Oil proportions for two-stroke chainsaw engines

Gasoline for a chainsaw: oil proportions and ratio per 1 liter, how to fill and how to dilute correctly

Oil is specially dyed in bright colors to change its color when mixed with fuel. Thanks to this you can see if lubricant has been added to the gasoline.

Low-quality oil can lead to rapid wear of the entire piston group of the motor. The released soot will not allow the rings to compress and the crankcase will form a hitch. Bearings can overheat and seize because of low-quality lubrication. It pays to follow our recommendations and choose only high-quality lubricants and your saw will last.

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How to extend the life of a chainsaw?

proportions, two-stroke, chainsaw, engines

A chainsaw will be technically serviceable under one condition:

When buying a tool read the manual and manufacturer’s recommendations for use in detail.

Strictly adhere to and follow the instructions for the selection of components to form a combustible mixture of gasoline and recommended oil.

Do not use any oils designed for use in motor vehicles to form the work product. This is strictly forbidden.

In order to make your chainsaw work for a long time and not to cause repair problems, you need to prepare the fuel mixture correctly. Internet forums are full of questions on the subject. We interviewed experts and compiled a brief instruction.

To prepare the fuel mixture, use gasoline AI-92 or AI-95. A lower octane rating will not work. Always use lead-free gasoline (otherwise the engine will be damaged) and not old (the octane rating may change over time). Do not use oil for boats and four-stroke engines.

Gasoline and oil should be mixed in strict proportions. Choose an API-TB or API-TC synthetic air-cooled two-stroke oil. Do not skimp on ingredients. Ask for the brands that offer the best quality in the stores. Use of oils for boat and four-stroke engines is prohibited.

The key question is the proportions. Excessive oil will cause soot deposits on pistons and spark plugs. Using too much gasoline leads to burrs on the pistons and engine damage. Mix on average one liter of gasoline with 20-50 ml of oil. STIHL and Husqvarna, for example, recommend taking 100 ml of oil per 4 liters of gasoline. The above ratio is ideal for chain saws up to 1.5 kW. Use a 1/50 ratio for chainsaws of the same brands for powers over 1.5 kW (100 ml oil to 5 liters gasoline). Recommendations from Partner and Jonsered: Proportion 1/33 (3.3 litres/ 100 ml petrol). Super-synthetic oil is added at a rate of 100/1. Figures are approximate. Always use the information listed in the manual for your particular chainsaw model. Give less credence to the figures on oil labels.

What to mix in? You can buy canisters with measuring divisions and two openings for oil and gasoline. Pour the ingredients, screw on the lids and stir by tilting the container.

Many use glass and plastic bottles, baby horns and syringes. Be careful with glass and plastic, beware of static electricity. Make sure there are no particles or water droplets in the mixture. Always mix the mixture thoroughly.

You cannot store the fuel mixer for more than 25-30 days.к. The oxidation process changes its composition. Engine failure caused by overmixed fuel is considered nonwarrantable. The repair costs up to 80% of a new chain saw. At the end of the cutting season use up the remaining fuel, shut off the engine, remove the fuel mixture.

secrets of 2 stroke engines oil x gas mixture

Remember, your goal is to create a mixture that will ensure smooth engine operation, complete combustion without fouling, smoke or scuffing.

At the heart of chain saws from different companies is a two-stroke internal combustion engine that drives the cutting headsets of the tool. Gasoline and chainsaw oil proportions are used to power the engine. Combining gasoline with oil is a mandatory procedure, so if you just bought the tool, you need to understand the peculiarities of its fueling.

Oil to gasoline ratio for fuel mixture

The oil and gasoline ratio for a chainsaw is usually made up of two recipes:

If you have recently purchased a chainsaw and have not yet used it, increase the proportion of lubricant by one-quarter. The same amount of it is poured into the fuel, leading sawing at temperatures below 2 degrees.

It is not hard to get a mixture like this. Almost every modern saw is equipped with a special dual-mix tank. Oil is poured in its smaller part and petrol in its larger part. Lids of both parts are tightly screwed on and the container is inverted, shaken thoroughly. This achieves complete and homogeneous mixing of the two components.

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If there is no such special container, you can use any gasoline-resistant plastic container with a cap of one liter and a disposable syringe of 5-10 cc. The gasoline container must be cleaned of any contaminants and water before filling. After that one liter of 92-95 gasoline is poured into it.

At the same time fill up 20 ml of oil in a syringe. If it is refueled in cold weather, it should be taken 24-30 ml. Carefully pour it into the container with gasoline. It is closed tightly with a lid and shaken thoroughly until the components are fully mixed.

All operations on preparation of the fuel mixture should be carried out in the open air outside living quarters. In addition, it is important to strictly comply with fire safety measures!

How to dilute gasoline for a chainsaw

Let us consider how the mixture is prepared for a chainsaw. It is necessary to calculate the correct ratio of gasoline and oil for the chainsaw. For gasoline saws take fuel with a high octane rating: AI-92 or AI-95.

To prepare the fuel mixture, you need to add 30 g of oil to 1 liter of gasoline, which corresponds to the design of the saw. The resulting fuel liquid is poured into the fuel compartment. Before you dilute gasoline, you should get advice from specialists at a service that specializes in chainsaw repair.

In order for the saw to have a long service life, it is necessary to properly prepare a gasoline-oil mixture, for which only brands AI-92 and AI-95 can be used. The fuel must not be leaded, otherwise the internal combustion engine can break down. Do not use old and expired products, because they can change the octane rating over time. Adjust the lubricant to the correct proportion of fuel.

Do not save when choosing oil for chain saws of Husqvarna brand and others. It is necessary to observe the proportion, because the surplus of oil can cause the growth of carbon deposits on chain saw’s nodes. Adding too much gasoline can cause piston damage and engine damage. So, 1 liter of fuel is mixed with 20-50 ml of oil. Husqvarna recommends adding 100 ml of oil to 4 liters of gasoline. This ratio is good for saws with up to 1.5 kW.

For constructions with power over 1.5 kW use 1:50 oil proportion. It means that it is necessary to dilute gasoline in the following way: 5 liters of gasoline for a gasoline chainsaw should be added to 100 ml of oil. Partner recommends that you add 100 ml of lubricant per 3.3 liters of fuel when fueling your chainsaw, as follows.

When using supersynthetic oils the figures are 1:100. That is, the fuel mixture for a chainsaw must be prepared according to the recipe: add 100 ml of lubricating liquid to 1 liter of fuel. When selecting components, you should use the information that is given in the manual of any modification of the saw.

Let’s consider in which container you can mix fuel. In stores, there are canisters with measuring divisions that have 2 openings: one for fuel and one for lubricant. Using such a canister, you should pour both ingredients, screw on the caps and mix the substances by tilting the canister in different directions.

Plastic bottles and other containers are often used to mix ingredients. Be careful with plastic and glass. Static electricity can build up when mixing ingredients. Make sure no pebbles, sand, or water drops get into the fuel mixture. The fuel mixture should be well mixed. The prepared fuel mixture must not be stored for more than one month, because oxidation of materials may occur and the composition of the mixture may change.

Engine failure, which was caused by expired fuel, is recognized as non-warranty in the services. In this case, the cost of repair can reach 80% of the price of a new construction.

After you have finished all your work with the chain saw, it is time to use up the remaining fuel and disconnect the engine and remove the remaining mixture.

For the best operation of the device, it is necessary to make a mixture that will ensure the smooth operation of the motor, complete combustion of the gasoline-oil mixture without causing fouling, smoke or damage.

The lubricant of the engine parts can provide proper operation of the factory mechanism only if it meets certain requirements.

  • the ability to lubricate parts. the composition must create a uniform oily film, which will penetrate into the smallest grooves of the engine, as well as prevent friction of ICE elements and the effects of high temperatures on them;
  • Smoke formation. a quality lubricant should not smoke. If black smoke comes out of the chainsaw muffler, it means that the engine lubricant must be replaced;
  • no fouling. during operation the oil must not form fouling, which, deposited on the walls and the carburetor and muffler, reduces their performance and life;
  • Washing properties. at the same time as keeping the engine running, the chainsaw engine oil must clean the walls and engine parts from accumulations of tar and dirt;
  • ability to operate at extremely low and high temperatures. a quality product for lubricating engine parts should not freeze in the cold or boil under direct sunlight. It is best to choose compositions that are able to work in the range of.20 to 40 ⁰C;
  • Corrosion protection. if the chainsaw is operated in humid conditions, condensate inevitably permeates the engine and causes rust. Engine oil should protect internal combustion engine components from rust. To do this, it needs the appropriate additives.
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An important role in self-selection of engine lubricant is played by its type. Mineral and synthetic oils are the most common on the market. The first type has a less well-balanced formulation. lacking most of the useful additives. Synthetic oil is more popular, because it protects engine parts from wear, corrosion, and fouling more reliably. That is why synthetic oil is more expensive than mineral oil.

There are a number of oils that are popular with both regular users and experienced woodcutters.

What mix oil to use! What ratio should I run in different saws!

  • STIHL HP lubricant is very stable and reliable in all weathers. The oil resists corrosion well and has little or no smoke. The product contains all the necessary additives for the engine, including components that prevent the formation of carbon deposits;
  • STIHL HP Ultra. belongs to the group of top-class oils. Excellent lubricant and good resistance to wear and corrosion. Its composition includes ashless additives, which guarantees the absence of carbon deposits on the carburetor and muffler;
  • Husqvarna HP. the product of this brand is distinguished by the presence in its composition of additives intended to compensate the bad quality of used gasoline. Lubricant is made on a semi-synthetic basis and has a high resistance to corrosion.

When selecting oil for 2-stroke chainsaw engines, it is important to study the shelf life of the oil in advance. You must remember that high-quality lubricant will not last more than 5 years, even if it is kept in a closed container. That’s why it’s best to buy products with a shelf life of 2-4 years.

What gasoline is suitable for a chainsaw?

Older models of Russian chainsaws normally run on gasoline A-76, but for chainsaws manufactured abroad, it is better not to use this fuel, and fill the tank with a high-quality gasoline, such as A-46, for example, to reduce the fuel consumption.92. But here the question may arise about the quality of the very gasoline, which is purchased at gas stations in the country, because it often does not correspond to the declared composition. In order not to risk it in vain, some owners of imported chainsaws buy 95 gasoline.

It is also not advised to use fuel that has stood unnecessarily for a long period. The fact that gasoline can lose its main characteristics over time. For example, the octane number is of great importance in the composition of gasoline, if it decreases, the operation of the saw may lead to a decrease in engine power.

A chainsaw can become non-functional due to the use of low-quality fuel. Sometimes such a mistake is very expensive for the owner, because the repair of the failed mechanism costs much more than fresh and expensive gasoline.

Preparing the fuel mixture: the proportion of oil and gasoline for a chainsaw

The chainsaw engine is the “heart” of the tool, so it is very important to use a properly prepared fuel mixture.

The fuel mixture for a chainsaw is made of two components. oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (as in a four-stroke engine), but directly to the gasoline. It is very important to observe correct proportions of ingredients and, of course, not to try to work with pure gasoline, because that way you will “kill” the chainsaw very quickly.

The oil must be intended for two-stroke engines of gardening and forestry machinery (that means you must not use oil for boat motors or scooters in any case). As practice shows such oil can be bought in any store or service center, where chainsaws are sold or serviced.

If we talk about what gasoline pour in a chainsaw, it is optimal to use fuel with an octane number of A-95, in this case, the savings on fuel can turn out badly. European manufacturers often indicate that you can use gasoline A-90 or A-92, but in post-Soviet countries, the quality of gasoline is inferior to European, so in our realities it is better to use higher-quality gasoline.

As for the petrol-oil mixture proportion itself, everything is simple: you need to clearly follow the instructions of the tool. All chainsaw manufacturers indicate the required ratio in the instruction manual or in the tool’s certificate, moreover, the proportions for filling a chainsaw may differ depending on the model of the chainsaw. As a rule, the oil and gasoline ratio in a chain saw of the famous manufacturers is 1:40 or 1:50, which means 1 part oil in 40 parts of gasoline, for example.

Now for the arithmetic: 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and you get 25 ml of oil. If we perform the same actions to the ratio 1:50 we get 20 ml of oil per 1 liter of petrol.

As for budget chainsaws made in China, the situation is a little different. Gasoline to oil ratio for chainsaw made in China 1:25, so you divide 1000 ml of gasoline by 25, then you get 40 ml of oil. the thing is that in branded chainsaws solid build and the distance between the pistons and cylinders in the engine is much smaller than in Chinese chainsaws, so the required amount of oil is almost twice as different.

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In order to measure a correct portion of oil, use an ordinary medical syringe of sufficient volume.

One more thing to be careful with. pour the gasoline in the dry gasoline canister first, then the oil. The procedure on the contrary is fraught with low-quality fuel mixture, because oil is denser, it will stick to the bottom of the canister. That is why good blending is out of the question.

Always prepare fuel mixture in a canister and fill up the gas tank with already prepared special fuel! Never mix or blend fuel directly in the gasoline tank of the chainsaw!

If the question of how to dilute gasoline for gasoline saws figured out, then the about storage conditions and expiration date of the fuel mixture it is worth saying a few words. It is best and easiest to prepare a petrol-oil mixture for 1 liter of gasoline, it is recommended to do it just before working with the tool. Fuel tanks in chainsaws have a capacity of 0.3 to 1 liter. In home use the entire volume of the fuel mixture is seldom used in one go, and the remainder can be saved until the next use. It is necessary to store the fuel mixture in a special canister for gasoline, in a dry, dark place. It is optimal to calculate that the mix is ready to be mixed and stored for 7-10 days

The point is that now the oil on the market is not synthetic, but organic. After 10 days all lubrication properties are gone, gasoline simply “eats away” the oil. Naturally, you can no longer use such fuel, it can cause a breakdown and failure of the chainsaw.

At the end of the work it is necessary to drain the fuel mixture and start the chainsaw. the tool will stall (so that the saw has a dry carburetor) and now you can leave it until the next session of operation.

If you have a dacha or a rural home, a chainsaw for you need. How to dilute the gasoline for a chainsaw? For gardening needs, a household chainsaw is completely sufficient. Its power is small, but it is completely sufficient for removing old branches of trees, sawing wood and boards. Such a saw does not have a very huge weight and size. If you need to saw trees on the site or you plan construction work, it is better to buy a semi-professional chainsaw. Its work time should not exceed 8 hours a day. Prof chainsaw has very high power and can work up to 16 hours in a row. For the production of such saws, durable materials are used, and the implementation asks for certain abilities. Professional chain saws are used in felling on an industrial scale and for other similar jobs.

All of these types of saws differ in both power and weight. If you’re not planning on doing a lot of permanent work, it’s better to limit yourself to a household chainsaw, which weighs much less and is therefore easier to handle. Professional saws, on the contrary, have a power up to 6 kW and, accordingly, a huge weight. How to dilute gasoline for a chainsaw? Choice of oil. The choice of such a saw is dependent on the thickness and strength of the material to be sawn.

What oil to use

Customers can choose from a wide range of chainsaw oils in our store. They have different specifications, manufacturer, price policy, etc.д. As a result, their effect on the performance of the equipment is different. So in addition to the question of how to fill a chain saw, the urgency of another became about what oil to use to achieve the optimum lubricating effect of all elements of the engine system.

Oil color

Depending on the manufacturer and the characteristics, you can find oils of the following colors:

However, the shade of the fluid has no effect on the characteristics and functionality of the oil. The main task of color to identify a particular manufacturer from the crowd. That is why you can pour any shade of oil into the gasoline. At the same time, it is recommended to refrain from purchasing products that cause concern due to unknown composition or manufacturer.

Mineral or synthetic

Qualifying oils into several types can be distinguished type products:

  • Synthetic. They are very stable under all weather conditions and retain their structure and consistency. have a lower volatility and higher antifriction properties.
  • Semi-synthetic. Mixed type, which is obtained from the proportion of 30 (synthetic) to 70 (mineral). Therefore, the quality of such a lubricant element is at an average level.
  • Mineral. The disadvantage of such oil work only in warm climates. In the strong cold, the mixture quickly solidifies, adversely affecting the work of the tool.

However, experts recommend using either mineral or semi-synthetic oil for two-stroke engines. They have stable characteristics and low price. However, before selecting the optimal oil, it is important to consider the further conditions of the chainsaw‘s operation. So, for example, for home use it is better to opt for a mineral or semi-synthetic oil. For work at industrial facilities on a larger scale and in harsh climatic conditions, the purchase of synthetic lubricant for chainsaws will be optimal.

Another factor is the characteristics of the equipment and manufacturer’s advice.

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