuel is supplied is disconnected from the carburetor and then checked. Fuel should flow out of the disconnected hose. If this does not happen, then clean it with a simple needle or a stream of air under high pressure.
If it starts and stalls
When a chainsaw starts and stalls, it is due to the carburetor or other parts. Causes of malfunction:
- Fuel is not getting to the engine well. This occurs due to a clogged breather.
- There is not enough fuel in the tank. By tilting the tool sideways, the remaining fuel flows into one place. Because of this, the saw stops working.
- Fuel is of poor quality.
- The spark plug insulator overheats when poor contact is made between the wire cap and the spark plugs. The contact between them becomes worse due to carbon deposits or mechanical shear.
- Spark plugs are faulty.
- Fuel does not flow well to the carburetor through the fuel filter or pump. As soon as the tool starts to increase speed, it immediately stalls.
- If the air filter is dirty, the engine cannot withstand high loads and stops.
- Insufficient or no lubrication in the chain.
Stalls when you press the gas
If the chainsaw stalls when you press the gas, then you need to inspect the gasoline and air filters, as well as the fuel pump.
- During operation, the air filter becomes severely clogged, and when you press the gas, the tool stops working. The filter is dismantled, cleaned or washed with warm water, dried thoroughly and only then installed back. Then disconnect the fuel hose screwed to the carburetor. Gasoline should flow out through it. The hose is cleaned or replaced with a new one if the liquid does not leak out. The filter is working properly and you don’t need to check it if the gasoline flows well.
- The chainsaw stalls - the gasoline pump may have worn out. If gasoline flows through the walls of the pump, it means that the device has stalled because of it. This part is replaced with another.
In order for the chainsaw to start, you need to accurately determine the cause of its malfunction, and then try to fix it yourself. If the problem is not found or you cannot fix it yourself, then it is better to seek help from specialists.
There are often cases when owners of chainsaws are faced with their breakdown and it does not matter at all what model of this type of equipment, since the nature of the breakdowns is almost the same for all. Well, the chainsaw has stalled, so what next? Undoubtedly, you can take the equipment to specialized services that will repair your “iron friend” for a fee. But as they say: why pay more?
After all, you can personally disassemble the instrument and repair it, since the damage may be insignificant, but in the service you will pay a lot for this. But naturally, in order to bring a tool back to life yourself, you need to be able to understand the reasons for its breakdown and how to troubleshoot it. So let's learn! In this article you can find answers to questions regarding situations when the tool simply stalls after directly pressing the gas. So let's get started.
Basic elements of chainsaws
Before we begin to delve into the issues of tool breakdowns and repairs, let’s first figure out what the chainsaw itself consists of. First of all, I would like to note that this tool belongs to the category of equipment whose operation directly depends on the internal combustion engine.
It is also important that chainsaws are equipped with a single cylinder engine, and which operates on a type of fuel such as gasoline. It is worth noting that, despite its similarity with other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain transmission, through which the chain (saw) itself moves.
In fact, a chainsaw is a fairly simple design, but this does not prevent it from being reliable, practical and capable of fully ensuring immediate uninterrupted and cyclic operation even in quite difficult conditions. This tool consists of a huge range of certain elements “vital” for its correct and productive operation. This is a carburetor, a direct chain tensioner, a tire equipped with a chain and other elements.
Characteristics and possible causes of failure. Fixing the problem yourself
Chainsaws are fairly reliable and simple designs. Therefore, if you properly care for them and handle them based on the manufacturer’s recommendations, then they fail very rarely and various types of breakdowns are quickly eliminated. But if you are faced with this situation and want to repair your instrument yourself, without resorting to the help of professionals, then delve into the information presented below.
In fact, it is impossible to clearly and accurately determine the reason why or stalls when you press the gas, since there are quite a lot of factors influencing this. But do not forget that starting from the fact that the chainsaw is equipped with a simple two-stroke engine, such conditions as lubrication, fuel, spark and air are important for its effective performance.
Consequently, the carburetor directly prepares the fuel-air mixture, the filter cleans the air from dust, the ignition unit and spark plug create a spark, and the gasoline contains lubricant.
- An important fact is that for trouble-free operation of the tool it is necessary to pay close attention to the fuel itself. Since if this kind of mixture is not prepared correctly, then most chainsaws simply will not start. Consequently, not every owner will think to look for the cause of the breakdown in the fuel. That is why, in order for your tool to always work correctly, you need to use only high-quality gasoline for the mixture.
And also use only the oil that is made by the manufacturer of your tool. In addition, it is important to prepare this kind of mixture in the quantity that you will definitely use in one or two weeks, but no more (see).
Because otherwise, overexposure of the mixture directly in the canister will lead to it losing all its octane properties and this will lead to significant problems with the instrument.
- The cause of the breakdown may also be a direct pouring the mixture into the candle at the moment when the mechanism is started. In order to solve this problem, you need to turn out and dry the candle, but remember that it should not be heated under any circumstances. Excess fuel must be drained through the hole (spark plug), wait 20-30 minutes, then put it back in place and try to start the tool again.
- The chainsaw stalls when you press the gas because no spark. This can happen when there is no good contact between the tip of the spark plug and the wire (high voltage). However, if this kind of connection works correctly, but there is still no spark, then the ignition unit (electronic) is the cause. It is important to note that these types of spare parts cannot be repaired, so they can only be replaced.
Do not forget that by examining the spark plug you can obtain significant information regarding the breakdown of the chainsaw. Since if its surface is dry, then the reason for this is the cylinder, into which fuel is not directly supplied. That is why you will have to check the entire range of its supply step by step. If the spark plug is covered in black soot, this means that the carburetor is not working properly, that is, it supplies either a lot of fuel or pours oil directly into gasoline.
- If the chainsaw stalls when adding gas, this means that fuel is supplied in insufficient quantities for full operation of the chainsaw. The reason for this may be either a clogged carburetor (its jet) or contamination of the filter itself (fuel). Remember that the first unit should be checked exclusively by professionals, but you can clean the second one yourself.
- In addition, the cause of failure may be filter (air) if it is contaminated with dust. But do not forget that each model has its own easily eliminated and characteristic features. It is for this reason that do not hastily start disassembling and repairing the instrument, but it is best to “walk” through the forums, where there are a huge number of reviews from various owners, so as not to make things worse.
Since, for example, a chainsaw stalls when you press the gas for a simple reason, namely a simple blockage of the direct breather.
In order to solve this kind of problem, all you have to do is disconnect the (fuel) hose from the carburetor and pay attention to whether fuel is leaking out of it. Since if the mixture flows in a full stream, this means that the breather is not contaminated, but if on the contrary, then the cause of the breakdown has been found.
- Here is another reason why a chainsaw stalls when you press the gas - muffler. It is this part that can interfere with the full operation of the tool in cases where it is directly contaminated with exhaust resinous deposits. To do this, you just simply need to clean it.
- Quite often the chainsaw partner stalls when pressed and the reason for this is cylinder-piston group. Since by examining them, namely the piston and cylinder, you can easily determine the cause of the tool malfunction by directly replacing them. You can also directly bore the cylinder itself relative to the dimensions of the new piston.
But if after inspection you find that there is no damage on both the piston and the cylinder, then the reason may lie directly in the rings (piston). To do this kind of check, you need to insert a piston into the cylinder and carefully begin to rock it using a connecting rod. If you suddenly feel play, then the rings need to be replaced, as they are already worn out.
- Many people wonder: why does the chainsaw stall when I press the gas? The answer may also lie in insufficient chain lubrication(see), since the oil line may leak, or the immediate channels may simply be clogged. That is why pay attention to the chain, because if it is dry, then without delay, start cleaning the channels that supply oil directly to the tool tire. Then inspect in detail the parts where the oil pump fittings are connected to the pipes. But if you notice that oil is leaking at the joints, or you find cracks in the tubes themselves, then in the first case, seal the leaks with sealant, and the tubes will have to be replaced.
First of all, what you should remember when purchasing this kind of tool is that certain parts of the saw need to be replaced with new ones after their service life (passport) has expired. It is for this reason that the instructions should always be at your fingertips, since everything is described there in detail.
These types of details include: sprocket (drive), tire, part of the system (anti-vibration), as well as a chain. Since we should not forget that if this “filling” is not replaced with a new one at the required time, then these worn-out spare parts will negatively affect the remaining parts of the chainsaw. It is for this reason that you should check the depth of the immediate tooth cutting quite often. Remember that it should not be higher than 0.5 mm a week.
To sum it up...
Definitely, every item we buy has its own expiration date and sooner or later it breaks, and it becomes a shame when the degree of its breakdown is so great that it cannot be repaired. But you must admit that quite often we simply treat technology negligently (see about proper operation and that), and when it stops working, then we try to find ways to fix the breakdown, turning to a huge number of services.
But remember that even though the equipment breaks down, we can extend its “life”. All you need to do is simply take care of it, run it in after replacing parts (read how it happens here) and keep its parts clean and in order. And then, undoubtedly, it will serve for many more years. It is also important to use exclusively high-quality spare parts and “additives” (see). Then your equipment will work smoothly, and you will simply forget what repairs are.
If the chainsaw starts up poorly and stalls, the performance of the simplest sawing work is out of the question. Not only budget-class instruments are susceptible to spontaneous failures, but also quite prestigious models from leading manufacturers.
- poor quality of components and entire units;
- unskilled care;
- use of low-quality fuel and oil substitutes;
- illiterate operation.
The distance from service departments and the high cost of the repair services provided force owners of failed tools to restore their functionality on their own.
This option is only possible after the warranty period has expired. The difficulty lies in the fact that traces of dismantling of individual components and assemblies noticed by service specialists may be the reason for refusing free repairs of more complex and expensive parts.
Benefits of DIY repairs
Experts offer several search options - the reasons for poor engine starting or if the power unit stalls during operation. The recommendations are equally valid for household and professional-grade chainsaws.
Owners with experience in operating chainsaw equipment use simple, time-tested, intuitive troubleshooting algorithms, which allows them to quickly eliminate many failures and breakdowns directly during operation.
The success of the work is facilitated by knowledge of the design of the tool and the interaction of all its components, the presence of plumbing and repair skills and operational experience. These same abilities allow owners to use their chainsaw equipment with high efficiency.
Self-repair provides the opportunity to significantly save material resources and reduce forced downtime.
Determining the nature of the malfunction
The majority of failures of chainsaws of any class occur in fuel equipment. For the ignition system this figure is an order of magnitude less. Stopping a chainsaw due to mechanical faults in the practice of household and professional sawing is even less common.
Electrical equipment
Malfunctions of the ignition system are determined quite simply by checking the spark plug for a spark and adjusting the gap in the contacts. After checking the integrity of the wiring, the causes of the failure should be sought in the operation of the electronic unit.
The absence of a spark at the contacts may be a consequence of a breakdown of the noise suppression resistor located in the body of the spark plug. To check its integrity, simply connect the high-voltage wire to the spark plug directly.
Mechanical problems
A sudden stop of the chainsaw can be caused by jamming of the piston in the cylinder or destruction of the crankshaft bearing due to oil starvation or poor quality.
In the first case, the functionality of the tool can be restored by pouring a few drops of engine oil into the spark plug hole. Elimination of damage to the crank mechanism requires complete disassembly in a well-equipped workshop.
Elimination of fuel equipment failures
A simple analysis of failures and malfunctions shows that most of them are due to unqualified tuning of the fuel system. Upon closer examination, it turns out that the reasons for the situation when the engine does not start, does not pick up speed and stalls are practically the same.
In most cases this is:
- air leakage due to loosening of screw fasteners or destruction of the crankshaft oil seal;
- contamination of jets;
- float valve leakage;
- Worn booster pump seal.
Signs of characteristic failures
If the saw engine does not pick up speed and stalls, does not develop power and stalls under load, there is most likely a lack of fuel or incorrect carburetor adjustment.
The list of possible causes includes contamination of the fuel filter or air intake filter element, too rich or lean gasoline-air mixture.
Signs of the engine running on a rich mixture:
- slow increase in speed;
- smoking from the muffler;
- reduction in traction characteristics and excessive fuel consumption.
The chainsaw stalls when you press the gas - most likely the mixture is too lean.
A simple way to determine the quality of the mixture
The easiest and most affordable way to check the quality of the mixture is the central spark plug insulator. A brown color of any intensity indicates proper carburetor adjustment.
The consequence of working with a rich mixture is the formation of black soot on the insulator, while a lean mixture manifests itself as a pure white or light gray insulator.
If, after normal starting and warming up, a saw filled with fuel periodically stalls during operation, it is recommended to eliminate the vacuum in the gas tank by cleaning the breather. The cause of unstable engine operation may be condensate water that has entered the carburetor float chamber.
Turning off the engine in operating mode
Alternatively, if the chainsaw heats up and stalls, troubleshooting should be done in the carburetor settings or in the high-voltage circuit of the ignition system unit.
When it overheats, the spark disappears or becomes so weak that its power is not enough to fully ignite the fuel-air mixture.
The engine also stalls when hot if the anti-interference resistance, which is located in the tip of the spark plug, is faulty.
Engine stalls when idling
The malfunction manifests itself as unstable operation in operating mode and stalls at idle. The reason for this phenomenon is most likely due to air leaks between the carburetor and the suction pipe of the cylinder. The failure is eliminated by tightening the screw fasteners.
The chainsaw engine turns off after reaching maximum speed
The power unit stalls at high speeds due to the performance characteristics of the electronic unit not meeting the stated requirements. Failure is more typical for budget chainsaws made in China.
The reason for refusal may be:
- lack of fuel mixture in the float chamber due to valve sticking;
- clogging of the fuel filter or the breather located in the fuel tank cap.
The power unit also stalls at high speeds due to a dirty air intake filter. The same symptoms are typical for a situation where the chainsaw started up in standard mode and stalled during the warm-up stage.
Setting up the fuel system
Qualified allows you to bring the power unit to a combination of maximum traction parameters and economical fuel consumption.
The success of the work is facilitated by preliminary cleaning of the air intake filter, warming up the engine to operating temperature, and performing adjustments in the sequence specified in the instructions.
The result of correct carburetor adjustment is:
- rapid acceleration without the “failure” characteristic of a lean mixture when accelerating sharply;
- absence of increased smoke from the muffler;
- stable idle speed.
Non-standard failures
If a normally operating chainsaw engine stalls when the tool is tilted to one side, you should open the gas tank cap and eliminate the freezing of the flexible fuel receiver.
Almost the entire range of Chinese chainsaws is, to a greater or lesser extent, copied from popular models of European origin, so the design differences are minor. The recommendations given can be used if a Chinese chainsaw fails.
The maintainability of Chinese chainsaw equipment has been increased due to the unification of the repair stock and the interchangeability of many components and parts with similar models.
