Choosing Oil And Gasoline For Cooking A Fuel Mixture For A Trimmer: Disassemble Thoroughly

Choosing Oil And Gasoline For Cooking A Fuel Mixture For A Trimmer: Disassemble Thoroughly

To mow grass in the country or on the field you will need gas trimmers. They work on gasoline, in contrast to electrical counterparts. Not many masters know how to dilute gasoline with oil for trimmers, benzo and lawn mowers. Step-by-step instructions for preparing the fuel mixture in the trimmer will be useful not only to beginners, but also to specialists who may refuel chainsaws incorrectly.

What to choose oil for refueling in trimmer or types of lubricants

Trimmers and lawn mowers are powered by two-stroke engines, which have a simplified design. Rarely, there are models of trimmers with 4-stroke engines that run on clean gasoline. The power units of the push-pull type do not have a compartment for pouring motor oil (oil sump), due to which the weight of the tool is reduced and their cost is reduced. If the rotating parts of the motor are not lubricated, then in the end they will quickly fail. To prevent this, the trimmer is not charged with pure gasoline, but with a mixture of oil. Which oil to dilute with gasoline for trimmer?

To begin with, we recall or find out what types of oils by chemical composition are produced:

  • Mineral liquids. designed for low power equipment with air cooling. This is the cheapest type of lubricant for motors.
  • Semi-synthetic substances. they are used for equipment that has air and water cooling
  • Synthetic. suitable for all types of motors with different types of cooling. They do not require frequent replacement, and this type of lubricant is several times more expensive than mineral and semi-synthetic

From the above it follows that for a trimmer, oil with any composition is suitable. mineral water, synthetics and semi-synthetics. Oils with different chemical compositions differ in price, so you should rely on the recommendations of the tool manufacturer when buying. The instructions provide recommended information on which types of oils are best used. If this is the TC-W3 standard, then it is not so important what composition the substance should have. In this case, mineral water, semi-synthetics and synthetics can be diluted with gasoline.

It is interesting! The main thing when choosing an oil is not to fall for a fake, since today it is very often possible to meet different types of lubricating compounds for two-stroke engines, which mainly consist of low-quality oil products.

Features lawn mowing

Depending on the engine design, lawn mowers are divided into two-stroke and four-stroke. In the first case, the piston in the internal combustion engine makes 2 strokes in one working cycle, and in the second case. 4 strokes. Differences in the operating principle of the engine determine the different approaches to refueling the trimmer.

Read more:  DIY Trimmer Coil Repair.

Two-stroke lawn mowing

In ordinary household models, the lawn mow is used, as a rule, a two-stroke engine. Lawn mowers do not need very high power and agility, so it is quite suitable for the fulfillment of tasks. In addition, this engine is much cheaper and simpler, but it is refueled with a fuel mixture that consists of oil and gasoline. Such fuel is poured into the carburetor and fed into the cylinder in the form of oil-gasoline fog. Thus, the oil provides lubrication of all necessary parts, and during the operation of the engine burns out along with gasoline. However, the combustion of this mixture is accompanied by the release of a pungent odor and smoke, which increases the toxicity of exhaust gases.

Important! For these lawn mowers, you need to use a special oil for two-stroke engines, which burns completely without leaving a burn, and has low volatility. And so that it mixes well with gasoline, it contains 20% of the solvent.

Four-stroke lawn mowing

Four-stroke engines are used in professional lawn mowers. They have great power and can work for a long time without a break and refueling. They also use gasoline and oil as fuel, but they are poured into different tanks. This means that the oil does not participate in the combustion process, so the exhaust gases are not so toxic.

Video: Choosing Oil And Gasoline For Cooking A Fuel Mixture For A Trimmer: Disassemble Thoroughly


On a note! Along with better environmental performance and less heat, four-stroke lawn mowing engines are also more economical. They consume much less fuel. savings reach up to 50% in gasoline and up to 80% in oil.

Oil requirements

As you can see, the existence of various classifications of lubricants suggests that the use of oils in two-stroke engines is necessary. This is due to the fact that the fuel mixture without a lubricant will quickly damage the internal combustion engine, which will not be properly lubricated. Gasoline and oil form the necessary environment, which reduces detonation, removes excess debris (mining generated from the combustion of gasoline products) and protects the inner surface of the engine from wear.

It is important to remember that when using oil of the wrong classification, a motor breakdown or blockage can occur. Of course, it can be repaired, but in order to prevent possible breakdowns and minimize their likelihood, it would be better to study the operating instructions, find out the volume of the two-stroke engine installed on the lawn mower, and use only gasoline and oil, which will suit this parameter in all respects models.

Quite often, in the recommendations section (and sometimes also on the label), the manufacturer indicates the Partner companies whose gasoline and oil he recommends pouring into their models. Most often, the fuel and lubricant recommended by the manufacturer are best suited for the trimmer.

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First of all, all oils of unknown (garage, basement) origin should be immediately excluded from the list of actively operated lubricants. It is usually not easy to dilute such oils due to an unclear basis, composition. As a rule, labels of non-branded manufacturers are not full of information, covering only general information, without clarification. It is highly recommended not to dilute and dilute oils such as AS-10 and ASZp-10. The origin of these lubricants is usually very foggy, it is better to give preference to proven brands that are used every day by thousands of people across the country.

A distinctive feature of all oils for two-stroke engines is the fact that manufacturers paint them in a contrasting color with gasoline. The liquid is translucent, viscous in texture, slightly yellowish, but not thick. Usually, we are talking about three colors. red, green and blue.

Do not forget that the color scheme does not affect the classification in any way (as is often the case with antifreezes).

In no case should you use oils from a line that is not intended for the trimmer. This can extremely negatively affect the operation of the power unit, lead to increased fuel consumption, tanning by candles and a number of other problems that will have to be identified and eliminated. It should be noted that if the fact of using oil that is not included in the tolerances is established, the seller has the full right to withdraw the device from the guarantee. This means that replacement of failed parts will have to be done at your own expense, and no exceptions will help here.

Fuel mixture for two-stroke engines

Trimmers that are equipped with a two-stroke engine do not have a separate system designed to supply oil for the purpose of lubricating rubbing parts. For this reason, such devices need to be refueled not with clean gasoline, but with a mixture of fuel with engine oil. The latter should be specifically designed for two-stroke engines. The use of automotive engine fluid will lead to premature engine failure.

Preparation of a fuel mixture for two-wheeled engines

A gas engine with a two-stroke engine needs gasoline grade AI-92. When using AI-95, engine overheating and uneven operation of the unit may be observed. You need to mix gasoline with oil in a ratio of 50: 1, where 50 is fuel, and 1 is oil. It turns out that 1 liter of fuel will need 20 ml of oil.

If the motor is worn out or the tool is operating at high load, the proportion is 25: 1. If there is not enough lubricant, scoring will appear on the walls of the cylinder and piston surface. Then the piston ring will undergo destruction, as a result of which the engine will jam. An overabundance is not so critical, but it can lead to carbon deposits. At the same time, the piston ring is coked, which will reduce the power of the device.

Read more:  Typical Breakdowns of Gasoline and Electric Trimmers

Proportions of oil and gasoline for the fuel mixture

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.

You can start the selection even in the country of production.

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 talked about earlier. 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.

Rules for the preparation of the fuel mixture

For many beginners who have bought a lawn mower, the issue of diluting gasoline with oil to make a gas mixture becomes a problem. After all, you need to know the proportions and very carefully adhere to them. The instructions for the product usually indicate in what proportion to dilute the components: 1:25 or 1:32, or 1:40, or 1:50. This means that for 1 part of the oil, you need to take 25, 32, 40 or 50 parts of gasoline and mix them.

Of course, it is inconvenient to measure in such categories, therefore it is better to determine how much oil is needed per liter of gasoline using simple mathematical calculations. To do this, divide 1 liter, which is 1000 ml, into a known proportion. The following mixing table is obtained.