Content
The two-stroke engines of the tool work due to a gasoline-oil mixture, which is prepared in the proportions indicated in the data sheet of the device. If mixing rules are ignored, gardening tools can quickly fail.
Why you need to mix oil with gasoline for two-stroke engines
The operation of a two-stroke installation differs from the operation of four-stroke engines: the rubbing surfaces in the crankshaft and other parts of the device are lubricated not from the crankcase, but by means of oil, which was previously diluted with gasoline. For two-stroke types of engines, general rule preparation of a combustible mixture - gasoline is diluted with a certain volume of the oil intended for this purpose.
How to dilute gasoline with trimmer oil - step by step instructions
The mixing of the fuel composition takes place taking into account special proportions.
If the fuel mixture is diluted with an insufficient amount lubricant, this will entail rapid wear of the parts of the petrol cutter
For the optimal oil to gasoline ratio, see the trimmer instructions. Typically, it is 1:50, 1:40, or 1:25.
You will first have to dilute gasoline with a lubricating component in a suitable container: it is forbidden to do this immediately in the fuel tank. If you ignore this rule, the operation of the motor can be inconsistent, as a result of which the tool will quickly fail. Do not use plastic cans or bottles to dilute the fuel mixture, as gasoline can dissolve this synthetic material. Fuel mixing procedure:
- Pour a liter of gasoline into a container (ideally a metal canister).
- Add half of the required proportion of oil.
- Stir liquids thoroughly, away from open flames.
- Pour the rest of the lubricant into the container and mix the mixture again.
- Transfer the fuel to fuel tank trimmer.
Work should be carried out wearing a respirator and rubber gloves... For the convenience of transfusion, you can use a watering can. The ready-made mixture should not be stored longer than 3 months; it is better to dilute exactly as much fuel as you need for the work planned in the near future. Be sure to choose a quality oil for mixing with gasoline, it is better to buy it at proven gas stations.
Proportions of oils and fuels
The calculation of the ratio of ingredients for the preparation of the trimmer dressing should be based on the recommendations on the oil packaging. The standard proportion is 1:50. It is allowed to use any high-quality oil for two-stroke motors.
Gasoline (l) | Oil (ml) |
||||
Rules for the use and storage of the fuel and lubricant mixture
Refueling the trimmer presupposes strict observance of proportions fuel mixture... This rule cannot be violated, as this will lead to rapid wear of the device. Equally dangerous are the consequences of overfilling the tool tank, which can cause fluid overflow into the inlet pipe and fuel filter - this will cause engine breakdown and fuel ignition. To dilute trimmer fuel, the following safety precautions must be followed:
- use a watering can to avoid spilling fuel fluid;
- if fuel spills, it should be wiped up immediately;
- the trimmer operation can be started after the fuel canister is removed in safe place (optimally - at a distance of at least 10 m);
- with a long pause between works, it is recommended to drain the remaining fuel from the tank (when high temperatures hit the tool, the thermally altered substance will deposit on the walls of the annular channels, which will cause a decrease in compression and engine power).
Trimmer specifications contain links to recommended fuels and lubricants. In this case, the octane number of the brand of gasoline is indicated specific, but in the part of oils there is a lengthy explanation about the need to use a product of a certain manufacturer. For persuasiveness, it is indicated that only if these recommendations are followed, the company extends the warranty. What is it: a marketing ploy or oils from other manufacturers do not meet the requirements? The answer is in this article.
Why mix trimmer oil with gasoline
The two-stroke engine has a simple and at the same time extremely efficient design:
- the piston makes a working stroke every second stroke;
- the cylinder is lubricated with oil dissolved in gasoline;
- combustion products are removed by compression, without a special mechanism.
All this led to the creation of a family of small engines that have been successfully adapted in household and professional equipment:
- trimmers;
- chainsaws;
- motorcycles;
- various walk-behind tractors.
Due to the design features, the desired fuel consumption was achieved only by small engines with a capacity in the range of 15 - 20 hp. This figure looks especially good in the range of 1 - 5 hp. Here, in full measure, the low weight and dimensions of the engine correspond to the consumption of gasoline.
As the size increases, the area of \u200b\u200bthe inlet and outlet channels increases. The process of gas removal and fuel supply deteriorates sharply. In this regard, a transition to more effective system combustion of a gasoline mixture, which would provide for the presence of forced engine maintenance systems. Four-stroke models have thus intercepted the palm among power units high power. Combining them into multi-cylinder designs allowed the creation special systemsassociated with the formation of the composition of the fuel mixture, lubricants and other things, which favorably affected the consumption of gasoline.
The rubbing elements of the piston and cylinder of a two-stroke engine are lubricated with oil, which is in a certain proportion in the fuel composition. Gasoline burns out, and oil settles on the surface of the cylinder, reducing the friction of the rubbing parts. Lack of lubrication leads to cylinder damage, up to and including seizure. In the case of excess, under the influence of high temperatures, the thermally modified product is deposited in the annular grooves. Compression drops, and with it power.
How to mix oil with gasoline
Engine oils are used to add trimmer gasoline. Mixing is done in a certain proportion. Manufacturers have different volumetric ratios: from 1 to 50 to 1 to 20. V technical characteristics there is a link to it. You should be careful with small proportions of oils. A small inaccuracy leads to oil starvation of the engine, reduces its resource.
There are products in which the ratio is 1 to 20-40. It is better to refuse to use such a lubricant. A wide range of mixtures indicates poor quality product. Bedding piston rings, with constant use of such varieties, is practically guaranteed.
Motor oils such as M-8 are added in a ratio of 1-20. In high-speed engines, their use is undesirable. The cycle between supplying the mixture is so small that it will cause an overabundance of lubricant in the cylinder. Trimmers have low revs and therefore allow the use of low-grade grease. Due to the initially low resource, you do not have to worry about the coking of the rings. Before the equipment is completely worn out.
It is not essential to use the recommended oil or from other manufacturers. The main thing is to dilute the gasoline with trimmer oil in accordance with the proportions in accordance with the characteristics of the product. Denial of warranty by service workshops only on the basis of the use of a different brand of lubricant, but with acceptable parameters, is illegal.
Fuel mixture preparation for 2-stroke trimmer and brushcutter engines.
According to statistics, more than 50% of breakdowns of two stroke engines trimmers and brushcutters are associated with the use of low-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 carbon deposits, ensure good lubrication at high temperatures, 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, and in 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 large producers trimmers and brushcutters such as Stihl and Husqvarna are testing, formulating and producing oils under their own brands. By carefully selecting additives for base oil, manufacturers have provided excellent engine lubrication when high revs and temperature, 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 brushcutters, Stihl HP oil (see Figure 1a) or Stihl HP SUPER, for Husqvarna 128R brushcutters, use Husqvarna HP oil (Figure 1b) or Husqvarna LS +. For 2-stroke engines, do not use 4-stroke engine oils such as 10W30, SAE 30, etc.
Figure 1 a-husqvarna oil (Left), b-Stihl oil (right)
Never use 2 stroke oil designed for water-cooled engines, as these oils are designed to operate at lower temperatures.
It is necessary to observe the proportions of oil and gasoline for the fuel mixture specified by the manufacturers in the operating instructions. Chinese manufacturers the most often indicated proportion is 1 part oil to 25 parts gasoline, for Stihl and Husqvarna this proportion will be 1/ 50
.When preparing a small volume of a mixture (up to 1 liter), it is very important to carefully measure the amount of oil entering the mixture. Even small miscalculations in the amount of oil can lead to serious inconsistencies in the mixture. In these cases, a medical syringe can be used for accurate dosing.
The fuel mixture must be prepared in a clean container specially designed for this. (see figure 2)
Plastic cans for gasoline are always marked with the flame sign. It is very convenient to use a canister equipped with a system non-spill filling (see figure 3). The Zero Fill System has a valve that prevents fuel from spilling out when the tank is full.
Figure 3- Spill-free filling system
What is the best oil to choose for outboard motors.
Also note that if these oils cannot be used to prepare a gasoline mixture for boat motors... 2t outboard motors must be filled with a mixture prepared from gasoline with an octane number of at least 89 and ultrapure oil with detergents marking NMMATC-W3 in a ratio of 1:50 per operating mode, and, 1:25 for the running-in mode (the first 5-10 hours). Choice quality oil - the basis of engine operation, therefore each manufacturer recommends pouring certain brands of oil into the equipment, thereby guaranteeing the longest service life of the product. So for outboard motors (both 2t and 4t) tohatus, the service center recommends using German motul oils or American quicksilver. For outboard motors mercury must be used exclusively motor oil quicksilver. For honda outboard motors, the most preferred brands are motul and statoil.
When choosing a grass care product in a garden or summer cottage, the owner has a choice - what to buy - a petrol cutter (electric scoop) or a wheeled lawn mower. The abundance of information on the Internet and advice from sellers suits in the head potential buyer a perfect mess based not only on experience (including negative), but also on prejudice and outright ignorance.
Benzokosa is only for strong men! (like Schwarzenegger).
The benzokosa is a 1-2 HP two-stroke gasoline engine located at one end of the tube. And at the other end is a cutting element, disc or spool of line. The total weight of this device is several kilograms. And the suspension point is made so that even a fragile girl can handle the petrol cutter. The braid is very well balanced.
Refueling two-stroke engines and preparing the fuel mixture are miracles of alchemy, inaccessible to a mere mortal….
Two-stroke engines require not just gasoline for their power supply, but a fuel mixture of gasoline and oil (special, for two-stroke engines). This is not a shortage at all, oil for two-stroke engines is sold in any auto parts store and in any place where these same petrol cutters are sold ... Ask the seller and he will lead you to the shelf with these oils. The choice will run wild.
And making a gasoline-oil mixture is no more difficult than dressing a salad with mayonnaise. As a rule, on the scythe (or chainsaw) the ratio of oil and gasoline in the mixture is indicated (1:32 - 1:35). This ratio for mineral oils... And now they are still looking for two-stroke engines, except perhaps among oils for motorcycle engines. For oils in small packaging for gardening equipment - practically only synthetic oils... And they have a ratio of 1:50 (this is usually indicated on the package). It is necessary to adhere to the recommendations from the packaging of the oil!
To prepare the fuel mixture, take a canister, for example, 5 liters of gasoline and add 100 ml of oil to it. That's the whole secret. You will be provided with the mixture for the entire season. Not enough - repeat the procedure ... Pour this mixture into the gas tank and no more problems.
For the "Husqvarna" petrol cutter, you need to buy only "Huskvarna" oil….
Husqvarna does not have its own oil refineries. This is a completely different business. Therefore, she buys oil for two-stroke at an oil refinery in tanks, packs it up in small cans and glues the Husqvarna tag ... And pounds extra $ 2-3 from the uninformed for this tag. Another company, for example "Shtil", buys the same oil at the same plant and glues the label "Calm" on the bottles ... And also beats its 2-3 bucks from fools ... Any two-stroke oil is suitable for any two-stroke engines!
Wheeled lawn mowers - only for perfectly level lawns ...
Nothing of the kind ... I thought so too on my completely unplanned site. It turned out that the wheeled mower bends around the relief perfectly. An obstacle for her is perhaps the anthills, which are removed with a shovel. And the wheeled lawnmower handles uneven terrain perfectly. Especially if it has an adjustable cutting height. Set the maximum - and "check" the site. Where the knife clings to the ground - there you can work with a shovel.
The performance of a wheeled lawn mower is several times higher than a manual petrol cutter. And driving it is no more difficult than rolling a baby carriage. You just go and guide her. Especially if the mower is self-propelled. Even children can handle her.
Wheeled lawn mowers have a 4-stroke and their maintenance is as complicated as a car ...
Wheeled lawn mowers are usually four-stroke engines. The fundamental difference between four-stroke engines and two-stroke engines is the presence of a crankcase, which contains oil for engine lubrication. Therefore for normal work For a 4-stroke engine, you do not need to prepare a fuel mixture from oil and gasoline, it is enough to fill only the gasoline into the gas tank. This circumstance is presented by some dishonest sellers as a virtue - "they say, you don't have to bother with the preparation of the fuel mixture ...". At the same time, they "nicely" miss such a detail as the need for at least an annual oil change in the crankcase of a wheeled lawn mower. The procedure is not complicated, much easier than changing the oil in a car, but more complicated than preparing the fuel mixture. Generally speaking, the oil in the crankcase of a wheeled lawnmower needs to be changed approximately every 50 hours of operation. The lawn mower does not oil filter and therefore the oil is not refined there. This leads to a more frequent oil change regime. On the other hand, 50 hours of operation of a lawn mower per season is a very large amount of time.
Changing the oil on a wheeled lawnmower is easy. Before changing the oil, it is advisable to let the mower run for 10-15 minutes so that the oil warms up and becomes more liquid.
In the design of any lawn mower there is a special screw that closes the drain hole from the motor crankcase. It is usually located under the filler and gauge neck of the crankcase. (in the photo - indicated by an arrow).
The mower is installed with an inclination towards the drain hole, placing a wooden block or brick under the casing on the opposite side. After that, unscrew the screw - the plug. So that oil does not spill on the casing of the mower, from plastic bottle a gutter is cut out through which the oil will flow into the substituted container. It is advisable to use up gasoline from the gas tank before changing the oil.
After that, the screw - the plug is unscrewed and the oil is allowed to drain by tilting the mower. When the oil has drained, the screw is screwed into place. Fresh oil is poured through the measuring neck. Usually, it is recommended to use oil with a viscosity of 10W40, mineral or semi-synthetic in lawn mowers.
The danger of "improvement".
The inexperienced owner of garden motor vehicles, of course, is inclined to almost idolize the new purchased equipment, even to the point of fetishism. He wants to fill it with better gasoline and more expensive oil. it the most common mistakeleading to a very rapid failure of equipment!
The fact is that this garden equipment made by "flow", i.e. the materials used in it are the most common, not special ones. The gaps in the engines are "conveyor", no one has rubbed anything there. Therefore, it is impossible to fill in more liquid oil than recommended by the manufacturer. It simply won't stick in the gaps between the parts.
Do not pour gasoline of a higher grade than recommended. Because gasoline with a higher octane rating burns longer. And this is fraught with burnout of the valve, piston or rings.
It is impossible to pour more oil into the fuel mixture for two-stroke engines (which would be better lubricated). The saying “you can't spoil porridge with butter” is completely inapplicable here. Everything should be in moderation here. In general, read the instructions carefully and follow them, not the advice in the Internet forums.
In general, maintenance of both 2- and 4-stroke engines is simple and does not require any special skills or efforts. For two-stroke engines, it all comes down to the preparation of the fuel mixture and cleaning air filters and ventilation holes. And for four-stroke, maintenance is reduced to an annual oil change and cleaning of the water filters. Other annual work to prepare the lawnmower for the season is described in another article.
Summer residents, owners of private suburban households for lawn care, weed mowing, buy small mechanization. Prefer engine powered trimmers internal combustionpouring in a properly diluted mixture of gasoline and oil.
Motorized streamers require maintenance, use of a combined fuel. Observing the ratio of gasoline and oil, it is easy to achieve the performance of brushcutters.
Comparing with similar mechanisms, when choosing, they give preference to brushcutters for the following functional indicators:
- Mobility and low weight of the unit, allowing it to be carried over distances, used in hard-to-reach places for mowing.
- Versatility. The brushcutter is equipped with a unit for changing working elements directly during the operation of the unit.
- Constructive simplicity that allows you to use the braid for a long time without frequent adjustments.
These other positive characteristics give customers confidence that they are making the right choice when purchasing a trimmer.
Types of brushcutters
Today, on liquid specialized trading floors, there is a large selection of mechanisms for mowing grass, small bushes. For example, lawn mowers with electric motor, with petrol power plants... Brushcutters equipped with diesel enginesbecause they are slow-moving.
Liquid statistics show the advantage of brushcutters with internal combustion engines over electric counterparts. Electrokos is used in places where there is a stationary electrical network.
Two-stroke and four-stroke
Internal combustion engines used in trimmers are two-stroke and four-stroke. By design, two-stroke engines are simple. But they require a high-quality fuel mixture.
Two-stroke power trimmer gasoline needs a precise dosage of lubricant. Ignoring the requirement leads to a sharp reduction in engine life. There are problems with its launch.
A four-stroke engine does not require the correct proportion of oil and gasoline. Formation of the desired mixture is automatic. The components of the combustible mixture are stored in different containers. The fuel is expensive, but the costs are covered by the quiet operation of the unit and the environmental friendliness of the exhaust gases.
How to choose the right proportion?
The petrol cutter is filled with A-92 gasoline. There are other factory instructions that require different gasoline octane number... For example, A-95. The difference in cost is minimal.
The selection of oil does not take liberties. For two-stroke engines, the API sets a specific order:
- for motoblocks, brushcutters, air-cooled mopeds - TA class;
- engines with a cylinder volume of 200 cm³ - TB class oil;
- recommends the use of TC class oils for all-terrain vehicles and motorcycles;
- yacht engines, hydro scooters, motor boats use TD brand lubricant.
From the above list, the lubricant motor fluid the last two positions are not recommended for use with power trims. The letter designations indicate from which petroleum products the lubricating fluid is made.
Attention:If you buy a product on liquid domestic trading floors, take an interest in the labels on the container. The English words self mix say that self-mixing with gasoline is not required. If the phrase pre mix is \u200b\u200bon the label, you should prepare the combustible mixture yourself.
How to properly prepare the trimmer fuel mixture?
We will tell you how to dilute gasoline with trimmer oil. You should first tackle organizational issues:
- Selection of containers for storing the components of the fuel mixture. Buy metal cans for gasoline. The original packaging is sufficient for lubricating fluids.
- Do not prepare a large volume of a mixture that is flammable in engines, since its structure will be disturbed. Separation into fractions will begin: the heavy will sink to the bottom, and the light will form the top layer.
- Prepare a medical syringe for accurate dosage lubricating fluidto add for thinning to gasoline.
We draw the attention of trimmer owners to one detail. You should not buy lubricants for future use. Buy the volume that will be enough for the upcoming season.
Component ratio
How to dilute gasoline will help a careful reading of the instructions supplied with the brushcutter. Aggregates different manufacturers differ in the volume of fuel tanks and the materials from which they are made. The instructions attached to the units give an accurate answer to the question of how much oil is required per liter of gasoline.
The exact proportion of oil ensures perfect trimmer performance throughout the summer season.
What do two-stroke engines dislike?
When preparing the working mixture manually, it should be remembered that two-stroke engines do not reach their design working power if the proportions of the fuel mixture are violated. The above condition forces the owner of the unit to comply with the proportions. As practice shows, the use of brushcutters with underfilling lubricating product, observed oil starvation engine, which does not allow the unit to be brought to the rated power.
Excess lubricant prevents the engine from developing the required power. When preparing the working mixture, a reasonable question arises, how much oil needs to be mixed in gasoline. Helps to define the exact standard. It is recommended to fill the trimmer with gasoline according to the following mathematical calculation. If the fuel tank holds 5 liters, 1 liter of gasoline is divided by 50. That is, 100 ml of lubricating consistency is poured into the gasoline for the trimmer mower per 5 liters. The owner of the brushcutter gets the ideal fuel in terms of structural composition.
Algorithm of actions
Fuel quality increases with proper mixing of the mixture components. The question arises before the mowing machine, how to breed, in what sequence. When mixing the components, pay attention to whether the containers are cleanly washed. A tiny slurry can stall the fuel supply to the carburetor. The fuel tank should be filled from a special container with a filter device.
The procedure is as follows. Half of the available gasoline is mixed with the volume of the specified amount of lubricant. This is followed by the mixing process.
When the components acquire a homogeneous consistency, 50% of the remaining fuel is poured into the partially diluted gasoline. This is how it is recommended to dilute the trimmer fuel.
Important feature
The prepared combustible mixture for the trimmer enters the combustion chamber of the cylinder in the form of a whitish mist. Gasoline-integrated oil fluid lubricates crankshaft, cylinder walls. Underfilling oil liquid into fuel is fraught with premature wear of trimmer parts and assemblies. Exceeding the norm leads to soot settling on the working parts, which is also fraught with premature technical wear of the brushcutter.
A gasoline mower will serve the owner for a long time, provided that they will not pour any gasoline into the fuel tank, but high-quality fuel.
Conclusion
Today, buying a trimmer is not a problem for yourself. It occurs on mowing if the mower has not prepared the fuel mixture correctly. The motor often stalls unexpectedly, like a blowtorch. We have to start the engine over and over again, pulling on the semi-automatic winding device, popularly nicknamed the "lash".
Video instruction
