How Much Oil To Pour Into The Lawn Mower

Oil selection and fuel mixture for lawn mowers

much, pour, lawn, mower

So, have you finally become the owner of a petrol lawn mower or lawn mower? And your imagination is already creating images of how you courageously cope with the dense grass. However, the dream of a “perfect lawn” remains a dream, when the question involuntarily arises: what oil to use and what are the proportions of mixing it with gasoline?

You can find a lot of information on the correct preparation of the fuel mixture on the Internet. This topic is actively discussed on forums and other thematic resources. But, despite such an active discussion, there are many inconsistencies that have to be dealt with.

It doesn’t really matter what technique is used, it could be a lawn mower. lawn mower or chain saw. they are united by one. two-stroke gasoline engine. Unlike the 4T, it does not have an oil sump. To feed it, it is required to prepare a special fuel mixture consisting of gasoline and oil. The resulting liquid is fed directly to the engine (carburetor). During use, all actively working parts are thoroughly lubricated, contributing to trouble-free operation under any operating conditions.

Lawn Mower Engine Oil

Depending on the chemical composition, lubricants are divided into the following main groups:

Mineral. They are made on the basis of oils obtained from petroleum distillates. They are characterized by high viscosity and require frequent replacement. The material is intended for low-power appliances with an air-cooled system. Recommended for warm weather.

Semi-synthetic. They represent a kind of “golden mean”. They are based on a mixture of mineral and synthetic oils. A similar lubricant can be used in 2T and 4T engines, gardening and other equipment with air and liquid cooling.

Synthetic. They are made on the basis of special synthetic components containing esters. They are characterized by low viscosity and long service life. They can be used all year round, regardless of temperature conditions. Ideal for challenging heavy duty equipment with constant variable performance.

Any two-stroke oil, due to its 20% solvent composition, mixes well with fuel and has the feature of complete combustion. Their second characteristic feature is the color, which can be green, red or blue. Of course, this does not mean that some lubricant is better, and some is worse. This is done solely so that it is convenient for the user to distinguish oil from pure gasoline.

Classification of engine oils:

The required parameters of oils for 2T engines are prescribed in the requirements of API TC JASO FC, API TC JASO FC ISO GD and API TC JASO FC E-GC. The most widely used classification systems are API. Based on this, 2T engine oils are divided into 4 large groups:

TA. suitable for household appliances with an air cooling system and an engine volume of no more than 50 cm3.

TB. used for more powerful equipment with an air cooling system and a motor volume of 50.200 cm3.

TC. used in technology with high demands for oil quality. It is a high quality lubricant for 50.200 cc two-stroke engines. Great for lawn mowers, lawn mowers, trimmers, chain saws and other garden equipment.

TD. for outboard liquid-cooled boat motors.

Most suitable material for 2T motors of API-TB and API-TC class. However, it is necessary to refer directly to the product passport, where the manufacturer indicates the brand of engine oil recommended for its equipment.

Important! For lawn mowers, lawn mowers and other 2T garden devices, a special engine oil is provided for two-stroke engines with an air cooling system and marked “for garden equipment”. Do not use lubricant for 2T liquid-cooled engines. Also not recommended oil for outboard motors, motorcycles and other equipment.

The ratio of oil to gasoline for lawn mowers: why accuracy is so important?

All of us in childhood loved to “cheat”, so the process of preparing a fuel mixture is not only simple, but also interesting. First of all, it is worth considering the fact that the proportions of the mixture may be different. This depends on engine configuration, oil markings and manufacturer recommendations. The fact is that with an insufficient amount of lubricant, the cylinder and piston heat up, which leads to shallow scuffing of all rubbing surfaces and, consequently, to the failure of the cylinder. piston group. Well, in case of its excess, on the contrary, we get coking of the piston ring and the formation of a large amount of carbon deposits.

And even despite the fact that there is a generally accepted mixing ratio of 2% (for every liter of gasoline, 20 ml of lubricant). The proportions in the mixture are still recommended to be kept exactly.

How much to pour oil into gasoline for lawn mowers?

Everything is quite simple, with the correct balance, the engine runs at full capacity, all parts are thoroughly lubricated and do not wear out. As a result, we get a confidently working technique that will last more than one season.

To know how much oil to add to your lawnmower, you need to familiarize yourself with the performance of the product. Proportional ratios can be presented as follows: 1:25, 1:40 and 1:50, which means 1 part of oil for 25, 40 or 50 parts of gasoline.

1 liter of gasoline = 1000 ml

To determine the required amount of oil for a ratio of 1:25, you need 1000/25 and we will get a ratio of 40 ml.

We carry out the same actions for the ratio 1:40 and 1:50:

1:40 (for 1 liter of gasoline 25 ml of oil)
1:50 (for 1 liter of gasoline 20 ml of oil)

To ensure the correct proportion of lawn mower oil, it is recommended to use a special measuring container (not plastic). Eliminate the possibility of dirt and water getting into the fuel mixture. this may affect its quality. It is better to start preparing the mixture with gasoline. Pour it up to the required mark, then add oil. A couple of tilts of the container are enough for mixing. The liquid quickly combines and acquires a uniform hue, which, depending on the structure of the oil, can be red, green, blue or other. After that, a properly prepared mixture is poured into the equipment fuel tank.

Make sure the tank cap is tightly closed before using the equipment. If you get more fuel, then the remainder can be stored in a special canister or mixing container (no more than 14 days). It is recommended to drain the unused fuel.

Important! Be sure to follow the safety instructions. Mix fluids outdoors to prevent corrosive gasoline fumes from accumulating indoors. Wear gloves and long sleeves. Do not smoke or set anything on fire.


RON 92 gasoline is considered the most popular type of fuel for two-stroke engines. Due to its relatively low cost, it is extremely rarely falsified. Therefore, not one hundred percent, but you can be sure of its quality. It is also permissible to use AI-95 fuel.

As for fuel storage, its term should not exceed 3 months. Over time, gasoline loses its properties, the resin becomes higher and a polymerization process occurs, which adversely affects the combustion chamber. The fuel mixture for lawn mowers made from low-quality materials settles in the form of carbon deposits, as a result of which the main components and systems of the engine suffer.

Recommendations for use and storage

The fuel is ready, poured into the fuel tank, the first spurt and the long-awaited start. However, if you want the equipment to work as long as possible, it is recommended to run it in for the first time. To avoid overheating of the engine, it is recommended to adhere to the average load. After the main elements of the system are thoroughly lubricated, the load can be increased.

Certain rules should also be followed when preparing the braid for off-season storage:

Drain the remaining fuel from the fuel tank and carry out the final run until the fuel is completely depleted. Then, pause the work and make sure that the engine is completely cool.

Unscrew the spark plug carefully and add about 5 ml of lubricant. Pull the starter handle slowly to distribute the oil evenly inside the engine. After that, return the candle to its original state. Store equipment in a cool dry place.


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. In this case, 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 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 that of Europe, so in our realities it is better to use higher quality gasoline.

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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 pistons and cylinders in the engine is much less than that of 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. 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 session.

Unsuitable fuel mixture must be disposed of.

Fuel mixture for 2-stroke trimmers and lawn mowers.

According to statistics, more than 50% of breakdowns of two-stroke engines of trimmers and lawn mowers are associated with the use of poor-quality fuel mixture. Fuel for two-stroke engines is a mixture of gasoline and oil, supplied to the engine through a carburetor in the form of gasoline-oil mist and provides lubrication of bearings and piston group. Since during the operation of a two-stroke engine, oil burns out together with gasoline, the requirements for such oil differ significantly from the requirements for engine oil used in 4-stroke (for example, automobile) engines. First of all, oil for 2-stroke engines should burn out as completely as possible without leaving deposits, provide good lubrication at high temperatures, and have good solubility in gasoline. Incomplete combustion of the oil leads to the formation of carbon deposits on the piston, in the combustion chamber of the cylinder. the exhaust window of the cylinder. Carbon deposits can flake off, get between the piston and the cylinder walls and work like an abrasive, erasing the coating and making “scuffs”.

Given the high demands placed on modern two-stroke engines, many of the major trimmer and lawn mower manufacturers. like Stihl or Husqvarna, they test, formulate and manufacture oils under their own brands. By carefully selecting the base oil additives, the manufacturers ensured excellent engine lubrication at high speeds and temperatures, significantly reduced the flash point of oils and, as a result, the most complete combustion.

How to mix (dilute) gasoline and oil for 2t engines.

Let’s summarize the above. Use for your branded appliances an oil formulated or recommended by the manufacturer of that technique. For example, for Stihl FS 55 lawn mowers Stihl HP oil (see Figure 1a) or Stihl HP SUPER oil, for Husqvarna 128R lawn mowers use Husqvarna HP oil (Figure 1b) or Husqvarna LS oil. For 2-stroke engines, do not use 4-stroke engine oils. e.g. 10W30, SAE 30, etc.

Figure 1 a-husqvarna oil (Left), b-Stihl oil (right)

How much oil to pour into the lawn mower


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  • How much oil should be poured into the Balkankar loader? What kind of oil to pour into the loader.

    There are often questions. what kind of oil to fill in the Balkankar loader. in this article I will try to give a detailed answer on the number and name of all technical fluids.

    How much and how much oil should be poured into the Balkankar loader?

    For diesel engines D2500 and D3900, motor oils of the M10G2K type are provided (according to the operating instructions) or any diesel oil with a viscosity of 10W40 or 10W30. For the D243 engine (installed on the DV 1792M loader). M10DM for turbocharged engines.

    To change the Balkankar oil, the following amount is required:

    The volume of D2500 engine oil. 7.5 liters (DV 1621, DV 1661)

    The volume of D3900 engine oil is 8.5 liters (DV 1784, DV 1786, DV 1788, DV 1792, DV 1794, DV 1798, Dimex D35 and others)

    Engine oil volume D243. 12 liters (DV 1792M)

    For your convenience, I will attach photos of the engines so that you can clearly compare.

    • D3900
    • D2500
    • D243

    How much oil to pour into the gearbox?

    From the factory, two main types of gearboxes were installed. these are the GDP (hydrodynamic transmission) and on earlier versions of the manual transmission forklift a conventional manual transmission. Automatic gearboxes are divided into two types of GDP 6844 (old type) and GDP 6855/6860 (new type)

    To change the oil in the automatic transmission Balkankar, we need:

    For the gas drive unit 6844/6855/6860/6870/6865, 12 liters of oil (together with a torque converter) TYPE “A” or ATF Dexron II are used for the old and new types, without a fluid coupling about 9 liters.

    Differences in automatic transmission. on the left GDP 6844, on the right GDP 6860

    How much coolant is included?

    According to the manual, water or antifreeze should be poured, but practice shows that it is quite possible to use antifreeze. Balkankar produced engines with a cast iron and steel block, they are not whimsical to coolant. It is best to use TOSOL or green antifreeze G11.

    How To Install Oil Into A Lawn Mower Engine

    Up to 2 tons (DV 1621, DV 161). from 15 to 18 liters of coolant.

    than 2 tons (DV 1784-1798). 20 liters (in practice, less is included)

    For loaders DV 1784, DV 1786, DV 1788, DV 1792, DV 1794, DV 1798, the quantity is set to 65 liters I20A, or other gear oil H32, H46. For small lift trucks DV 1621, DV 1661 and other modifications. liters of the same transmission.

    Oil in axle loader Balkancar

    On forklift trucks up to two tons (DV 1621, DV 1630, DV 1636, DV 1661), 5 liters of TAD 17A transmission oil are used or according to API GL4, GL5 80W90 approval, on forklifts over two tons (DV 1784-1798), the same amount is used, exactly 5 liters.

    Brake fluid quantity

    According to the technical literature, 0.5 liters of brake fluid is used for all Balkankar loaders, although in reality a little more is included, it is worth taking 1 liter, it is not so expensive. You can use ROSA or NEVA brands.

    Frequency of replacement of technical fluids Balkancar

    Oil change. every 250-300 m3 / h

    Changing the oil in the gearbox. 500-1000 m / h

    Hydraulic oil change. every 1000 m3 / h

    Change of transmission oil. every 1000 m3 / h

    Brake fluid change. every 1000 m3 / h

    Coolant change. every 1000 m3 / h or 3 years, whichever comes first

    Performing routine maintenance on time, you can guarantee the correct operation of the loader for many years, use original filters and oils, beware of counterfeits. Be sure to check the condition of the air filter. the loader will work for a long time and bring profit to your company.

    Mixing rules

    And now about how to mix the components correctly. However, it would be more logical to start with an analysis of the common, but absolutely unacceptable mistakes that many owners of this mowing unit “sin” with. The following actions are considered as mixing errors.

    • Adding oil to the fuel already poured into the mowers’ gas tank. In this way, a homogeneous fuel mixture cannot be obtained. Perhaps it will work, if only then shake the trimmer for a long time. But it is unlikely that someone will do this, given the severity 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 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 poured 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 dissolve with gasoline.
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    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 a watering can for filling gasoline into a dilution container to avoid spilling, and for adding oil. 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 to the gasoline the entire amount of oil required to prepare the mixture.
    • 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 the ingredients of the mixture, how clean it is.
    • Add the rest of the gasoline to the mixed mixture and mix thoroughly again.
    • You can fill the fuel tank of the lawn mowers with the prepared mixture.

    It must be borne in mind that the ready-made fuel mixture should not be stored for more than 14 days, as it loses its properties, stratifies and evaporates, which leads to changes in proportions, and therefore a deterioration in trimmer performance.

    Consequences of violation of the ratio

    The service life of the motor scooter engine depends on how accurately you follow the manufacturer’s recommended oil-gasoline ratio. 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, and somewhere it will not be enough at all, the parts that touch 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 in the direction of a 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.

    Standard proportions

    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, then we recommend that you look for another trimmer model from 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 likely fuel mixture components for a two-stroke engine. Basically, these units use AI-92 gasoline and a special synthetic oil, which contains a solvent for better mixing with fuel. Such oil evaporates slowly and has the ability to completely burn out in the cylinder, leaving no 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 lawn mowers are working, 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 the 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.

    If the manufacturer recommends fuel with such an octane number, then the requirements must be followed so as not to reduce the operating resource of the equipment.

    Gasoline to lawn mower oil ratio

    • Standard proportions
    • Mixing rules
    • Consequences of violation of the ratio
    • How to choose for lawn mowers?

    lawn mowers are a fairly common technique for combating weeds in summer cottages, in household, road 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 by hand, 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.

    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 what 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 which gasoline this or that model of the unit “loves” 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 about the manufacturer of the equipment. And already according to the standard proportions for this manufacturer, select the proportion for a specific model, taking into account the type of oil.

    You can start selection even by country of origin.

    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. We have already talked about the choice of standard proportions for lawn mowers of European and American manufacturers in connection with the type of oil. According to the class of oils for household trimmers, you need to use TB oil according to the API classification. For more powerful. vehicle class.

    For information on the ratio of gasoline and oil needed for lawn mowers, see the next video.