How to thin the Husqvarna grass trimmer gasoline

frequently asked questions when buying a chainsaw

The birthplace of the Husqvarna brand is Sweden. Husqvarna factories, which assemble garden equipment, are scattered all over the world: Sweden, USA, Great Britain, France, Italy, Czech Republic, Poland, Brazil, China, Japan.

Specifically, Husqvarna chainsaws are assembled in three countries: Sweden, USA and China.

The company values ​​its reputation very much and, supplying models to the international market, checks its equipment for operational reliability and safety.

Yes, both high world quality standards and intense competition will in no way allow you to “save” on product quality. You can be confident in your chainsaw, whether it was built in Sweden, the USA or China. if handled correctly, it will last for years.

Chain oil

The headset saw is not lubricated with engine oils. To do this, use a special fuel for the chainsaw, which is characterized by high adhesion to the surface. Chain oil reduces friction and wear on parts that come into contact with each other.

Modern brands of chain saws have a reservoir on the body, in which the chain oil is located, with which the saw head is automatically lubricated.

The device of the gasoline motor for chainsaws

Chainsaws, like most other similar equipment, use two-stroke internal combustion engines. Their main advantage over four-stroke engines used in automobiles is the fact that for 2-stroke engines it is possible to remove power one and a half times more with the same volume. But there are also disadvantages. the oil for chainsaws must be added directly to the fuel tank, which increases oil consumption. As a result, the mixture of oil and gasoline, when burned in the working chamber, turns into oil mist, which settles on the cylinder walls and lubricates the elements of the connecting rod-piston group.

Oil for 2-stroke chainsaw engines is diluted in a certain proportion with gasoline and poured into the tank. When the gasoline in the tank runs out, it is necessary to prepare a new mixture. At the same time, you cannot use car oil in a chainsaw. you need a special oil for two-stroke engines.

How long can the fuel mixture be stored? Do I need to drain the tank after using the saw?

The shelf life of the diluted fuel mixture is no more than a month! The operating instructions may indicate 3 months, but this corresponds to European quality gasoline. Practice shows that exactly 1 month is the optimal storage period for domestic gasoline.

If you do not plan to use your chainsaw in the near future, then the fuel mixture should be drained, and the remaining fuel burned, starting the tool at idle, this should be done: During storage, gasoline evaporates from the carburetor, and only oil remains in it.

The membrane, which is responsible for pumping fuel, sticks and the saw is then difficult for the fuel mixture and gasoline should be in specially designed containers.

Gasoline is a very corrosive medium, and if stored in a plastic canister that is not designed for fuel, the gasoline begins to corrode the plastic. A carburetor that is clogged with plastic particles cannot be repaired.

Husqvarna 128ld trimmer carburetor adjustment carb

If this article did not answer all your questions, you can check out the helpful materials below.

Our consultants will provide you with qualified assistance in choosing a model, contact them by phone: 375 17 236 72 22 375 29 638 88 72 (velcom) 375 29 628 88 71 (velcom)

What gasoline to pour into a chainsaw?

When choosing a suitable fuel, each owner of the tool should start from the brand and country of origin of the model available on the farm. Old domestic saws called Ural and Druzhba are best filled with AI-80 gasoline. It contains exactly those additives that are necessary for the stable operation of unpretentious domestic engines. modern domestic models are designed to operate on 92nd gasoline.

Things are a little different with imported chainsaws. The motors of all these models are designed for more gentle fuel, therefore, German, Swedish, American and Japanese chainsaws must be filled exclusively with gasoline, grade AI-92.

An important role in the choice of gasoline is played by its condition. Many novice gardeners are confident that fuel can be poured into the saw’s fuel tank, which will remain in the canister for a long time. Some believe that the tool already works in conditions of constant dust, and it is because of this that manufacturers have provided a special air compensator in the carburetor, which is triggered when the air filter is worn out.

This opinion is fundamentally wrong. As a result of a long stay in the canister, gasoline loses its main properties, and its composition, depending on the material of the container, is replenished with plastic or metal rust molecules.

Due to a long stay in the canister, gasoline begins to lose its vapors, and it is they that ignite when the chainsaw is started. It is because of this that gardeners are faced with a number of typical problems, including:

  • difficulty starting the motor;
  • a rapid drop in the power of the internal combustion engine;
  • accelerated wear of tool elements.
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To prevent this, you need to regularly use only fresh fuel from proven gas stations. It is best to buy 2-3 liters of gasoline every morning before starting gardening. The use of fresh gasoline will make it easier to start the chainsaw, and will significantly extend its service life.

What gasoline to refuel?

The manual for Husqvarna chainsaws says that you can refuel with gasoline with an octane rating of 90. However, we recommend using AI-92 gasoline. Why 92? Esters are used in AI-95 and AI-98 gasoline as anti-knock additives to increase the octane number.

And AI-95 is generally AI-92 with 5% methyltrebutyl ether (antiknock additive).

Increased in gasoline additives (low-quality) to increase the octane number leads to the appearance of rust on the electrodes of the spark plugs, carburetor jets and “poisoning” of the catalyst, which in turn leads to an increase in fuel consumption.

While AI-92 is a mixture of 92% isooctane and 8% n-heptane. The octane number of isooctane is 100 (it does not give detonation), but n-heptane, on the contrary, provokes detonation, its octane number is 0. AI-92 is ideal for refueling your chainsaw.

What oil to use?

Chainsaws are equipped with two-stroke internal combustion engines, where it is impossible to constructively install an oil pump. That is why a fuel mixture from gasoline is poured into chainsaws and should be for two-stroke engines.

Husqvarna oil is specially formulated for the gasoline used at our filling stations.

The quality standards for two-stroke oils have recently been lowered in the CIS countries, but Husqvarna has not changed the formulation of its oil, which still meets the higher quality standards.

That is why it is mixed in a smaller proportion than other Husqvarna two-stroke engine oil is mixed at a ratio of 1:50 (2%) 20 grams of oil per 1 liter for two-stroke engines from other manufacturers is mixed at a ratio of 1:33 (3%) 30 grams of oil per 1 liter of gasoline.

Fuel mixture preparation rules

For many newbies who bought a brushcutter, the issue of diluting gasoline with oil for preparing a gasoline mixture becomes a problem. After all, you need to know the proportions and adhere to them very scrupulously. The instructions for the product usually indicate in what ratio to dilute the components: 1:25 or 1:32, or 1:40, or 1:50. This means that for 1 part of oil, you need to take 25, 32, 40 or 50 parts of gasoline and mix them.

It is, of course, inconvenient to measure in such categories, therefore it is better to determine, by simple mathematical calculations, how much oil is needed per liter of gasoline. To do this, divide 1 liter, which is 1000 ml, by a known proportion. It turns out the following mixing table.

Ratio Gasoline (ml) Oil (ml)
1:25 1000 40
1:32 1000 32
1:40 1000 25
1:50 1000 twenty

Most often, mineral oils should be diluted in a ratio of 1:40, and synthetic grades 1:50. Whereas for budget Chinese brushcutters, the proportions are completely different. 1:32 or 1:25. This is due to the fact that in low-power models made in China, a different assembly is used, and the distance between the piston and the cylinder is much greater.

Advice! For measuring fuel, it is best to use a graduated measuring container. Even an ordinary syringe is suitable for this.

Further actions have the following sequence.

  • First, you need to pour gasoline into the container (canister), and then add the required amount of oil. If you first pour out the oil, then due to the higher density it will settle on the walls of the container and mix poorly.
  • The next step. the contents of the canister should be thoroughly mixed by means of circular movements of the closed container.
  • After diluting to homogeneity, the fuel must be poured into the mower’s fuel tank.

Important! You should not immediately use the gas tank to prepare the mixture.

You can watch the video for more detailed and visual instructions.

How to properly dilute grass trimmer gasoline

Depending on the trimmer type, they can be filled with a fuel mixture or separately with gasoline and oil. Now there is a huge variety of types of motor oils that are suitable for various equipment, including gardening. To choose the right fuel for a particular brushcutter model, you need to know its technical features and understand the brands of gasoline, as well as liquid lubricants. All the details on how to dilute gasoline with grass trimmer oil are in the material below.

Husqvarna String Trimmers. Fuel & Lubrication

Rules for pouring the mixture into different engines

All of the above is relevant for two-stroke engines. In the case of four-stroke engines, nothing needs to be diluted and mixed. gasoline is poured into the fuel tank, and oil into the crankcase. It is important to know that oil intended for a four-stroke engine or for a liquid cooling system cannot be added to a brushcutter with a two-stroke engine. Otherwise, the entire piston system will be disabled or severe overheating will occur.

Important! For the first filling of a four-stroke engine, no more than 90 ml of oil can be poured into a special tank.

Refueling a brushcutter with a two-stroke engine

In ordinary household models, the brushcutter, as a rule, uses a two-stroke engine. The lawn mower does not need a lot of power and agility, so it is quite suitable for the task at hand. In addition, this engine is much cheaper and simpler, but it is fueled with a mixture of oil and gasoline. Such fuel is poured into the carburetor and fed into the cylinder in the form of oil-gasoline mist. Thus, the oil provides lubrication of all the necessary parts, and in the process of engine operation, it burns out along with gasoline. However, the combustion of this mixture is accompanied by the release of a pungent odor and smoke, which increases the toxicity of exhaust gases.

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Important! For such brushcutters, you need to use a special oil for two-stroke engines, which completely burns out without leaving a burn, and has a low evaporation rate. And so that it mixes well with gasoline, it contains 20% solvent.

Features of refueling brushcutters

Depending on the design of the engine, brushcutters are divided into two-stroke and four-stroke. In the first case, the piston in an internal combustion engine makes 2 strokes in one working cycle, and in the second case, 4 strokes. Differences in the principle of operation of the engine also cause different approaches to refueling the grass trimmer.

Oil selection rules

Engine oil, depending on the chemical composition, is:

  • mineral. made from petroleum distillates and designed for low-power air-cooled equipment;
  • semi-synthetic. is a mixture of mineral and synthetic oils and is suitable for 2T and 4T, as well as for air and liquid cooling;
  • synthetic. made on the basis of esters and can be used in powerful technology, as well as for work in difficult climatic conditions.

Important! Oils for two-stroke and four-stroke engines differ in their ability to dissolve, burn and evaporate. At the same time, in order for the liquid lubricant to differ from gasoline, it is painted in different colors: blue, green, red.

Depending on the API classification, the following groups of oils for trimmer motors can be distinguished:

  • TA. for low-power equipment with an engine volume of up to 50 cm³ and air cooling;
  • TV. for powerful equipment with a motor volume of 50-200 cm³ and an air cooling system;
  • TS. for powerful two-stroke equipment (brushcutters, chainsaws, lawn mowers, etc.) with an engine volume of 50-200 cm³;
  • TD. for engines of boats with liquid cooling.

In order to select the optimal oil for a specific grass trimmer model, it is best to take into account the recommendations specified in the instructions. For brushcutters 2T, API-TV and API-TC oil is usually used.

On a note! In addition, there is a JASO classification for two-stroke engines, and SAE30 is still used for four-stroke engines.

Leading garden equipment manufacturers develop and produce oils for their equipment themselves. Such lubricating compositions most fully satisfy all the technical and operational characteristics of a specific series of trimmers. For example, for STIHL (STIHL) FS 5 brushcutters, it is best to use STIHL HP or STIHL HP SUPER oil, for Husqvarna 143R, Husqvarna HP or Husqvarna LS oil is suitable. But for the Patriot brand, ordinary mineral oil M-8B is also suitable.

Gasoline selection rules

Before buying fuel for your brushcutter, you need to read the manufacturer’s instructions. It lists the fuels and grades that can be used for your particular grass trimmer model. In general, when choosing gasoline, you need to focus on the A-92 brand. A-95 is also suitable for refueling brushcutters, although some experts do not recommend taking fuel with such an octane number. This is due to the fact that at many gas stations in Russia, such gasoline contains various additives and solvents (for example, alcohol). It should be borne in mind that you cannot save in this matter. in order to extend the service life of the brushcutter, you should choose only high-quality fuel from trusted suppliers.

Mixture storage rules

The remaining unused fuel mixture needs a dark, dry area where it can stay for up to 2 months. In general, there are different expert opinions on this matter:

  • for mineral oils, the shelf life is 7-10 days, after which their lubricating properties are lost;
  • for semi-synthetic and synthetic brands, there is evidence that they are stored from 30 days to 2 months.

After a longer period of time, it is recommended to change the fuel to a fresher and newer one.

So, above was described in detail the process of how to properly dilute the gas mixture for two-stroke brushcutter engines. To avoid damage to the grass trimmer due to insufficient oil or frequent cleaning and unstable operation due to excess lubricant, you should carefully read and follow the operating instructions for your lawn mower.

Mixing rules

And now about how to mix the components correctly. However, it would be more logical to start with an analysis of common, but absolutely unacceptable mistakes that many owners of this mowing unit “sin” with. The following actions are considered as mixing errors.

thin, husqvarna, grass, trimmer
  • Adding oil to the fuel already poured into the brushcutter’s gas tank. In this way, a homogeneous fuel mixture cannot be obtained. Perhaps you will succeed if you only shake the grass trimmer for a long time. But it is unlikely that someone will do this, given the severity of the unit.
  • First pour oil into a mixing container, and then add gasoline to it. Gasoline has a lower density than oil, so if it is poured into the oil, it will remain in the upper layer, that is, natural mixing will not occur. Of course, it will be possible to mix later, but it will take much more energy than if it were done the other way around. pour oil into the poured gasoline.
  • Ignoring precise measuring instruments for taking the required quantities of ingredients used. In other words, diluting the amount of oil or gasoline “by eye” is a bad habit when operating motor vehicles.
  • Take empty drinking water bottles for preparation of the fuel mixture. Such a container is made of too thin polyethylene, which can dissolve with gasoline.

Considering all of the above, we recommend using the following rules when mixing the fuel mixture for two-stroke engines of the grass trimmer.

  • Use only clean containers made of metal or special plastic for storage of gasoline, oil, ready-made fuel mixture and its preparation.
  • Use a watering can to pour gasoline into a dilution container to avoid spilling, and to add oil. a measuring container with volume risks or a medical syringe for 5 and 10 ml.
  • First, pour gasoline into the canister for preparing the fuel mixture, and then oil.
  • To dilute the mixture, first pour only half of the planned volume of gasoline into the container.
  • Next, add to the gasoline the entire amount of oil required to prepare the mixture.
  • Mix the contents of the dilution container thoroughly. It is best to stir by making circular movements with a tightly closed container. Do not stir the fuel inside the canister with any foreign object, since it is not known what material this object is made of, what reaction it can enter into with the ingredients of the mixture, how clean it is.
  • Add the rest of the gasoline to the mixed mixture and mix thoroughly again.
  • You can fill the mower’s fuel tank with the prepared mixture.
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It must be borne in mind that the ready-made fuel mixture should not be stored for more than 14 days, as it loses its properties, stratifies and evaporates, which leads to changes in proportions, and therefore a deterioration in the operation of the grass trimmer.

What is the risk of using the wrong fuel mixture

Many users of gasoline-powered tools are quite irresponsible in the preparation of the fuel mixture. For example, I met the owners of saws who diluted gasoline with oil “by eye”. They just poured as much as they wanted, and then came to me with a faulty instrument.

It is important to understand that more, like less, does not mean better. It is the golden mean that matters.

If you prepare a mixture with an oil deficiency, then everything is clear. There will not be enough lubrication for the cylinder and bearings, which means that friction and temperature will increase, scuffs will form in the cylinder and can jam the crankshaft bearings.

What happens if you pour it? A large volume of oil, during combustion, form a lot of residual combustion products that settle on the piston, in the cylinder outlet port and the muffler, making it difficult for the exhaust gases to move. As a result, a drop in power or a complete loss of performance.

Carbon deposits that form with an excessive proportion of oil can settle under the compression rings, preventing them from compensating for the thermal expansion, which will lead to scuffing, in general, the consequences can be quite serious.

Consequences of violation of the ratio

The service life of the motor scooter engine depends on how accurately you follow the manufacturer’s recommended oil-gasoline ratio. The fact is that the fuel mixture enters the cylinders in the form of gasoline-oil mist. And the task of the oil composition is to lubricate the moving and rubbing parts and surfaces of various parts in the cylinder. If it suddenly turns out that there is not enough oil, and somewhere it will not be enough at all, the parts that touch dry will begin to damage each other. As a result, scuffs, scratches and chips are formed, which will certainly lead to complete or partial engine failure (for example, it can jam).

In the opposite case, when too much oil enters the engine, it does not have time to completely burn out, settling on the cylinder walls and turning over time into solid particles. coke, slag and the like. As you might guess, this also leads to engine failure. The most important thing is that you must not allow even a single violation of the proportion in the direction of a lack of oil. It is better to pour a little oil 10 times than not to add just 1 time. It often happens that this time is quite enough to break the engine.

Gasoline for grass trimmer

Gasoline grass trimmers are ideal for site maintenance thanks to their portability. These models of lawn mowers require periodic fuel changes. The choice of gasoline must be approached competently. It is not worth saving much on the purchase.

Why you need grass trimmer oil

The piston of a two-stroke engine makes a stroke every second stroke, the gasoline burns out, and the lubricant diluted in it covers the cylinder. With the help of compression, without any special mechanism, combustion products are eliminated. Therefore, small motors have proven themselves well in household equipment such as mower trimmers. These components must be diluted for the following purposes:

  • Oil mixed with fuel lubricates the friction elements. piston and cylinder.
  • While it settles on them, contributing to better friction, the fuel burns.
  • If there is no such lubrication, the cylinder may be damaged, up to the point of seizing.

In excess, the lubricant undergoes thermal modification, creating unwanted deposits in the annular grooves. This threatens with loss of compression, and hence the power of the grass trimmer. To prevent this from happening, you need to know the proportions. how much to fill in one and the other liquid.

Filling the grass trimmer

Gasoline for four-stroke engine

Devices with a four-stroke motor are more complex. Oil and gasoline are poured into different containers, from where they are then fed to the engine. For a mower with such a motor, you need AI-92 and AI-95 gasoline. It is better not to use fuel with a lower octane number, because this will lead to unstable engine operation. In addition, do not use a lubricant designed for two-stroke models.