What Gasoline To Refuel A Chainsaw

Review: Which gasoline should I use 92 or 95? Refueling your chainsaw

For beginners, the question of how to refuel a chainsaw is especially relevant. However, the refueling process itself is not at all difficult. The main task is to formulate the fuel / oil mixture in the correct proportions. They are indicated in the instructions for the tool. Before refueling, you should carefully study the information given by the manufacturer in order to exclude the possibility of errors in the composition of the fuel mixture.

Oil selection

The chainsaw uses two types of oil. motor oil and chain (adhesive) oil. They should not be confused because the tasks they perform are different from each other. Any gear oil can be used to lubricate the chain, although manufacturers always recommend using the same materials. Engine oil requirements are stricter. On this issue, all manufacturers are unanimous. you should use the oil of the same company that made the saw.

Two-stroke engines lack a lubrication system that is replaced by the presence of some material in the fuel. The carburetor injects a fuel-oil mist, which simultaneously lubricates all parts. The residues are then burned off in the cylinder. If there are no specific instructions in the instructions, any two-stroke oil can be used.

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For different tool models, manufacturers recommend:

  • For the Stihl 180 chainsaw, the best option is STIHL HP, HP SUPER or HP ULTRA oil;
  • Stihl 250. use STIHL HP, HP SUPER or HP ULTRA correctly, STIHL HP ULTRA is the most effective;
  • Partner. any two-stroke oil. Do not use automotive or marine oil, it will damage the engine;
  • Husqvarna. Manufacturer recommends the use of HUSQVARNA two-stroke oil. Do not use oil for 4-stroke engines or water-cooled 2-stroke engines.

Important! Not all types of oil are commercially available, so sometimes you have to change them to other available types. The most successful option is the use of synthetic high quality materials.

Fuel mixture preparation rules

It is recommended to prepare the mixture for the chainsaw immediately before starting work. Storing it for more than 10 days can lead to chemical reactions between the additives that make up the oil and the components of gasoline. This will negatively affect engine performance and exhaust gas composition.

If the use of the tool is stopped for a long time, the contents of the tank are drained or triggered at idle until the motor stops spontaneously.

Dilute 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 can affect the operation of the motor:

  • A decrease in the proportion of oil will lead to mechanical wear of the cylinder and piston;
  • Excessive amount of oil will cause incomplete combustion of the mixture.
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It is strictly forbidden to use oil intended for other types of motors for two-stroke engines, especially working off.

Chainsaw device

What Gasoline To Refuel A Chainsaw

Each chainsaw has different technical data and can do different work.

Powerful saws are suitable for felling centuries-old trees, small-format chainsaws are more suitable for various tasks in the home garden:

Chainsaw standard blocks:

  • Power point.
  • Clutch.
  • Ignition block.
  • Carburetor.
  • Fuel block (oil and fuel tank).
  • Filters for cleaning incoming air.
  • Starter.
  • Chain.
  • Tire.
  • Chain brake.
  • Tension mechanism.
  • Chain lubrication element.

Each chainsaw requires high-quality fuels and lubricants, it is they that ensure long-term productive operation of the unit. What gasoline for the chainsaw to fill, in what proportions?

For domestic chainsaws, simple oils are suitable, foreign chainsaws need more complex fuel mixtures that have been thoroughly cleaned.

Chainsaw fuel system device

Most modern chainsaws are powered by a single-cylinder, two-stroke internal combustion engine that runs on 92 or 95 gasoline. Old domestic models must be refueled with 80 octane fuel.

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In order to facilitate the design, hand-held chainsaws are not equipped with a gearbox.

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

Chainsaw fuel system includes:

  • Refueling tank;
  • Fuel filter;
  • Carburetor;
  • Hoses through which fuel is supplied for mixing with air and further into the engine cylinder.

The fuel filter is attached to the end of the hose that is lowered into the tank. With the engine running, a small pump built into the carburetor provides uninterrupted pumping of fuel. To start the engine, a mechanical pumping of gasoline is required with an additional device. a primer. A special air valve protects the tank from creating a vacuum when the liquid level drops during operation. The carburetor is responsible for the correct ratio of fuel to the forced air during the creation of the air-fuel mixture, which is fed into 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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