How to dilute the gasoline for a lawn mower. Why use oil

How to dilute gasoline and oil for grass trimmer for refueling

The two-stroke engines of the tool work at the expense of the gasoline-oil mixture, which is prepared in the proportions that are specified in the technical certificate of the device. If the rules of mixing are ignored, the garden tool can fail quickly.

The functioning of the two-stroke unit is different from the four-stroke engines: the lubrication of the rubbing surfaces in the crankshaft and other parts of the device is not from the crankcase, but through oil, which was previously diluted with gasoline. The general rule for two-stroke engines is that gasoline is diluted with a certain volume of oil intended for this purpose.

Differences in gasoline engines

Gasoline engines can be two-stroke and four-stroke engines. To understand the difference, you need to know two nuances: first, that during the operation of the engine there are a number of transients, and second, that the tact refers to movement of the piston from one extreme position to another, and the direction of movement does not matter. The essence of the classification of engines is that the entire cycle of transients in one case is repeated in two strokes, in the other. in four.

The differences between the 2T and 4T, which relate directly to the refueling process, can be understood even without going into the intricacies of the main components. In a two-stroke engine, the air-fuel mixture enters the cylinder and the exhaust gases are expelled almost simultaneously. Fuel mist originally flows into the crankcase where the crankshaft is located. On downward movement, the piston pushes some of the mixture from this chamber into the work area through a window in the cylinder wall.

In a four-stroke engine, the combustion chamber is separated from the crankcase. Fuel-air mixture is fed via the intake valve and exhaust gases are discharged via the exhaust valve. The valves are controlled by a separate crankshaft-actuated unit, and the order in which they open and close is synchronized with the piston stroke. Thanks to the separation of the working area from the crankcase and the four-stroke operation, there is complete combustion of fuel and virtually no exhaust gases are removed from the working area before the next batch of mixture is injected.

Gasoline and chain saw oil. which is better?

Often beginners ask what is better to take gasoline for your tool? To make sure you have made the right choice, it is advisable to read the instruction manual of the tool. In the manual, each manufacturer specifies the appropriate brand of fuel. If the manufacturer specifies that the octane number should not be lower than 95, it means that pouring 92 gasoline is not recommended.

Now let’s see, what oil is better for chainsaw engines. Special oils are used for such purposes. It is forbidden to take engine oils from car engines to prepare fuel mixture. For chain saws you need to buy lubricants for two-stroke engines, which are on sale not only in specialized centers, but also in online stores.

Important to know! It is necessary to distinguish that manufacturers produce two types of lubricants for chainsaws. for chains and engines. Chain materials are poured into a separate tank of the tool, and they are used to lubricate the chain while working with the chainsaw.

Two-stroke motor oils are available from such manufacturers:

Usually the ratio is indicated on the lubricant bottle, so it will be difficult even for beginners to get confused with the preparation of the fuel mixture. Under no pretext should you use waste even as a chain lubricant. It will soon be necessary to have the tool repaired.

Obtaining Blend

How much oil to pour per liter to get a quality gasoline mixture? It would seem that there is nothing difficult in mixing the two substances. Mixture preparation is often complicated by the fact that different sources give different information. For example, the manual indicates the ratio of 1 to 40, on the fuel tank of the grass trimmer 1 to 25, and on the oil canister 1 to 50.

Most experts believe that you need to mix in accordance with the instructions on the oil package.

There are a number of requirements for how the thinning process should be carried out. Do not add too much oil. This results in lower ignition characteristics. The consequence of this is a devaluation of the efficiency of the power unit and an overall reduction in its service life. If the gasoline mixture is oversaturated with oil, soot deposits will form on the inner surface of the engine walls (cylinder vents). It is fraught with the risk of scoring on the piston.

Neither oil starvation, nor an excess of lubricant in the petrol base is a good basis for long-term operation of the engine. The same amount of constituents is necessary for trouble-free continuous operation. It is best to use the same measuring tools to avoid unnecessary errors.

How to calculate, say, how much oil to pour on 1 liter of gasoline at the required ratio of 1 to 50? To do this, convert the volume of gasoline in milliliters 1l=1000 ml. Accordingly, to achieve a ratio of 1 to 50 a thousand divided by fifty. You only need 20 grams of oil per liter of gasoline. Someone measures the oil with a 20cc syringe, but for such purposes there is a special measuring spoon, which is sometimes supplied with oil from some manufacturers.

For the convenience of calculating the oil to gasoline ratio, here is a table https://cmetnik.ru/oil/

Preparing the fuel mixture

To obtain a fuel mixture, engine oil is mixed with petrol in certain proportions. You can find these in the instruction manual. mineral lubricants are mixed with petrol at a ratio of 1 to 35, synthetic at 1 to 50.

• pour the exact amount of gasoline into the canister;
• add the required volume of oil, using a dosing device;
• close the container with the lid;
• stir the mixture by shaking the liquid.

The fuel mixture is filled into the tank with a fuel can for your convenience.

The proportions of oil and petrol in the fuel mix are given in the table below. This is helpful for quickly determining the volume of materials that can be mixed.

Store a ready mix of petrol and oil in polypropylene or metal containers for not more than two weeks. Do not store the mixture in plastic bottles. This is due to the fact that gasoline reacts with the container material and the resulting products get into the fuel mixture. Because of this, more soot will be produced during combustion of the composition.

Fill the fuel mixture only when the engine is almost completely cooled down. Do not fill the tank up to the top: leave enough room for the fuel’s thermal expansion.

Follow the rules of fire and personal safety, when working on preparation and pouring the working composition away from the sources of fire.

RedVerg Basic GB52 gasoline grass trimmer

RedVerg Basic GB52 petrol grass trimmer is designed for domestic use. Ergonomic bicycle handle with molded fixation for comfortable work with the tool. Lawn mowing is performed by a spool of fishing line, while a 3-blade disc 255×25.4 is used for mowing thickets.

RedVerg RD-GB243 petrol grass trimmer is designed for working with grass and small bushes. With its help, the operator can quickly and easily tidy up a small or medium-sized lawn. Comfort and safety at work. that’s what the manufacturer paid attention to in the first place. Ergonomic bicycle-type handle gives the mower the possibility to control the direction of the technique sensitively and achieve impressive results of any work.

lawnmower oil selection useful recommendations from professionals

If the instruction manual to the tool was lost, and there are difficulties in choosing the right oil, then it is recommended to choose the following two options:

• Semi-synthetic. are cheaper than synthetic, but more expensive than mineral oil. Suitable for both Russian and foreign-made equipment. Have low smoke parameters, and adequately “take care” of the structural elements of the engine. Produced by distillation of petroleum products and hydrocarbons
• Synthetic. expensive types of lubricants that are suitable for all types of equipment. If you use synthetics for your grass trimmer, the engine of the tool will run like clockwork

When choosing and buying oils for dilution with gasoline, you may be confronted with the fact that on the canisters there are some letter designations. These designations are API classification, which will be useful to know if you want to pour a suitable lubricant in the tool. Let’s look at all types of oils by API classification for two-stroke engines:

• TA. designed for air-cooled devices up to 50 cc. Such equipment includes mopeds, lawnmowers, grass trimmers and brushcutters. Optimal for lawn mowers and grass trimmers
• TB. used for filling the engines of machines such as mopeds, chainsaws, scooters and motorcycles. The engine capacity of these machines is between 50 and 200 cm3. This oil type is also suitable for trimmers
• TC. designed for diluting with gasoline and filling motorcycles, snowmobiles and other types of land vehicles
• TD is for boat engines, hydraulic scooters and speedboats

API classification. this is an American standard used in Europe. But in the selection there are additional designations on the cans of two-stroke motor oils, e.g. FA, FB, FC, FD, etc. This is a smoke-emission classification of oil developed by JASO, Japan. If there are such designations on the selected oils for trimmers and chainsaws, then it is necessary to take into account their deciphering:

• FA. used in states that require minimum smoke emissions by law. During operation they emit an imperceptible fog of smoke
• FB. intended for use in countries with stringent restrictions on smoke emissions to the atmosphere. Virtually no white smoke
• FC. smoke is emitted into the atmosphere in a transparent manner and is not visible to humans
• FD are smokeless 2-stroke engine oils which do not emit smoke and yet have improved chemical properties. They are typically used for blending with gasoline and fuelling boats, launches and yachts

If a container with the lubricant is marked “self-mix” and “pre-mix”, it means self-mixing with petrol (the first option, which does not require shaking), and the need for forced dissolving (the second option).

Knowing the classification of oils by their type, it will not be difficult to choose the best option for your brand of lawnmower. On the market you can find a variety of brands of oil for two-stroke engines, but it is better to pay special attention to such firms:

• STIHL. produce mineral and synthetic, and semi-synthetic of this brand is rare
• Shell Helix Ultra. recommended by experts
• Motul
• Oleo-Mac
• Echo
• Hammerflex
• Lukoil. Russian oil, which costs 3 times cheaper than foreign counterparts, but has excellent quality indicators

The of the products are not listed, as their cost varies. There are many other brands, and if you still want to find the perfect lubricant for your grass trimmer, it is recommended to watch the test in the video clip below.

From the video you can conclude that it is not always useful to buy expensive oils, because they may be of poor quality, as seen in the real example.

Conclusion on the choice of oil! For brushcutters, grass trimmers or lawnmowers, it is best to choose synthetic or semi-synthetic oil labeled TA or TB. Take into account the manufacturer’s recommendations, because some manufacturers of quality equipment may recommend using only synthetic lubricants.

The result of the fuel mixture calculation:

To measure the right amount of oil in milliliters, use a medical syringe of a larger volume, it is cheap, available at any drugstore. Or use any measuring container with graduations.

Our calculator lets you calculate the right gasoline ratio for any power tool like a boat motor, chain saw, grass trimmer, lawn mower, etc.д. In other words you can independently and for free calculate the correct gasoline to oil ratio for two-stroke engines. Mixing instructions in the photo below.

Important, before you start the calculation read the instruction manual of the tool, in particular with the paragraphs: refueling volumes, the ratio of the fuel mixture. This data will be the starting point for the correct calculation.

For your convenience you can print the final result by clicking “Print” icon. We will be very glad to receive your constructive Комментарии и мнения владельцев and feedback about our service.

Keep in mind that gasoline tools have a run-in period and the gasoline/oil ratio differs from the recommended.

Choosing the right oil for your chain saw

Two-stroke engines are filled with a mix of unleaded gasoline and 2T oil. Always use recommended gasoline AI-92. If a higher octane rating is used, the flash and combustion temperature will be higher, and the valves will burn out prematurely. The same goes for oil. The recommended compound is not the most expensive. But using another brand is inadmissible. Viscosity will change, resulting in insufficient lubrication of conventional products made without high-precision lapping.

Too much oil means that incomplete combustion leads to carbon deposits and excessive exhaust emissions. A rich oil mix is bad for the engine. For four-stroke engines oil is poured separately from petrol. It cleans, cools and lowers friction. The oil gets contaminated during operation and must be changed after 50 operating hours. What oil to use in the lawnmower is specified in the owner’s handbook. The compound must be labelled 4T with a viscosity grade of 10W40.

The best oil for every engine is the recommended oil. However, the world famous oil is Shel Helix Ultra. Company spent 40 years developing new technology to turn natural gas into synthetic oil. Pureplus technology has made it possible to obtain an improved base oil composition. It is used by the leading oil companies to make recommended oils for their equipment with all necessary additives.

The oil you choose depends primarily on the manufacturer’s recommendations. Only original STIHL lawnmower oil is used in accordance with the manufacturer’s recommendations. The same oil is good for the Vityaz brand, since the engines in the brands are the same brand. There is an opinion of experts, that oil from any manufacturer intended for one type of equipment is suitable for all brands. But if there is a possibility, it is better to use recommended.

It is necessary to have a reserve of oil for one season. Product that has stood for a long time loses its properties. Available in packages from 0.1 to 5 liters.

Investigated the way of oil, recommended for lawnmower Husqvarna. Company does not have its own production facility, only a bottling plant. Products bought in bulk are filled into small packages, labeled and supplied to the retail network. Possibly exclusive Husqvarna additives were added to the oil during its manufacture.

Use of oil is required, according to the instruction manual for the brushcutter. The equipment cannot work on pure gasoline.