Carburetor Adjustment Husqvarna 240

Technical characteristics of the chainsaw “Husqvarna 240 16-3 / 8 9665112-26”

Carburetor Adjustment Husqvarna 240

This model costs 13,000 rubles. And has an air purification system that reduces filter wear. The engine in the device is quite reliable and powerful, it contributes to economical fuel consumption, reducing the amount of harmful emissions. The chainsaw must be additionally warmed up when starting. As soon as the cold tool starts up, let it run for 30 seconds. Then you can engage and release the throttle lever. This will allow you to prepare the tool for work.

The “Husqvarna 240” chainsaw described in this section, the technical characteristics of which should be of interest to you, has a 40-cm tire, as well as a power of 2 liters. C. The volume of the engine is 38.2 cm 3, and the fuel tank holds 0.3 liters. It will be possible to fill in oil in the tank in a volume of 0.2 liters. Before purchasing this equipment, you must take into account that it belongs to the household class and weighs 4.7 kg. The number of links in the equipment. 56, the groove width is 1.3 mm, but the noise level is 100.7 dB.

Carburetor adjustment

The Husqvarna 240 chainsaw, which can be adjusted by yourself, is a tool that should not be repaired at home. However, you can do the adjustment of the mentioned node yourself, for this you need to learn how to distinguish between the screws. Each of them has a letter designation, the first is for setting low revs, the other. To adjust the high speed, while the third is used to adjust the idle.

Although the factory setting is considered optimal, the screws can be used to tune the engine. This is sometimes required when climatic conditions differ from those recommended by the manufacturer. To increase the speed, the first two mentioned screws must be turned back clockwise. The sequence of using the screws corresponds to that indicated above. If you have some doubts, it is better to contact a specialist, because if the carburetor of the Husqvarna 240 chainsaw is set incorrectly, the engine may be damaged.

What is important for the consumer to remember

Chainsaw “Husqvarna 240″, the technical characteristics of which should help you make the right choice, after purchase requires fine-tuning with a file. In this case, we are talking about adjusting the carburetor. It is also important to remember that there are systems for adjusting the supply of oil for chain lubrication in this equipment, however, it quite often happens that the oil tank is emptied faster than the tank designed for the fuel mixture.

The Husqvarna 240 chainsaw, whose technical specifications you can see below, is the equipment that follows the Husqvarna 236 range. If a comparison is made between these two options, then it should be noted that the latter has a higher power, a slightly longer tire and has an engine that saves fuel up to 25%.

Chainsaw “Husqvarna 240”, which often takes several centuries to repair, is an environmentally friendly tool, which is very important for some consumers. The volume of harmful emissions into the atmosphere has been reduced, and the number of cuts per fuel filling has been increased. Quite often, the products of the above-mentioned Swedish company are compared with chainsaws from the manufacturer Stihl. As an advantage of the former, the presence of a primer should be emphasized to simplify the launch. However, as practice shows, this does not greatly affect the equipment startup process.

User’s manual

The manufacturer emphasizes that the dust should not be used until the chain has been treated with a sufficient amount of oil. Before starting work, you need to familiarize yourself with the instructions also because from it you can learn about safety measures during work.

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For example, improperly combining the chain and track tire will increase the likelihood of kickback. But even if you read the manual, it is impossible to foresee the possible situations when using the saw, so the operator should be careful using common sense. It is necessary to use protective headphones, a special helmet, goggles and overalls during work.

  • Brake lever;
  • Economical fuel consumption;
  • Anti-vibration system.

But this list is NOT considered complete by consumers. They like the presence of a brake lever in the model, as well as the ergonomic design, low exhaust volume, and the presence of a chain tensioner.

  • Brake lever;
  • Economical fuel consumption;
  • Anti-vibration system.

But this list is NOT considered complete by consumers. They like the presence of a brake lever in the model, as well as the ergonomic design, low exhaust volume, and the presence of a chain tensioner.

The structure and principle of operation of the Husqvarna carburetor

To successfully tune your Husqvarna chainsaw carburetor, you need to know its design and understand how it works. In fact, everything is not as difficult as it seems at first glance.

The saw carburetor has a built-in fuel pump, which is responsible for transporting a mixture of gasoline and oil, as well as a diaphragm, a needle valve from the rocker arm. Their joint work allows metering the fuel supply to the main chamber and two dampers.

One of the valves is designed to adjust the fuel supply to the cylinder when the gas is pressed, it is called the throttle, the second. Responsible for limiting the air flow from the air filter to make it easier to start a cold Husqvarna chainsaw. At the moment when the operator cuts off the air supply to the carburetor with the help of the air damper, the fuel mixture becomes leaner and its supply to the cylinder increases, due to which the chainsaw starts much easier than in the case when a cold start is carried out in normal mode.

In the operation of the Husqvarna carburetor, a nozzle valve is involved, which atomizes the fuel and prevents air from entering the main chamber. Often, problems with saw operation can be caused by defects in this particular element. For example, a valve, if the chainsaw is not stored correctly, may stick, the fuel supply will stop, which will make the engine impossible to operate. Also, irregularities in the operation of the injector can become a prerequisite for air leakage into the main fuel chamber of the carburetor. In such cases, adjusting the position of the adjusting screws will NOT correct the situation, it will be necessary to repair or replace the unit.

By setting the quality and quantity of the mixture, as well as the number of revolutions of the crankshaft in idle mode, there are three adjusting screws installed in the carburetor body:

  • Screw (L). Regulates the amount of fuel in the low and medium speed mode;
  • (H). Responsible for traction at high speeds and their number;
  • (T). Changes the position of the throttle valve, thereby regulating the amount of the fuel mixture entering the cylinder and the operation of the engine of the tool in idle mode.

Output

Carburettor adjustment or repair work on Husqvarna chainsaws can be done WITHOUT some experience. In order to do everything right, you must follow the algorithm and have a minimum set of tools. It is also worth assessing your strengths in advance and NOT taking risks if you do not understand anything at all in the technique. Believe me, sometimes it is better to pay a small amount to the master than to ruin the instrument by self-adjustment.

Chainsaw. An indispensable tool for people living in private households. It is a mechanism consisting of carefully fitted parts and assemblies.

Like any mechanism, it requires periodic maintenance and adjustment. Especially because of low-quality fuel. Consider the principles and procedure for adjusting the carburetor of a Husqvarna chainsaw.

What is important for the consumer to remember

Chainsaw “Husqvarna 240”, the technical characteristics of which should help you make the right choice, after purchase asks for finishing with ratfil. In this case, we are talking about adjusting the carburetor. It is also important to remember that there are systems for adjusting the supply of oil for chain lubrication in this equipment, however, it quite often happens that the oil tank is emptied faster than the tank designed for the fuel mixture.

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How to adjust correctly

For this, the device has 3 adjusting nozzles. The idle speed screw (T) is located at the top of the carburetor. Below there is a pair of jets for adjusting the fuel supply at minimum (L) and maximum (H) rpm, left and right, respectively.

The procedure for adjusting the carburetor on a Husqvarna chainsaw is as follows:

  • Warm up for 5 minutes.
  • Turning screw L, we bring the engine to the highest speed in an unloaded state and return it back by a quarter of a turn.
  • Hold the throttle button with one hand for 15 seconds. At this time, we turn the H jet to the right until it stops and reaching the maximum speed. Then we turn it back one and a half turns, or Until the “squeal” of the engine disappears.
  • With the throttle released, turn the idle screw (T) clockwise until the chain does NOT move. After that, we rotate it in the opposite direction until the chain stops moving.

During the adjustment process, a situation may arise in which the chainsaw stalls. This may be due to excessively twisted jets, too rich or poor mixture.

If this happens, it is necessary to tighten the jets of the minimum and maximum speed until they stop. Then turn them back one and a half turns and try to get dust.

Husgvarna 240 chainsaw carburetor repair

This shows a common cause of malfunction on chainsaws with an accelerating pump. Be heed

Ignition adjustment after carburetor adjustment

If cleaning and adjusting the carburetor did NOT correct the existing problem, you need to check the spark plug and tune the engine. It is worth acting in the following order:

  • A candle is unscrewed and a visual inspection is carried out. If it is dry with a light brown carbon deposit, it can be considered intact.
  • If traces of gasoline are found on the spark plug, the carburetor should be readjusted. This happens because it supplies an excess amount of fuel to the internal combustion engine, we fill it.
  • If the candle looks normal, check the electrical equipment. First of all, the cable that supplies current to the candle. The end of it is brought a short distance to the radiator grille of the cylinder and the starter is turned with a cord. A spark should slip through. If not, the cable is checked with a tester and, if necessary, replaced.
  • If the cable is in good condition, the ignition coil is tested. If the inspection did NOT reveal singed or broken wires, the coil is called with a tester, comparing the data with the accompanying documentation. If deviations are found, the unit must be replaced with a similar.

After replacing the coil unit, the magneto gap should be set. The gap between the ignition coil and the flywheel should be between 0.2 and 0.4 mm. To set the gap, you need a set of probes, or you can use foil of a suitable thickness. The probe is clamped between the coil and the flywheel at the time of installation, and then pulled out.

How to adjust correctly

For this, the device has 3 adjusting nozzles. The idle speed screw (T) is located at the top of the carburetor. Below there is a pair of jets for adjusting the fuel supply at minimum (L) and maximum (H) rpm, left and right, respectively.

The procedure for adjusting the carburetor on a Husqvarna chainsaw is as follows:

  • Warm up for 5 minutes.
  • Turning screw L, we bring the engine to the highest speed in an unloaded state and return it back by a quarter of a turn.
  • Hold the throttle button with one hand for 15 seconds. At this time, we turn the H jet to the right until it stops and reaching the maximum speed. Then we turn it back one and a half turns, or Until the “squeal” of the engine disappears.
  • With the throttle released, turn the idle screw (T) clockwise until the chain does NOT move. After that, we rotate it in the opposite direction until the chain stops moving.
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During the adjustment process, a situation may arise in which the chainsaw stalls. This may be due to excessively twisted jets, too rich or poor mixture.

If this happens, it is necessary to tighten the jets of the minimum and maximum speed until they stop. Then turn them back one and a half turns and try to get dust.

The structure and principle of operation of the Husqvarna carburetor

To successfully tune your Husqvarna chainsaw carburetor, you need to know its design and understand how it works. In fact, everything is not as difficult as it seems at first glance.

The saw carburetor has a built-in fuel pump, which is responsible for transporting a mixture of gasoline and oil, as well as a diaphragm, a needle valve from the rocker arm. Their joint work allows metering the fuel supply to the main chamber and two dampers.

One of the valves is designed to adjust the fuel supply to the cylinder when the gas is pressed, it is called the throttle, the second. Responsible for limiting the air flow from the air filter to make it easier to start a cold Husqvarna chainsaw. At the moment when the operator cuts off the air supply to the carburetor with the help of the air damper, the fuel mixture becomes leaner and its supply to the cylinder increases, due to which the chainsaw starts much easier than in the case when a cold start is carried out in normal mode.

In the operation of the Husqvarna carburetor, a nozzle valve is involved, which atomizes the fuel and prevents air from entering the main chamber. Often, problems with saw operation can be caused by defects in this particular element. For example, a valve, if the chainsaw is not stored correctly, may stick, the fuel supply will stop, which will make the engine impossible to operate. Also, irregularities in the operation of the injector can become a prerequisite for air leakage into the main fuel chamber of the carburetor. In such cases, adjusting the position of the adjusting screws will NOT correct the situation, it will be necessary to repair or replace the unit.

By setting the quality and quantity of the mixture, as well as the number of revolutions of the crankshaft in idle mode, there are three adjusting screws installed in the carburetor body:

  • Screw (L). Regulates the amount of fuel in the low and medium speed mode;
  • (H). Responsible for traction at high speeds and their number;
  • (T). Changes the position of the throttle valve, thereby regulating the amount of the fuel mixture entering the cylinder and the operation of the engine of the tool in idle mode.

When does the carburetor of a Husqvarna chainsaw need adjustment?

There are a lot of problems that can be solved by adjusting the carburetor. Adjusting the carburetor of your Husqvarna chainsaw is necessary if such faults appear:

  • Increased idle speed;
  • Strong fuming during tool operation;
  • Difficulty starting a cold or hot engine;
  • Lack of traction and reduced maximum revs.

This is by no means a complete list of problems that can be solved by tuning the Husqvarna carburetor. In some cases, the quality and quantity of the fuel mixture is adjusted after an engine overhaul or in the process of scheduled maintenance of the chainsaw.

Chainsaws Husqvarna (Husqvarna) 240: features, characteristics, adjustment

Swedish Husqvarna chainsaws Presented on the market in professional and domestic class models. Excellent performance, durability, versatility make the manufacturer’s tools in demand in the world market. Reliability and durability are also ensured by high-quality assembly of chainsaws, parts made of forged steel and durable plastic.

How to properly adjust the carburetor of a Husqvarna chainsaw with your own hands

Chainsaw. An indispensable tool for people living in private households. It is a mechanism consisting of carefully fitted parts and assemblies.

Like any mechanism, it requires periodic maintenance and adjustment. Especially because of low-quality fuel. Consider the principles and procedure for adjusting the carburetor of a Husqvarna chainsaw.