What kind of oil to mix with petrol for a chainsaw?

How to fill a chain saw with fuel

Knowing the ratios of the preparation of gasoline-oil mixture, you can begin filling it. The instructions for refueling are as follows:

  • The mixture must be prepared first. After combining the two main components, stir them thoroughly
  • Place the tool on a clean and flat surface. Before unscrewing the gasoline tank cap, you need to clean or blow out sawdust, dust, and contaminants
  • The fuel filler neck must point up
  • Putting a small watering can in the throat and then pouring in fuel
  • Control the filling process, because the volume of the tank is small and it fills up quickly
  • Fill not up to the full maximum, because when you close the tank lid, the remaining fuel will splash out
  • After filling up the fuel tank, it is time to add lubricant to the chain immediately
  • Consumption of fuel and chain lubricant is about the same, so you need to fill both tanks at the same time
  • After refueling, you can proceed to start the motor

It is better to start the engine not in the place where the refueling was done, but move to a distance of 2-3 m. The tool is ready to go and you can start it up. How to start the chainsaw engine, you can read in this material (link).

How much gasoline to mix with chainsaw oil

The heart of any chainsaw is a two-stroke internal combustion engine. Its performance, reliability and durability depend on the fuel you use and regular servicing.

One of the essential differences between two-stroke internal combustion engines of a chainsaw and four-stroke engines, such as car engines, is the need to add oil directly to the gasoline for the chainsaw in the gas tank, not in a separate oil system. It is very important to observe strictly defined proportions of gasoline and oil, otherwise a chain saw breakdown is unavoidable. Strangely enough, but this rule is not observed by all. Many chainsaw owners start experimenting with the proportions or don’t fill up the lubricant at all to save money. And the result is serious problems that cost more to fix than just buying a lubricant.

How the quality of lubrication affects engine durability

Now let’s talk about how exactly the oil quality affects the operation of the engine and its life, t. к. many people don’t understand this.

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The principle of operation of the two-acting engine implies that the lubrication of its internal parts is achieved by oil in gasoline. The bearings of the crankshaft and connecting rod are lubricated with this grease. The oil also envelops the cylinder walls and reduces the friction of the piston rings.

The chainsaw engine is high-speed, some models can reach up to 15,000 rpm, which places tremendous stress on the bearings and other engine parts. Insufficient or poor quality lubricant will cause the bearings and piston to run virtually dry, resulting in higher temperatures. High bearing temperature can cause bearings to seize.

Heating the piston to the limit causes it to melt, aluminum particles from the piston are transferred to the surface of the cylinder and, cooling slightly, become hard. The rings, when passing over an area with aluminum build-up, get damaged or jammed.

How to mix fuel for chainsaw

Another danger of low-quality lubrication, it is a fouling. Fouling can form under the piston rings, making it difficult or completely stop them working properly, and in the exhaust port. It is not uncommon for sludge to completely seal an exhaust port and muffler. Here is a video about the consequences of using low-quality oil.

How to thin petrol for a chain saw

Few people know the rules of how to dilute gasoline for a chainsaw. Incorrect proportions of gasoline and oil, poured into the tank of a two-stroke chainsaw engine and used for a long time will lead to negative consequences, which will affect the work of the gardening and sawing tools. If you ignore the fuel-oil mixture and use pure gasoline instead, it will cause your saw to break down prematurely and be repaired immediately.

How to dilute gasoline with chainsaw oil: types of oils, choice of gasoline, proportions and mixing procedure

The most different brands of chainsaws are purchased by owners of country houses. The miracle machine is indispensable for making firewood and constructing outbuildings. Those who have been using the tool for a long time know all the peculiarities of its maintenance. But beginners should definitely learn how to dilute gasoline and chain saw oil. This will be discussed in the article.

Main issue

It consists in observing the proportions of oil and gasoline for the chainsaw. Excessive first ingredient will result in fouling on the plugs and pistons. Excessive gasoline contributes to the fact that the pistons will be scuffed, which will cause rapid engine failure. The exact proportions are stated by themselves and STIHL give a recommendation to take 4 liters of petrol per 100 ml of oil. This is typical for power tools with engines up to 1.5 kW. With more power, the proportion should be 1/50. The average answer to the question “How do you dilute gasoline in a chainsaw??”it is recommended to use the following proportions: 20-50 ml of oil per 1 liter of gasoline.

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“Partner” and Jonsered recommend using 3.3 liters of gasoline per 100 ml of oil.

As you can see, the proportions of oil and gasoline used vary from manufacturer to manufacturer. It is therefore important to follow the instructions for the brands and models in question.

Mixing should be carried out in special canisters, on which there are measuring divisions and there are two holes: one. for oil, the other. for gasoline. Components are poured in, the container is tilted, and the mixture is stirred while the lids are closed. No drops of water or solid particles should get into the prepared mixture.

petrol, chainsaw

However, these containers have a minimum mark of 1 liter, so if the volume is smaller, the measure can be made by yourself. A 0.5 to 1 liter plastic bottle can be used for this purpose. We pour 102 ml (up to 816 ml) of water into them using a measuring jug. After pouring each portion, make a mark, on the level of which are written numbers from 2 to 18 in increments of 2. Use a needleless syringe 10-20 ml to measure the oil. The 102 ml water step provides a 1/50 ratio. At other ratios it needs to be changed accordingly.

The ready mix should be stored not longer than 1 month. It’s even better to use it up in a few days. This is due to the fact that it undergoes oxidation processes which change its chemical composition. The ideal mix consumption is one day. If the engine breaks down because of overdrawn fuel, it will be considered a non-warranty case. If, after the season is over, there is a mixture left in the chainsaw, it is necessary to shut down the engine and remove the remnants of the mixture.

To make fuel mixture huyosen chainsaw

petrol, chainsaw

Design of a gasoline engine for chainsaws

Chainsaws, like most other similar equipment, use two-stroke internal combustion engines. Their main advantage over four-stroke engines, which are used in cars, is the fact that for 2-stroke engines it turns out to remove half as much power for the same volume. But there are some disadvantages. chain saw oil should be added directly to the fuel tank, which increases oil consumption. As a result, a mixture of oil and gasoline when burned in the working chamber turns into an oil mist that settles on the cylinder walls and lubricates the elements of the connecting rod and piston group.

The oil is added in a certain proportion to petrol and then added to the tank. When the gasoline in the tank runs out, you need to prepare a new mixture. At the same time it is impossible to use car oil in a chainsaw. you need a special oil for two-stroke engines.

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Use a special oil for two-stroke engines to prepare the fuel mixture. There are a great many of them these days. But manufacturers themselves, especially the serious ones like STIHL or Husqvarna, always write which oil to mix with gasoline for their chain saws. They are made under the same brand name, so STIHL oil is suitable for a STIHL saw, for example, and Husqvarna oil for a Husqvarna.

In that case, representatives of manufacturing firms declare that they do not know how a chainsaw will work with other oils, but they can certainly guarantee the proper operation of their machines when the fuel mixture is prepared on the basis of that product which they indicate in the instruction manual. By the way, if a malfunction occurs in the piston group during the warranty period, you can refuse free repair if it turns out that you added something other than what the manufacturer indicates.

If the instructions do not specify a particular brand, you can mix gasoline with any two-stroke oil you can find in stores. I still recommend to buy the products of famous producers, like STIHL or Husqvarna, but also, for example, Echo, Hitachi, Makita. Naturally, you can safely take the goods not only of those manufacturers who produce gasoline, but also those who specifically specialize in the production of fuel and lubricants, such as Ravenol.

Chainsaw Basics: Fuel and Oil

The service guys I’ve talked to all praise the same STIHL and Husqvarna oils.

Physical and chemical properties

Density at 15 C, kg/m 3 876,8
Kinematic viscosity at 100 °C, mm 2 /s 10,76
Kinematic viscosity at 40 C, mm 2 /s 81,36
Viscosity index 118
Flash point in an open crucible, C 158
solidification temperature, °C -37
quality grades JASO FD/ISO-L-EGD, JASO FB/API TC
Tolerance Husqvarna HVA 242, HVA 346, STIHL

Can I mix different colors and brands of oil??

Mixing oils of different brands is not recommended. First, they may be made on different, incompatible bases. synthetics, semi-synthetics, mineral. Secondly, in different brand oils may be different additives. How they may chemically react with each other and what the result will be is impossible to predict.

The main thing is that there is no need to do it. It is more reasonable to add oil of the same brand to gasoline and work out the blend. And then start using a different oil.

Look at the labels, there are three different STIHL oils, all with different colors and characteristics. They can not mix with each other, as written in his instructions himself producer

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