The ratio of oil to gasoline for chainsaws of famous brands, the right proportions, and what not to dilute
Preparation of fuel mixture. a very important process, from observance of correct proportions of gasoline and oil, depends on both gasoline consumption and service life of gasoline saw. Many are accustomed to mix 1:50, but this is not correct.к. The ratio between these two components, varies from manufacturer to manufacturer. Within the framework of this article let’s understand what is recommended to fill up the most known manufacturers, in what proportions, and give an example how to dilute and prepare fuel correctly.
Only two-stroke engine oil for two-stroke engines is added to chainsaw fuel. Four-stroke oils are categorically unsuitable. The reason is that in two-stroke combustion engines oil burns together with gasoline.
In automobile and other four-cycle ICE it is poured into the crankcase, has a lot of special additives, and is not originally designed for combustion. If you pour it into the chainsaw, it will smoke, it will not burn out completely and quickly forms a thick layer of carbon deposits, which can eventually put the chainsaw out of order.
In addition to the general specification “for two-stroke engines” the chain saw manufacturer may recommend you to use a particular oil brand for your model. It may have special combustible additives and additives that extend the life of the saw’s engine.
This is what the oil for 2-stroke chain saw engines of the famous Champion brand looks like
Older, Soviet-era two-stroke engines used the same engine oil as four-stroke engines, such as M8. Old motor oils did not contain as many noncombustible additives as modern oils. To ensure that this unspecialized oil would provide sufficient lubrication for chain saws, higher dosages were used.
When the engine was running-in the ratio 1:20 was used, after 1:25. Large amounts of multipurpose oil that was not designed for complete burnout led to rapid coking and sticking of piston rings, soot formation on the top of the piston, spark plugs, cylinder exhaust and muffler windows. For the same reason the spark on the chainsaw‘s spark plug may disappear.
In neglected cases, the windows and the muffler could be completely covered with soot. Thick layer of soot on the piston significantly reduced the volume of the combustion chamber.
Modern special oils for two-stroke engines provide much more effective lubrication. It is therefore almost half as much as was previously needed. from 1:40 to 1:50.
In this case, the engine remains clean for a long time and lasts a long time, despite the lower mechanical strength of modern engines compared to the old.
We also recommend to read an interesting article on what oil to use for a chainsaw chain and how it can be painlessly replaced.
System aspects and how to fill the saw
Now we are going to “dive” into the core of this instrument, so you can have a general idea of what your “helper” consists of. In fact, this kind of tool can be responsibly attributed to the mechanisms of classical direction, which operate through the involvement of the internal combustion engine.
It is no exaggeration to say that this type of tool is the simplest of all other mechanisms, because the saw has no gearbox and is equipped with a normal two-stroke engine with one cylinder and working on gasoline.
The main advantage of the chainsaw is that it is arranged quite simply, which contributes to increased reliability, as well as trouble-free operation in difficult and demanding conditions. Next we will look at the design of the saw in more detail, so:
- ignition system;
- carburettor (see: chain (see: chain lubrication). carburetor adjustment);
- fuel system;
- air cleaning system;
- chain (see chain. how to sharpen the chain);
- chain brake;
- chain tensioning mechanism;
- chain lubrication system (see: chain brake. chain oil).
In essence, the device is understood, but now an important issue is the lubrication of parts of the chainsaw. Many people do not understand why it is needed at all? The answer is quite simple, like all mechanisms, chainsaws, especially their individual parts, require special care, including periodic lubrication.
It is necessary for your tool to serve you for many years, because during the operation of the chainsaw parts make the movement, which should be smooth, smooth, so as not to damage the adjacent parts.
As everyone knows that friction force breaks the surface, so here, if you do not lubricate the chainsaw as needed, the parts will simply wear out quickly and the tool will be out of LADA. You need it? Don’t think. So you need to take good care of your chainsaw so that it has the strength to last and last for a long time.
When choosing a chainsaw, you should be guided by your needs, by what you want to use it for.
If you have to take it to a similar place, then choose a mini chainsaw.
For woodworking, it is better to use angle-sawed circular saws.
What brand of engine oil to use?
For each model, the manufacturer advises a list of materials to use. It is better for the user to stick to these recommendations, because a tool failure due to improper fuel and lubricant is not covered by the warranty. In this case, the owner will pay for the repair of the chainsaw himself, which can amount to up to 80% of its cost. When it is not possible to follow the manufacturer’s recommendations, try to follow these rules:
- Only use oil intended for two-stroke engines.
- Do not use after the expiration date.
- Do not add high-purity waste oil to gasoline. к. You could damage the mechanism of the tool.
- 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.
Instructions for making a fuel mixture
Let’s find out more about how to dilute the gasoline with oil. Some tool owners do it this way. pour pure gasoline into the tank, and add the required amount of oil. Then close the lid and stir. This way of mixing gasoline and oil is not right. Instructions for preparing the gasoline-oil mixture are as follows:
- You need to take a plastic bottle of equal volume. 1 or 2 liters. You can use a 1.5 liter bottle, but this way you can get confused when adding oil.
- Fill the container halfway with gasoline.
- Add lubricant. It is recommended to dose oil with a syringe. It is desirable to use a 5 cc syringe, which will measure exactly 25 ml of oil.
- After adding the lubricant to the container, shake well.
- Add gasoline until the tank is full, and mix thoroughly again.
- You get a ready-to-use gasoline-oil mixture for the chainsaw, which should be used up within 1-2 weeks.
Many people do not pay proper attention to the storage of prepared mixture, and therefore can prepare 5 liters at once and use it for a year. However, this approach is extremely wrong, because the shelf life of the ready mixture is 15 days. if you are sure that there is no alcohol in gasoline, you can store the ready mix longer. up to 3 months. After that the mixture loses its properties, having a negative effect on the internal combustion engine.
Interesting to know! Take as a rule not to prepare fuel for a chainsaw in large quantities. It is better to prepare 2 times one liter each than to mix 2 liters at once, which will remain, and will be stored indefinitely.
After combining petrol with oil, you only need to fill up the tool and start using it. When refueling a chainsaw, there are some important points to be sure to consider. We will get to the bottom of them.
Advantages and disadvantages of the oil
Any quality machine oil has its pros and cons
Every quality machine oil has its pros and cons. Some experts say that chainsaw oil is a good choice for any purpose. This is not exactly true, almost any substance can be used for a Hurstvana chainsaw, but STIHL chainsaws require only gear oil. When selecting, it is good to know the color of oil, a two-stroke engine requires a compound that has a reddish, bluish or greenish cast.
To mix it yourself, you need to use a heat-resistant lubricant that has a well-known brand name.
The density of the product is affected by seasonality:
What are the characteristics of different oils, you can find out just by carefully studying the label on the container. If there is no instruction or label on the package, you should refuse to use such a substance. The oil’s specifications must not change drastically with changes in temperature.
No substitutes should be used, there are often counterfeit products (up to 20%). To distinguish a fake is difficult enough, one must have special equipment.
It is recommended to store fuel in metal containers. It is better to prepare fuel mixture in a canister.
There are a large number of oils and each has its own characteristics
The consistency is done in ratio:
The specifications of the mineral or organic oil intended for the chain itself are not suitable for preparing the fuel mixture. The ready product is poured into the tank (up to half of it), then stirred (the tank must be hermetically sealed). That way you get a homogeneous mixture. It is better not to prepare fuel in advance, it loses its function quite quickly. Combustible liquid spoils in two weeks at room temperature.
Use Vegetable Oil to Replace Chainsaw Bar Oil
High quality components are necessary
Practice proves the influence of the quality of prepared mix, taking into account the correct proportions on the service life of the tool, power, productivity:
- It is not recommended to use components, whose shelf life has expired.
- Particularly relevant for gasoline and oil components. do not use components derived from gas condensates, because their molecular structure contains sulfur and water, which are harmful to internal combustion engines.
- Partial non-compliance of AI-92 with international standards. The AI-95 brand is saturated with detonation dampening additives.
The mentioned disadvantages limit the service life of chain saws with combustion engines that run on a complex mixture of fuel.
Why mix oil and gasoline?
Most people are used to handling four-stroke engines. Even in motorcycles, this type of engine is now more common than two-stroke engines. The mere requirement to pour oil into gasoline does not in itself lead to an understanding of the process. In fact, in conventional car engines, there is a whole system that prevents the mixing of oil and fuel.
The entire Focus is in the peculiarities of low-powered internal combustion engines with two operating strokes. They are very simple in design and have no oil pan and no pump to force the liquid lubricant into the right places. Only the cylinder and crank mechanism with crankshaft fit in the crankcase.
To provide lubrication, the designers took a different tack: they arranged the duct system in such a way that fuel not only penetrates the combustion chamber but also washes the moving parts from the back of the piston. Since the lubricating power of gasoline is clearly insufficient to reduce friction, oil is added. Because of these characteristics, the rings on the piston are compression rings only; there are no linchpins.
STIHL MS 170 chainsaw: Filling up the chain oil for the saw chain and fuel mixture
Features of the new tool
This includes gentle operation of the chainsaw during the initial stage of its operation. The technology also allows the engine to run on a mixture with 20% more engine oil.
The hourly operating time is specified in the owner’s manual. In practice, for the tool to reach a working level, it is enough to work out 3-5 refills of the gas tank of the saw.
New models do not need running-in, but it is not recommended to use the chainsaw with heavy loads for the first hours of operation.