What Proportion Of Gasoline For The Lawn Mower
Oil for four-stroke engines
For engines of this type, lubricants marked SAE-30, SAE 20w-50 and SAE 10w-30 are ideal. Numbers and letters indicate the viscosity of the grease as well as weather conditions. For example, SAE-30 and SAE 20w-50 are ideal for summer time, while SAE 10w-30 is best used during winter or off-season. Oil marked 5w30 is allowed for all seasons. For four-stroke engines, preference is given to semi-synthetic or mineral products.
Lubricants for two-stroke engines
Lubricant manufacturers always indicate on the label or in the instructions for use for which types of engines this product is suitable. The following lubricants are available for two-stroke engines:
Mixing ratios for two-stroke engines and tips for preparing it
If the fuel mixture is prepared observing all the rules and proportions, then the equipment will serve for a long time without serious malfunctions. Only if the correct proportions are observed will fuel consumption be minimal and productivity will be high. At the same time, it is advisable to always use the same components without changing the brand of manufacturers.
You shouldn’t add more oil than prescribed by the instructions, but you can’t save on it either. To prepare the correct proportions of the mixture, it is advisable to use the same container each time. Some manufacturers produce, together with oil, a measuring container with risks.
The ideal ratio of oil to gasoline is 50: 1, where 1 part of lubricant is taken for 50 parts of fuel. For example, 1 liter of gasoline will require 20 milliliters of oil, or 5 liters of fuel will require 100 milliliters of oil.
Important! In addition to maintaining the correct ratio of ingredients, it is necessary to follow the mixing technology. In no case should you just add gasoline to oil.
How to choose the right gasoline for your lawn mower. Features of refueling and fuel proportions.
For productive and long-term operation of the device, it is necessary to fill it with a suitable brand of gasoline or a fuel mixture prepared in ideal ratios. If you inattentively follow the manufacturer’s recommendations and fill the tank with an unsuitable brand of fuel, then over time the equipment will fail. This will cause the following problems:
- Carbon deposits will appear on the entire piston system;
- Candles and cylinders will become unusable;
- The motor will constantly overheat and work intermittently;
- The efficiency of the device will decrease.
The advantages of a gasoline trimmer
A gasoline-powered lawnmower has several advantages:
- High power and performance;
- Refueling at any time during operation;
- Possibility of using a rotor attachment for cutting small trees or shrubs;
- Mobility (the ability to use anywhere. on the site or in the field).
Gasoline mowers are available in 0.5 liter, 1 liter and 1.5 liter tank volumes.
four-stroke lawn mowers
Trimmers, driven by a four-stroke engine, have a more complex device that provides separate containers for gasoline and oil. In such units, you cannot use the grease used in two-stroke motors. Gasoline for a lawn mower with such a motor can be of the AI-92 or AI-95 brands. It is not recommended to use fuels with a lower octane rating, as this will lead to interruptions in operation and further malfunctions.
The four-stroke engine is less expensive in terms of the amount of gasoline and oil, and also emits less exhaust gases.
Choosing a lawn mower oil
As mentioned above, lawn mower oil is needed to lubricate the working parts of the engine. Oily liquid, when it gets inside, spreads over the parts, providing easy sliding, durability and minimal wear of equipment.
Important! Oil for 2-stroke engine is absolutely not suitable for 4-stroke engine.
The difference is that when a 2-stroke engine is running, oil burns out together with gasoline, while oil for a 4-stroke engine does not burn, but on the contrary, retains its physical and chemical characteristics.
Important! Never pour car oil into the tank. Lubricants for cars and trucks are designed for water-cooled mechanisms. Lawn mowers use air cooling. Therefore, for garden equipment, their products are produced focused on air cooling.
Types of engines in lawn mowers
Before filling the fuel tank with gasoline, it is important to determine which type of engine is built into the mower. Trimmers are available with two-stroke and four-stroke engines. Their refueling and maintenance are significantly different.
When choosing a unit, you should adhere to some rules:
- Among the wide variety of models, you should opt for units with high power, since the fast and efficient operation of the trimmer will depend on this indicator. The engine must start effortlessly and have a system that regulates emissions of harmful substances. For home use, a unit with a low weight is suitable;
- The size of the tank depends on how long the machine has been running continuously. The more fuel is poured into the tank, the more time the lawn mower can work, but the weight of the tool in this case will also be greater;
- If you need to purchase a trimmer, the noise level of which during operation will be low, it is better to opt for devices with a four-stroke engine. The cost of such devices is higher than with a two-stroke motor, but they are much easier and more pleasant to work with;
- If you plan to mow a large amount of weeds or harvest hay for livestock, it is advisable to stay with professional trimmers that can withstand significant loads for a long time. If the work will be carried out exclusively for ennobling landscape design, then attention should be paid to the cutting parts of the apparatus;
- The presence of a large number of trees, bushes or stones on the site excludes the use of a trimmer with metal knives. In this case, it is better to prefer a model with a cutting line, which will exclude damage to trees and the tool itself;
- Ease of use of the unit also depends on its handle. For work in large areas and a wide swing, you should opt for the T-shaped handle, and for the treatment of difficult thickets, it is advisable to purchase a trimmer with a D-shaped handle.
How to mix 2-stroke gasoline and oil
The ratio of oil to gasoline is the main fuel for two-stroke engines. The fuel mixture guarantees efficient engine operation, helps to preserve its moving parts and reduce the number of breakdowns.
Fuel mixture preparation rules
The process of preparing the fuel mixture should begin with a detailed acquaintance with the instructions attached to it. As mentioned at the beginning of the article, some drivers who, in their opinion, have incredible experience, do everything “by eye”. Of course, over time, each driver knows how and what needs to be done, however, each mixture has its own differences, so it will never be superfluous to get acquainted with the advice from the manufacturer.
The main rules for operating the fuel mixture include:
- Under no circumstances reduce the proportion of oil to gasoline. Oil is an expensive component, so many people decide to save on it. However, an insufficient amount of oil in the mixture leads to strong heating of the piston and cylinder of the engine. Because of this, seizures appear, which ultimately leads to the need for serious repairs.
- Do not use too much oil in relation to gasoline. Increasing the proportions of the oil is also detrimental to engine performance. An excessive amount of oil leads to an increase in carbon deposits and rapid wear of the engine mechanism. Repair in this case will cost as much as in the first case.
- Do not store the prepared mixture for more than 30 days. Otherwise, it loses its properties and the use of such a mixture can harm the engine.
- Do not allow dirt, dust and other mechanical debris to enter, due to which the engine can become unusable.
Signs of misuse
Using a dirty or disproportionate mixture can cause serious engine malfunction. If you made a mistake when mixing. it’s okay, because the car itself will tell you about it. You just need to be attentive to some signs, including:
- The appearance of dirt and various deposits on the carburetor.
- Rapid clogging of the fuel filter located in the gas tank.
- Oxidation of the carburetor walls and loss of elasticity of the rubber diaphragm in various parts of the gas tank. This symptom manifests itself only with prolonged storage of an unusable mixture directly in the gas tank of a car.
Proportions and mixing process
How to determine the proportions for mixing oil with gasoline? The standard proportions must be indicated on the oil container. The amount of oil used may differ depending on the manufacturer, but proportions of 1:40 or 1:50 are often used. A slight deviation from this ratio is allowed. this will not entail serious consequences.
Having determined the exact proportions, you need to proceed to the direct preparation of the mixture. How can this be done? Various containers are suitable for this. Important: in no case should you mix fuel with oil directly in the gas tank, pouring one liquid after another in turn. the mixture is always prepared separately and only then is it slowly poured into the gas tank.
A wide variety of mixing tools can be used, including:
- Special containers for mixing. These are handy canisters with two separate compartments. separate for gasoline and oil. To prepare a mixture in such a container, you just need to pour the required amount of liquid, close the container and tilt the canister several times. Such devices are very convenient, but they are also quite expensive. If you have to mix the mixture often enough, then you should think about purchasing such a container.
- Conventional metal and plastic canisters. Standard canisters are the most practical options. One has only to be careful when using plastic and glass canisters, because when using them, there is a possibility of an electrical discharge. If you need to prepare a small amount of the mixture, you can use a regular plastic bottle.
- Improvised means. To save money, many people use improvised devices, for example, baby horns and even syringes. Such funds are not very convenient, but they cost a penny.
How and what to store the finished mixture?
Manufacturers recommend storing the fuel mixture in a clean container, preferably in a metal container. In no case should the mixture be left in direct sunlight, because this will lead not only to the loss of its properties, but also to other very unpleasant consequences. The maximum shelf life of the ready-mixed mixture is 30 days.
Depending on how often the car is used, some drivers prepare the mixture once a week, others once a month. Of course, not every owner has the time to constantly measure the proportions and mix fuel and oil. It is important to remember that the fresher the mixture, the better it is for the engine.
Many people use plastic cans and bottles as containers for storing the mixture. It is convenient and practical. There is always room for a small plastic bottle. However, you should be careful in this. The fact is that during long-term storage in a plastic container, the fuel mixture can literally “eat through” a hole in it. The process of corroding plastic is very fast. Therefore, it is best to use metal containers.
Perhaps it is not so convenient, but it is more reliable. If, nevertheless, there is a need to use a plastic canister, then remember that the mixture can be stored in it for no more than two to three days. Then it needs to be poured into another container.
Fuel and oil for mixing
It is not always easy to properly prepare the fuel mixture. It is necessary to correctly calculate the proportions, mix the liquids and store the finished mixture correctly. Some drivers use their own recipes, adding their “secret” ingredients, which may even include soda. To make the fuel mixture not a problem, you need to follow a few simple rules and follow the instructions from the manufacturer.
To prepare the mixture, use standard gasoline and oil from various manufacturers. What brand of gasoline should I use to prepare the oil mixture? Some people mistakenly believe that 80-grade gasoline is best suited, because it contains many different additives. This is partly true, but this does not make it better than 92 and 95 gasoline.
over, it is very difficult to get gasoline of the 80th grade, because not one large fuel producer in the country now produces it. Therefore, the best option is gasoline of the 95th grade, which has almost the same cost as gasoline of the 92nd grade.
What is the best oil for mixing? It all depends on the driver’s preferences in a particular manufacturer. The only important thing is to use oil only for its intended purpose. If oil is for a tractor or boat, then you should not use it for a car.
Formation of gummy deposits in the carburetor area.
At the slightest manifestation of one of the signs, it is necessary to make changes in the mixing process, choosing more suitable proportions. This way you can select the ideal fuel mixture and avoid serious engine malfunctions.
In order to independently prepare the correct fuel mixture, which will ensure ideal engine performance, it is necessary to use a suitable fuel, strictly adhere to the proportions indicated by the manufacturer, use a suitable container and store the ready mixture for no longer than 30 days. By adhering to these rules, you will prepare the perfect mixture for your car engine.
If the mixture is diluted correctly, for example, following the instructions below, the equipment will serve you for more than one year without serious technical breakdowns. In this case, fuel consumption will be low, and the result of work will be high. The fuel preparation process must always be the same and constant. It is better to use the ingredients always the same, without changing the brand indicated by the manufacturer.
It is not worth adding a lot of oil, it can damage the operation of the engine, but you should not save on it either. To maintain the correct proportions, always use the same measuring container, so as not to be mistaken with the quantity. Medical syringes can be used to measure the oil, but some manufacturers, along with the oil, provide a measuring container with risks in the kit.
The most correct ratio of oil to gasoline is 1 to 50, where 50 is the amount of gasoline, and the amount of oil is 1. For a better understanding, let us explain that 1 liter is equal to 1000 ml. So, to get a ratio of 1 to 50, divide 1000 ml by 50, we get 20 ml. As a result, only 20 milliliters of oil need to be added to 1 liter of gasoline. To dilute 5 liters of gasoline, you need 100 ml of oil.
In addition to maintaining the correct proportion, the mixing technology of the ingredients must also be followed. In no case should you just add oil to the gas tank. Better to follow the following step by step instructions.
- To dilute the mixture, you must prepare in advance a container in which you will mix gasoline and oil. This can be a clean metal or plastic canister with a volume of 3, 5 or 10 liters to make it easier to calculate the amount of oil. Do not use drinking water bottles for this purpose. they are made of thin plastic that can dissolve from gasoline. Use a special measuring container to measure the oil. But if there is none, then, as already noted, medical syringes with a large dosage will do.
- Pour gasoline into the canister without adding a couple of centimeters to the full volume. In order not to spill gasoline, take a watering can or insert a funnel into the neck of the canister. Then take the required amount of oil into a syringe or measuring device and pour it into a container with gasoline. It is not recommended to do the opposite. pour gasoline into oil.
- Close the bottle tightly and stir the mixture. If during the preparation of the mixture or its mixing, part of the fuel spills out, you must immediately wipe the canister with a dry cloth.
- Be sure to follow fire safety measures. Dilute the mixture away from fire and never leave leftover fuel or used materials within easy reach of children.
And one more important point: it is better to prepare the mixture exactly as much as will fit into the fuel tank of your lawn mower. It is undesirable to leave the remains of the mixture.
Choosing a brand of gasoline for trimmers
Select the brand of gasoline for lawn mowers, taking into account the manufacturer’s recommendations. If you do not follow them, then the motor will soon break down. Often RON 92 or RON 95 unleaded fuel is used to fill the trimmer tank.
Gasoline for fuel mixture
Filling the trimmer with AI-80 gasoline can lead to device breakdowns due to its low technical characteristics. Please note that after purchase, fuel can be stored for no more than 60 days, but it is better to reduce this period.
Polyethylene cans are not used for storage, because if they come into contact with the inner walls, static electricity will be generated. An accidental spark will cause an explosion. Although, there are special plastic canisters marked “flame”.
For this reason, their lubricating properties, the ability to remain watery with a decrease in temperature, depend. But 5-15% in each composition is assigned to additives. They make it an effective composition that prevents:
- Surface corrosion;
- Heat resistance;
- Resistance to degradation;
- Increase in alkalinity, which prevents oxidation;
- Stabilize viscosity.
The lawn mower oil used with the 4-stroke engine has different additives, viscosity. It also serves to wash moving surfaces, but does not mix with gasoline. The oil is oxidized, contaminated with scale particles and requires a change every 50 hours of operation.
For two-stroke engines, there are two methods to lubricate the piston system and crank mechanism:
- By adding oil to fuel in a clear ratio;
- Fill oil separately, the mixture appears when fuel is injected into the cylinder.
In the photo, oil supply through the plunger pump dispenser into the inlet pipe of the combustion chamber.
The second scheme is the future, while the first method is used in gardening equipment. the preparation of a combustible consistency. New engines are low-noise, economical, but more difficult.
Use the table and dispenser to make a flammable consistency.
The four-stroke engine has a container for oil, which is used to create protection for rubbing parts. With all this, the lubrication system consists of a pump, an oil filter and pipes that supply the composition to the units. Crankcase or tank lubrication is used. At the beginning, oil is supplied to the system from the crankcase and from there it is pumped into the supply pipes by a pump. With a “dry sump”, drops of oil collected in the sump are again sent to the tank.
Pictured is wet sump grease and dry sump grease.
The difference in the composition of the oil for different types of engines is fundamental. The 4-stroke lawnmower oil must maintain a constant composition over a long period of time. Composition for two-stroke engines during combustion must have less mineral inclusions to prevent the formation of carbon deposits.
If the recommended oil is available, you do not need to experiment with choosing a different formulation. In case of absence, choose the one recommended for 2.4, in other words, 4 stroke models. Use gasoline above the recommended brand. in advance to replace burnt-out valves and other components.
A key feature in the selection of a protective ingredient is its operating temperature. The additive is desirable to be heat stable but not thicken at low temperatures. For each mechanism, depending on the criterion of work, there is its own edition oil brand.
Which combustion system is more efficient, 3.5 or 4-stroke? How can a user figure it out and get the best mechanism? Petrol trimmers and 4-stroke lawn mowers are not sold. The two-stroke is much lighter, so the trimmer weighs little and a lady can handle it with it. However, there are two-stroke engines on four-wheeled vehicles. Other differences:
- Various method of using lubricant;
- Environmental friendliness is higher for a 4-stroke motor, it is also the least booming;
- Easier to repair and maintain 2.4-stroke engine;
- Motor resource than just a 4-stroke one, their service is more difficult due to the change of oil in the lawn mower;
- Two-stroke motors are lighter and cheaper.
Gasoline for lawn mowers: which to choose and how to dilute?
For those people who have a summer cottage or a country house, very often there are difficulties with the overgrown grass on the site. As a rule, it is necessary to mow it several times per season and get rid of thickets. A wide range of garden and vegetable garden equipment is currently on the market. One of these assistants can be attributed to a lawn mower, in other words. a trimmer. For effective and long-term operation of such equipment, it is necessary to fill it with high-quality fuel or properly prepared fuel mixtures.
What kind of gasoline is poured into lawn mowers: what kind of oil and how much to pour into the mower. How to refuel the trimmer
A ready-made mixture of gasoline and oil can be stored for no more than 3 months (pure gasoline is stored less). Dilute the amount of fuel that is sufficient for several trimmer uses. In general, prepare:
- Gasoline and oil that is suitable for air-cooled two-stroke engines;
- Metal canister and mixing container;
Adding oil to gasoline
- Pour 1 liter of gasoline into a container of suitable volume and add 1/2 of the required amount of oil.
- Stir gently from a good distance from open flames.
- Add the remaining half of the oil to the fuel and stir again.
Trimmer refueling process
General tips for refueling a trimmer with a 2- or 4-stroke engine:
- Place the fuel tank so that the lid is at the top, then fill in the required amount of fuel.
- Do not overfill the fuel tank. This will lead to one of the problems: overflow into the intake manifold and fuel filter, fuel ignition or engine breakdown.
- Try to pour the mixture so that it does not spill. To do this, you can use a watering can.
- If you do spill fuel, wipe it up immediately. Dispose of the cleaning material, do not accumulate in the room. it is fire hazard.
- The start-up of the device should be started after the fuel canister has been removed at a distance of more than 10 m.
- If there was a long break between the use of the mower, be sure to drain the remaining old fuel.
The 4-stroke engine used in the lawn mower is inferior in many technological parameters to the 4-stroke engine. With a separate supply of gasoline and oil in terms of economy and other indicators, it is better for light vehicles. Today, separate fuel supply saves the consumption of an expensive component by 4 times.
The photo shows the condition of the engine, which has been running without oil change for a long time.
The four-stroke engine has a complex lubrication system, and all the more, methods of cleaning the circulating water must be used. A filter is installed in the oil system to prevent the tubes and pump from clogging up with scale and inclusions. During pollution, this part is replaced.
The manufacturer in the operating annotation gives a schedule for the maintenance of devices and the procedure for the production of work. The effectiveness of the lubrication is miniaturized after 50 hours of operation. Therefore, an oil change is required. In domestic use, during the season there will be no such time of using the device, and it is necessary to clean the filter, change the oil during conservation. Before you change the oil in the mower, you need to increase the fluidity of the water, start the engine and let the system warm up.
How Much Oil To Fill In Gasoline For Lawn Mower
Internal combustion engines used in lawn mowers are available in two or four strokes. For users, you need to know, oil for a lawn mower with a 4-stroke engine is poured separately from gasoline. For a two-stroke engine, a fuel mixture is prepared with the addition of oil. With all this, various compositions are recommended that cannot be substituted and combined.
The energy transmitted by the motor shaft to the rotating mechanisms comes out due to the application of adiabatic expansion of gases at the moment of explosion in the combustion chamber. Due to the movement of the piston in the combustion chamber, gases are compressed. This means that the system works with the smallest gaps, abrasion occurs on the mating parts. The gap between the parts increases, and the compression compression is miniaturized, a suitable pressure is not achieved to ignite the fuel-air consistency.
This will be the case if the lapped parts worked without lubrication. Motor oil for lawn mowers, added to gasoline or falling on the units from the crankcase, is applied with a narrow film between the parts, preventing wear and tear. Because it is impossible to completely remove the wear, the oil washes out the nanoparticles in the gaps, preventing them from destroying the surface.
The prepared fuel mixture should be consumed during the Crescent period, stored in an iron or polypropylene container. Do not store the composition with gasoline in plastic bottles. Decomposition products will get into the mixture, carbon deposits will increase in the combustion chamber.
The device of 4 and 4 stroke types is different for this reason the mixture of lubricants, the additives there are different. Who is the type of mating units in mechanisms asks for types of lubrication that meet the nature of the movement of this unit. What kind of oil to pour into the mower, the manufacturer advises in the annotation for use.
Gasoline for four-stroke engine
Devices with a four-stroke motor are more complex. Oil and gasoline are poured into different containers, from where they are then fed to the engine. For a mower with such a motor, you need AI-92 and AI-95 gasoline. It is better not to use fuel with a lower octane number, because This will lead to unstable engine operation. In addition, do not use a lubricant designed for two-stroke models.
How to breed
Stihl saw fuel mixture is prepared by mixing high-octane gasoline and two-stroke engine oil. The proportion of oil and gasoline for a chainsaw is as follows: if the power of the unit does not exceed 1.5 kW, then the ratio will be 1:40 (i.e. 25 ml of oil per liter of gasoline), and with a power higher than this value. 1:50 (20 ml for 1 l).
Looking at the table of proportions, we will analyze, using the example of two saws of different power, how to mix oil gasoline.
- For the low-power STIHL MS 180 with a 2-stroke engine, the dilution will be 1:40. Its fuel tank capacity is only 0.25 liters. In order to mix fuel with oil for one refueling, we need 6.25 ml of oil for 0.25 liters of gasoline.
- For the STIHL MS 660 heavy-duty professional chainsaw, dilute oil and gasoline in a ratio of 1:50. This model has a fuel tank capacity of 0.825 l. In order to understand how much oil to pour for such a volume of gasoline, multiply 0.825 by 20. It turns out that 16.5 ml of engine oil is required.
In practice, of course, it is not necessary to calculate what proportion of the lubricant will be diluted in the volume of gasoline per filling. Usually, the fuel mixture is diluted in a volume of 1-2 liters, which is enough for several refueling of the chainsaw.
It is necessary to dilute gasoline for the Stihl chainsaw in a separate canister, in no case pouring the components into the saw’s gas tank separately. These engines do not have an oil pump and the possibility of installing it, so only ready-made fuel is poured into the tank. There are even special canisters with two necks on sale to make it easier to dilute the mixture, but you can add oil to gasoline for a chainsaw and in an ordinary canister.
It is better to keep the proportions of refueling the chainsaw as accurately as possible: excess oil will create carbon deposits on the spark plugs and pistons and provoke detonation during fuel combustion. This can shorten the engine life. In addition, the user of the saw in this case is forced to inhale the exhaust gases with unburned fractions. At the same time, excess gasoline can damage pistons due to insufficient lubrication.
Some folk craftsmen, in the absence of special measuring accessories, advise using a plastic bottle: a full cap (from the same bottle) of oil is poured into a half-liter container filled with gasoline. The output is approximately 1:50.
It is better to calculate the amount of mixture for refueling in advance based on the expected amount of work and the declared consumption of this engine. The volume of the tank in most chainsaws is about 0.5 liters, a 2 kW engine will consume about 1.2 liters per hour of operation (for more precise characteristics of the saw, see the instructions). Thus, it makes no sense to prepare a mixture in volumes exceeding 3 fillings in a row.
Before starting to prepare the mixture, it is recommended to thoroughly clean and dry the neck of the canister and the area around it in order to avoid the ingress of impurities: dust, water, etc. The same is done with the tank before filling the fuel: the lid and neck are cleaned of dust and adhering dirt, so that it does not get into the gas tank, and then into the engine.
The first question that the user faces before starting work is what gasoline to pour into the Stihl chainsaw.
Gasoline for the Stihl chainsaw is filled exclusively with unleaded high-octane gasoline, ie, with an octane number higher than 90. If you fill it with low-octane gasoline, it is fraught with engine overheating, piston seizure and engine failure. Therefore, it is optimal to pour AI-92 or AI-95 gasoline into the chainsaw, but here the question of fuel quality arises.
Poor-quality AI-92 may “fall short” of the declared octane number, and AI-95 often contains many additives that do not bring any benefit to the engine. In addition, if the additives are of poor quality, they do not last long, and after a few days, the purchased fuel can turn into a low-octane fuel, which is not suitable for a chainsaw engine.
At the same time, a good 95 can harm the piston system. “burn” it. Thus, some users have found a way out: to fill the chainsaw with AI-92 gasoline mixed with AI-95. This achieves an optimal balance between octane number and the amount of additives.
Stihl produces its own oil for its tools. High quality Stihl 2-stroke oil with high lubricity.
Consider the table of the assortment of oils for chainsaws from the official website of Stihl.
Here we see two types of motor oils:
- Mineral base,
- Has a shelf life of 4 years,
- Minimum application temperature:.10 ° C
- Available in volumes from 20 ml to 55 liters.
The manufacturer also suggests in the description for lubricants how to dilute the mixture for refueling the saw. in a ratio of 1:50.
What gasoline and oil is better to choose for refueling a Stihl chainsaw: a table of ratios, how to breed, proportions
The durability and reliability of a chainsaw is determined not only by the conditions of its operation, but also by the quality of the fuel used for refueling. In addition to the special conditions of use, when grinding parts in the first few refuelings, attention must also be paid to the quality of the fuel mixture.
Professional Stihl chainsaws are equipped with two-stroke engines that require high-quality fuel. a metered mixture of high-octane gasoline and oil, designed to operate the engine at high speeds. The correct choice of gasoline and oil for the Stihl chainsaw is the key to a long and successful operation of this unit.
Unlike four-stroke engines, Stihl 180 chainsaw oil is poured directly into the gas tank, after being mixed with gasoline. It is recommended to fill the chainsaw with the oil specified in the instructions for this model.
It can significantly reduce the life of the engine, and if traces of such a substance in the cylinder-piston group are found, the tool will be considered withdrawn from the warranty, i.e. it will not be subject to warranty repair or exchange.
Stihl synthetic and mineral oils for chainsaws are sold in bottles or cans of different capacities: from 100 ml to 5 liters. Mineral ones have a lower cost, while semi-synthetic and synthetic ones ensure complete combustion during engine operation, i.e. no carbon deposits and a minimum of toxic compounds in the exhaust.
In addition, synthetic oils retain their qualities over a much wider temperature range, and also contain special additives that are useful for engine operation: antioxidant, detergent, preservative, etc.
You can choose an engine oil for your tasks depending on the saw model and the frequency of its use: the oil consumption during the operation of the device is low, and given the shelf life of semi-synthetic and mineral lubricants, there is a risk of simply not having time to use even a liter bottle to the end.
So with a small estimated amount of work, you can not buy a bulk canister, but limit yourself to a bottle. Only Stihl mineral greases do not have an expiration date.
Ratios of gasoline and oil for the Stihl trimmer
Stihl, a German manufacturer of high-quality cutting tools, produces motor mowers in addition to chainsaws. An indispensable tool for mowing grass and lawn trimming, it is lightweight and mobile.
a lawn mower, or trimmer, also has a two-stroke engine and is fueled with a fuel mixture. For the Stihl trimmer, a ratio of 1:50 is recommended (for 5 liters of gasoline, 100 ml of oil).
When calculating the proportions, remember that it is better to pour oil a little than to save on it: only a significant excess of lubricant is dangerous with the formation of carbon deposits, and a slight excess will not harm the engine. If you do not fill it, the consequences can be more dangerous.
When mixing fuel for a Stihl chainsaw, the manufacturer recommends that you first pour oil into the canister, then add gasoline and then vigorously mix the components. But the practice of use shows that the oil can “stick” to the walls of the canister and mix poorly, so it is better to carefully pour the oil into the gasoline and mix.
It is better not to leave the remains of the fuel mixture in the tank in order to prolong the life of rubber seals and other parts subject to chemical damage. After stopping the saw, the fuel must be drained and disposed of: during long-term storage (more than a month), the octane number and other physicochemical properties of the mixture decrease and it becomes unsuitable for safe use.
In addition, after emptying the gas tank, you need to start the saw engine and let it run at idle speed until it stops on its own. this will mean that the carburetor is also rid of the remaining fuel mixture.
It is important to remember that the long-term performance of the equipment is largely dependent on the user. Saving on fuel in the case of a chainsaw can be much more expensive in the future. by out-of-warranty repairs of a broken saw or by purchasing a new unit. Compliance with the manufacturer’s instructions in most cases helps to understand the principles of operation of the device and prolong its trouble-free and trouble-free operation.
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 (like 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 try to work on pure gasoline, because in this way you will very quickly “kill” the chainsaw.
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 that of Europe, so in our realities it is better to use better quality gasoline.
As for the proportion of the petrol-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 follow the same steps 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 that of Chinese chainsaws, therefore the required amount of oil differs almost twice.
Use a regular medical syringe with sufficient volume to measure the correct amount of oil.
Another subtlety. first pour gasoline into a dry gasoline can, 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 a canister and pour ready-made special fuel into the gas tank! Never cook or mix 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 combustible 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 the saw has a dry carburetor) and now you can leave it until the next operation.
Unsuitable fuel mixture must be disposed of.