How to prepare fuel for a chainsaw

Possible malfunctions associated with the wrong choice of fuel

Incorrect preparation of the fuel mixture dramatically increases the chance of a number of problems. In the best case, the tool may simply not start, but continue to work normally after changing the fuel.

Lack of oil in gasoline often leads to the appearance of so-called scoring. longitudinal scratches on the inner surface of the cylinders. The main problem of such a breakdown is the impossibility of its elimination in any other way, except for the complete replacement of the part. The cost of such an operation is quite high and can be up to 2/3 of the price of the instrument.

The second common problem is the formation of carbon deposits due to the use of low-quality mineral oil or gasoline. The main signs of such a malfunction are a sharp drop in engine power, the appearance of a large amount of smoke, and loud noise. It is quite possible to remove carbon deposits without disassembling the entire motor. This is done through the candle hole.

Ratio of oil and gasoline for chainsaws

How much oil to add to gasoline for a chainsaw is indicated, first of all, in the operating instructions for the tool. If you have forgotten what the proportion of oil and gasoline should be, then you can always open the instructions and update your knowledge. If the instructions are lost, then this material will help you. To begin with, it should be noted that there are several options for mixing oil materials with fuel. Choosing any, it is worth noting that the main criterion for each is the correctness of measuring the components. Only the exact observance of the proportion of oil and gasoline will make it possible to achieve the fuel mixture of the required technical qualities.

One of the most common proportions is 1:50. This means that 1 liter of gasoline must be diluted with 20 ml of oil. Such a recipe for preparing a mixture is relevant for tools whose power exceeds 1.5 kW. This option is one of the most popular, so if you have forgotten the exact proportions for your instrument, then you can always focus on the first option.

The second option provides for a ratio of 1:25. Mixing 1 liter of gasoline with 10 ml of oil is recommended by Chinese manufacturers for their tools. For tools whose power does not exceed 1.5 kW, it is recommended to pour oil in the amount of 25 ml per 1 liter of gasoline. Each manufacturer’s chainsaws have their own restrictions, and recommendations for preparing a fuel mixture, which are recommended to be followed. The above are two main options that are universal.

It is important to know! An excessive amount of the oil mixture in the fuel is also negative, since this will lead to a reduction in the engine resource due to increased shock loads on the cylinder and piston, and will also entail the formation of carbon deposits.

Not everyone knows what kind of gasoline to pour into a chainsaw. This is also indicated in the technical documentation for the chainsaw. In modern saw models, it is recommended to pour fuel of a grade not lower than AI-90, that is, AI-92 or AI-95. And it doesn’t matter who the tool manufacturer is, China or Europe. Professionals recommend using AI-92 gasoline, since in Russia the 95th is in most cases produced from 92 by adding additives. If you know for sure that this is really pure 95, then it is better to use it.

Many craftsmen continue to pour gasoline of grades lower than AI-90 into modern models of chainsaws, as it was allowed to do this for outdated models of tools: “Friendship”, “Taiga” and others. This is not recommended.!

What kind of oil to use to lubricate the chainsaw chain depends directly on the model of the tool. Stihl branded saws and the like produce special lubricants that are intended only for use in such tools. Recommended oils can also be found in the technical documentation. When choosing a lubricant, you must pay attention that it is necessarily intended for two-stroke engines. Oils for mixing with gasoline and for lubricating chains differ in composition, quality and purpose. You cannot mix them, as this will accelerate the failure of the instrument. Recommended oil brands for two-stroke engines:

To make fuel mixture huyosen chainsaw

How to make and store your chainsaw refueling mixture

The main thing to be guided by when preparing the fuel mixture is the recommendations of the tool manufacturers. They are based on extensive laboratory testing and are designed to maximize performance while minimizing the chance of breakdowns.

The peculiarity of the operation of all two-stroke engines, which are used in gasoline-powered tools, is that oil does not come separately to reduce friction of parts, but directly with fuel. Therefore, the fuel mixture should not only consist of gasoline, but also have a slight admixture of oil. Depending on the speed of rotation of the engine, the proportions of the substances constituting the mixture can vary within fairly wide limits:

Scheme for preparing a mixture for refueling a chainsaw in a ratio of 32: 1.

• for engines with a low, about 5000 rpm, rotation speed, the optimal proportions of oil and gasoline are 1:25;
• a gasoline tool operating at a speed of up to 12,000 rpm requires a mixture for refueling, the ratio of the components of which ranges from 1:40 to 1:50.

Under no circumstances should you use oil that is intended for four-stroke engines! When it burns, a large amount of by-products is generated, which quickly clog and disable the engine. When buying, be sure to read the labels on the packaging. Most manufacturers indicate what the oil is for: look for the mention of “two-stroke oil” or “2 stroke oil”. High quality synthetic oil has the following properties:

• dissolves perfectly in gasoline;
• thoroughly and completely lubricates all parts, prevents corrosion and does not freeze when working in the cold season;
• has good fluidity, which is especially important for engines with separate oil supply.

It is not recommended to use AI-95 gasoline for refueling the chainsaw.

A separate topic is the choice of gasoline for refueling a chainsaw. For old models of this tool, which were produced in Soviet times, it is permissible to use AI-76 and AI-80 gasoline, while modern tools are more demanding on the quality of fuel. The most popular brand of fuel used for refueling chainsaws is AI-92.

It is not recommended to use AI-95 gasoline, since it is the same 92nd, but with the addition of various additives that increase the octane number. Firstly, during the combustion of such fuel, a characteristic bloom is formed on the candles, and secondly, the additives simply evaporate from the gasoline over time.

The fuel mixture is prepared in a small metal canister or any other container. In no case is it recommended to use plastic dishes, as they can dissolve in gasoline, while changing its chemical composition. The required amount of oil is poured into the container, after which about half of the total volume of gasoline is added. Stir the mixture thoroughly until the oil is completely dissolved, and then add the remaining gasoline.

Although the finished mixture does not change much over time, it is not recommended to store it for too long. To avoid blockages in the carburetor, after the end of work, the fuel is poured into a canister with a tight-fitting lid.

Chainsaw “Stihl”: which gasoline oil to use?

A number of manufacturers that produce equipment also develop their own consumables that are adapted to the operation of a particular engine. So the Stihl company produces oil exclusively for its equipment. It is equipped with special additives that can compensate for the quality of the fuel, improving lubrication and cleaning of the fuel mixture. It should be noted that Husqvarna HP oil is universal and can be used for all chainsaws. It can be applied at a temperature not lower than 10 degrees.

And also for two-stroke engines, products of the following brands are used: Sadko, Kraissmann, Oleo-mac Prosint. If you use a Stihl chainsaw, how much oil should you add per liter of gasoline? The ratio will be 25 ml of additive per liter of fuel. It must be remembered that there are oils for chains and motors. They are intended for different purposes and are not interchangeable. The use of chain oil for the preparation of a combustible and lubricating mixture leads to tool breakage.

Risks of using fuel and oil surrogates

To avoid premature failure of the chainsaw, it is recommended to refuel the tool with exclusively high-quality and branded consumables. Finding such materials is not difficult, as they are usually sold in branded retail outlets. The use of low-quality gasoline can lead to engine failure, therefore, it is recommended to buy fuel at such filling stations where high quality fuel is guaranteed.

It is categorically contraindicated to mix gasoline with motor oil for cars, since it is not at all intended for such purposes. Compliance with the number of proportions, as well as the use of high-quality materials will extend the life of your tool for many years.

Knowing how to refuel your chainsaw will help you extend the life of your tool and avoid many breakdowns. There are different proportions for preparing a fuel mixture, the choice of which depends on the speed of the chainsaw engine and the peculiarities of its internal structure.

The correct refueling of the chainsaw will help you to protect the tool from breakage.

Refuel the tool only with high-quality fuel, since gasoline with foreign impurities will quickly disable even the most reliable saw.

Saw refueling algorithm

The gasoline / oil mixture is best prepared in a 2.5 liter plastic bottle if you have to refuel the tool frequently. If you need to prepare fuel for just a few fillings, then it is better to use a smaller container. It is definitely recommended to acquire measuring containers, this will allow you to maintain the exact proportions of both liquids. Most oil manufacturers offer such measuring devices.

Initially, fuel is poured into the container, and then oil is added. It is imperative to take into account that there must be enough space in the container to thoroughly mix the fuel mixture.

It is important to know! It is categorically contraindicated to prepare the fuel mixture directly in the tool’s gas tank.

After preparation, it is recommended to store this mixture for no more than 2 weeks. It is recommended to shake the mixture thoroughly with each refueling. If you are not sure that all the fuel will be used up, then it is better not to cook it in large quantities.

Safety precautions when refueling a chainsaw

Refueling the chainsaw should be done with extreme caution: remember that you are working with flammable substances, so any careless action can be fatal. To avoid problems, you just need to adhere to the following rules and tips:

To refuel the chainsaw, you must choose a flat surface.

• for work, prepare a flat, stable surface that is away from sources of open flame;
• position the chainsaw in front of you with the fuel filler neck pointing straight up;
• carefully remove the lid from the tank, if a few drops of old fuel get on the surface, wipe it with a dry cloth;
• insert a funnel into the neck and carefully pour in the required amount of fuel, its level can be controlled through the tank wall;
• screw the cover tightly, if it is equipped with a lock, then it should also be put in place;
• the chainsaw cannot be started in the same place where refueling was carried out, it is best to move away with the tool a few meters.

Some chainsaw models can be equipped with a separate oil tank. In this case, there is no need to pre-mix it with gasoline, since the oil itself enters the mechanism in the required quantities. The oil tank is filled in the same way as the gasoline tank.

Correct proportions

Most often, when preparing fuel for saw operation, proportions of 1:50 and 1:40 are used. This means that for 50 or 40 parts of gasoline, one part of oil is added. Calculations are made as follows: 1 l = 1000 ml, 1000/50 = 20 ml or 1000/40 = 25 ml, that is, in the first case, pour 20 ml into each liter of gasoline, and in the second. 25 ml of oil. If there are no instructions and you do not know the proportions for preparing the mixture, then use the following recommendations:

• Tool and oil from the same brand. For example, for a Stihl chainsaw, the ratio of gasoline to Stihl oil will be the same as indicated on the container with oil, usually 1:50.
• The substances used for the mixture have different brands. a ratio of 1:40 is chosen.
• There is only one brand, but there is no information on the ratios of substances in the oil. they dilute 1:40.
• In the absence of any data on saw and oil, dilute the mixture in a ratio of 1:40. The only thing to make sure that the oil is designed for two-stroke engines.

To run a new saw in the first three refueling of the fuel tank, add 20% more oil. In this case, instead of a ratio of 1:50, it will be 1:42, and the ratio of 1:40 turns into 1:33. A liter of gasoline will require 24 or 33 ml of oil, respectively. No other running-in measures are carried out with the new saw. Manufacturers advise to work only at the highest speed at all times. After running in the tool, use the usual proportions of 1:50 or 1:40. In some cases, the manufacturer of the equipment indicates other ratios, for example, 1:25 or 1:32, they must be observed.

How much oil should be poured per 1 liter of gasoline into a chainsaw

A question for the chainsaw connoisseur

how to find out how much oil to pour on 1 pour if the ratio is 1:25 for a chainsaw. written in oil 50: 1 | Posted by: Artyom

Peter 1:25 is 1 liter of oil for 25 liters of gasoline. Or 0.1 liter of oil for 2.5 liters of gasoline.

Anatoly is written in oil 50: 1. you wrote something wrong

for 50 liters of gasoline 1 liter of oil

Vitaly It is written in oil for “typical”, and once every twenty-five, divide 1000 by 25 in milliliters.

Valentine 1 oil cap 50 gasoline caps.

Nikolay 25 liters 500gr. oils.

Pavel for one liter of gasoline, 25 grams of oil.

Lily pour on up to as much as it is written on the saw. it is a saw aslo and not an oil saw. in order not to save. In our service department, they take 3800 for replacing a piston saw with the most simple saw. And these are about the same in the city. so don’t skimp on oil.

Gennady If the ratio of 50: 1 is indicated on the oil, then without having detailed information about this ratio, it is better to still be guided by the ratio of 1: 25.
A ratio of 1: 25 indicates that 1 part of oil accounts for 25 parts of gasoline.
For simplicity, we can assume that 1 gram = 1 milliliter.
It follows that 1 gram of oil is poured into 25 grams of gasoline.
. 10 grams of oil is poured into 250 grams of gasoline.
. 40 grams of oil is poured in 1000 grams of gasoline. Inna.
Output :
In order for the amount of oil in gasoline to correspond to a ratio of 1: 25, you need to pour 40 grams of oil into 1 liter of gasoline. Larissa.

Nikita You buy a 20 ml syringe at the pharmacy,
20 ml. oil for 1 liter of gasoline.

Yuri, that is, you need to pour 200 ml of Leonid oil into a 5 liter bottle

How to dilute gasoline for a chainsaw? Oil selection, proportions.

1.4.1 Stihl can with oil and petrol compartments, 1.4.2 Husqvarna can with. on requests like “how much oil to pour on 1.2.5 liters of gasoline”. I must say that this is a very handy feature and the price difference between. Gasoline. Oil. Proportions. Dilution aids.

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Why you need to mix oil and gasoline

When using the saw, gasoline should always be mixed with oil. The reason for this is the design features of the two-stroke internal combustion engine. It does not have a dedicated lubrication system for parts (as in other internal combustion engines) and, accordingly, its cylinders with O-rings, crankshaft, bearings and connecting rods must be lubricated directly in the process of obtaining fuel.

How to thin your chainsaw gasoline

Engine power system

As you can see in the photo, the fuel system consists of the following elements:

• Fuel tank;
• Fuel filter that prevents foreign particles from entering the system;
• Carburetor;
• Fuel pre-priming pump.

Chainsaws with a power of 2 kW have a fuel tank that holds about 500 ml of fuel. With this amount of gasoline, they can operate at full power for about 30 minutes, since the consumption is 1.2 l / h. The smaller the tank volume, the less time the saw will work on one tank filling. The oil tank must be filled with the fuel tank. Oil is poured there to lubricate the saw mechanism.

Tool manufacturers Stihl, Husqvarna, Partner, Champion produce special lubricants for saws, which contain impurities that allow them to stay on the chain for a long time. The cost of the proprietary mixture is quite high, so the owners, wanting to save money, use ordinary engine oil instead. Maybe this is not a very good option, but there are no particular negative consequences of such a replacement. The disadvantage can be considered a more significant expense, but comparing the cost, the disadvantage seems not significant.

When comparing the consumption of the fuel and oil tanks, the production of lubricant does not occur as quickly as that of fuel. When the gasoline runs out, very little content should remain in the oil tank. This indicates a properly adjusted system. Any deviations signal that it is necessary to check the operation of the engine and carburetor and, if necessary, carry out repairs and replacement of parts.

Caution. fake!

Small private companies from China and other Asian countries specialize in the production of motor oils, which are sold at a lower cost in the markets under the trademarks of leading manufacturers.

• The characteristics of counterfeit products are an order of magnitude lower than those of the branded originals. The constant use of counterfeit products adversely affects the operation of the chainsaw and the durability of its operation.
• Only an experienced specialist can determine the status and quality of oil, therefore, you can avoid possible risks by buying consumable components in a network of branded and licensed retail outlets.
• The use of substandard lubricants for service specialists is a legal basis for depriving the owner of a faulty saw of warranty repair and restoration obligations.

Benefits of branded oils

Many domestic and foreign manufacturers specialize in the production of special motor oils, but the highest rating indicators are for branded products Stihl, Husqvarna and Makita.

Only in certain parameters are the domestic motor oils of the Lukoil trademark inferior to the branded assortment.

The list of advantages of branded motor oils includes:

• economical consumption;
• stability of performance under difficult operating conditions and during long-term storage;
• minimum amount of toxic compounds in exhaust gases;
• almost complete absence of carbon deposits.

According to the American classification, API-TB oils can be used for work in household and professional models. The Japanese counterpart is JASO-FB and JASO FD. Preparation of a combustible mixture using oil for 4-stroke engines is strictly excluded.

Red, green or any other color of oil determines the product’s belonging to the assortment of a certain manufacturer, therefore, when determining the characteristics of the material, it is not taken into account. Be extremely careful when choosing a motor oil of unknown composition and origin.

Until you receive additional information about the quality and operational parameters, it is better to temporarily refuse to use such material.

It is allowed to mix motor oils of the same type in composition and purpose, produced by brands known for the quality of their assortment. Under no circumstances is it permitted to mix mineral and synthetic oils.

Features of preparation and storage of the fuel mixture

Safety regulations prescribe to dilute gasoline and oil in a metal canister. This eliminates the risk of static electricity and fuel ignition.

Experts advise to pour oil into an incomplete container, mix thoroughly, and then top up with clean gasoline to the specified level. It should be excluded from everyday practice the saving of working time by preparing the working mixture directly in the gas tank of the chainsaw.

This technology is fraught with fuel system failures due to the ingress of a large amount of oil into the carburetor, the need for disassembly and thorough flushing.

Petrol

The main component of the fuel mixture for chainsaw engines is gasoline with an octane number of at least 92. Consumables with expired storage, made on the basis of gas condensate, having water and mechanical impurities in their volume are not suitable for fuel preparation.

• The opinions of experts on the use of gasoline of different brands are ambiguous. On the one hand, the incomplete compliance of domestic A-92 gasoline with European standards is recognized.
• On the other hand, the quality of A-95 gasoline is questioned due to the high content of anti-knock additives. It is possible to use this fuel for the preparation of fuel for a chainsaw only with full confidence in its quality.
• The difficulty lies in the presence of various improving additives, with the help of which unscrupulous manufacturers and distributors increase the performance properties of motor gasoline with a lower octane index.

Also, irreversible changes in the working properties of the fuel occur when it is stored for a sufficiently long time in a plastic container, regardless of the level of its petrol and oil resistance.

Dosage of oil in the Chinese version

Many chainsaws of the Chinese assembly are simplified copies of popular models of European design. The lack of special materials and proprietary technologies contributes to the preservation of the outdated proportion of gasoline and oil in a ratio of 25: 1.

The doubled consumption of engine oil is compensated by its lower cost. According to the developers, original components are introduced into the composition of Chinese oils, contributing to the increase in the durability of power units and the real extension of their assigned resource.

According to independent experts, the quality of the best brands of Chinese motor lubricants corresponds to those of European manufacturers in the middle price range. This is the level of branded motor oils of the Standard group and partially. Super.

How to mix fuel for chainsaw

Measuring containers

To maintain the correct proportion of gasoline and oil, the calculation table printed on the saw body can be used. Branded containers of leading manufacturers of motor oils are equipped with built-in measuring devices that ensure accurate dosage of oil for different volumes of fuel mixture.

Volumetric utensils are included in the factory kit of many models of budget chainsaws. In some cases, a medical syringe with a volume of 20 cm3 will help to dilute gasoline with oil in a given proportion.

The ratio of gasoline to chainsaw oil

Household and professional chainsaws are powered by two-stroke internal combustion engines operating on a metered mixture of gasoline and engine oil adapted to the difficult operating conditions. The correct proportions of oil and gasoline for a chainsaw is one of the important conditions for stable traction characteristics of the engine and low-cost development of its assigned resource.

The need to obtain a sufficiently high power from a small-cube power unit makes it necessary to operate chainsaw engines at high-speed modes, therefore, increased requirements are imposed on the quality of both components of the fuel mixture.

Working proportions of the fuel mixture

The standard gasoline to oil mixture ratio for carburetor chainsaw engines of various models is 40: 1 and 50: 1. This proportion provides full lubrication of the rubbing parts of the crank mechanism and piston group, and also does not prevent the complete combustion of the gasoline-air mixture.

Taking into account external factors, the fuel mixture can be adjusted in the direction of increasing the amount of oil. Such a need arises at the stage of running in a new tool, as well as at high air temperatures. In this case, the standard oil dosage is increased by 20%.

In practice, an increase in the percentage of oil in the fuel mixture is used if its characteristics do not fully meet the stated requirements. How much oil per liter of gasoline is needed in each case is determined by the sawman himself.