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.
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
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.
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.
Chainsaw won’t idle? Hard to start when warm? WATCH THIS!
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.
Reduced compression
One of the most common cases of difficult starting a chainsaw is wear of the CPG (cylinder-piston group).
As you know, for the normal start of a chainsaw, compression must be present in its engine. It is necessary for the normal compression of the fuel mixture in the engine cylinder, it also affects the operation of the fuel pump.
During the operation of the tool, the value of the compression ratio falls, and the chainsaw starts to start poorly.
The reasons for the lack of compression, or its reduction, may be natural, because the engine wears out during operation. Also, problems can be caused by a serious breakdown, for example, a seizure of the CPG, or a broken piston ring.
A sign of reduced compression is a weak resistance of the starter when starting. With reduced compression, a decrease in the power of the chainsaw is observed, which negatively affects its performance. The problem is eliminated by replacing the piston rings, or completely by the CPG.
Partner 351 chainsaw will not start
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.
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.
Fuel and air filter
Contamination of the main filter elements of the chainsaw, negatively affects its operation.
For example, a dirty air filter will not fully supply air to the carburetor, which will affect the quality of the air-fuel mixture and the normal starting of the engine. Contamination of the fuel filter will make it difficult or even completely cut off the gasoline supply to the carburetor and make it impossible for the engine to work.
Malfunctions in the fuel system
It is necessary to proceed to the diagnosis of the fuel system if it turns out that the spark plug is dry, but there is a spark. The first thing to check is how dirty the fuel filter is. Then check the integrity of the hose and the quality of its attachment to the carburetor. Check for fuel leaks. If during visual diagnostics it was not possible to identify the cause of the inoperative saw, then then you need to proceed to a more detailed examination of the carburetor.
One of the characteristic signs of a breakdown in the fuel system is the multiple appearance of fuel in the cylinder. This is evidenced by a wet candle, but a spark appears on the contacts. If you tilt or turn the saw with the spark plug hole down and you find that the fuel mixture is flowing from the cylinder, then the cause of the malfunction is the engine overflow.
Malfunctions in the engine
Among the main problems that arise with the motor, there are: sticking rings, air leaks, compression loss, CPG wear. Many owners have noticed that the instrument does not turn on when it is cold, but starts up without problems when it is hot. This malfunction occurs when the CPG is slightly worn, when the compression in the motor decreases. For a more accurate diagnosis, it is advisable to contact a specialized center.
Chainsaw won’t start: top 3 main causes of breakdowns
The chainsaw starts, but when you press the gas, it immediately stalls
If you managed to start the saw, but it stalls after working for a short time, then the first thing to check is the presence of fuel. Many people forget that the fuel in the tank is not eternal and immediately try to look for the causes of the malfunction. If the saw stalls and there is fuel, evaluate the performance of the tool before the problem occurs. Perhaps there was a non-standard sound, rattling, ringing, power loss, or something else.
Malfunctions in the ignition system
If in the process of visual diagnostics it turned out that the plug is wet, then the entire ignition system will have to be examined in more detail. Inspect the coil to ensure that the clearance between the flywheel and coil contacts is correct. Check the contact between the wire cap and the spark plug.
Why the chainsaw stalls at idle?
If the saw stalls at idle, then you should pay attention to the carburetor adjustment. You can make repairs yourself using a special screwdriver. Another way to solve the problem is to disrupt the operation of the fuel pump due to air leaks into the crankcase.
Malfunctions in the ignition system
If, when inspecting the spark plug, it is found that it is wet and sparking on the contacts does not occur, this means that the problem should be looked for in the ignition system, inspect the coil, check the gap between the flywheel and the coil contacts. You can also check how tightly the cap of the high-voltage wire sits on the candle, and the candle itself. Try to replace it with a new one.
Chainsaw stalled and won’t start
If the tool stalled and does not start, first check the presence of fuel in the tank. Oddly enough it sounds, but many people forget about it and when a similar situation arises, they immediately try to repair the instrument, which can lead to serious damage.
In a situation where the saw has stalled, and there is still gas in the tank, you need to evaluate how the saw has worked up to this point. Maybe at the last moment, there was an extraneous sound, grinding, ringing, a loss of power, or the instrument stopped abruptly. All this will allow a preliminary assessment of the situation.
Fuel and air filter
Contamination of the main filter elements of the chainsaw, negatively affects its operation.
For example, a dirty air filter will not fully supply air to the carburetor, which will affect the quality of the air-fuel mixture and the normal starting of the engine. Contamination of the fuel filter will make it difficult or even completely cut off the gasoline supply to the carburetor and make it impossible for the engine to work.
Malfunctions in the engine
CPG seizure, ring sticking, CPG wear, air leakage through oil seals and gaskets, compression loss, all these problems can make starting the chainsaw impossible or significantly complicate it. For example, if the CPG is not significantly worn out, the compression in the engine decreases. In this case, starting on “cold” will be significantly difficult, or the saw may stop starting, and on “hot”, the tool will start well.
It is quite difficult to accurately diagnose problems in the engine associated with problems in its starting, and it is better to turn to a specialist in this field for this.
Carburetor adjustment
Incorrect carburetor adjustment will cause the chainsaw to not develop full power. It will be difficult to start, or not at all. The carburetor setting directly affects the quality of the air-fuel mixture, which is necessary for normal starting and further engine operation.
If the carburetor is incorrectly adjusted, more or less gasoline will be present in the fuel-air mixture than required, and the mixture will not ignite even with normal sparking.
An excess of gasoline in the mixture is called overflow. A characteristic sign of overflow is a wet spark plug, after several unsuccessful attempts to start the chainsaw.
Chainsaw does not start well when cold
Chainsaw will not start when hot
In cases where the chainsaw does not start up hot, you need to conduct a visual inspection of all the main units of the chainsaw. Inspection should start with the spark plug. Check the spark, inspect the surface of the spark plug electrode, these steps will help establish the direction in which to look for the problem.