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Oil selection and fuel mixture for lawn mowers
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.
In fact, it doesn’t matter what technique is used, it can be a lawn mower, a lawn mower or a chain saw, they are united by one two-stroke gasoline engine. Unlike the 4T, it does not have an oil sump. It requires the preparation of a special fuel mixture, consisting of gasoline and oil. The resulting liquid is fed directly to the engine (carburetor). In the process of use, all actively working parts are thoroughly lubricated, contributing to trouble-free operation under all 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 cooling system. Recommended for use in 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. Can be used all year round, regardless of temperature conditions. Ideal for demanding, demanding applications 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, but some 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 is 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 two-stroke engines of 50.200 cm3. Great for lawn mowers, lawn mowers, trimmers, chain saws and other garden equipment.
TD. For outboard boat motors with liquid cooling.
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 equipment, there is a special engine oil for two-stroke engines with air cooling system and marking for garden equipment. Do not use lubricant for 2T liquid-cooled engines. Also not recommended for outboard engines, motorcycles and other equipment.
Lawn Mower Oil to Gasoline Ratio: Why is Accuracy Important?
We all loved to chew in childhood, 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 the 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 in spite of 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 oil to pour into lawn mower gasoline?
Everything is quite simple, with the right 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 lawn mower, 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. For mixing, just a couple of tilts of the container 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, the properly prepared mixture is poured into the equipment fuel tank.
Before using the equipment, make sure that the tank cap is tightly closed. 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 ignite anything.
Gasoline with an octane rating of AI-92 is considered the most popular 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 the storage of fuel, its period should not exceed 3 months. Over time, gasoline loses its properties, the resin content 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 the engine, it is recommended to adhere to the average load. After the main elements of the system have been 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 operation and make sure 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.
Chainsaw fuel mixture prepared from two compound 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 the 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 number A-95, in this case, fuel savings can turn out to be deplorable. Often European manufacturers indicate that it is possible to use A-90 or A-92 gasoline, but in 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.
As for the proportions of petrol-oil mixture, then everything is simple: you need to 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 25ml of oil. If you follow the same steps for the ratio 1:50, then we 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.
Use a conventional medical syringe with sufficient volume to measure the correct amount of oil.
Another subtlety Fill a dry gasoline can with gasoline first, then oil. The procedure, on the contrary, is fraught with a low quality fuel mixture, because the oil is more dense, it will stick to the bottom of the canister, what a good mixing there is.
Be sure to prepare the fuel mixture in a canister and pour ready-made special fuel into the gas tank! Never cook or 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 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 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 up 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.
Dispose of unsuitable fuel mixture.
Oil quantity per liter of fuel
Two types of engines are installed on gasoline lawn mowers – four-stroke and two-stroke. There are significant differences between them. The first option has a separate supply of oil and gasoline, that is, there is no need to prepare a special fuel mixture. And the second type of motors requires constant lubrication of engine parts by mixing fuel and oil in a certain proportion.
If you have purchased a two-stroke engine mowing tool, you will need to prepare the fuel mix to refuel the mower.
The fuel mixture consists of gasoline and a special oil for two-stroke engines. When choosing an oil, it is advisable to use a lubricant from the same manufacturer as the lawn mower, but this issue is not critical.
You can distinguish oil for two-stroke engines from others by marking on the label. It also indicates the ratio in which to dilute the lubricant with fuel. When using good and high quality oils, the dosage is usually: 1 part of oil to 50 parts of fuel, that is, 2% of the total volume of fuel. Some owners are confused about these proportions. In fact, everything is very simple.
If the label says 50: 1, this means that 100 grams of oil must be added to 5 liters of gasoline. In other words, 1 liter of gasoline requires 20 grams of engine oil.
Fuel mixture preparation
Many mower manufacturers already supply special containers for gasoline and oil with graduated marks. But in order to more accurately mix the lubricant and fuel, it is better to use a syringe.
For operations on the preparation of a mixture of gasoline and oil, simple equipment will be required:
- Watering can;
- A medical syringe or measuring cup;
- A container with a volume of one liter;
- Oil suitable for two-stroke engines;
First, using a watering can, gasoline is poured into a liter container. For the fuel solution, it will be correct to use the brand of gasoline indicated in the operating instructions., as fuel with a lower octane rating can damage the engine.
Next, we collect oil, observing the proportion, and pour it into the fuel. Gently mix the mixture. The fuel solution is ready.
After adding oil to the fuel, the mixture acquires a special color, which in the future enables you to distinguish a ready-made fuel solution from pure gasoline.
You should not prepare the fuel mixture with a large margin lawn mowers do not recommend this.
Characteristics of misapplication
The use of a contaminated or improperly diluted solution often leads to serious malfunctions. To prevent this from happening, you need to carefully monitor some engine indicators:
- Rapid contamination of the fuel filter;
- The appearance of dirt and various deposits in the carburetor, which will interfere with normal operation.
Gasoline to Lawn Mower Oil Ratio
- Standard proportions
- Mixing rules
- Consequences of violation of the ratio
- How to choose a lawn mower?
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 for trimmer and lawn mower. These units differ in their engines. The more expensive ones have four-stroke engines, all others have two-stroke engines. Of course, the latter are the most popular among the population, since they are simpler in design, 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 question of the correctness of refueling precisely two-stroke lawn mowers, since it depends on how effective and long the operation of such a unit will be.
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 of coke, slag, and the like. As you might guess, this also leads to engine failure. The most important thing is that even a single violation of the proportion in the direction of a lack of oil should not be allowed. It is better to pour a little oil 10 times than not to add just 1 time. 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 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 on the contrary, pouring oil into the poured gasoline.
- Ignoring precise 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.
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 storing gasoline, oil, ready-made fuel mixture and its preparation.
- Use a watering can for filling gasoline into the dilution container 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 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 mowers’ fuel tank with the prepared mixture.
It should 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 hence a deterioration in trimmer performance.