Carburetor Adjustment Husqvarna 236
About the carburetor device
The carburetor serves to mix the combustible consistency with air, observing the proportions established in advance. When is the carburetor of a chainsaw necessary to adjust? Husqvarna 137. If precise doses are not adhered to, the proper functioning of the engine is at risk. Adjusting the carburetor of a Husqvarna 137 like a Husqvarna 240 or 260 will save the chainsaw too. When a huge amount of air enters during mixing of the component, and there is not enough fuel, then such a mixture is considered poor.
Over-saturation should not be allowed, because with a large amount of fuel compared to air, malfunctions or engine wear are also likely. Adjustment of the carburetor is needed not only before the initial introduction, but also when any differences in its operation are revealed. Before using the chainsaw, do not forget to run it in.
Components of the carburetor
The carburetor design contains a standard set of parts, but may vary slightly depending on the manufacturer. Components:
- The basis. It is a special tube that visually resembles an aerodynamic structure. Air passes through it. In the transverse direction, a damper is located in the middle of the pipe. Its position can be changed. The more it is pushed into the passage, the less air enters the engine.
- Diffuser. This is the tapered part of the tube. With its help, the air flow rate increases exactly in the segment from which the fuel comes out.
- Fuel supply channels. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which it flows into the sprayer.
- Float chamber. Carburetor adjustment Husqvarna 236. Do-it-yourself carburetor adjustment; It is a separate structural element, reminiscent of the shape of a tank. Designed to constantly maintain an optimal level of fuel fluid in front of the entrance to the channel where the air comes from.
Not sure which chainsaw to choose? Read our article.
Looking for models that are cheaper, but reliable and time-tested? Pay attention to Russian-made chainsaws.
Alternatively, research foreign chainsaw manufacturers such as Stihl.
What you need to have to set up
Every carburetor owner should have the necessary tools to adjust this system. Chainsaw carburetor device, DIY Stihl carburetor adjustment. There are three adjusting screws located on the body of the device. They have their own markings:
- L screw for low rpm correction.
- H screw for adjusting high speed.
- T regulates the idle speed, in most cases it is used for experiments.
Husqvarna brand saws come in many models, which include professional and household grade tools. The reliability and durability of these chainsaws proves the high demand for them. The simplicity of the design with the availability of spare parts makes the tool easy to service. The country of origin of these chainsaws is Sweden. The brand has established itself in the world market as a manufacturer of quality tools for general use. Let’s consider the device and characteristics using the example of the Husqvarna 236 chainsaw. Despite its low cost, high-quality materials are used for its manufacture, the design is convenient and ergonomic, and the assembly is very accurate and reliable.
Husqvarna 236 carburetor adjustment
The chainsaw is considered by many as the ideal and irreplaceable assistant. After all, with its help, you can perform all the work that the ax previously helped to do, without spending a lot of time and effort. That is why almost every home craftsman has such a tool in his arsenal.
The design of the units under consideration is not so complicated. And this means that every craftsman can repair the tool, 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.
Features of model operation
Adhering to the manufacturer’s operating recommendations, you will significantly extend the service life of the chainsaw, save it from premature repairs. One of the main requirements is the use of high-quality fuels and lubricants. Refuel the saw with a mixture of petrol and oil in a ratio of 1:40. Gasoline grades AI-92 or 95 is suitable. Oil is selected based on operating conditions. It can be either mineral oil or synthetics. The second option is more expensive, but still more effective.
It is also important to run in the tool correctly. It is carried out according to the following algorithm:
- Start the chainsaw and warm it up for a few minutes.
- Work the tool for about half an hour at light loads, sawing thin branches.
- Then you can gradually increase the load.
Design and features of the Husqvarna 236
The diagram of the structure of the chainsaw is shown in the picture below:
The Husqvarna 236 chainsaw is designed for operator comfort and safety. An emergency brake with a quick stop of the mechanism is provided. There is also a system for catching a loose chain, which protects against accidental injury during operation. Centrifugal air purification system contributes to efficient cooling. Vibration protection reduces the burden on the operator, allows for a long time without interruption. The fuel system is equipped taking into account the environmental standards, additionally cleans the exhaust gases from harmful compounds. Reducing fuel consumption is achieved by equipping the Husqvarna 236 X-torq chainsaw with an innovative system that cuts fuel consumption by 20%.
Husqvarna 236 Saw Advantages and Specifications
The Husqvarna 236 chainsaw stands out for its versatility, capable of performing a wide range of jobs. This includes both hard work on felling trees, preparing firewood, and work on pruning shrubs, forming crowns of garden trees. For its household class, the model is optimal in terms of price-quality ratio. It is equipped with a productive engine with a sufficient motor resource. Ergonomic design and secure grip ensure comfortable operation and mode switching. Good assembly of the tool prolongs the service life, especially if the instructions for use are followed. In case of serious breakdowns, you can repair the saw yourself by purchasing original spare parts. Also, a high degree of unification of brand tools allows replacement of spare parts between models of the same type.
The rest of the Husqvarna 236 chainsaw has the following technical characteristics:
- Power 1.9 hp FROM.;
- Fuel tank capacity 300 ml;
- Oil tank 200 ml;
- Bus length 35 cm;
- 3/8 inch chain pitch;
- Number of links 52;
- Dimensions 540270282;
- Weight 7.37 kg.
Chainsaw malfunctions Husqvarna 236
According to official statistics, its 5 most vulnerable systems are:
- Grease supply;
- Inertial braking.
Manifestations of malfunctions of the first group:
- The motor does not start or is not stable;
- Runs with occasional crashes;
- Does not keep idling;
- Smokes and does not generate manufacturer-specified tractive effort.
In addition to the above, there is one more problem, which we will dwell on in more detail.
The 38 cc engine generates 1.4 kW of power. The maximum revolutions of the chainsaw at such a load are 9 thousand rpm, and at idle only 3 thousand. Systems working with liquids, fuel mixture and chain lubrication are fully automated for autonomous and long-term operation.
The engine stalls when you press the gas: causes and their elimination
- Clogged fuel filter;
- Depressurization of fuel hoses;
- Muffler malfunction;
- Jamming of the valve in the float chamber due to which the mixture does not flow in full;
- Dirty air filter;
- Failure of crankshaft oil seals.
Elimination of all the indicated reasons is reduced to:
- Cleaning of working bodies associated with liquids or air working environment;
- External examination of the listed parts for problems;
- Replaced old parts with new ones.
An important role for stabilizing the working stroke of the Husqvarna chainsaw is played by the correct carburetor adjustment, which is quite feasible at home.
Chainsaw Husqvarna 236: features, specifications and DIY repair
The Husqvarna 236 X Torq chainsaw is an excellent household tool from the famous Swedish brand Husqvarna. In terms of its technical and functional merits, it is considered the successor of the earlier Husqvarna 137 model.
As a basic analogue, it is not designed for commercial operation in felling and woodworking industries. The ideal areas where this chainsaw found its application are gardening, landscaping, lumber harvesting, repair and construction at the domestic level of complexity. Thanks to innovative technologies, this unit can be operated both outdoors and in closed, unventilated rooms.
Chainsaw Husqvarna 236 unity of sustainability, economy, modern design solutions and the best European traditions of sawmilling.
Practical and convenient assistant for the Husqvarna 236 chainsaw
Husqvarna 236 14 x torq chainsaw which replaced the earlier, but no less popular among users, Husqvarna 137. In this article we will consider the main pros and cons of the 236th, we will figure out for what purposes it is intended. You can also learn about the main malfunctions of this model and how to fix them.
The 236th model of Husqvarna is considered to be quite reliable and, if used correctly, its use does not cause trouble for the owners. In cases where the tool is used and stored incorrectly, the first thing that can fail is the carburetor.
Like all two-stroke chainsaws, the Husqvarna 236 is very sensitive to the cleanliness of the air entering the cylinder. In the event that the owner of the tool does not monitor the cleanliness of the air filter and changes it out of time, the saw’s CPG fails much faster. This is a rather serious problem, the solution to which is to carry out a major overhaul.
For detailed information about the malfunctions of Husqvarna chainsaws, as well as how to fix them, you can learn from the article Husqvarna Repair, which is posted on our website. The article contains information on how to remove the cylinder, what to do if oil leaks or the Husqvarna 236 starts and stalls.
Vladimir. 36 years. Tyumen.
I bought my chainsaw more than 2 years ago. At first I was a little upset, because it seemed to me that it had a little lack of power, but after I visited the service center and adjusted the carburetor on the saw, the engine started working at full and the chainsaw significantly increased performance.
For the entire time of operation in a sawmill, I work on a sawmill, the 236 practically did not break. I change the filters on time and try to keep the saw clean. After every working day, I clean with a compressor. In my opinion, this is what allows you to work without breakdowns.
But there were still breakdowns. After a year of use, I had to replace the starter cord, but I think it’s a trifle. There were also some starting problems, but ended after I replaced the fuel filter. In general, I have not heard that such chainsaws do not start well.
I advise you to use only high-quality Husqvarna oils, because I use them and I am very satisfied. Even to lubricate the chain, I use a special adhesive oil and I noticed that the tire and drive sprocket last much longer than my colleagues who save and fill in used oil from car engines.
I recommend to everyone, the chainsaw is worth the money spent on it.
Another design feature of the Husqvarna 236 is the combination lever with which you can control the position of the choke and stop the engine.
The function is quite useful, according to the manufacturer, it will increase the stability of the chainsaw engine.
Adjusting the carburetor Husqvarna 236
The carburetor Husqvarna 236 differs from the carburetor of previous models only structurally. Its adjustment is carried out in the same way as the carburetor on Husqvarna 137 or 142 is adjusted. In this article, we will not describe in detail how to properly adjust the quality and amount of the fuel mixture in Husqvarna carburetors, because. On our website there is a separate article Adjusting the carburetor of a Husqvarna chainsaw.
Specifications Husqvarna 236
The main characteristic of the Husqvarna 236 chainsaw is the power indicator, the Husqvarna 236 has a power of 1.9 horsepower, which in terms of kilowatts is approximately 1.4. The saw weight is 4.7 kilograms, which makes it possible to use it by women.
The maximum power of the Husqvarna 236 chainsaw develops at 9000 rpm. The volume of the cylinder is slightly more than 38 cm 3, the capacity of the fuel tank is 0.3 liters, and the oil tank is 0.2.
An oil pump is installed on the tool to supply lubricant to the saw chain, which automatically adjusts the supply in proportion to the increase in crankshaft speed. Such a system allows not only to effectively lubricate the rubbing elements of the saw headset, but also to save oil in idle mode.
Your Husqvarna chainsaw comes standard with a 3/8 pitch saw chain with a 1.3 mm groove width and 52 links. If necessary, you can replace the tire and drive sprocket, which will allow you to install the chain with the required number of links and chain pitch.
Pros and cons of using a Husqvarna 236
Any chainsaw has both positive and negative aspects associated with its operation, maintenance and repair. The Husqvarna 236 is no exception. According to real users of this saw, it cuts well, but does not start very well.
Service experts say that the Husqvarna 236 is very capricious in maintenance and repair. This is especially true for the carburetor, which is slightly different from that of previous Husqvarna models.
The 236 is equipped with a Zama carburetor with an accelerating pump, which, if stored improperly, quickly fails.
The problem can be solved by replacing the O-ring, which is installed on the pump piston. Repair kits, in which there are accelerator pump rubber bands, are quite rare on sale and for this reason you have to completely change the carburetor, which greatly increases the cost of repair.
The assembly of the Husqvarna 236 chainsaw is very high-quality, the body parts are well-fitted, there are minimal gaps between them, but the saw is structurally very inconvenient. For example, in order to remove the carburetor, you need to unscrew several screws, remove the control lever and unscrew the rear handle.
How to properly adjust the carburetor on a Husqvarna chainsaw
How to tune the carburetor on a chainsaw Husqvarna Adjusting the carburetor on a chainsaw with three THL screws.
Adjusting the carburetor with your own hands on a chainsaw
Chainsaw carburetor adjustment ensures that the tool operates efficiently at full power with economical fuel consumption. Adjustments should be made with a clean fuel and air filter. For adjustment, there are three screws: for maximum and minimum speed and idle.
Screws H and L adjust the gasoline to air ratio, determined by opening the throttle carburetor. When the screws are loosened, the mixture is enriched and turns accordingly fall, when twisting, the mixture is depleted. Turnover is increasing.
H refers to the maximum speed screw that controls the main jet, L. To the minimum speed screw that controls the idle jet. With screw S, the idle speed is precisely controlled. Sometimes the number of available carburetor adjusting screws is reduced to facilitate adjustment.
Setting the carburetor in two stages. Basic (factory settings) performed when the engine is off. And the ending, released on a hot engine. The exact angular values should be taken from the operating instructions for the particular chainsaw. If the manufacturer’s instructions are not followed, the engine may be damaged.
First of all, it is worth figuring out which adjustment screws are provided in the Husqvarna 236 chainsaw.
The manufacturer equipped the model in question with 3 screws:
- L-screw regulates the jet at low revs;
- The H-screw is used to adjust the jet at high speeds;
- 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. Turning them clockwise, the mixture can be leaner and slower. Performing actions in the reverse order, that is, unscrewing the elements in the opposite direction, the mixture is enriched and the speed increases.
The idle speed is adjusted by the third element. Turning it clockwise, the revolutions increase, and to decrease them, the screw is simply turned in the opposite direction.
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 adjusting screws L, H, T. Sometimes these models have the ability to adjust the idle speed. But as a rule, workers of specialized services and owners of such saws argue that it is not always possible to set up a high-quality Chinese chainsaw right away.
For classic Chinese models, screw L should be released 1.5 turns from the maximum value. Screw H must be loosened one turn from the maximum. Idle speed is regulated in the same way.
Chainsaw carburetor adjustment in Husqvarna
Adjusting your Husqvarna chainsaw
During the break-in period of the Husqvarna 142, 240, 236, 137 chainsaw and other similar models, the carburetor settings are set in such a way that the engine speed is 600−700 fewer from regular workers. In the event that the operating frequency cannot be adjusted using the tachometer, it is not recommended to knock down the factory settings with the H screw.
The manufacturer expressly forbids exceeding the working number of revolutions independently. When, after adjusting the carburetor, the chainsaw chain moves at idle, then by turning the screw T counterclockwise, you need to stop it.
In order to adjust the saw accurately, it must be placed on a flat surface with the bar forward. You also need to warm up the engine at least 12−15 minutes. First, determine the highest idle frequency number. To do this, screw L must be turned clockwise in the chainsaw, and then in the opposite direction. After determining the desired frequency, the same screw is turned counterclockwise from 12 to 25% of its full turn.
Idle speed in the models of this manufacturer is adjusted using a jet with the letter T. Adjustment is made by turning it clockwise until the chain moves. Then turn slightly counterclockwise until the chain stops moving.
The screw H of the chainsaw is adjusted correctly only when the saw does not make a lot of noise when the gas is pressed all the way, and at the same time it does not become heavier with any load.
Experts recommend making an independent adjustment of the carburetor in the model in question, adhering to the following plan:
- First of all, you need to adjust 1 screw, then proceed to the second and only lastly, do the adjustment of the screw responsible for idling.
- Next, you need to determine what are the largest idle speed. To do this, you need to carefully turn 1 screw clockwise. Having found the largest exponent, the element should be rotated by ¼ turn counterclockwise. If, during this operation, the chain continues to rotate while idling, the T screw must be slowly turned counterclockwise until the chain stops rotating.
- Using the screw H for adjustment, it is realistic to change both the power of the unit and the frequency of its revolutions. However, it should be borne in mind that if the carburetor will work for a long time due to the ordinary mixture and at high speeds, this can cause the chainsaw to fail.
- To adjust the screw H, you need to do the following steps:
- Warm up the engine of the unit for 15-20 seconds by selecting the full speed mode;
- Turn on ¼ turn the H-element counterclockwise;
- 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, the process should be repeated again.
The four-stroke sound of the engine will help to understand that the adjustment is made correctly. If the mixture after adjustment is too lean, the unit will make a squealing sound. If the mixture is too saturated, smoke will start to appear from the muffler. If in the arsenal of home craftsmen there is a device called a tachometer, then you can begin to independently adjust the H-screw. Under other circumstances, it is better to seek help from specialists.
- After the first elements are adjusted, you can start adjusting the idle screw, performing the operation in the following sequence:
- After activating the engine, you should carefully begin to turn the screw T clockwise;
- It is necessary to turn the element until the chain of the unit begins to rotate;
- In the next step, 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 number of idle revolutions, the uniform operation of the engine, in all directions, with the necessary reserve of revolutions, during the rotation of the chain will help.
To independently understand that the work was done correctly, it will be possible to operate the engine, which should instantly accelerate and emit a four-stroke sound at full throttle. If the unit starts with difficulty, the engine will not be able to accelerate immediately, the first screw should be readjusted again to enrich the lean mixture.
A chainsaw is a tool that will come in handy in any summer cottage, 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 adjusting the carburetor of a chainsaw due to a past incorrect setting.