Gasoline to Oil Ratio for Husqvarna Trimmer

Which saw is suitable for home use?

Husqvarna 236 and 240 – two models for intermittent use (cylinder displacement 38.2 cc): harvesting firewood, pruning trees in the garden, minor construction work on the site. Lightweight and powerful models. 236 – one of the most popular models among private users.

236 and 240 differ only in power of 1.4 and 1.5 kW and a chain pitch of 3/8 “and. 325” 135 and 140 are household saws, suitable for year-round use (cylinder capacity 40.9 cc). Husqvarna 135 is the most popular Husqvarna model.

135 and 140 differ only in the power of 1.4 and 1.5 kW and the equivalent level of vibrations on the handles 2.5 / 3.2 and 3.9 / 3.8 m / s sq..

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 by 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 environment, and if stored in a plastic canister that is not designed for fuel, the gasoline starts to corrode the plastic. A carburetor that is clogged with plastic particles cannot be repaired.

How to find oil gas mix ratio for string trimmer and how to mix fuel

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 phones: 375 17 236 72 22375 29 638 88 72 (velcom) 375 29 628 88 71 (velcom)

Husqvarna String Trimmers – Fuel & Lubrication

375 29 755 67 00 (mts)

Overview of manufacturers of oils for internal combustion engines

Among the manufacturers producing the best two-stroke oils, we can confidently name 2 leaders – these are Husqvarna (Husvarna) and Stihl (Stihl). Companies produce not only conventional mineral oils, but also synthetic lubricants designed for 2-stroke engines operating in severe conditions..

ISO classification

gasoline, ratio, husqvarna, trimmer

This classifier is linked to JASO. Only here the last three classes are taken into account (the first is obsolete) and an additional check of this oil was carried out under real operating conditions.

Dirty and worn chainsaw piston due to improperly selected oil

For the ISO-L-EGB and ISO-L-EGC classes, the FB and FC requirements described for JASO, respectively, are preserved, plus an additional check of the cleanliness of the pistons after use is carried out.

If the pistons have the required surface finish, then the oil confirms its high class, and one of these markings is assigned to it. In the highest class, ISO-L-EGD, based on the JASO FD, in addition to the pistons, the washing effect is assessed.

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What two-stroke engines dislike?

When preparing the working mixture manually, it should be remembered that two-stroke engines do not reach their design working power if the proportions of the fuel mixture are violated. The above condition forces the owner of the unit to comply with the proportions. As practice shows, the use of lawn mowers with an underfilling of the lubricant product, oil starvation of the engine is observed, which does not allow bringing the unit to the rated power.

Excess lubricant prevents the engine from developing the required power. When preparing the working mixture, a reasonable question arises, how much oil needs to be mixed in gasoline. Helps to define the exact standard. It is recommended to fill the trimmer with gasoline according to the following mathematical calculation. If the fuel tank holds 5 liters, 1 liter of gasoline is divided by 50. That is, 100 ml of lubricating consistency is poured into the gasoline for the trimmer mower per 5 liters. The owner of the lawn mower receives the ideal fuel in terms of structural composition.

Choosing engine oil

The oil formulated for a 2-stroke engine must meet the following requirements..

  • The lubricant should create a minimum of ash during combustion. In the standard, it should burn one hundred percent.
  • The lubricant must have good solubility in gasoline and the highest degree of cleaning from various impurities that can cause clogging of very narrow channels of the carburetor.
  • The oil must have the highest anti-corrosion, anti-wear and lubricating properties..

There are certain benchmarks for oils created for 2-stroke engines: TC-W3 and 2T. A grease complying with the TC-W3 standard is used for water-cooled engines (outboard motors, jet skis). 2T oil is used as an additive in gasoline for 2-stroke air-cooled engines (lawn mowers, mopeds, chainsaws, etc.).

MOTUL Outboard Tech 2T Oil

Oils can be green, red or blue in color. This is done so that their presence in gasoline can be easily determined..

When using poor-quality lubricant, the entire piston group of the engine can fail due to the formation of carbon deposits under the piston rings. As a result, they will not be able to compress, and scuffs will form on the cylinder walls. Also, improper lubrication of the bearings of the crank mechanism leads to overheating and, ultimately, to seizure. Important: it is forbidden to use diesel oil to prepare the fuel mixture, since it does not correspond to any of the above parameters..

Adjusting the carburetor of a Husqvarna chainsaw

It is necessary to adjust the standard carburetor of Husqvarna gasoline saws when the engine is unstable at low and high speeds, a sharp increase in the volume of fuel consumed, as well as in case of an arbitrary shutdown of the engine immediately after starting it. Correct adjustment of the carburetor on a Husqvarna chainsaw is only possible if the factory engine of the tool used is in perfect working order..

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The carburetor setting of your Husqvarna chainsaw must be done in this sequence;

  • First, on the saw with the engine not running, turn the bolts H and L clockwise until they stop. Immediately after this, both screws must be turned about a quarter of a turn in the opposite direction;
  • Then you need to start the internal combustion engine of the Husqvarna saw and let it idle for 5 minutes;
  • After that, you need to adjust the stable operation of the built-in motor at idle speed. To do this, the operator must alternately turn the metal screw L in different directions directly until the standard engine starts to work as stably as possible. Immediately thereafter, the built-in screw L will need to be turned about a quarter of a turn directly counterclockwise;
  • If after that the used chain on the standard tire of the Husqvarna chainsaw continues to rotate, then you need to turn the screw T in the direction of or against the direction of the clock hand. As a result, the chain should stop..

After the steps taken, you need to check the work of the household garden tool. A chainsaw with a properly adjusted carburetor will quickly pick up speed directly when the standard gas trigger is pulled and just as quickly lose it when the trigger is released. If this does not happen, then the carburetor setting will need to be repeated..

Chainsaw Husqvarna 235 – model description

This Husqvarna garden tool is a hobbyist model. Its main areas of application are cutting small branches, removing dry and rotten branches, sawing logs, the diameter of which does not exceed 40 cm.

The saw device is based on a reliable 1-cylinder internal combustion engine, all parts of which are pre-fabricated from a metal alloy protected from corrosion and increased friction. For more convenient daily use, the model is equipped with an effective system of instant vibration damping.

The options for this Husqvarna chainsaw include:

  • crankshaft rotation speed at idle / maximum speed – 3000/12000 rpm;
  • the length of the installed bus is 35–40 cm;
  • the pitch of the used chain – 3/8 “.

The model in this hobbyist configuration is equipped with a reliable inertia brake that is inertial every time the chain hits a wire or a protruding nail..

Chainsaw Husqvarna T435 – tool description

This amateur garden tool stands out for its modest weight and small dimensions. The manufacturer has equipped the saw with comfortable rubberized handles, a modified anti-vibration system and a durable muffler with internal chrome walls..

Model parameters include:

  • crankshaft rotation speed at idle / maximum speed – 2900/12500 rpm;
  • the length of the tire to be installed is 25–30 cm;
  • the pitch of the used chain – 3/8 “.

The manufacturer has included a reliable inertia brake that is activated by shifting the lever..

Review of popular models of Husqvarna chainsaws

There are a large number of Swedish brand chain saws on the market today. Each of them is designed to perform specific tasks in the economy, construction or felling. Various design features and parameters of Husqvarna chainsaws allow the buyer to choose the garden tool that will be able to perform the tasks assigned to it as quickly and efficiently as possible..

Chainsaw Husqvarna 339 XP – tool benefits

This household model is designed for simple tasks such as cutting small branches, cutting fruit trees and irregular sawing of logs up to 35 cm in diameter..

The proprietary equipment of the garden tool includes a 2-stroke motor, complemented by a reliable clutch system, electronic ignition and a trouble-free manual starter. For more convenient operation, the manufacturer has equipped the saw with a balanced anti-vibration system..

The options for this Husqvarna household saw include:

  • crankshaft rotation speed at idle / maximum speed – 2800/10000 rpm;
  • the length of the tire to be installed is 30–35 cm;
  • the pitch of the used chain – 0.325 “.

The garden tool stands out for its light weight, which, with the installed saw headset, is 4 kg.

Husqvarna 357 XP Chainsaw – Model Applications

The professional chain saw in this proprietary equipment is equipped with a reliable engine with two piston rings, a chrome-plated cylinder and an improved air-cooling system..

The basic equipment of the garden tool includes a durable inertial brake, a modified anti-vibration system and a decompression valve to supply fuel to the cylinder before starting the internal combustion engine..

Model parameters include:

  • crankshaft rotation speed at idle / maximum speed – 2700/14000 rpm;
  • the length of the tire to be installed is 35–45 cm;
  • the pitch of the used chain – 0.325 “.

The powerful engine of this Husqvarna chainsaw allows you to attach a variety of attachments to the tool, which are necessary for everyday work and construction.

Why the Husqvarna chainsaw won’t start – reasons and repairs

Malfunctions associated with the lack of starting of Husqvarna chainsaws most often indicate a strong clogging of the fuel filter, as a result of which the fuel does not enter the engine cylinder of the tool. To solve the problem, you need to carefully remove the filter element and clean it. If a hole has formed in the filter, then the part will need to be replaced..

If the Husqvarna chainsaw does not start, then this indicates a violation of the optimal clearance between the factory flywheel and the built-in ignition coil of the tool. In normal operation, the distance between these parts should be 0.2 mm. If the gap is more or less, then the spark plug will not be able to form the spark required to ignite the fuel in the cylinder, as a result of which the saw will not start..

The operator will need a gauge of appropriate thickness to set clearance..

Next, you need to proceed in this order:

  • First you need to remove the side cover that protects the ignition system of your Husqvarna chainsaw;
  • There are 2 bolts next to the flywheel. By turning them against the direction of the clock hand, the operator will be able to move the flywheel away from the coil;
  • Next, you will need to attach a template to the existing coil and start turning the screws clockwise;
  • Once the handwheel is close to the template, the screws can be loosened and the side cover replaced.

After the steps taken, you need to try to start the chainsaw. If the clearance has been adjusted correctly, the tool motor will start after 2-3 manipulations with the starter..

Gasoline selection rules

Before buying fuel for your lawn mower, you need to read the manufacturer’s instructions. It lists the grades and grades of fuel that can be used for a particular trimmer model. In general, when choosing gasoline, you need to focus on the A-92 brand. A-95 is also suitable for refueling lawn mowers, 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 lawn mowers, you should choose only high-quality fuel from trusted suppliers.

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Fuel mixture preparation rules

For many newbies who have bought a lawn mower, the issue of diluting gasoline with oil to prepare 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.

In such categories, it is, of course, inconvenient to measure, 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 20

Most often, mineral oils should be diluted in a 1:40 ratio, and synthetic grades should be diluted 1:50. Whereas for budget Chinese lawn mowers, 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 dilution to homogeneity, the fuel must be poured into the fuel tank of the lawn mowers.

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

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

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 (lawn mowers, chainsaws, lawn mowers, etc.) with an engine volume of 50-200 cm³;
  • TD – for engines of boats with liquid cooling.

To select the optimal oil for a particular trimmer model, it is better to take into account the recommendations specified in the instructions. For 2T lawn mowers, API-TB 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 lawn mowers it is best to use Stihl HP or Stihl HP SUPER oil, for Husqvarna 143R it is best to use Husqvarna HP or Husqvarna LS oil. But for the Patriot brand, ordinary mineral oil M-8B is also suitable..

How to properly dilute gasoline for a trimmer

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. In order to choose the right fuel for a particular lawn mower model, you need to know its technical features and understand the brands of gasoline and liquid lubricants. All the details on how to dilute gasoline with trimmer oil are in the material below..

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 lawn mowers. To avoid damage to the trimmer due to insufficient oil or frequent cleaning and unstable operation due to excess lubricant, you should carefully read the operating instructions for the lawn mower and follow it scrupulously..

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 a two-stroke lawnmower cannot be supplemented with oil that is designed for a four-stroke engine or for a liquid cooling system. 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 the two-stroke lawn mower

In ordinary household models, the lawn mower usually uses a two-stroke engine. Lawn mowers do 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 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..

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

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How to properly dilute gasoline with chainsaw oil

The correct ratio of oil to gasoline is not a guarantee of a good mixture. It is important to choose quality ingredients, and in relation to the latter, pay attention to the following requirements:

  • ethanol in it (aka gasohol) is not recommended above a value of 10%, and MTBE (which is methyl butylether) is up to 15%;
  • gasoline should be homogeneous, without inclusions and cloudy sediment;
  • additives, alternative fuel – use is strictly prohibited;
  • octane number, it is, the detonation resistance of the component – not less than 92.

If we talk about oil, then only a specially designed liquid should be used in the preparation of the mixture, otherwise, any device of the mechanism may fail, in most cases – the needle bearing of the connecting rod. Using a branded oil designed for a specific chainsaw (you can find out about this from the information on its label), you will ensure high-quality performance and durability of the mechanism.

So, the following rules on how to dilute gasoline with chainsaw oil:

  • use measuring cups, clean dry containers and graduated bottles;
  • mixing should take place in a separate container, but in no case in the tank of the chainsaw;
  • pour gasoline into the container, and after it there is oil, stirring the total mixture. Otherwise, the oil sticks and lingers on the walls of the vessel and interacts poorly with gasoline;
  • the lubricant label indicates in what ratio the product must be mixed with gasoline to refuel the chainsaw. Popular proportions: 1:33; 1:40; 1:50. The ratios 1:15, 1:20 are less common; 1:25; Feel free to use a twenty-cube syringe when measuring oil;
  • adhere to the rules of how to dilute the main fuel with oil – it is necessary for full-fledged work and your benefit, since an excess of the latter will lead to unnecessary expenses, and its lack will provoke overheating of the system;
  • waste fluids are categorically unacceptable for two-stroke engines. Their use leads to premature wear and breakdown of individual parts;
  • it is important not only to properly dilute gasoline with oil, but also to mix a certain portion, which is supposed to be produced in one working day. Weigh that the fuel cannot stay in the chainsaw for a long time, and the octane number is also decreasing.

How to dilute gasoline for a chainsaw

The specifics of the functioning of a two-stroke engine, namely, this is located in a chainsaw, is distinguished by the need to include oil in the main fuel, gasoline, for the full operation of the entire system. Different units and the motors themselves, as well as the characteristics of liquids, suggest a different dosage, which is why we suggest in this article to consider the procedure: how to dilute gasoline for a chainsaw.

To a large extent, the proportions of lubricant in relation to fuel depend on the manufacturer – Stihl, Makkaloch, Husqvarna or domestic brands, but also on the running-in of the mechanism, its operating power. We will tell you about all the nuances concerning the question: in what proportion to correctly form the fuel mixture, and if you do it correctly, you will be able to avoid many troubles in the operation of the chainsaw.

We dilute gasoline on our own together with the specialists of “Kosi Kosa

So, you already know how to dilute gasoline for a chainsaw, but in order to do everything perfectly, you need to allocate a secluded place for this procedure, clean containers and appropriate liquids: oil for two-stroke engines, clean high-quality gasoline. What kind of oil to dilute is a private matter for everyone, it is important that it be just a motor, not a chain one. You also need to take into account that this fluid should be designed specifically for two-stroke engines..

Do you own a Stihl, Partner chainsaw or a sample of a domestic brand – remember the break-in moment if you use a new unit. Correctly diluted fuel will be one of the main criteria for long-term successful operation. And even if you have forgotten, or have doubts about the components, it is necessary to dilute gasoline with oil in a timely manner and competently, not forgetting to read the instructions once again. How much each ingredient is needed – you can always find out from the labels of the fuel products purchased from us. The shop of gasoline-powered tools “Kosi Kosa” is always glad to offer a quality product, services and advice on the competent operation of lawn mowers.

The right fuel mixture for Husqvarna 2-stroke vehicles

To keep your gas powered tool from malfunctioning, you should purchase branded oil from the same manufacturer. The operating instructions indicate the grades of oil suitable for the preparation of the fuel mixture. When using a different oil, you need to be prepared for the fact that the power and productivity of your tool will significantly decrease.

What kind of gasoline can I use? To prepare the mixture, use only unleaded gasoline with an octane rating of at least 90. Our experienced experts recommend taking AI-92. And this ingredient must be of high quality and “fresh”.

Use only Husqvarna HP branded turquoise oil for all Husqvarna 2-stroke vehicles. The innovative composition of the original oil allows you to extend the life of your two-stroke petrol tool without losing power. The specific color allows service technicians at a glance to determine the correct operating conditions for the device.

Recommended ratio of oil to gasoline. 1:50. For 1 liter of gasoline, add 20 ml of oil. It is necessary to strictly observe the proportions, since an excess of oil will lead to the appearance of carbon deposits on the pistons and spark plugs, and its shortage will lead to an early breakdown of the internal combustion engine. For accurate dosage of ingredients, it is better to purchase a branded Husqvarna combination canister, each compartment of which is equipped with a measuring scale and a separate hole.

The advice of our experts: if you cannot accurately measure the required amount of oil, then it is better to add a little more (22 ml) than less (19 ml). This is due to the fact that a lack of oil leads to an increase in the temperature in the combustion chamber and, as a result, to rapid wear of the piston system..

Remember that all fuel mixture performance will deteriorate during storage! We advise our customers to mix gasoline and oil immediately before working with a gas powered tool. The diluted composition is recommended to be used within a few days. The storage of the mixture should not exceed 2 weeks. And if the storage temperature is 25 ° C or higher, then the period is reduced to 10 days..