What Gasoline To Pour Into The Stihl Chainsaw

Gasoline selection

The first question that the user faces before starting work is what gasoline to pour into the Stihl chainsaw.

Gasoline for the Stihl chainsaw is filled exclusively with unleaded high-octane gasoline, ie, with an octane number higher than 90. If you fill it with low-octane gasoline, it is fraught with engine overheating, piston seizure and engine failure. Therefore, it is optimal to pour AI-92 or AI-95 gasoline into the chainsaw, but here the question of fuel quality arises.

Low-quality AI-92 can “fall short” up to the declared octane number, and AI-95 often contains many additives, and not bringing any benefit to the engine. In addition, if the additives are of poor quality, they do not last long, and after a few days the purchased fuel can turn into low-octane, which is not suitable for a chainsaw engine.

At the same time, a good 95 can harm the piston system. “burn” it. Thus, some users found a way out: to refuel the chainsaw with AI-92 gasoline mixed with AI-95. This achieves an optimal balance between octane number and the amount of additives.

What gasoline to pour into a chainsaw

Everywhere and everywhere they write and discuss issues related to the choice of oil for a chainsaw, someone recommends only the original one, and someone “everything is fine” and on a regular Lukoil 2T! They also raise a lot of questions about mixing gasoline with oil. the process of preparing a fuel mixture for a chainsaw has any more or less human resource. But, no one ever raises the importance of the issue of using gasoline in a chainsaw! Why? After all, all technicians and engineers know how the use of high-octane gasoline affects engines designed to operate on low-octane ones! Chainsaw is no exception!

The proportion of oil and gasoline for the Stihl chainsaw: types of oil, the choice of gasoline and the correct mixing

• 14 March, 2019
• miscellanea
• Svetlana Pavlova

One of the fundamental characteristics of the durability of chainsaws and their high-quality operation is the correct observance of the ratios of the constituent liquids when preparing the fuel mixture. It is known that an insufficient amount of oil leads to excessive friction of parts and their rapid wear, and excess oil leads to the appearance of carbon deposits and engine overheating. This article will discuss the proportions of oil and gasoline for the Stihl chainsaw. This is especially important for beginners who have just purchased a tool.

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.
• In the substances used for the mixture, different brands. a proportion 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 in dust and oil, dilute the mixture in a ratio of 1:40. The only thing to be sure is that the oil is designed for two-stroke engines.

To run a new saw in the first three fuel tank fillings, 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. The second running-in measures are not carried out with the new saw. Manufacturers advise to work only at the highest speed at all times. After running in the tool, the usual proportions of 1:50 or 1:40 are used. In some cases, the manufacturer of the equipment indicates other ratios, for example, 1:25 or 1:32, they must be observed.

Dirty gasoline

Some owners of chainsaws are sure that if the tool works in conditions of constant dust (there is even an air compensator in the carburetor in case of a clogged air filter), it means that it is capable of swallowing gasoline with pieces of rust, and working with small pieces of metal will go to lubricate the chain, so?

How to prepare the mixture?

In order for the equipment to serve for a long time and properly cope with its functions, you need to know exactly how much oil you need to add to gasoline for the Stihl chainsaw. Earlier, we found out that it is better to use a lubricant product from the manufacturer Stihl and unleaded AI92 or AI95 gasoline as components. Leaded fuel grades negatively affect the operation of the unit and disable it. With such components, 20 ml of oil is added to the mixture per liter of gasoline. Any violation of the proportions leads to the appearance of carbon deposits on the spark plugs and pistons, as well as the formation of scoring. The oils used can be green, blue or red.

Their presence is easily determined by the color of the mixture. To dilute fuel, often complete with equipment, a special canister is attached. These containers are marked with graduations and have two holes. The user only needs to fill the tank with the components of the mixture in the required marks, close the lids and mix. Some people use plastic bottles and syringes to measure oil for THESE purposes. In this case, it is necessary to make sure that no foreign particles or water get into the container, all this will worsen the operation of the engine.

How to breed

Stihl Saw Fuel Mix is ​​prepared by mixing high-octane gasoline and two-stroke engine oil. The proportion of oil and gasoline for a chainsaw is as follows: if the power of the unit does not exceed 1.5 kW, then the ratio will be 1:40 (i.e. 25 ml of oil per liter of gasoline), and with a power higher than this value. 1:50 (20 ml for 1 l).

You need to dilute gasoline for the Stihl chainsaw in a separate Canister, in no case do not pour the components into the saw’s gas tank separately. THESE engines have an oil pump and the ability to install it, so only ready fuel is poured into the tank. There are even special canisters with two necks on sale, so that it is more convenient to dilute the mixture, but you can add oil to gasoline for a chainsaw and in an ordinary Canister.

It is better to observe the proportions of refueling the chainsaw as accurately as possible: excess oil will create carbon deposits on the candles and pistons and provoke detonation during fuel combustion. This can shorten the engine life. In addition, the user of the saw in this case is forced to Inhale Exhaust gases from the unburned fraction. At the same time, excess gasoline can damage the pistons due to insufficient lubrication.

Some folk craftsmen, in case of the absence of special measuring accessories, advise using a plastic bottle: a full cap (from the same bottle) of oil is poured into a half-liter container filled with gasoline. The output is an approximate ratio of 1:50.

It is better to calculate the amount of mixture for refueling in advance. Based on the expected volume of work and the declared consumption of this engine. The volume of the tank in most chainsaws is about 0.5 liters, a 2 kW engine will consume approximately 1.2 liters during operation (for more precise characteristics of the saw, see the instructions). Thus, it makes no sense to prepare a mixture in volumes exceeding 3 fillings in a row.

Before starting the preparation of the mixture, it is recommended to thoroughly clean and dry the neck of the canister and the area around it in order to avoid the ingress of foreign impurities: dust, water, etc. so that it does not get into the gas tank, and then into the engine.

Chainsaw characteristics

Every chainsaw has three main elements that make it work. These include a 2-pin carburetor engine and two tanks. One is filled with the fuel mixture, the other is filled with the oil necessary to lubricate the chain. The volume of the fuel tank is 0.25 liters, which allows you to work without stopping for 45-55 minutes. The volume of oil is about two times less. With this ratio of volumes, the contents of both tanks end almost simultaneously.

When operating 2-stroke engines, the oil pump system is not used, therefore, for the Stihl chainsaw, oil must be added to gasoline to lubricate the shaft, piston and other rubbing parts. Attempts to run on one gasoline or non-observance of the proportions specified in the instructions for drawing up a fuel and lubricant mixture of two components lead to tool breakage.

Useful Tips

When calculating the proportions, remember that it is better to pour oil a little than to save on it: only a significant excess of lubricant is dangerous with the formation of carbon deposits, and a slight excess will NOT harm the engine. If his grief, the consequences can be more dangerous.

When mixing fuel for a Stihl chainsaw, the manufacturer recommends that you first pour oil into the canister, then add gasoline and then vigorously mix the components. But practice of use shows that oil can “stick” to the walls of the canister and mix poorly, so it is better to carefully pour oil into gasoline and mix.

It is better not to leave the remains of the fuel mixture in the tank in order to prolong the life of rubber seals and other parts subject to chemical damage. After stopping the saw, the fuel must be drained and disposed of: during long-term storage (more than a month), the octane number and other physicochemical properties of the mixture decrease and it becomes unsuitable for safe use.

In addition, after emptying the gas tank, you need to start the saw engine and let it run at idle speed until it stops on its own. this will mean that the carburetor is also rid of the remaining fuel mixture.

It is important to remember that the long-term performance of the equipment is largely dependent on the user. Saving on fuel in the case of a chainsaw can be much more expensive in the future. by out-of-warranty repairs of a broken saw or by purchasing a new unit. Following the manufacturer’s instructions in most cases helps to understand the principles of the device and prolong its trouble-free and trouble-free operation.

Filling the Stihl MS180 Chainsaw, gasoline and oil.

Chainsaw Stihl MS180 A couple of points in what fluids need to be poured into the chainsaw. Always keep an eye out.

Chainsaw device features

Figure 1. Diagram of the chainsaw device

The chainsaw is a chain hand tool, the cutting body of which is driven by a carburetor engine.

Typically, this is a single cylinder two-stroke engine.

This design is simple, economical, capable of working in any position.

The structure of the saw, in addition to the engine, includes:

• Carburetor;
• Tire;
• Cutting body (chain)
• Starter;
• The clutch is centrifugal type;
• Ignition, fuel supply system, air filters;
• Chain lubrication system;
• Muffler;
• Grips.

The motor can be positioned vertically (heavy duty professional models) or horizontally (light household tools). Heavy-duty saws are used for felling and crosscutting trunks and have a large frame size. Lightweight saws are used for cutting branches or sawing wood, and are usually purchased by private house owners, farmers, gardeners, etc.

The design of the tool is simple, which is a guarantee of high strength and reliability. The engine shaft drives the drive sprocket through the clutch, which moves the chain along the tire using the drive sprocket. The two-stroke engine does NOT need a camshaft, valve system and other elements, which also contributes to increased structural reliability.

The centrifugal clutch is equipped with two clutches, which at low shaft speeds are pressed against each other, and when the rotation speed increases under the action of centrifugal force, they are pressed against the outer part of the clutch and drive the drive sprocket. The power of the motor determines the type of chain. the more powerful the saw, the larger the chain pitch (the distance between the teeth, which determines the performance of the tool).

Engine oil selection criteria

For self-preparation of a combustible mixture, in a metered amount, heat-resistant branded engine oil recommended by the manufacturer is used.

• The specificity of this lubricant is the use in high-speed air-cooled internal combustion engines, which are equipped with household and professional-grade chainsaws.
• Depending on the season, for the preparation of a combustible mixture, engine oil of different densities is used, which retains its working properties as indicated on the temperature range.
• For application Recommended branded oils that provide full lubrication of the piston group and the connecting rod-crank mechanism in all operating modes of the power unit.
• Branded products differ in color. In particular, Shtilev mineral oils are red, synthetic ones are colored green. Husqvarna branded engine oils. blue or green.

Even taking into account the lower cost of mineral oils, it is recommended to use the advantages of synthetic analogues to prepare a high-quality fuel mixture.

Gasoline selection

Many are interested in what gasoline a chainsaw works best on. Most models require clean, high-quality fuel with an octane rating of no higher than 90. Sometimes there are recommendations on the network to mix 92 or 93 gasoline with 95 to increase its efficiency. In no case should this be done, since higher-octane grades are often faked, and no one will dilute the A92 or AI92 grades.

Therefore, when choosing which gasoline to pour into the chainsaw in the domestic market, it is recommended to use just such a fuel. It is necessary to make sure that the gasoline is fresh enough, since during long-term storage in it, the release of resins and other elements that deteriorate quality begins. Manufacturers recommend using:

• Chainsaw Stihl (Stihl) 180. it is better to refuel with gasoline A90 and higher;
• Stihl 250. runs on gasoline with an octane rating of at least 90. Do not use fuel with an ethanol content exceeding 10%;
• Partner. use only unleaded gasoline with an octane rating of at least 90;
• Husqvarna. gasoline with an octane rating of at least 90, it is allowed to use clean fuel or with the addition of tetraethyl lead. Catalyzed engines require a fuel / oil mixture made from unleaded gasoline.

As a rule, the owners of such tools use AI92 gasoline, which fully meets the requirements of manufacturers. However, for most domestic chainsaws, A72 or A80 gasoline is quite suitable. It must also be borne in mind that the failure of the chainsaw due to the use of low-quality fuel is NOT a warranty case.

Which brand to use motor oil?

For each model, the manufacturer advises a list of materials to be used. It is better for the user to adhere to THESE recommendations, because the warranty does not cover tool breakage due to inappropriate fuel and lubricant. In this case, the owner pays for the repair of the chainsaw himself, which can be up to 80% of its cost. When you can’t follow the manufacturer’s recommendations, try to follow these rules:

• Use oil only for 2-stroke engines.
• DO NOT use after the expiration date.
• DO NOT add used oil with a large amount of impurities to gasoline, since the mechanisms of the tool may be damaged.
• Chain lubricant cannot be used for fuel mixture.
• It is preferable to use synthetic and semi-synthetic oils, which are more expensive than mineral oils, but do not form harmful deposits.

What happens if you do not take into account the manufacturer’s recommendations?

In case of violation of the rules for the preparation of fuel and lubricant mixtures and non-observance of the proportions when adding oil to gasoline in Stihl 180 chainsaws; the following problems arise:

• With an increase in friction, the wear of the working surfaces of parts will increase.
• Insufficient lubricant will cause bearings to fail.
• The full functioning of mechanical assemblies is disrupted due to premature wear of parts, their service life is significantly reduced.
• When using low-grade grades of gasoline and oils, the performance of the unit decreases with the subsequent breakdown of fundamental units and parts.

The fuel is prepared before refueling the saw, do not allow excessive contact with oxygen. After finishing work, the remaining mixture must be drained.

What gasoline and oil is better to choose for refueling a Stihl chainsaw: Expanding the question

Gasoline, as well as engine and chain saw oils play a key role in the stability of the tool. Their qualities and properties depend on the durability of the main working mechanisms of the saw, therefore, the choice of fuel and lubricants must be treated with special responsibility. Regular use of high-quality lubricants and fuel is the main guarantee of long-term operation of the chainsaw without unforeseen breakdowns.

How much gasoline is stored

During long-term storage, gasoline evaporates (regardless of the brand), a sediment falls at the bottom, it loses its properties, in other words, it deteriorates. It is worth knowing that the gasoline itself does NOT ignite as much as its vapor. Therefore, if there is a canister of gasoline in the garage since last year, then think whether it is worth it? Better leave it to light the BBQ fire.

The use of “stale” gasoline for a chainsaw entails many problems:

• Difficult start-up;
• Decrease in maximum power;
• Increased wear of chainsaw engine parts.

It is worth remembering that the prepared fuel mixture (gasoline with oil) is stored for no more than a month, after this time it should be disposed of. Using old mixture increases wear on the engine parts of the chainsaw. do not forget about it!

Chainsaw Oil to Gasoline Ratio

Every chainsaw company tweaks engines and base carburettors to work with different amounts of lubricant. Therefore, the proportion of oil and gasoline for your chainsaw may differ slightly.

Most often, when mixing fuel with oil, manufacturers advise using proportions of 1:50, or 1:40. This means that 1 part of motor lubricant must be mixed in 50 or 40 parts of fuel, respectively.

It is quite easy to translate the proportion into a more accessible formulation. For example, 1 liter of fuel contains 1000 ml. If 1000 ml is divided by 40, you get 25 ml. This means that 25 ml of lubricant will need to be diluted for 1 liter of gasoline. The same formula should be used when the manufacturer recommends preparing the fuel mixture exclusively in a 1:50 ratio. To do this, divide 1000 ml by 50, resulting in 20 ml. This means that 20 ml of engine lubricant should be diluted in one liter of fuel.

Things are a little different with Chinese chainsaws. Their manufacturers advise to dilute gasoline for a chainsaw in a ratio of 1:25. This means that owners of Chinese tools need to stir exactly 40 ml of lubricant into 1 liter of pure gasoline. This ratio is due to the fact that in terms of assembly quality and selection of components, these chainsaws are slightly inferior to their Western counterparts. In engines of American, European and Japanese models, the distance between the cylinders and pistons is much less than in chainsaws from China. In this regard, the amount of lubricant required to operate the former. Far less.

Octane number

This is where the fun begins. Can I refuel a chainsaw 95 with gasoline? In all operating instructions for chainsaws, manufacturers indicate in bold type: “Do not use gasoline with an octane rating above 92 for preparing the fuel mixture.” It is understandable, but, apparently, not to everyone, because K. Chainsaws with a burnt cylinder are brought to service centers from time to time!

Let’s figure out which gasoline is worth pouring into a chainsaw and which is not! For all two-stroke engines dust, you need to use 92 gasoline, the tool is designed for it. Filling 95 gasoline, detonation will begin in the engine (push of the piston into the opposite direction), something like a micro blow, which will occur at almost every revolution of the crankshaft. About 98 gasoline, I think everything is clear, the effect will be even stronger, and it will already be mini blows.

What gasoline to pour into a chainsaw

Everywhere and everywhere they write and discuss issues related to the choice of oil for a chainsaw, someone recommends only the original one, and someone “everything is fine” and on a regular Lukoil 2T! They also raise a lot of questions about mixing gasoline with oil. the process of preparing a fuel mixture for a chainsaw has any more or less human resource. But, no one ever raises the importance of the issue of using gasoline in a chainsaw! Why? After all, all technicians and engineers know how the use of high-octane gasoline affects engines designed to operate on low-octane ones! Chainsaw is no exception!

Dirty gasoline

Some owners of chainsaws are sure that if the tool works in conditions of constant dust (there is even an air compensator in the carburetor in case of a clogged air filter), it means that it is capable of swallowing gasoline with pieces of rust, and working with small pieces of metal will go to lubricate the chain, so?

How much gasoline is stored

During long-term storage, gasoline evaporates (regardless of the brand), a sediment falls at the bottom, it loses its properties, in other words, it deteriorates. It is worth knowing that the gasoline itself does NOT ignite as much as its vapor. Therefore, if there is a canister of gasoline in the garage since last year, then think whether it is worth it? Better leave it to light the BBQ fire.

The use of “stale” gasoline for a chainsaw entails many problems:

• Difficult start-up;
• Decrease in maximum power;
• Increased wear of chainsaw engine parts.

It is worth remembering that the prepared fuel mixture (gasoline with oil) is stored for no more than a month, after this time it should be disposed of. Using old mixture increases wear on the engine parts of the chainsaw. do not forget about it!

Summing up

In order for the chainsaw to serve for many years, never fill it with old gasoline, and you do not need to use grade 95 and even more than 98 gasoline to prepare the fuel mixture, only 92. Also, do not forget about the purity of gasoline. no odens!

I hope now you are NOT wondering which gasoline for a chainsaw is suitable and which is not very.