Which Gasoline To Pour Into A Chainsaw

A chainsaw is considered the most popular type of hand tool used for working with wood. Unlike electric saws, it is adapted for offline use, which is a convenient, and sometimes the only possible effective way to cut logs and other wood materials in remote areas. To do this, you only need to have at hand the fuel for the chainsaw in the required quantity and know the rules for refueling the tool.

Chainsaw fuel system

Most modern chainsaws are powered by a single-cylinder, two-stroke internal combustion engine running on 92nd or 95th gasoline. Old domestic models must be fueled with an octane rating of 80.

In order to facilitate the design, hand chainsaws are not equipped with a reducer.

The speed of the chain drive is determined by the speed characteristics of the motor, which usually exceed 10,000 rpm. Therefore, the fuel mixture for a chainsaw equipped with a high-speed engine must necessarily contain special motor oils.

The chainsaw fuel system includes:

  • refueling tank;
  • fuel filter;
  • carburetor;
  • hoses through which fuel is mixed with air and further into the engine cylinder.

Which Gasoline To Pour Into A Chainsaw

Fuel filter fixed to the end of the hose lowered into the tank. When the engine is running, an uninterrupted pumping of fuel is provided by a small pump built into the carburetor. To start the engine requires a mechanical pumping of gasoline with an additional device. primer. A special air valve provides protection of the tank from creating a vacuum when the liquid level decreases during operation. Carburetor It is responsible for the correct ratio of fuel with injected air during the creation of the air-fuel mixture, which is fed to the cylinder for combustion. The entire fuel system works in concert with the ignition system in time with the movement of the piston.

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Fuel Requirements

The main component of the carburetor engine fuel is unleaded gasoline. Experimenting with the question of which gasoline to pour into a chainsaw should not be. Its brand must comply with the requirements set forth in the instrument passport and instructions for its use. Violation of this rule may result in:

  • to a sharp decrease in saw power and uneven operation in the case of gasoline with a lower octane rating;
  • overheating of engine elements when exceeding the recommended octane number above the nominal.

Diluting gasoline for a chainsaw with dubious mixtures is strictly prohibited, so you should use the services of the nearest gas station. It must be remembered that in addition to the octane number, automobile fuel has many other indicators that vary depending on the season.

Do not store large stock for a long time. In winter conditions, the engine may not start on gasoline purchased in the summer.

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Oil purpose

Since the two-stroke engine is not equipped with a lubrication system, it is necessary to refuel the chainsaw with a pre-prepared mixture of gasoline with special oil. On domestic models, the brands M8, M12, MGD-14M are often used. Well-known foreign manufacturers of tools insist on the use of oils of their own brand, which are developed in collaboration with leaders in the oil refining industry. But practice shows that replacing one high-quality two-stroke engine oil with another does not negatively affect the characteristics and duration of operation of the equipment.

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According to the method of production of motor oil base, they are divided into:

  • mineral;
  • semi-synthetic;
  • synthetic.

In this list they are shown in order increasing quality and price. Therefore, if you pour synthetic oil for the Stihl chainsaw into the Husqvarna chainsaw, it will not notice the difference.

Rules for the preparation of the fuel mixture

Mix for a chainsaw is recommended to cook directly before starting work. Storing it for more than 10 days can lead to chemical reactions between the additives that make up the oil and gasoline components. This will adversely affect engine performance and exhaust composition.

If the use of the tool is stopped for a long period, the contents of the tank are drained or idled until the motor stops spontaneously.

Dilute the oil in gasoline in the proportion recommended by the tool manufacturer. For different models, the ratio can vary from 1:20 to 1: 100. For the Stihl 180 chainsaw, it is 1:50. This means that for 1 liter of AI-92 gasoline, you need to take 20 ml of oil. Deviation from these numbers may affect the operation of the motor:

  • a decrease in the proportion of oil will lead to mechanical wear of the cylinder and piston;
  • excess oil will cause incomplete combustion of the mixture.

It is strictly forbidden to use oil intended for other types of engines for two-stroke engines, especially mining.

How is mixing

In order not to spend a lot of time on preparatory operations and not to store a large amount of the fuel mixture, it is usually prepared in an amount equivalent to 3-4 refueling chainsaws. Proper mixing can only be done if available. measuring utensils.

Some manufacturers of the tool include special containers with marks of the level of pure gasoline and its mixture with oil.

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In general, you need to take a clean and dry bottle or canister and pour the required amount of gasoline into it using a funnel. After that, dilute gasoline by adding oil to it. Measure it conveniently with a syringe the right amount without a needle. Close the container with a lid and achieve uniform mixing by oscillatory movements. The oils used are painted in bright colors, so the finished mixture will have a shade by which it can be easily distinguished from pure gasoline and confidently refuel in the tank.

How much gasoline does a chainsaw consume

The fuel tanks of most gasoline saws have a volume of 0.3 to 1.0 liters. How often it will be necessary to pour the fuel mixture into a chainsaw depends on the selected brand, engine power and work intensity. At logging and wooden construction professional chainsaws are used, characterized by high power and long term continuous operation. For housekeeping in a village house, in the country, or in the periodic production of wood products, less productive, but light and convenient household models are used. For a professional tool with a power of 5-6 kW, the fuel consumption for sawing logs can reach 3.0 l / h. In less powerful models with an engine of 1.5-2.0 kW, it ranges from 0.6-0.8 l / h.