Why the Partner chainsaw won’t start

Chainsaw outlet check.

One of the reasons that a chainsaw does not start well may be a clogged exhaust channel or its muffler. At the same time, a drop in power is noted in the process of sawing sawn timber and logs. This is most often due to resinous deposits on the spark arrestor or muffler channel, which are formed during the combustion of a poor-quality mixture of gasoline and oil, which impede the removal of exhaust gases.

partner, chainsaw, start

Resonator clogged with carbon deposits can cause poor starting of the gasoline saw.

Eliminate the reason for the poor start of the chainsaw, in this case, you can remove the accumulated combustion products. To do this, perform a number of manipulations:

  • Remove the muffler by unscrewing the screws;
  • Remove the cooling panel and gasket;
  • Remove the spark arrestor;
  • Disassemble the resonator housing;
  • Wash all elements from carbon deposits with a detergent;
  • Let them dry completely;
  • Collect everything in reverse order;

To prevent dust and sand from entering the cylinder when cleaning the muffler, cover the outlet of the chainsaw engine with a clean rag.

Repair of the carburetor of the Partner 351 chainsaw (main malfunctions, their elimination)

Even a very careful and correct adjustment of the carburetor may not solve some of its malfunctions and the problems caused by them in the operation of the Partner 351 chain saw. If the adjustment fails to restore the normal performance of the internal combustion engine power unit, it must be dismantled, disassembled and repaired.

In some cases, interruptions in the operation of the carburetor are associated with clogged jets, fuel and air filters and, as a result, “underfilling” of fuel. The main symptoms of this problem are loss of power and unstable engine operation. Dust, small debris and even water droplets can become the reason, and the water frozen in the carburetor completely blocks the fuel supply channels.

In the presence of a compressor, all channels of the carburetor are purged with compressed air, and if the procedure did not help, they wash it in an ultrasonic bath (jewelry or for washing optics are suitable) using a special carburetor fluid. During the cleaning process, it is forbidden to use metal needles, wire, fluffy or “loose” fabric.

Along with the “underfilling” of fuel, its “overflow” is also considered a malfunction.

There are often cases when the chainsaw begins to work unstably due to a leakage, which is formed due to a bursting spacer between the carburetor and the chainsaw engine (pictured below). The only way to solve the problem is to replace it with a good one.

Adapter between the engine and the carburetor of the Partner 351 chainsaw

Reasons why the Partner (Partner) chainsaw won’t start and how to fix them

If the Partner chainsaw does not start, there is no need to rush to take it for repair. Each tool is accompanied by an instruction, which indicates how to fix the malfunction with your own hands.

Overheat

Overheating of the engine during operation can cause the saw to stall and not start. Overheating is quite dangerous, as it can cause the piston to melt in the cylinder and the engine to jam. At the first cases of overheating, it is worth diagnosing the tool for the presence of extraneous air suction into the engine, and adjusting the carburetor.

Air leaks, as well as incorrect carburetor adjustment, affect the maximum number of engine revolutions and its lubrication, which in turn causes overheating and wedging of the tool.

Partner 351 chainsaw carburetor. from device to adjustment

For a durable and trouble-free operation, the Partner 351 chainsaw requires periodic inspection and maintenance. Among its modules, which can be adjusted independently, the carburetor is of paramount importance: the correct setting of this unit is necessary for the effective functioning of the entire mechanism. This article will help you understand its purpose, structure and maintenance.

Broken fuel line

During the operation of the chainsaw, vibration occurs, which can cause damage or breakage of the fuel line of the chainsaw. In this case, the chainsaw will stall and it will be impossible to start. To diagnose a malfunction, you need to conduct an inspection and determine the presence of fuel leaks.

Finding reasons why the chainsaw won’t start

Amateur and professional chainsaws are complex devices. The service life of their two-stroke engines, components and assemblies has its own limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when the chainsaw does not start or stalls is not very pleasant and sometimes confuses the user. How to identify and correct a malfunction by returning the instrument to work.

What to do if the chainsaw won’t start further?

If the initial inspection did not give anything or the defects were eliminated during the search, and the chainsaw does not start further, then you need to look for more serious reasons. It is best to identify and eliminate such breakdowns in a service center. However, with experience, you can find and eliminate them yourself. What to diagnose and check?

  • Compression in the cylinder;
  • Compression in the crankcase;
  • Carburetor operation.
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In the first case, checking the compression in the cylinder will allow you to find out the state of the cylinder-piston group (CPG) of a chainsaw that does not want to start cold. For this you need a compressometer. The device is screwed into place of the spark plug and the engine is idle. Measurement of readings allows you to judge the state of the CPG. In the absence of a compression gauge, the compression in the cylinder can be determined offhand as follows:

  • Place your finger on the candle hole;
  • Try to start the chainsaw engine.

By placing your finger on the spark plug hole and pulling the starter, you can check the compression in the cylinder.

If you feel that your finger is pulling strongly into the candle channel, then everything is in order with the compression. The absence of vacuum in the chamber indicates a malfunction. The cylinder-piston group needs a more detailed inspection, which will give an idea of ​​the condition of the piston and cylinder, piston rings and bearings.

The chainsaw may not start on a cold one due to the lack of compression in the engine crankcase. The main reason for this is damage to the gasket placed between the cylinder and the crankcase. It is quite easy to detect the lack of compression:

  • Disconnect the upper tube from the carburetor;
  • Pour gasoline into a regular cork;
  • We immerse the removed tube in the fuel;
  • We pull the starter several times.

If the fuel is sucked from the cap when starting the chainsaw starter, then everything is in order with the compression. If not, see the gasket.

If the fuel is drawn in, then everything is in order. the gasket is intact. Otherwise, you will have to purchase a repair kit and replace it. How to do this watch the video, why the Chinese chainsaw does not start:

Starting the tool can be complicated by improper operation of the carburetor or its breakage. It often happens that during the sawing process, the fastening screws are loosened and air is sucked into the cylinder. Check that the carburetor is securely fastened. Inspect it for fuel leaks. There can be a lot of reasons for the malfunction. It is possible to pinpoint the malfunction, eliminate it and fine-tune the carburetor only in a service center.

After going through the step-by-step troubleshooting of the chainsaw engine, you can find the malfunction, fix it yourself and successfully start your working tool. Do not take on jobs that you are not sure about. Entrust the troubleshooting to specialists from the service center.

Identifying and eliminating obvious chainsaw malfunctions.

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

  • Spark plug present;
  • Fuel supply;
  • Filter status;
  • The operation of the breather of the stalling unit built into the fuel cap;
  • Discharge duct function.

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Checking the breather and cleaning it.

The breather is another element, from the improper operation of which the chainsaw may not start or stall during the sawing process. This element is located on the fuel tank cap in the area of ​​the air hole. This is a kind of valve that does not allow gasoline to flow out and equalizes the air pressure required for the free flow of fuel into the carburetor.

If the breather is dirty, the working chainsaw stalls, and when started, it refuses to start. The thing is that air stops flowing through the hole. As a result, a negative pressure (vacuum) is created inside the fuel tank, preventing the flow of gasoline to the carburetor.

Defining the problem is pretty straightforward. Disconnect the fuel hose from the carburetor and see what happens to the gasoline. If it flows freely in a good trickle, then everything is in order with the breather. If it is absent or it flows weakly and intermittently, then the reason is identified. the breather is clogged with dirt. You can solve the problem by cleaning the air hole with a regular needle or a powerful jet of compressed air.

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

The first step in finding the reasons why the gasoline saw won’t start is to check the spark on the spark plug. There are many factors that affect the performance of this element. However, the main ones at the initial stage of instrument troubleshooting are:

  • Incorrect carburetor adjustment;
  • The presence of more than it should be, the amount of oil in gasoline;
  • Clogged air filter.

All of them contribute to the formation of carbon deposits on the spark plug electrodes. In 50 cases out of 100, the saws do not start on a cold one due to the absence of a spark due to carbon deposits on the electrodes and their corrosion. As a result, the gap either decreases or increases.

Checking the spark plug with an idle chainsaw

It is quite easy to check for a spark. This will require:

  • Remove the tip of the high-voltage wire;
  • Unscrew the candle;
  • Put the tip back on;
  • Lean the candle with a skirt against the cylinder;
  • Start with a starter.

Chainsaw won’t Start/Run. Reasons for Engine Damage.

If a good spark is observed between the electrodes at the time of starting the engine of the chainsaw, then everything is in order with the ignition unit. If it is not there, then it is worth cleaning the element itself and checking the gap of the electrodes. If necessary, use a special probe to adjust the distance between the contacts.

For candles from different manufacturers, the distance between the electrodes may fluctuate. For some, it may be equal to 0.5 mm. Others have 0.2 mm. Therefore, carefully study the manufacturer’s recommendations.

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There may be no spark on the spark plug for other reasons. Of the main faults affecting the poor start of the chainsaw and the unstable operation of the internal combustion engine at idle, from which the tool can stall, the following can be attributed:

  • Overflow of the spark plug channel with fuel;
  • Lack of contact between the high-voltage cradle and the tip of the candle;
  • Failure of the ignition unit.

How to start a cold chainsaw if the spark plug channel is constantly flooding with gasoline? To eliminate the problem while starting the tool, you can use the following algorithm:

  • Unscrew the candle with a special key;
  • Wipe it with a clean and dry cloth;
  • Dry for 20. 30 minutes;
  • Remove carbon deposits with a file and adjust the gap between the electrodes;
  • Drain the remaining fuel from the spark plug channel and dry it;
  • Collect everything and try to start the mechanism.

As a rule, these measures are enough to start the chainsaw and get the job done. However, this extreme measure does not eliminate the main reason why the engine does not start or stalls. improper operation of the carburetor, which needs fine adjustment.

If there is no spark and poor contact of the high-voltage cradle with the spark plug tip, check the connection. The check can be done using a conventional tester. If a defect is found and it is eliminated, the chainsaw should start without any problems.

If the check showed that the contact is reliable, and the saw does not start further, look for the cause in the ignition unit. As a rule, a faulty unit cannot be repaired and restored. A complete replacement is required here.

Checking the condition of the fuel and air filters.

If everything is in order with the fuel quality, the chainsaw engine may not start due to clogged fuel and air filters. To diagnose these elements, it will be necessary to perform a number of manipulations associated with their dismantling.

For the fuel filter:

  • Disconnect the gasoline supply channel from the carburetor;
  • Pump up fuel.

If there is little or no pressure in the pipe, disconnect the filter. Before that, free the tank from the mixture and remove the filter element itself. Dismantling is done with a wire hook. A clogged replacement cartridge that causes a poor starting of the chainsaw engine can be cleaned, but it is best to replace it with a new one. When using the tool in dusty conditions, it should be cleaned on a regular basis.

A clogged air filter can cause the chainsaw engine to run erratically, making it stalling or difficult to start. Dust and dirt deposited on the adsorbent material make it difficult for air to enter the system, make the fuel mixture so rich that it will sometimes be difficult to start the tool.

Checking the air filter is one of the first steps in finding the cause of a poor start.

Care should be taken when removing the air filter, as dust accumulated on the surface of the saw during operation can enter the carburetor. And this is fraught with more expensive repairs. After detaching the cartridge, thoroughly clean it from the accumulated dirt and rinse it with the addition of detergent. Dry the element and put it back in place just as carefully.

Chainsaw outlet check.

One of the reasons that a chainsaw does not start well may be a clogged exhaust channel or its muffler. At the same time, a drop in power is noted in the process of sawing sawn timber and logs. This is most often due to resinous deposits on the spark arrestor or muffler channel, which are formed during the combustion of a poor-quality mixture of gasoline and oil, which impede the removal of exhaust gases.

Resonator clogged with carbon deposits can cause poor starting of the gasoline saw.

Eliminate the reason for the poor start of the chainsaw, in this case, you can remove the accumulated combustion products. To do this, perform a number of manipulations:

  • Remove the muffler by unscrewing the screws;
  • Remove the cooling panel and gasket;
  • Remove the spark arrestor;
  • Disassemble the resonator housing;
  • Wash all elements from carbon deposits with a detergent;
  • Let them dry completely;
  • Collect everything in reverse order;

To prevent dust and sand from entering the cylinder when cleaning the muffler, cover the outlet of the chainsaw engine with a clean rag.

Determine the availability of fuel and its supply.

First you need to make sure that there is a fuel mixture in the tank of a chainsaw that does not want to start, and it regularly enters the carburetor. With a full tank, we check how the mixture is fed through the gas line. Disconnect the fuel system pipe from the carburetor and try to pump it up. In the case of a complete order, when pumping up, gasoline will be supplied in jerks in accordance with the norms set by the manufacturer. Poor or no fuel supply may result from:

  • The fuel supply channel is clogged;
  • Debris-clogged fuel filter.

Often the reason for a poor start of the chainsaw can be a tank that is too full. In this case, you should pay attention to the presence of smudges under the saw case cover. If present, see the connection of the gasoline feed pipe to the carburetor. Most often, it is squeezed out by pressure when the tank cap is screwed on, which is filled under the very neck, which prevents the engine from starting.

The quality of the fuel mixture can also be one of the reasons why the chainsaw does not start. If, after completing the work, the remaining gasoline is not drained, and the tool is left for long-term storage (more than 2 weeks), then the processes of resin formation and polymerization of the components will begin to occur inside the tank. What can cause carbon deposits on the piston, rings and cylinder liner. Therefore, always prepare the mixture only in the required amount before work.

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Finding reasons why the chainsaw won’t start

Amateur and professional chainsaws are complex devices. The service life of their two-stroke engines, components and assemblies has its own limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when the chainsaw does not start or stalls is not very pleasant and sometimes confuses the user. How to identify and correct a malfunction by returning the instrument to work.

  • Identifying and eliminating obvious chainsaw malfunctions.
  • Checking the spark on the spark plug and eliminating the causes.
  • Determine the availability of fuel and its supply.
  • Checking the condition of the fuel and air filters.
  • Checking the breather and cleaning it.
  • Chainsaw outlet check.
  • What to do if the chainsaw won’t start further?

Why won’t it start and what to do

There may be several reasons why a chainsaw does not start or does not start. To install them, you need to diagnose the device. Possible causes of a problem launch:

  • there is no spark on the spark plug;
  • poor condition of the air and fuel filter;
  • poor fuel supply and exhaust duct performance;
  • poorly functioning breather, which is located on top of the tank.
Carbon deposits often appear on the spark plug electrodes and the tool does not start. Therefore, first check the spark plug. If the reason is not hidden in her, then the other elements are examined.
  • To test the spark plug, remove the spark plug. To do this, remove the tip located on the high-voltage wire, take out the candle and put the tip back on. The candle is applied to the cylinder and the starter is started. The engine ignition unit is operational if the electrodes generate a spark when switched on. When there is no spark, you need to adjust the distance between the electrodes with a feeler gauge or clean the entire part. To start the saw, the distance between the electrodes must be between 0.2 and 0.5 mm.
  • To check the fuel supply, you need to fill the tank with a fuel mixture. The system tube is disconnected from the carburetor and pumping is done. Fuel comes in jerks when the system is working properly. With a weak feed, clean the channel through which the fuel or filter is supplied. When gasoline smudges appear under the cap of the tank, this means that the tank is overfilled and may affect the operation of the engine.
  • Check the fuel filter by disconnecting it from the carburetor. The gasoline supply channel is disconnected and the fuel is pumped over. If there is no pressure in the pipe, then the fuel is drained from the tank and the filter cartridge is pulled out. It is cleaned or replaced with a new one.
  • A breather (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, then checked. Fuel should flow from the disconnected hose. If this does not happen, then it is cleaned with a simple needle or a jet of air under high pressure.

Reasons why the Partner (Partner) chainsaw won’t start and how to fix them

If the Partner chainsaw does not start, there is no need to rush to take it for repair. Each tool is accompanied by an instruction, which indicates how to fix the malfunction with your own hands.

If it starts and stalls

When the chainsaw starts and stalls, it is due to the carburetor or other parts. Reasons for the malfunction:

  • Poor fuel flow to engine. This is 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. This causes the saw to stop working.
  • Poor quality fuel.
  • The plug insulator overheats when poor contact is made between the wire cap and the plugs. Contact between them becomes worse with soot or mechanical shear.
  • Spark plugs defective.
  • Fuel does not flow well to the carburetor through the fuel filter or pump. As soon as the tool starts to increase the speed, it immediately stalls.
  • If the air filter is dirty, the engine cannot handle 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 filter, as well as the fuel pump.

  • During operation, the air filter is heavily clogged, and when the gas is pressed, 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 through it. The hose is cleaned or replaced with a new one if no fluid has leaked out. The filter is in good working order and you can skip checking it if the gasoline is flowing 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 changed to another.

In order for the saw 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 it is not possible to fix it on your own, then it is better to seek help from specialists.