Chainsaw Husqvarna 236: features, characteristics, do-it-yourself repairs

A chainsaw is considered by many as an ideal and indispensable assistant. After all, with its help you can perform all the work that an ax previously helped to do, without spending a lot of effort and time. That is why almost every home craftsman has such a tool in his arsenal.

The design of the units in question is not that complicated. This means that every craftsman can repair the instrument, taking into account the advice of specialists. We will look at the sequence in which the Husqvarna 236 carburetor is adjusted with our own hands.

Carburetor components

First of all, it’s worth figuring out which adjustment screws are provided in the Husqvarna 236 chainsaw.

The manufacturer equipped the model in question with 3 screws:

• The L-screw adjusts the jet at low speeds;
• The H-screw adjusts the jet at higher speeds;
• The T-screw is used to adjust the idle speed.

If it is necessary to adjust the supply of fuel, lubricant mixture and air access, the first 2 elements are used. By turning them clockwise, the mixture can be leaner and the speed reduced. By performing the actions in the reverse order, that is, unscrewing the elements in the opposite direction, the mixture is enriched and the speed increases.

Idle speed is adjusted by the third element. By turning it clockwise, the speed increases, and to decrease it, simply turn the screw in the opposite direction.

Application

The manufacturer recommends using the Husqvarna 235 chainsaw for gardening, preparing firewood for heating or any other household needs. Thanks to its small size, you can take the saw with you on a hike.

The saw has a significant drawback - it cannot be used daily. With constant use, when the chainsaw is used non-stop for several hours a day, its piston group will quickly wear out.

Therefore, if a saw is required for continuous work, then it is better to pay attention to other models aimed at professional or semi-professional use

Step-by-step adjustment

Experts recommend that you independently adjust the carburetor in the model in question, adhering to the following plan:

1. First of all, you need to adjust 1 screw, then proceed to the second and only lastly start adjusting the screw responsible for idle speed.
2. Next, you need to determine what the highest idle speed is. To do this, you need to carefully turn 1 screw clockwise. Having found the largest indicator, the element should be turned ¼ turn counterclockwise. If during this operation the chain continues to rotate while idling, screw T must be slowly turned counterclockwise until the chain stops rotating.
3. Using screw H for adjustment, you can actually change both the power of the unit and its speed. However, it is worth keeping in mind that if the carburetor operates for a long time using the usual mixture and at high speeds, this may cause the chainsaw to fail.
4. To adjust screw H, you need to take the following steps:

• warm up the engine of the unit for 15-20 seconds, selecting full speed mode;
• turn the H-element counterclockwise ¼ turn;
• leave the engine running for 10-15 seconds;
• using a tachometer, analyze what the maximum speed is;
• If the received data does not match the passport data, the process should be repeated again.

The four-stroke sound of the engine will help you understand that the adjustment has been made correctly. If the mixture is too lean after adjustment, the unit will make a squealing sound. If the mixture is too rich, smoke will begin to appear from the muffler. If home craftsmen have a device called a tachometer in their arsenal, then you can begin to independently adjust the H-screw. In other circumstances, it is better to seek help from specialists.

1. After the first elements have been adjusted, you can begin adjusting the idle speed screw, performing the operation in the following sequence:

• Having activated the engine, you should carefully begin to turn the screw T clockwise;
• it is necessary to rotate the element until the unit chain begins to rotate;
• at the next stage, the screw must be turned in the opposite direction to stop the rotating movements of the chain.

To understand that it was possible to correctly set the idle speed, uniform operation of the engine, in any direction, with the necessary reserve of revolutions, while the chain rotates, will help.

The above instructions for adjusting the Husqvarna 236 carburetor will greatly simplify the work. But if some stage still causes difficulties, everyone can find a hint by visiting an Internet resource and watching a video tutorial on this topic.

You can independently understand that the work was done correctly by the operation of the engine, which should accelerate instantly and make a four-stroke sound at full throttle. If the unit starts with difficulty and the engine cannot accelerate immediately, the first screw should be readjusted again to enrich the lean mixture.

A chainsaw is a tool that is useful in any country house, even for amateurs, not to mention professional workers. But, like any other device, a chainsaw needs constant care and prevention. One of the most common procedures is to adjust the carburetor of a chainsaw due to incorrect settings in the past.

The first signs of a carburetor malfunction

Due to untimely or unprofessional periodic maintenance of the chainsaw, as well as due to heavy load, difficulties in its operation may arise from time to time. For professional workers, such breakdowns can reduce their work efficiency and spoil their mood for the whole day.

Carburetor malfunctions, in turn, have specific symptoms. Using them, you can immediately determine the cause of the breakdown.

The following signs indicate an incorrect carburetor setting:

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1. The tool starts up problematically, after which it immediately stalls.
2. The chainsaw stalls when you press the gas.
3. Gasoline is consumed in large quantities, and it still remains in the cylinders and does not burn out completely, and the exhaust is excessively thick.
4. The carburetor settings installed at the manufacturer's factory are lost due to improper use or self-adjustment.
5. Debris has entered the air intake system. Because of this, she failed.
6. Engine pistons are used up. In this case, adjusting the carburetor will only temporarily solve the problem.

In the event that dirt gets into the carburetor, one adjustment will not do. Here you just need to clean it. When the pistons are used up, a major overhaul of the engine is required.

But after this, of course, you need to adjust the carburetor jets, as well as purge and clean them.

Owner reviews

Nikolay, Rostov:

“I’m not happy with the purchase; during the warranty period, the chainsaw took me to service three times, although there were no prerequisites for breakdowns. At first it started stalling, and the piston finally jammed after a year of operation. After disassembly, it was determined that there were huge scuffs on the piston, I changed a number of spare parts, and with all these repairs it cost me double the price! I read glowing reviews and envy the boys. Apparently, I really was just unlucky. Now I think that it can only be used for spare parts, since our labor relations with this chainsaw have not grown together.”

Operating principle

The purpose of the carburetor is to prepare the working mixture for supplying it to the engine cylinders. This mixture is gasoline and air in the proportions required for engine operation. If this ratio is violated, the engine will not operate smoothly. When the mixture has a lot of gasoline, then in layman's terminology it is called saturated, and if, on the contrary, there is little, then it is lean. But in any case, a failure in the proportions of the working mixture will have a bad effect on performance.

Different models of chainsaws may have different carburetor designs, but according to the principle of operation they are all identical. Air moves through a special channel at a speed that can be adjusted by closing or opening the damper. Gasoline, in turn, enters the carburetor through jets and mixes with air there, creating a special mixture that enters the engine.

The pressure in the float compartment of the carburetor, where gasoline is present before mixing, is close to atmospheric. When the damper is opened, there is more air, as well as gasoline, due to which the engine speed increases. This creates a vacuum in the air channel and gasoline is drawn into the air flow. This is the principle of operation of a carburetor .

In order for the chainsaw to operate smoothly and efficiently, and also without high fuel consumption, its carburetor must be adjusted accordingly. Before such work, you must first check the air and gasoline filters. If dirt is found on them, they should be replaced.

Setting up a chainsaw for most models is usually done using three screws - high and low speed and idle speed.

The following signs should indicate correct configuration:

1. The chain should not move at idle.
2. The motor runs smoothly.
3. There should also be no interruptions in work at start-up.

Repairing a chainsaw carburetor with your own hands must be done very carefully, because any mistake made can lead to serious consequences, even to the point of complete engine failure. If you do not have sufficient experience, then it is better to seek the help of a specialist .

Adjusting the Husqvarna chainsaw

During the break-in period of the Husqvarna chainsaw 142, 240, 236, 137 and other similar models, the carburetor settings are set in such a way that the engine speed is 600-700 less than normal operating speeds. If the operating frequency cannot be adjusted using the tachometer, it is not recommended to reset the factory settings using screw H.

The manufacturer strictly prohibits exceeding the working speed on your own. When, after adjusting the carburetor, the chainsaw chain moves at idle, then by turning screw T counterclockwise you need to stop it.

In order to accurately adjust the saw , it must be installed on a flat surface with the bar facing forward. You also need to warm up the engine for at least 12-15 minutes. First you need to determine the highest idle speed number. To do this, screw L in the chainsaw must be turned clockwise, and then in the opposite direction. After determining the desired frequency, the same screw is turned counterclockwise from 12 to 25% of its full revolution.

The idle speed in models from this manufacturer is adjusted using a jet with the letter T. The adjustment is made by turning it clockwise until the chain moves. After this, turn it easily counterclockwise until the chain stops moving.

The H screw of the chainsaw is adjusted correctly only when the saw does not make much noise when the gas is pressed all the way, and at the same time it is not weighed down by any load.

In the case when the saw is too noisy during operation and smokes, then this jet must be turned from left to right for adjustment.

Saws Shtil and Partner

In chainsaws Shtil 250, 361, as well as Partner 351, 350, the carburetor is adjusted using screws H and L by setting the proportions of gasoline and air. If you release them, a large part of the fuel will be added and therefore the speed will be high, otherwise, on the contrary, it will drop.

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The idle speed in Partner chainsaws is regulated using a screw with the letter T, but with Shtil, as a rule, you need to look for the LA marking. Standard adjustment of the chainsaw is carried out during final tests. Basically, after such settings, the percentage of fuel in the working mixture is greater than air, which does not correspond to the optimal parameters. But they must be preserved during the first hours of operation during the running-in of the device. After this, the saw can be adjusted independently, but it will work well even at the factory settings.

But if you decide to regulate yourself, then the actions must be performed in the following sequence:

• adjusting screw L;
• then adjust the jet H;
• after that, proceed to adjusting the idle speed using screw T (if the Shtil chainsaw is LA).

First, screw L must be turned in both directions in order to find the maximum engine speed. If that point is found, then turn the same screw by ¼, thereby slowing down the speed a little. If the chain continues to move at idle, you must immediately turn screw T (LA) until the chain stops completely.

After setting the maximum speed with screw H, you need to check the frequency on the tachometer. In the event that it does not correspond to those specified in the service book, the setting must be repeated. When a lot of smoke comes out of the exhaust pipe at maximum speed, the mixture is too rich in fuel; if noise is heard and the engine gets very hot, then, on the contrary, it is lean. Then you need to adjust the idle speed. With proper settings, the engine should sound smooth at low speeds, and the chain should not move.

Chinese models

Adjusting the carburetor of a Chinese chainsaw, for example, Carver, is carried out in almost the same way as factory models. There are the same three main adjustment screws L, N, T. Sometimes such models have the ability to adjust the idle speed. But as a rule, employees of specialized services and owners of such saws claim that it is not always possible to set up a high-quality Chinese chainsaw right away.

For classic Chinese models, screw L should be loosened 1.5 turns from the maximum value. Screw H must be loosened one revolution from the maximum. Idle speed is adjusted in the same way.

Thus, self-adjustment of a chainsaw carburetor is not a very complicated process and can, in most cases, be done by a self-taught person.

Adjusting the carburetor on a chainsaw in Husqvarna

Tools required for work

Before you start setting up the Husqvarna carburetor, you need to make sure you have all the tools that may be useful. To carry out this type of work yourself, you will need:

• a screwdriver for adjusting screws (H) and (L), it can be bought in specialized stores;

• electronic tachometer for determining crankshaft speed readings (with some experience, you can make adjustments by ear);

• Phillips screwdriver for adjusting screw (T);
• compressor with a blow gun for cleaning the saw before work.

A regular slotted screwdriver will not work for adjustment, since the adjusting screws on Husqvarna chainsaws can have different cross-sections. You will have to purchase a special one, this is a feature of repairing Husqvarna chainsaws; they did everything so that the saw could be repaired only in a specialized Husqvarna service center.

Husqvarna 137 Carburetor Adjustment and Adjustment

In the picture above you can see three screws for adjustment. Each of them has its own purpose:

To adjust the idle speed, screw T is required.

Screw L is used to adjust low speed.

Screw H adjusts high speed.

Setting procedure:

First screw L (by rotating it), we look for the highest idle speed. Once we have found them, you need to turn this screw a quarter turn counterclockwise. If the chain continues to rotate in this position, then we turn screw T to stop it.

Then warm up the engine at full speed for 10-15 seconds and turn screw H a quarter counter to the hour. We wait 10 seconds and listen. The engine should run like a 4 stroke sound. If a squeal is heard, then the mixture is bad (we tighten the screw), if the rich mixture is smoky (tighten the screw).

After adjusting the low and high speed, set the idle speed using screw T. This is done as follows:

1. The engine must be running

2. Turn screw T clockwise until the chain starts to rotate.

3. Turn the screw to the other side until the chain stops.

How to adjust correctly

For this purpose, the design of the device provides 3 adjusting jets. The idle air adjustment 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) speeds, left and right, respectively.

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

1. Warm up for 5 minutes.
2. By turning screw L, we bring the engine to the highest speed in an unloaded state and return it back a quarter turn.
3. Hold the gas button with one hand for 15 seconds. At this time, turn the jet H to the right until it stops and reaches maximum speed. Then we turn it back one and a half turns or until the “squealing” of the engine disappears.
4. After releasing the gas, turn the idle speed screw (T) clockwise until the chain begins to move. After this, 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 could be due to the jets being too tight or the mixture being too rich or too lean.

If this happens, you need to tighten the minimum and maximum speed jets all the way. Then turn them back one and a half turns and try to start the saw.

Setting the ignition after adjusting the carburetor

If cleaning and adjusting the carburetor does not correct the existing problem, you need to check the spark plug and adjust the engine. You should act in the following order:

1. The spark plug is unscrewed and a visual inspection is carried out. If it is dry with a slight brown soot, it can be considered in good condition.
2. If traces of gasoline are found on the spark plug, the carburetor should be re-adjusted. This happens because it supplies excess fuel to the internal combustion engine, flooding it.
3. If the spark plug looks normal, check the operation of the electrical equipment. First of all, the cable that supplies current to the spark plug. Its end is brought a short distance to the radiator grille of the cylinder and the starter is turned with a cord. There should be a spark. If it is not there, the cable is checked with a tester and replaced if necessary.
4. If the cable is in good condition, test the ignition coil. If the inspection does not reveal singed or broken wires, the coil is run through a tester, comparing the data with the accompanying documentation. If deviations are detected, the block must be replaced with a similar one.

After replacing the coil unit, the gap in the magneto should be adjusted. The gap between the ignition coil and the flywheel should be from 0.2 to 0.4 mm. To set the gap, you need a set of feeler gauges 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.

Adjusting the carburetor with your own hands on a chainsaw

Adjusting the chainsaw carburetor ensures efficient operation of the tool at full power with economical fuel consumption. The adjustment should be made using a clean fuel and air filter. The adjustment is made with three screws: for maximum and minimum speed and idle speed.

Screws H and L regulate the mixture ratio of gasoline and air, determined by the opening of the carburetor throttle valve. When the screws are loosened, the mixture becomes richer, and the turns fall accordingly, when twisting, the mixture is depleted. revolutions increase.

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The designation H refers to the maximum speed screw, which controls the main jet, L. to the minimum speed screw, which controls the idle jet. Using screw S, the idle speed is precisely adjusted. Sometimes, to make adjustment easier, the number of available carburetor adjustment screws is reduced.

Setting the carburetor to two stages. basic (factory settings) performed with the engine turned off. and the finale, released with the engine running hot. The exact angular values ​​should be taken from the operating instructions for the specific chainsaw. If the manufacturer's instructions are not followed, the engine may be damaged.

The engine stalls when you press the gas: causes and solutions

This process may be based on:

• fuel filter clogged;
• depressurization of fuel hoses;
• muffler malfunction;
• jamming of the valve in the float chamber due to which the mixture does not flow in full;
• Air filter contamination;
• failure of the crankshaft seals.

Eliminating all the identified causes comes down to:

• cleaning working bodies associated with liquids or air working environment;
• external inspection of the listed parts for problems;
• replaced old parts with new ones.

Correct adjustment of the carburetor, which is quite feasible at home, plays an important role in stabilizing the working stroke of the Husqvarna chainsaw.

Husqvarna 236 carburetor repair (repair kit replacement)

Replacing the carburetor repair kit on a Husqvarna 236 chainsaw

.

Basic carburetor adjustment.

The adjustment screws with maximum H and minimum rotation L are slowly turned clockwise until they stop, then they turn 2 turns, other settings are possible

Checking and adjusting idle speed.

We find the highest idle speed; to do this, slowly turn the screw L in different directions. After determining the maximum engine speed, turn screw L 1/4 turn counterclockwise. If the chain rotates at idle, turn screw T or (S) clockwise until it stops.

Check and adjust the maximum speed.

Changing the maximum number of revolutions is carried out by screw H. When it is tightened (clockwise rotation), the speed increases as you turn it. are decreasing. Chainsaw engines have a maximum rotation speed of 11,500 rpm. up to 15000 rpm. Higher speed does not provide ignition, in addition, it becomes dangerous for the engine. The maximum speed can be determined by interruptions in the ignition. If they come, screw H is turned slightly counterclockwise.

If the engine operation is not checked for acceleration and maximum speed, the chainsaw adjustment cannot be considered complete.

Description

Chainsaw Husqvarna 236 X-TORQ 9666399-06 is a lightweight and versatile chainsaw for occasional sawing work. Easy to use and start, convenient model for private use. The engine with innovative X-Torq technology provides increased torque over a wide speed range and also saves up to 20% fuel.

Engine specification Cylinder displacement, cubic meters. cm 38.2 cm? Power 1.4 kW Idling speed 3000 Rotation speed, rpm Maximum speed 9000 Rotation speed, rpm Cylinder diameter 40 mm Cylinder stroke 32 mm IIDA ignition system Ignition module air gap 0.3 mm / 0.01 “ Spark plug Champion RCJ7Y Interelectrode gap 0.5 mm / 0.02 “Carburetor model ZAMA W-33 Fuel tank capacity 0.3 l Oil tank capacity 0.2 l Oil pump type Fixed flow Oil pump capacity 8-8 ml/min Cutting equipment Chain pitch 3/8 inch Recommended bar length, min-max 33-40 cm / 13”-16″Chain rotation speed at maximum speed 16.3 m/sBar mount SmallExhaust, vibration and noise information Equivalent vibration level (ahv, eq), front/rear handle 2 ,1/2.7 m/s? Sound pressure near the operator’s ear 100.7 dB (A) Guaranteed sound power, dB (A) 113 dB (A) General dimensions Weight (without cutting equipment), kg 4.7 kg Package size, LxWxH 46x30x30 mm Logistics data Pallet size, LxWxH 1450x1140x1160mm Number of pallets 32 Products per 20-foot container 704 pcs Products per 40-foot container 1472 pcs Products per 40-foot HC container 1472 pcs.