The chainsaw shoots the carburetor cause

The engine “shoots

If during operation there are extraneous sounds similar to shots, then there is a problem with the muffler or carburetor. How do I keep my chainsaw quiet? It depends on which node the fault is in.

Plant device

The first and almost basic element of the chainsaw is the engine, namely the carburetor two-stroke (see carburetor adjustment). Its direct power is varied, it all depends on the model of the device and its direct purpose.
Chainsaw headset The second no less important part of the tool is the headset (saw), which consists of a chain (cutting), a tire, a sprocket, a wheel (chain). It should be added to this that completely different manufacturers provide their own specific range of this headset.

It is important that it always needs to be matched directly to the specific characteristic data of the engine. Since the larger the pitch of this kind of headset, the deeper the cut of the chainsaw will be, one might even say that the more powerful and productive it will be. Often, the owners of chainsaws think about why the chainsaw shoots at the carburetor, or why gasoline is not supplied to the chainsaw carburetor? But do not forget that for the full operation of the device, the engine should also not be inferior to it in power.

It is lubricated by means of a special oil directly from the second tank, which is located on the hand unit. It is worth noting that the mass of this kind of tank has such features that the oil and fuel intended for the engine run out at the same time.

We figured out the general outlines of the device, and most likely with its basis, and now it’s time to start figuring out why the chainsaw stopped working, what reasons might exist, and how to fix them.

The chainsaw does not cut under load and stalls

  • Clogged air filter. It is necessary to take out the filter, clean it well or even rinse it, dry it and put it back.
  • Incorrect proportion of oil / gasoline mixture. Drain fuel and re-mix oil and gasoline in the correct proportion.

Shoots at the muffler:

  • Enriched air-fuel mixture. Why does the chainsaw “shoot”? There is too much gasoline and too little air in the mixture, so the mixture does not completely burn out in the chamber and partially burns out in the muffler. Exhaust carbon is a clear sign of this. Air filter cleaning or carburetor adjustment required.

Causes and remedies

Undoubtedly, after reading this heading, you continue reading this paragraph and this is not surprising.

Even professional chainsaws from world famous manufacturers break down. no one is immune from this. The question is how often breakdowns occur and how serious they are. It is one thing to sharpen the chain or replace the drive sprocket, and another thing if the chainsaw does not start or fires at the carburetor. In fact, most of the faults can be easily eliminated with your own hands, for example, when the chainsaw does not lubricate the chain or stalls.

Chainsaw carburetor adjustment. what a beginner needs to know?

Initially, all adjusting bolts are in the factory positions. this ensures that the optimal amount of fuel and air is sucked in. However, due to prolonged use of the saw in difficult conditions, the factory settings of its carburetor may be violated. Even a slight movement of one of the bolts by 1/5 of a turn will seriously damage the saw motor. In this regard, the operator must constantly ensure that the adjusting bolts are in the optimal positions set at the factory.

If for some reason the work of the node has been disrupted, then it will need to be reconfigured. For this, 3 adjusting bolts are provided in the assembly. The first of them is marked with the letter H. it is needed to tune the engine of the chainsaw when operating at maximum speed. The second screw marked L is used to adjust the motor when running at low rpm. The third screw can be labeled T, S or LA. Its task is to configure the internal combustion engine when operating in idle mode.

READ  How to Replace a Chain on a Chainsaw

Chainsaw carburetor tuning must be carried out with a completely serviceable engine. Immediately before adjustment, you will need to inspect the air filter, and, if necessary, clean or replace it.

The chain does not cut

The decrease in the performance of the chainsaw is associated with the bluntness of the chain teeth. This is the most common problem because sharpening should be done regularly. How to do this using a machine, file or grinder, read the corresponding article.

Chainsaw carburetor

The chainsaw carburetor is the element that mixes the air / fuel mixture. Not only the stability of the engine, but also the speed of the entire chainsaw depends on the condition and serviceability of this important unit. In this regard, each owner of a garden tool should study the design of the carburetor, as well as familiarize himself with the rules for its maintenance and repair.

How to properly adjust the carburetor on a chainsaw?

Place the tool on a firm, level surface to set up the assembly. It is best to adjust the carburetor of the chainsaw in a place protected from dust and moisture.

The node setup process should look like this:

  • First you need to unscrew the fastening bolts and remove the protective saw body. This will make it possible to inspect the carburetor and, if necessary, clean it;
  • Next, you need to remove the standard air filter of the tool. If the saw is equipped with an additional foam insert, then it must also be removed;
  • After that, you need a screwdriver, with which you need to tighten the bolts marked H and L clockwise until they stop. This must be done very carefully so as not to break the bolts;
  • Then both screws should be unscrewed 1.5 turns in the opposite direction;
  • Next, you need to start the chainsaw engine and let it run for about 7 minutes;
  • As soon as the engine cylinder heats up, you will need to start turning bolt L until the internal combustion engine starts working at maximum speed. Immediately thereafter, the bolt must be turned 1/4 turn in the opposite direction;
  • Then you need to adjust the operation of the motor at high speeds. To do this, you need to connect an electronic tachometer to the engine, and start turning the bolt H until the readings on the instrument panel coincide with the instructions for the recommended maximum revolutions in the instructions for the saw;
  • In the end, it remains to adjust the operation of the internal combustion engine of the saw at idle. To do this, slowly turn the bolt T against the clock hand until the motor runs stably and without dips. If the engine starts to stall, then the T bolt should be turned in the direction of the clock hand.

Dirty Chainsaw Carburetor

To adjust the carburetor on a chainsaw, you should work as accurately as possible with the adjusting bolts. Excessive tightening of the screws will lead to increased stress on the engine and other important parts of the garden tool.

How to flush a chainsaw carburetor?

It is best to use a product that is commercially available in pressurized cylinders to remove stubborn dirt from the assembly. The kit includes a dispenser and a long thin tube that allows you to spray the product in any hard-to-reach places.

It must be remembered that cleaning the carburetor on a chainsaw is carried out using flammable chemicals. You need to work with them in a special protective mask and only in well-ventilated areas.

Two Stroke Chainsaw Carburetor ‘Pulse Line (Its Function!)

To clean the carburetor on a chainsaw, the unit will need to be partially disassembled. The throttle valve, adjusting screws, body and other carburetor parts will need to be rinsed with a bottle cleaner and set aside until completely dry. Once all the elements are dry, the unit can be assembled and installed back on the chainsaw.

Chainsaw carburetor device

Most modern chainsaws are equipped with nearly the same carburetors. They practically do not differ from each other, and work on a similar principle. The only difference between cameras from different manufacturers is the material from which they are made. In expensive American, Swedish and German chainsaws, cameras are made of reliable alloys, on which protective coatings are applied. Cheap Chinese and Korean chainsaws are equipped with nodes made from cheap materials.

chainsaw, shoots, carburetor, cause

Each carburetor consists of the following elements:

  • aluminum body with one-piece construction. Inside the body there is an inlet fitting, a main screw, an impulse channel, a bolt for adjusting the engine when idling;
  • throttle valve. it is responsible for adjusting the amount of air required to enrich the fuel mixture;
  • diffuser. located next to the chamber inlet;
  • sprayer. designed to supply the fuel mixture directly to the carburetor chamber;
  • float chamber. there is a float in it, which is triggered in the event of an insufficient amount of fuel;
  • nozzles. are valves that are responsible for adjusting the amount of fuel.
READ  How to Remove Clutch From a Chinese Chainsaw

This chain saw carburetor circuit is as simple and effective as possible. In some models of gardening tools, it can be supplemented with additional pipes, oil seals or filters.

The principle of operation of a chainsaw carburetor is quite simple. When the engine starts, the air damper located at the bottom of the housing opens. In this case, a vacuum is formed in the float and air chambers, caused by the movement of the piston. As a result, the standard diffuser is triggered, which begins to suck in air. The amount of intake air depends on the opening of the damper. When the piston is triggered, fuel begins to flow into the chamber through the inlet fitting. Its quantity and flow rate depend on the position of the nozzles.

Subsequently, the fuel in the air chamber begins to mix with air. After that, the finished air-fuel mixture passes through the intake valves, from where it is sent to the combustion chamber of the saw engine.

Gasoline does not flow into the chainsaw carburetor

If the fuel does not enter the standard chamber, then this may indicate several breakdowns at once. The first step is to check the air and fuel filters. During long-term use of the saw, these elements absorb a large amount of dust, which further prevents the infiltration of clean air and fuel. A slightly dirty filter can be cleaned with gasoline, but if the part is clogged with a lot of dust, then it will need to be replaced.

Another reason for the malfunction is the needle. This part sticks, especially in Chinese-made chainsaws. To fix the problem, in most cases it will be enough to simply move the needle.

If no fuel enters the chamber, the saw owner should inspect the seals on the tool. After several months of using the tool, these parts lose their tightness. Over time, they begin to leak gasoline, as a result of which the instrument stops starting. Repair is carried out by replacing the oil seals.

The breather plays an important role when starting the saw. It is located near the saw’s gas tank cover, and performs 2 tasks at once. it maintains optimal air pressure and does not allow fuel to flow out. To check the breather, you will need to turn off the fuel pipe and see how much gasoline flows out. If it does not leak at all, then the standard breather is clogged with debris and dirt. In this case, you will need to clean the element and reinstall it.

If fuel does not enter the chamber, then you need to check the fuel line. Most often, a Chinese hose is used to complete a budget-class tool, which loses its tightness over time. In this case, it will be necessary to replace the line, paying special attention to the tightness of the channel joints.

Chainsaw carburetor adjustment. what a beginner needs to know?

Initially, all adjusting bolts are in the factory positions. this ensures that the optimal amount of fuel and air is sucked in. However, due to prolonged use of the saw in difficult conditions, the factory settings of its carburetor may be violated. Even a slight movement of one of the bolts by 1/5 of a turn will seriously damage the saw motor. In this regard, the operator must constantly ensure that the adjusting bolts are in the optimal positions set at the factory.

If for some reason the work of the node has been disrupted, then it will need to be reconfigured. For this, 3 adjusting bolts are provided in the assembly. The first of them is marked with the letter H. it is needed to tune the engine of the chainsaw when operating at maximum speed. The second screw marked L is used to adjust the motor when running at low rpm. The third screw can be labeled T, S or LA. Its task is to configure the internal combustion engine when operating in idle mode.

Chainsaw carburetor tuning must be carried out with a completely serviceable engine. Immediately before adjustment, you will need to inspect the air filter, and, if necessary, clean or replace it.

Why the chainsaw shoots the carburetor?

If, during the launch and operation of the instrument, its owner hears sounds resembling shots, then this indicates a malfunction of the unit in which the fuel is mixed. The reason for this, most likely, is the following malfunctions of the chainsaw carburetor:

  • overtightened ignition. in this case, the fuel does not burn out, which leads to specific sharp shots;
  • feeding a mixture with a low concentration of gasoline to the carburetor. to fix the problem, you will need to adjust the jets.

If the shooting sound comes from the muffler, the problem is that the fuel mixture is oversaturated with gasoline. If there is too little air in the fuel, then it will burn not only in the chamber, but also in the muffler. This will be evidenced by a large amount of carbon deposits on the inner walls of the muffler.

READ  How to sharpen your saw chain correctly

Chainsaw won’t start

If there are difficulties with starting a chainsaw, many immediately sin on the carburetor. In fact, there are several options and the cause of the malfunction can be any:

Chainsaw Quick Tip #5 – Plugged Carburetor Problems & Repair

  • Clogged air and / or fuel filters. The problem is solved by cleaning the filters.
  • Lack of fuel in the tank. Yes, there is such a reason. some owners forget about such an insignificant detail as refueling a chainsaw and think that a couple of liters of gasoline will last for six months. In addition, the fuel in the tank should not be stored for more than 14 days, because gasoline evaporates and octane number is lost.
  • Check the pipe from the fuel tank to the carburetor. it could be clogged or cut off, so gasoline does not enter the tank.
  • No spark on spark plug. Why there is no spark. there can be many reasons: there is no contact, you need to change the candle or it is flooded. Why pours a candle on a chainsaw is another question. But if this happens, you need to dry and reinstall, and then check for a spark. If the spark plug is heavily soaked, it is recommended to replace it.
  • Check muffler for carbon deposits. If there is carbon deposits, thoroughly clean the muffler, but it is still recommended to take the chainsaw to a service center to check the cylinder and piston there, because carbon deposits are a sure sign of improper operation of precisely the elements of the cylinder-piston group.
  • The carburetor is clogged. How to properly adjust the chainsaw so that the carburetor works well was discussed in a separate article.

If none of the above methods helped, then the reason is more serious. the breakdown of one of the nodes of the connecting rod-piston group. In this case, it is recommended to take the chainsaw to a service center.

Shoots the carburetor:

  • Ignition too late. the air-fuel mixture does not have time to burn out in the cylinder, so a sound that looks like a small explosion is obtained.
  • Lean air-fuel mixture. Too little gasoline enters the mixture. adjustment of the chainsaw, or rather the jets, is required in order to increase the fuel supply. Why the chainsaw thrusts itself. for the same reason.
chainsaw, shoots, carburetor, cause

Stalls immediately after launch:

  • The fuel mixture is not prepared correctly, there is too much oil in it, so the octane number of gasoline is less than it should be, so the chainsaw only works on suction or immediately stalls.
  • Spark plug carbon deposits or improper spark plug-to-wire gap.

The chain does not rotate

Why the chainsaw chain does not rotate when the engine is running even at full speed?

  • Leading asterisk. Either it is jammed, or the crown is worn out so much that it does not engage and the chain does not spin on the chainsaw. In any case, it is necessary to disassemble the sprocket in order to find out the exact reason why the chain does not spin. If the crown is worn out, it is necessary to replace the sprocket (or the crown itself, if the sprocket has a prefabricated structure).
  • The chain brake is jammed. As a result, the sprocket is blocked by the brake mechanism, while the motor runs. Stop the engine and release the brake. If this happened under load, the brake mechanism will have to be changed, as well as the sprocket, because due to the high temperature, many elements can melt and overheat.

The engine “shoots

If during operation there are extraneous sounds similar to shots, then there is a problem with the muffler or carburetor. How do I keep my chainsaw quiet? It depends on which node the fault is in.

Chain brake does not apply

All chainsaws are equipped with a main and inertial (emergency) brake. The latter turns on only when a kickback occurs. The main brake is designed to stop the chain when the engine is running. Why does it grip the chain on the chainsaw and it doesn’t stop? There are two options:

  • The brake band is badly worn and does not provide sufficient stopping effect. The brake band needs to be replaced.
  • Contamination of the tape. When working in the undercover space, debris can be clogged: shavings, sawdust, dirt, etc. Debris blocks the brakes, so if the brakes don’t work, clean the brakes.

The chain does not cut

The decrease in the performance of the chainsaw is associated with the bluntness of the chain teeth. This is the most common problem because sharpening should be done regularly. How to do this using a machine, file or grinder, read the corresponding article.