Stihl Chainsaw Gasoline To Oil Ratio
How to choose your chainsaw oil
Oil for two-stroke chainsaw engines should be chosen according to more stringent requirements. Experts recommend using a mineral or semi-synthetic lubricating fluid, which is designed for 2-stroke internal combustion engines used at high speeds.
The advantage of using mineral oil for chainsaws is its low price. Synthetic fluids are more expensive, but have improved quality indicators and meet European standards.
Motor oil is produced by a large number of manufacturers, both foreign and Russian. The best quality oils are made by Husqvarna. According to some characteristics of branded products, domestic Lukoil oil is inferior.
Benefits of branded products:
- Economical consumption;
- Retention of quality during long-term storage or operation in adverse conditions;
- A small amount of toxins;
- No carbon deposits.
In professional and household saws, oils prepared according to the American API-TB technology are used. An analogue of this Japanese-made JASO-FB product is also used. Liquid that was created for 4-stroke engines cannot be used to make a mixture.
The color of the oil, for example, green, red, indicates that the product is manufactured by a company. When selecting indicators and characteristics of the product, Color is not taken into account. Carefully choose engine oil, the manufacturer and composition of which is unknown.
In addition to obtaining additional data on performance and product quality, it is better to refuse to use this oil for now. You can mix motor oils with each other, which have the same characteristics of purpose and composition, which are products of famous brands and are of high quality. Mineral and synthetic oils must not be mixed.
To prepare a high-quality mixture, it is necessary to use branded oils or their analogues, which are recommended by the instruction manual for the chainsaw. So, for example, fuels and lubricants of the Husqvarna and Stihl categories can replace each other.
Experts do NOT advise using grease in the gearbox for chainsaws, which is produced for 2-stroke engines of mopeds and motor boats. The motors of such devices are used in milder external conditions, due to which they have low requirements for quality indicators.
How to dilute gasoline for a chainsaw
Consider how the mixture is prepared for a chainsaw. It is necessary to calculate the correct ratio of gasoline and oil for the chainsaw. For the chainsaw, they take fuel with a high octane index: AI-92 or AI-95.
To prepare the fuel mixture, it is necessary to add 30 g of oil to 1 liter of gasoline, which corresponds to the design of the saw. The resulting fuel fluid is poured into the fuel compartment. Before diluting gasoline, you should get advice from service specialists, who specializes in the repair of chainsaws.
In order for the saw to have a long service life, it is necessary to properly prepare a gasoline-oil mixture, for which only AI-92 and AI-95 brands can be used. The fuel must be NOT leaded, otherwise the internal combustion engine may break. Do not use an old product that has expired, because over time, the fuel can change the octane number. The proportion of lubricant and fuel is strictly adhered to.
You should not save when choosing oil for Husqvarna chainsaws and others. The proportions must be observed due to the fact that excess oil can lead to the growth of carbon deposits on the chainsaw units. Excess gasoline can provoke piston damage and engine breakdown. So, 1 liter of fuel is mixed with 20-50 ml of oil. Husqvarna recommends adding 100 ml of grease to 4 liters of gasoline. This proportion is suitable for saws with a power of up to 1.5 kW.
For structures with a power of more than 1.5 kW, an oil ratio of 1:50 is used. That is, dilute the gasoline like this: add 5 liters of gasoline for a chainsaw to 100 ml of oil. Partner recommends when refueling a chainsaw with fuel, dilute the fuel fluid at the following rates: add 100 ml of lubricant to 3.3 liters of fuel.
When using super-synthetic oils, the indicators are 1: 100. That is, the fuel mixture for the chainsaw must be prepared according to the recipe: add 100 ml of lubricating fluid to 1 liter of fuel. When choosing components, you must use the information that is given in the instructions for any modification of the saw.
Often plastic bottles and other containers are used to mix ingredients. Be careful with plastic and glass. Mixing the components may generate static electricity. It is necessary to ensure that no pebbles, sand or drops of water get into the fuel mixture. The fuel mixture must be mixed well. The prepared fuel mixture should not be stored for more than a month, as oxidation of materials may occur, and the composition of the mixture will change.
Engine breakdown, which was caused by expired fuel, is recognized in the services NOT under warranty. At the same time, the cost of repairs can reach 80% of the price of a new design.
After all work with the use of the chainsaw has been completed, you need to spend the remaining fuel, turn off the engine, remove the remaining mixture.
For the best operation of the device, it is necessary to make a mixture that will ensure uninterrupted operation of the engine, complete combustion of the gasoline-oil mixture without the formation of carbon deposits, smoke or damage.
What should be the proportions of oil and gasoline to prepare the fuel mixture of a chainsaw
The chainsaw is started using an engine running on a mixture of gasoline and an adaptation to the ambient conditions of the oil. It is necessary to observe the proportions of oil and gasoline for the chainsaw, then the device will work stably. To achieve high power, dust is used at high engine speeds. Therefore, increased requirements are imposed on the quality of lubricants and fuel.
What gasoline to pour into a chainsaw
Let’s find out what fuel is recommended for this type of device. Since there is a 2t (two-stroke) engine on chainsaws, and an oil pump cannot be installed on it, it is forbidden to use pure gasoline for the saw. The saws are filled with a fuel mixture of fuel and oil. The norms for refueling chainsaws of different models are regulated by the manufacturer.
Consider what kind of gasoline to pour into the chainsaw experts advise. Refueling the chainsaw is carried out with a fuel with an octane rating of more than 92. To create a mixture, you cannot use fuel with an expired shelf life, made from condensate, which includes water and various impurities.
Domestic saws run on AI-80 fuel. For foreign modifications, AI-92 gasoline is needed. It often happens that the instructions indicate the grade of AI-95 fuel. But experts believe that AI-95 gasoline, which is produced in the Russian Federation, does NOT meet the quality standard. This fuel contains many anti-knock additives.
It is possible to use such gasoline for a chainsaw when creating a mixture only with its high quality. The complexity of the application lies in the use of additives, with the help of which manufacturers increase the performance characteristics of a fuel that has a lower octane number. Therefore, it is not recommended to fill 95 gasoline.
How to refuel a chainsaw
Consider how to refuel your chainsaw. Failure to feed the saw correctly can pose a threat to the life and limb of the operator.
There are rules that must be followed when refueling the saw:
- Oil and fuel mixture must not be spilled;
- The place where the saw will be refueled must be level;
- The place must be more than 2 m away from the area where the device will be used;
- The site must be located away from fire; no smoking in this place;
- While the fuel tank is filling, you need to fill the oil tank, which is intended for automatic chain lubrication; you can distinguish between containers by special icons;
- Before pouring, wipe the container necks with a rag;
- During operation, grease and gasoline must not be spilled, so you need to be careful when unscrewing the canister caps; when refueling, it is better to use a funnel;
- Care should be taken when tightening the latch cap;
- Experts advise NOT to fill the container completely, but to leave some free space.
During the operation of a properly refueled chainsaw, it is necessary to regularly check the tightness of the containers and the operation of the engine. If the chain gets too hot, or gasoline is consumed too quickly (faster than oil), this should alert you. Before starting work, the chainsaw is run in.
With proper operation of the chainsaw, 1 tank of gasoline should be enough for 30 minutes of operating the device at maximum load. When gasoline runs out, there is still grease in the second container, but in a small amount.
The mixture must be prepared in the amount necessary for the implementation of a small amount of work, since with long-term storage of the solution, its quality characteristics deteriorate. The prepared mixture must be spent within several days.
Fuel mixture that has been stored for about a month Decreases engine performance. Resinous substances are formed in the nodes, and carbon deposits appear, the piston rings lose their mobility. The longest shelf life of the mixture is NOT more than 2 weeks. During this period, the solution will NOT lose its quality. If the air temperature is more than 25ºC, the shelf life of the product is reduced to 10 days.
Some experts allow the use of an expired mixture to save money. To do this, it can be spent gradually, gradually mixing it into a fresh solution in a volume of NOT more than 10% of the total amount of the mixture. The finished gasoline-oil mixture must be filtered.
If you follow all of the above recommendations, you can ensure the reliable operation of the chainsaw. Also, when performing work, safety precautions must be observed, since the chainsaw works with the introduction of a chain rotating at high speeds and, if the operating rules are violated, it can pose a danger to the worker himself and the people around him.
Fuel mixture: the proportion of oil and gasoline for the chainsaw
The chainsaw engine is the “heart” of the tool, so it is very important to use a properly prepared fuel mixture.
The fuel mixture for a chainsaw is prepared from two components. oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (as in a four-stroke engine), but directly to gasoline. At the same time, it is very important to observe the correct proportions of ingredients, of course, in no case should you try to work on pure gasoline, because in this way you will very quickly “kill” the chain saw.
If we talk about what kind of gasoline to pour into the chainsaw, then it will be optimal to use fuel with an octane rating of A-95, in this case the savings on fuel can turn out to be deplorable. Often European manufacturers indicate that it is possible to use A-90 or A-92 gasoline, but in the post-Soviet countries the quality of gasoline is inferior to European, therefore, in our realities it is better to use higher quality gasoline.
As for the proportion of the oil-oil mixture itself, everything is simple here: you must follow the instructions for the tool. All manufacturers of chainsaws indicate the required ratio in the instruction manual or in the passport of the tool, in addition, the proportions for refueling the chainsaw may differ depending on the model of the chain saw. As a rule, the proportion of oil and gasoline to a chainsaw of famous manufacturers is a ratio of 1:40 or 1:50, which means 1 part of oil for, for example, 40 parts of gasoline. Now arithmetic 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and we get 25 ml of oil. If you do the same to a 1:50 ratio, you get 20 ml of oil per 1 liter of gasoline. As for budget chainsaws made in China, the situation is slightly different. The ratio of gasoline to chainsaw oil made in China 1:25, that is, divide 1000 ml of gasoline by 25, we get 40 ml of oil. The thing is that in branded chainsaws, a solid assembly and the distance between the pistons and cylinders in the engine is much less than in Chinese chainsaws, therefore the required amount of oil differs almost twice.
In order to measure the correct amount of oil, use a conventional medical syringe of sufficient volume.
Another subtlety. Fill the dry gas canister with gasoline first and then oil. The procedure, on the contrary, is fraught with a low quality fuel mixture, because the oil is denser, it will stick to the bottom of the canister. what a good mixing here.
Be sure to prepare the fuel mixture in the Canister and fill the ready-made special fuel into the gas tank! Never ready and DO NOT mix it directly in the fuel tank of your chainsaw!
If you figured out the question of how to breed gasoline for a chainsaw, then on storage conditions and shelf life of the fuel mixture it is worth saying a few words. It is best and easiest to prepare a petrol-oil mixture for 1 liter of gasoline, it is recommended to do this immediately before working with the tool. Chainsaw fuel tanks have a volume of 0.3 to 1 liter. In the conditions of domestic use, the entire volume of the prepared fuel mixture is rarely used in one session, so the remainder can be saved until the next session. It is necessary to store the fuel mixture in a special Canister for gasoline, in a dry, dark place. It is optimal to count that the shelf life of the finished mixture will be 7-10 days. The fact is that the oil on the market now is NOT synthetic, but organic, that is, natural. After 10 days, all lubricating properties are lost, gasoline simply “eats” the oil. Naturally, it is no longer possible to use such fuel, this can cause breakdown and failure of the chainsaw.
At the end of the work, it is necessary to drain the fuel mixture, start the chainsaw, the tool will stall (so that there is a dry carburetor in the saws) and now you can leave it in the next operation session.
Unsuitable fuel mixture must be disposed of.
Consequences of violation of the ratio
How accurately you will observe the proportions of the oil-gasoline mixture recommended by the manufacturer depends on the service life of the motor scooter engine. The fact is that the fuel mixture enters the cylinders in the form of gasoline-oil mist. And the task of the oil composition is to lubricate the moving and rubbing parts and surfaces of various parts in the cylinder. If it suddenly turns out that there is not enough oil, but somewhere it will not be enough at all, the parts touching dry will begin to damage each other. As a result, scuffs, scratches and chips are formed, which will certainly lead to complete or partial engine failure (for example, it can jam).
In the opposite case, when too much oil enters the engine, it does NOT have time to completely burn out, settling on the cylinder walls and turning over time into solid particles. coke, slag and the like. As you might guess, this also leads to engine failure. The most important thing is that you must not allow. even a single violation of the proportion towards the lack of oil. It is better to pour a little oil 10 times than not to top up just once. It often happens that this time is quite enough to break the engine.
And now about how to mix the components correctly. However, it would be more logical to start with an analysis of common, but absolutely unacceptable mistakes, which many owners of this mowing unit “sin” with. The following actions are considered as mixing errors.
- Adding oil to the fuel already in the mowers’ gas tank. Similarly, a homogeneous fuel mixture will NOT work. Perhaps it will work, if only then shake the trimmer for a long time. But it is unlikely that someone will do this by taking the weight of the unit.
- First pour oil into a mixing container, and then add gasoline to it. Gasoline has a lower density than oil, so if it is poured into the oil, it will remain in the upper layer, that is, natural mixing will NOT occur. Of course, it will be possible to mix later, but much more energy will be required than if it were done the other way around. pour oil into the filled gasoline.
- Ignoring accurate measuring instruments for taking the required quantities of ingredients used. In other words, diluting the amount of oil or gasoline “by eye” is a bad habit when operating motor vehicles.
- Take empty drinking water bottles for preparation of the fuel mixture. Such a container is made of too thin polyethylene, which can be dissolved in gasoline.
Considering all of the above, we recommend using the following rules when mixing a fuel mixture for two-stroke trimmer engines.
- Use only clean containers made of metal or special plastic for storage of gasoline, oil, ready-made fuel mixture and its preparation.
- Use for filling gasoline into the LEIKOME dilution container in order to avoid spilling, and for adding oil. in a measuring container with volume risks or a medical syringe for 5 and 10 ml.
- First, pour gasoline into the canister for preparing the fuel mixture, and then oil.
- To dilute the mixture, first pour only half of the planned volume of gasoline into the container.
- Next, add the entire amount of oil required to prepare the mixture to the gasoline.
- Mix the contents of the dilution container thoroughly. It is best to stir by making circular movements with a tightly closed container. You should not stir the fuel inside the canister with any foreign object, since it is not known what material this object is made of, what reaction it can enter into with an ingredient in the mixture, how clean it is.
- Add the rest of gasoline to the mixed mixture and mix thoroughly again.
- You can refill the fuel tank of the lawn mowers.
It must be borne in mind that the ready-made fuel mixture does not have to be stored for more than 14 days, since it loses its properties, stratifies and evaporates, which leads to changes in proportions, and therefore, deterioration of trimmer performance.
Gasoline to lawn mower oil ratio
lawn mows are a fairly common technique for combating weeds in summer cottages, in road gardens and housing and communal services. These devices have two more names. trimmer and lawn mower. These units differ in their engines. The more expensive ones have four-stroke engines, all the others have two-stroke engines. Of course, the latter are the most popular among the population, since they are simpler in design, and lighter in weight, and much cheaper than their four-stroke competitors. However, two-stroke models are inconvenient in that the fuel mixture for them must be prepared manually, maintaining a strict dosage between gasoline and oil. In four-stroke analogs, the mixing of THESE components occurs automatically, you only need to fill the gas tank and oil tank with the corresponding substances. Let’s consider the issue of the correct refueling of two-stroke lawn mowers, since it depends on how effective and long the operation of such a unit will be.
First of all, it is necessary to take into account the information that the manufacturer recommends, since in the event of a failure of the lawn mowers, you can present your claims to him, and not to a third-party source. If there is no instruction in the passport, and even more so if there is no passport, we recommend that you look for another trimmer model in a more reliable seller.
For all other cases, when you have a lawn mower model in your hands and there is no way to find out its technical features, there are standard proportions of the Most probable fuel mixture components for a two-stroke engine. Basically, for THESE units, AI-92 gasoline and a special synthetic oil are used, which contains a solvent for better mixing with fuel. This oil evaporates slowly and has the ability to completely burn out in the cylinder, Do not leave carbon deposits.
The standard ratio of synthetic oil to gasoline is 1: 50. This means that 5 liters of gasoline need 100 ml of oil, and in accordance with this, oil consumption per 1 liter of gasoline is 20 ml. Knowing the amount of oil required to dilute 1 liter of fuel, you can easily calculate any rates when preparing fuel for the trimmer. When using mineral oils, a ratio of 1: 40 is most often the standard. Therefore, 1 liter of fuel will require 25 ml of such oil, and for a 5-liter canister. 125 ml.
When working with lawn mowers, a person with little experience in operating such equipment will not be difficult to determine and correct the actual amount of oil required for a particular model. You should only pay attention to Exhaust gases (their color, odor toxicity), cycle stability, engine heating and developed power. details about the consequences of incorrect mixing proportions of gasoline and oil can be expected in another section of the article. There are variants of lawn mowers running on AI-95 gasoline. This should also be considered.
How to choose for lawn mowers?
For two-stroke engines, lawn mowers use AI-92 or AI-95 gasoline. Most often. the first of the named. There is always information about this in the technical data sheet of the product. If, for some reason, it is not known exactly on which gasoline the trimmer should work, you can choose it by testing both brands of gasoline in action. Global changes in the engine will not happen from this, and it is quite possible to determine what kind of gasoline and or another model of the unit “likes” more, according to some factors. This will be shown by the developed power, and throttle response, and engine heating, as well as its stable operation at all speeds.
But it is much more difficult to determine the proportions of oil to a certain volume of gasoline. In this case, you need to know at least something in the equipment manufacturer. And already according to the standard proportions for this manufacturer, select the proportion for a specific model, taking into account the type of oil.
For example, for Chinese low-power trimmers, two ratios are mainly used. 1: 25 or 1: 32. The first is for mineral oils, and the second is for synthetic oils. In the choice of standard proportions for lawn mowers of European and American manufacturers in connection with the type of oil, we have already told you earlier. According to the class of oils for household trimmers, you need to use TB oil according to the API classification. For more powerful. class TS.
For the ratio of gasoline to oil required for lawn mowers, see the following.
Why you need to mix oil and gasoline
When using the saw, gasoline should always be mixed with oil. The reason for this is the design features of a two-stroke internal combustion engine. It does not have a dedicated lubrication system for parts (as in other GIS) and, accordingly, its cylinders with O-rings, crankshaft, bearings and connecting rods Must be lubricated directly in the process of obtaining fuel.
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 chainsaws “Stihl 180″; 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.
Power plants in chainsaws are internal combustion engines, fueled with certain brands of gasoline diluted with the required parts of oil.
The main fuel component is the AI grade. It is not recommended to use below or above 92 octane. Suitable for many types of mechanized sawmills of domestic or foreign manufacture.
The ideal ratio of gasoline to chainsaw oil:
- Increases the productivity of the unit;
- Increases the service life;
- Creates money savings.
How to increase the life of your chainsaw?
The chainsaw will be technically sound on one condition:
Strictly adhere to and comply with the prescriptions for the selection of components for the formation of a combustible mixture consisting of gasoline and the recommended oil.
It is not allowed to use oils intended for motor vehicles to form a working product. This is strictly prohibited.
All modern chainsaws are equipped with a two-stroke engine. Its long and trouble-free functioning directly depends on whether the proportion of oil and gasoline is correct for the chainsaw. The variety of tool brands and the features of each of them are a prerequisite for the fact that this procedure is not easy for most novice users of chainsaws.
Recommended brands of fuels and lubricants for powering chainsaws
The specific brand of gasoline for the saw is always given in the manufacturer’s instructions. It is recommended to strictly follow it.
There are 2 types of oil:
- For engine,
- For lubricating the chain and bar.
DO NOT confuse or misuse them. This is guaranteed to damage the tool. Repairing it can cost almost as much as a new saw.
The most popular chainsaw lubricating oils are:
Each container with branded oil always indicates the proportion of oil and gasoline for a chainsaw (Stihl, Husqvarna, Partner, Ural), which must be adhered to when making a mixture.
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.
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.
Why you need to observe the proportion of gasoline and oil?
Many buyers, when purchasing a chainsaw, are perplexed why the oil with gasoline recommended by the manufacturer should be added in the exact amount. It’s all about the intricacies of the two-stroke engine, which differs from the 4-stroke brother in a number of specific design solutions.
You can imagine how the incoming combustible mixture loses oil molecules, which are deposited on the cylinder stacks. In the future, it creates a sliding protective film in the rubbing units and parts of the internal combustion engine, reducing the physical contact of the piston rings with the wall of the cylinder, connecting rod and crankshaft.
To provide the unit with maximum performance, long-term operating conditions are achieved by the correct ratio of pure gasoline to the recommended oil. Violation of the rule guarantees a quick exit from the functional state. Internal combustion engine breakdown will require significant funds for repair or replacement with a new analogue.
Many users of mechanized hand tools consider the oil container present in the unit as a reservoir for lubrication and a power plant. This is fundamentally wrong. The lubricant is designed for the chain during operation. But only. The oil tank is a priori NOT connected by a pipeline to the engine.
Chainsaw “Stihl“: which gasoline oil to use?
A number of manufacturers producing equipment also develop their own consumables, which are adapted to the operation of a particular engine. So the Stihl company produces oil exclusively for its equipment. It is supplied with special additives, which are able to compensate for the quality of the fuel, improving lubrication and cleaning of the fuel mixture. It should be noted that Husqvarna HP oil is universal and can be used for all chainsaws. It can be used at a temperature not lower than 10 degrees.
And also for two-stroke engines products of the following brands are used: Sadko, Kraissmann, Oleo-mac Prosint. If you use a Stihl chainsaw, how much oil per liter of gasoline should you fill? The ratio will be 25 ml of additive per liter of fuel. It must be remembered that there are oils for chains and motors. They are intended for different purposes and are NOT interchangeable. The use of chain oil for the preparation of a fuel and lubricant mixture leads to tool breakage.