So, have you finally become the owner of a petrol lawn mower or lawn mower? And your imagination already creates images of how you courageously deal with dense grass. However, the dream of an “ideal lawn” remains a dream when the question involuntarily arises: which 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 in forums and other thematic resources. But, despite such an active discussion, there are many inconsistencies that we have to deal with.
Actually, it doesn’t matter what technique is used, it can be a lawn mower, lawn mowing or chain saw, they are united by one. two-stroke gasoline engine. Unlike 4T, it does not have an oil sump. For its nutrition, the preparation of a special fuel mixture consisting of gasoline and oil is required. The resulting liquid is fed directly to the engine (carburetor). During use, all actively working parts are carefully lubricated, contributing to trouble-free operation under any operating conditions.
Lawnmower 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 highly viscous and require frequent replacement. The material is intended for low power equipment with an air cooling system. It is recommended to use in warm weather.
Semi-synthetic. They represent a kind of “golden mean”. They are based on a mixture of mineral and synthetic oils. Such grease can be used in 2T and 4T engines, landscape gardening and other equipment with air and liquid cooling.
Synthetic. They are made on the basis of special synthetic components containing esters. Differ in low viscosity and long term of operation. They can be used year-round, regardless of temperature conditions. Ideal for complex machinery designed to work in harsh conditions with constant variable performance.
Any two-stroke oil, thanks to its 20% solvent composition, mixes well with fuel and has the characteristic of complete combustion. The second characteristic feature of them is the color, which can be green, red or blue. Of course, this does not mean that some lubricant is better, and some worse. This is done solely so that it is convenient for the user to distinguish oil from pure gasoline.
Motor oil classification:
The required oil parameters for 2T engines are specified 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 system 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 displacement of not more than 50 cm3.
TB. It is used for more powerful equipment with an air cooling system and an engine capacity of 50. 200 cm3.
TC. It is used in technology with high demands on the quality of oil. It is a high-performance lubricant for two-stroke engines with a volume of 50. 200 cm3. Great for lawn mowers, lawn mowers, trimmers, chain saws and other garden equipment.
TD. for outboard motors with liquid cooling.
The most suitable material for 2T motors of API-TB and API-TC class. However, you must refer directly to the product passport, where the manufacturer indicates the brand of motor 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”. It is forbidden to use lubricant for 2T engines with a liquid cooling system. Oil for boat outboard engines, motorcycles and other equipment is also not recommended.
The ratio of oil to gasoline for lawn mowers: why is accuracy so important?
We all loved to “chew” in childhood, so the process of preparing the fuel mixture is not only simple, but also interesting. First of all, it is worth considering the fact that the proportions of the mixture can be different. It depends on the engine configuration, oil labeling and manufacturer’s recommendations. The fact is that with insufficient lubrication, heating of the cylinder and piston occurs, which leads to shallow tearing of all rubbing surfaces and, consequently, to 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 soot.
And even despite the fact that there is a generally accepted mixture ratio of 2% (for each liter of gasoline 20 ml of lubricant). The proportions in the mixture are still recommended to withstand accurately.
How much oil to pour in gasoline for lawn mowers?
Everything is quite simple, subject to the correct balance, the engine runs in full, all parts are carefully lubricated and not abraded. As a result, we get confidently working equipment that will last more than one season.
To know how much oil to add to the lawn mower, you need to familiarize yourself with the operational characteristics of the product. Proportional ratios can be represented in this form: 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 get a proportion of 40 ml.
We perform the same actions to a ratio of 1:40 and 1:50:
1:40 (per 1 liter of gasoline 25 ml of oil)
1:50 (per 1 liter of gasoline 20 ml of oil)
To ensure that the proportion of oil for lawn mowing is correctly observed, it is recommended to use a special measuring container (not plastic). Exclude a possibility of hit in a fuel mix of dirt and water. this may affect its quality. It’s better to start cooking the mixture with gasoline. Pour it to the desired mark, then add oil. A pair of tank slopes are sufficient for mixing. The liquid quickly connects and takes on a uniform shade, which, depending on the structure of the oil, may be red, green, blue or another. Then the correctly prepared mixture is poured into the fuel tank of the equipment.
Before using the equipment, make sure that the tank cap is tightly closed. If you have more fuel, then the remainder can be stored in a special canister or container for mixing (no more than 14 days). It is recommended to drain fuel that is not used up to the end.
Important! Be sure to follow safety instructions. Mix liquids in an open area so that caustic gasoline fumes do not accumulate in the room. Wear gloves and long sleeve clothing. Do not smoke or set fire to anything.
AI-92 octane gasoline is considered the most popular type of fuel for two-stroke engines. Due to the relatively low cost, it is extremely rarely falsified. Therefore, not one hundred percent, but in its quality you can be sure. It is also permissible to use a fuel grade AI-95.
Video: How Much Oil To Add To The Trimmer
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 mowing made from low-quality materials, settles in the form of soot, as a result of which the main components and systems of the engine suffer.
Recommendations for use and storage
The fuel is ready, filled in 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 that you first run it in. In order to avoid overheating of the engine, it is recommended to adhere to an average load. After the main elements of the system are carefully lubricated, the load can be increased.
Certain rules should also be followed when preparing the braid for off-season storage:
Drain remaining fuel from the fuel tank and run the final run until the fuel is completely depleted. Then, suspend operation and make sure that the engine is completely cool.
Carefully turn out the spark plug and fill in with about 5 ml of lubricant. Pull the starter handle slowly so that the oil is evenly distributed inside the engine. After that, return the candle to its original state. Store the equipment in a cool, dry place.
- Standard proportions
- Mixing rules
- The consequences of a violation of the ratio
- How to choose for lawn mowers?
lawn mowers are a fairly common technique for controlling weeds in summer cottages, in household plots, on the road, and in housing and communal services. These devices have two more names. trimmer and lawn mowing. These units differ in their engines. The more expensive of them have four-stroke engines, all the rest are two-stroke. Of course, the latter are the most popular among the population, as it is both simpler in design and mass lighter and much cheaper than its four-stroke competitors. However, two-stroke models are inconvenient in that the fuel mixture for them must be prepared manually, withstanding 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 appropriate substances. Let’s look at the question of the correctness of refueling just the push-pull lawn mowers, since it depends on how efficient and long the operation of such an aggregate will be.
First of all, it is necessary to take into account the information recommended by the manufacturer, since in case of failure of the lawn mowers, you can make your claims to him, and not to an external source. If there is no instruction in the passport, and even more so if there is no passport, we recommend that you look for a different trimmer model from a more reliable seller.
For all other cases when you have a model of lawn mowers in your hands and there is no way to find out its technical features, there are standard proportions of the most likely components of the fuel mixture for a two-stroke engine. Mostly for these units, AI-92 grade gasoline and special synthetic oil are used, which contains a solvent for better mixing with fuel. Such oil evaporates slowly and has the ability to completely burn in the cylinder without leaving a deposit.
The standard ratio of synthetic oil to gasoline is 1: 50. This means that for 5 liters of gasoline you need 100 ml of oil, and in accordance with this, the oil consumption per 1 liter of gasoline is 20 ml. Knowing the amount of oil needed to dilute 1 liter of fuel, you can easily calculate any norms when preparing fuel for the trimmer. When using mineral oils, the ratio of 1: 40 is most often standard. Therefore, 25 ml of such oil will be required per 1 liter of fuel, and 125 ml per 5-liter canister.
When the lawn mowers are working, a person who has little experience in operating such a technique will easily find and correct the actual amount of oil needed for a particular model. It is only necessary to pay attention to exhaust gases (their color, odor toxicity), cycle stability, engine heating and developed power. details about what consequences from the wrong proportions of mixing gasoline and oil can be expected are covered in another section of the article. There are options for lawn mowing running on AI-95 gasoline. This should also be considered.
And now about how to mix components correctly. However, it will be more logical to start by analyzing common, but absolutely unacceptable errors that many owners of this mowing unit “sin”. The following actions are considered to be errors in mixing the fuel mixture.
- Adding oil to fuel already poured into the gas tank. Similarly, a homogeneous fuel mixture cannot be obtained. Perhaps it will turn out, if only then shake the trimmer for a long time. But hardly anyone will do this, given the severity of the unit.
- First pour oil into the mixing tank, and then add gasoline to it. Gasoline has a lower density than oil, so if it is poured to 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 energy will be required much more than if it were done the other way around. pour oil into the gasoline poured.
- Ignoring accurate measuring instruments to take the required volumes 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 bottles from under drinking water to prepare the fuel mixture. Such containers are made from too thin polyethylene, which can dissolve with gasoline.
Given all of the above, we recommend using the following rules when mixing the fuel mixture for two-stroke trimmer engines.
- To use for storage of gasoline, oil, finished fuel mixture and its preparation only clean containers made of metal or special plastic.
- Use to pour gasoline into the dilution tank with a watering can to avoid spillage, and to add oil, use a measuring container with volume risks or a 5 and 10 ml medical syringe.
- First, pour gasoline into the canister to prepare the fuel mixture, and then oil.
- To dilute the mixture, only half of the planned volume of gasoline is first poured into the tank.
- Next, add to the gasoline the entire amount of oil required to prepare the mixture.
- Thoroughly mix the contents of the dilution tank. It is best to interfere by making circular movements with a tightly closed container. Do not mix 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 with the ingredients of the mixture, how clean it is.
- The remainder of the gasoline is added to the mixed mixture and again thoroughly mixed.
- You can fill up the fuel tank of the lawn mowers with the prepared mixture.
It must be borne in mind that the finished fuel mixture should not be stored for more than 14 days, as it loses its properties, delaminates and evaporates, which leads to changes in the proportions, and hence the deterioration of the trimmer.
The consequences of a violation of the ratio
The working life of the engine of the motocosa depends on how accurately you comply with the proportions of the oil-gasoline mixture recommended by the manufacturer. 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 the lubrication of moving and rubbing parts and surfaces of various parts located in the cylinder. If it suddenly turns out that the oil is not enough, and somewhere it will not be enough to get enough, the parts in contact with dryness will begin to damage each other. As a result, galling, scratches and chips are formed, which will necessarily lead to complete or partial unsuitability of the engine (for example, it may 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 eventually turning into solid particles. coke, slag and the like. As you might guess, this also leads to engine failure. The most important thing that should not be allowed. even a single violation of the proportions in the direction of lack of oil. It is better to pour a little oil 10 times than not to add only 1 time. It often happens that this time is quite enough to break the engine.
How to choose for lawn mowers?
For two-stroke engines, the lawn mowers use AI-92 or AI-95 gasoline. Most often. the first of these. Information on this is necessarily available in the technical passport of the product. If for some reason it is not known exactly which gasoline the trimmer should work on, you can choose it by testing both brands of gasoline in action. There will be no global changes in the engine from this, but it is quite possible to determine which gasoline this or that model of the unit “loves” more. This will be shown by the developed power, and throttle response, and heating of the engine, as well as its stable operation at all speeds.
But with the proportions of oil to a certain volume of gasoline, it is much more difficult to determine. In this case, you need to know at least something about the manufacturer of the equipment. And already, according to standard proportions for this manufacturer, choose the proportion for a particular model taking into account the type of oil.
For instance, For Chinese low-power trimmers, two ratios are mainly used. 1: 25 or 1: 32. The first is for mineral, and the second is for synthetic oils. About the choice of standard proportions for lawn mowing European and American manufacturers in connection with the type of oil, we have already said. In the oil class for household trimmers, you need to use TV oil according to the API classification. For more powerful. TS class.
For the ratio of gasoline and oil necessary for lawn mowing, see the next video.