Brand of gasoline suitable for specific model tool, usually indicated in the operating instructions. If you ignore the manufacturer's recommendations and fill the tank with fuel with the wrong octane number, over time, the device may simply fail. Trimmers come with two-stroke and four-stroke engines. Their refueling and maintenance differ significantly.
Gasoline trimmers with two-stroke engine
Motor trimmers equipped with a two-stroke engine do not have a separate oil supply system for lubricating rubbing parts. Therefore, they need to be filled not with pure gasoline, but with a mixture of it and motor oil. Remember that the oil must be special, designed for two-stroke engines. Using automotive engine oil may damage the tool.
Trimmers with two-stroke engine should be filled with AI-92 gasoline. Of course, it can also run on higher octane gasoline. But when refueling with AI-95 gasoline, the engine will overheat and run unevenly.
Mix oil and gasoline in correct proportion. If there is too little lubrication, scoring will appear on the surface of the piston and cylinder walls, and then it will collapse. piston ring, and the engine will seize. Excess oil is not so critical, but it will also lead to unpleasant consequences. Carbon deposits will form on the piston and the piston ring will become coked, resulting in a loss of power.
Typically, the proportions of gasoline and oil are indicated in the instructions for the tool. Many manufacturers prescribe a ratio of 50:1 - one part of oil is poured into 50 parts of fuel. Therefore, for one liter of fuel there should be 20 ml of oil. If the engine is worn out or the tool is working with high load, the amount of lubricant can be increased to 25:1 by pouring 40 ml per liter of gasoline.
Gasoline trimmers with four-stroke engine
Trimmers powered by a four-stroke engine have more complex device. Gasoline and oil are poured into different containers, from where they are then supplied to the engine. In such models you cannot use lubricant intended for two-stroke engines.
Gasoline for a trimmer with such an engine should be AI-92 or AI-95. It is not recommended to use fuel with a lower octane number - this will lead to unstable work engine.
Many trimmer manufacturers strongly advise using fuels and lubricants, released under their own logo. They often stand more expensive than analogues sold under other names. Is it worth overpaying for branded oil?
Companies that manufacture gasoline tools do not produce fuels and lubricants. They purchase these products from companies involved in the production of oils, and then pack the lubricant in containers with their symbols. So you can safely buy suitable oil any manufacturer. The main thing is that it matches the engine parameters.
Tip 2: What trimmer oils should you use?
In order for the trimmer to serve faithfully for a long time, it is necessary to take a serious approach to its maintenance. One of the important aspects Maintenance trimmer is the choice of engine oil.
Trimmers have become indispensable assistants in many garden plots. They are capable of performing the functions of a whole range of hand-held garden tools used for cutting grass, trimming bushes or trees, and even removing snow. Modern mechanisms characterized by reliability and long service life, which also depends on the application the right type oils Owners of gasoline saws and similar units will not have any difficulties servicing the trimmer: most use the same oil.
For two-stroke engines
Most trimmers have a two-stroke engine, which, although it has a simple design, still requires close attention during maintenance. To refuel two-stroke engines, a mixture of gasoline and oil is used in a certain proportion. It is this ratio that plays a decisive role - it must be clarified when purchasing a trimmer. As for oil, almost any lubricant marked 2T is suitable. Of course, manufacturers expensive instrument require the use of fuels and lubricants according to the established specification, but for most trimmers oils such as Mobil 2T+, Liqui Moly Motorrad 2T or Castrol Power1 Racing are suitable. The average amount of oil added is about 20 g per 1 liter, however, over time, the amount of lubricant can be determined experimentally by the presence of soot on the spark plug and the degree of contamination of the carburetor.For trimmers with a four-stroke motor
Four-stroke engines have a separate tank for filling oil. Such power units are more sensitive to oil quality than two-stroke ones, although there should not be any special problems with servicing trimmers with a four-stroke engine. For inexpensive trimmers, the Mannol Quad or ZIC 4T line of oils is well suited. For trimmers that have been in use for more than three years, it is recommended to fill them with oil with cleaning and restoring additives. In this case, you can use XADO Atomic Oil 4T, which contains a whole complex of additives and has a high viscosity - 10W60. In most cases, semi-synthetic oils of medium viscosity 10W40 from medium price category.Is an oil change required?
If the trimmer does not experience extreme loads during operation, the service life of the oil is approximately comparable to the service life of the engine itself. Often all that is required is monitoring the level and timely adding oil. However, the condition of the engine lubricant must be monitored from time to time for blackening, the presence of suspension and other signs of aging. In these cases, it is recommended to change the oil completely.Most frequently asked question which our clients ask us after purchasing a chainsaw or trimmer is “How to properly dilute gasoline with oil?”
When cooking fuel mixture for a two-stroke engine, regardless of what it is on, a chainsaw, a trimmer, a motor pump or a small tiller. There are a few basic things you need to know.
1) Octane number of gasoline and its quality
2) Oil type, oil manufacturer
3) In what proportion is gasoline and oil mixed?
1) Octane number of gasoline and its quality
Fuel (gasoline) must have an octane number of at least AI92. Many manufacturers recommend AI95, but! because this quality of this gasoline at our gas stations leaves much to be desired, which is why almost all service centers For the repair of gasoline equipment, it is recommended to use only AI92. It is also not recommended to use old gasoline, the one that has stood in a canister or in a tank for a long time. Gasoline for preparing a high-quality fuel mixture for two-stroke engines must be fresh; old gasoline that has been sitting for a long time loses its properties and the octane number drops. You can start the engine with this gasoline, but the engine will not develop full power and prolonged or frequent use of such fuel will lead to failure of your equipment and expensive repairs, even if your instrument is “new”; such cases are often considered not covered by warranty.
2) Oil type, oil manufacturer
To prepare the fuel mixture for 2-stroke engines, special oils for 2-stroke engines are used; in no case should you use oils for 4-stroke engines, automobile oils. When using oils for 4-stroke engines in 2-stroke engines, the latter very quickly fail, and most often after this repair is not advisable, because The entire piston group along with the cylinder is being replaced. The manufacturer of the oil does not really matter, the most important thing is that it is specifically for 2-stroke engines.
3) In what proportion is gasoline and oil mixed?
Before preparing the fuel mixture, it is recommended that you read the operating instructions for your tool and recommendations for preparing the fuel mixture. if this data is not available, the instructions are lost, then it is recommended to prepare a fuel mixture in a ratio of 1:30, namely 30 ml of oil per 1 liter of gasoline; for ease of measurement, buy a syringe at the pharmacy. It is very important to follow all recommendations for proportions. Lack of oil in gasoline leads to overheating piston group and cylinder, as a result of which thermal scuffing appears on the piston and cylinder, resulting in tool failure and expensive repairs. If the oil in gasoline is higher than normal, this also leads to negative consequences, carbon deposits form and the engine fails; repairs will also not be cheap; in both cases, most often it is a replacement of the CPG.
Preparation of the fuel mixture for 2-stroke engines of trimmers and brush cutters.
According to statistics, more than 50% of breakdowns of two-stroke engines of trimmers and brush cutters are associated with the use of a low-quality fuel mixture. Fuel for two-stroke engines is a mixture of gasoline and oil, supplied to the engine through the carburetor in the form of a gasoline-oil mist and provides lubrication to the bearings and piston group. Since during the operation of a two-stroke engine, oil burns together with gasoline, the requirements for such oil differ significantly from the requirements for motor oil used in 4-stroke (for example, automobile) engines. First of all, oil for 2-stroke engines should burn as completely as possible without leaving carbon deposits and provide good lubrication during 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 act as an abrasive, erasing the coating and causing “scoring”.
Taking into account the high demands placed on modern two-stroke engines, many large manufacturers trimmers and brushcutter, such as Stihl or Husqvarna, are testing, developing formulations and producing oils under their own brands. By carefully selecting additives for the base oil, manufacturers ensured excellent engine lubrication at high speed and temperature, significantly reduced the flash point of oils and ultimately the most complete combustion.
How to mix (dilute) gasoline and oil for 2t engines.
Let us summarize the above. Use oil for your branded equipment that is developed or recommended by the manufacturer of this equipment. For example, for a Stihl FS 55 brush cutter, use Stihl HP oil (see Figure 1a) or Stihl HP SUPER; for a Husqvarna 128R brush cutter, use Husqvarna HP oil (Figure 1b) or Husqvarna LS+. For 2 -stroke engines do not use motor oils for 4-stroke engines, such as 10W30, SAE 30, etc.
Picture 1 Husqvarna a-oil(Left) , Stihl used oil (right)
Never use 2 stroke oil designed for water-cooled engines, since 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 the mixture (up to 1 liter), it is very important to carefully measure the amount of oil included in 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 precise dosing.
The preparation of the fuel mixture must be done in a clean container specially designed for this purpose. (see Figure 2)
Plastic cans intended for gasoline are always marked with a “flame” sign. It is very convenient to use a canister equipped with a system spill-free refueling(see Figure 3). The no-spill refueling system has a valve that prevents fuel from spilling when the tank is completely filled.
Figure 3- Spillless filling system
Which oil is better to choose for outboard engines?
Also note that if these oils cannot be used for preparing gasoline mixtures for boat motors. 2t outboard motors must be filled with a mixture prepared from gasoline with an octane number of at least 89 and ultra-pure oil with detergent additives marked NMMATC-W3 in a ratio of 1:50 per operating mode, and, 1:25 for break-in mode (first 5-10 engine hours). Choice quality oil- the basis of engine operation, therefore each manufacturer recommends pouring certain types of oil into the equipment, thereby guaranteeing the most long term product services. So for outboard motors (both 2t and 4t) the tohatus service center recommends using German motul or American quicksilver oils. For Mercury outboard motors it is necessary to use exclusively engine oil quicksilver. For boats honda engines The most preferred brands are motul and statoil.
Today there are few people left who use a regular scythe in their garden. This "old-fashioned" method practically never occurs. And many already have no idea how to handle it, sharpen it and rivet it. With the development of technology, devices called trimmers appeared.
What types of trimmers are there?
There are two main types of such devices. These are gasoline and electric. From the name it is clear that their main difference is the power source. Each type has both advantages and disadvantages. The advantage of gasoline ones is the absence of a power cord, which does not limit the owner’s movement around the site during work. The electric one needs a 220 V network for power. There is no way to do this without an extension cord, which will constantly get in the way and get under your feet.
A modern fuel-powered trimmer, thanks to the presence of various replaceable heads, has transformed from an ordinary scythe into a small-scale mechanization tool with many functions. By installing the appropriate attachment, it will not be difficult for the owner to form a crown for shrubs on his personal plot. In snowy winters it can be used as a snow blower. Replacing the trimmer working heads itself will not take much time and can be done either with or without the use of tools.
Which trimmer oil to choose?
When using a device such as petrol trimmer, its maintenance is particularly difficult. When it comes time to change the oil, many people do not know what oil to put in their trimmer.
In each individual case, it all depends on the type of trimmer engine. For the most part, these are similar, only more power, are used in the production of mopeds. Therefore, it is necessary to use oils for trimmers that are marked 2T.
In most devices of this kind, oil is poured along with gasoline. Therefore, the owner must know the ratio of gasoline and oil when using a trimmer. In most cases, take 20 g of oil per liter of fuel. Moreover, the higher the quality of the fuel, the lower its consumption.
There are also 4-stroke engine models for trimmers. In these types of trimmer oils are poured into a separate container, which does not cause any particular difficulties. One of the main advantages of these devices is their low noise level, which allows you to work without headphones. Oils for trimmers are marked 4T, which is something you must pay attention to.
Advantages and disadvantages of gasoline trimmers
Thus, to summarize the above, it is necessary to note the main advantages and disadvantages of gasoline trimmers. The advantages include:
The disadvantages include:
- greater weight;
- The amount of noise produced during operation is greater than that of electric ones. Despite this, the number of gasoline trimmers in summer cottages is only increasing.
Buy good technique for your site does not mean getting the maximum from it. When it comes to cutting hair, the most convenient solution is often to buy a gas trimmer or lawn mower. However, the service life of such equipment largely depends on proper operation. Below we will touch on the question of what oil to add to gasoline for a trimmer, and why this should be done at all.
Consequences of pouring gasoline into a trimmer without oil
What exactly is the engine inside your trimmer: a piston that makes a power stroke only through an act, while the cylinder is lubricated with oil mixed with gasoline. The following picture emerges: when gasoline burns, all combustion products are removed due to compression, and the remaining oil prevents the friction force from damaging the parts.
As a result, diluting gasoline with trimmer oil is very important, as this is the key to the long life of the equipment. Otherwise, the cylinder may simply cycle, resulting in the equipment burning. But at the same time, it is important to know what proportion of oil and gasoline is needed for the trimmer, because excess will also lead to a decrease in power as a result of a drop in compression.
What is the proportion of oil and gasoline for a trimmer?
Before mixing gasoline with trimmer oil, you should carefully read all instructions from the manufacturer. We need motor oil. The ratio of the two components ranges from 1:20 to 1:50. It is important to strictly follow the recommendations specified in technical specifications to prevent oil starvation of the engine.
If you are advised to dilute gasoline with trimmer oil 1:20 or 1:40, put this oil back, since too wide a range indicates low quality products. If you use a product like this, you are almost guaranteed to lose power.
You can without a doubt mix gasoline with oil for a trimmer, type M-8, since almost all trimmers have low speeds, and it is difficult to encounter an excess of lubricant. Due to the low speed, even relatively inexpensive oil will not cause equipment failure. But what is really worth knowing are not entirely legal service failures. The fact is that equipment manufacturers often recommend certain brands of oil for it. But even if you use oil from another manufacturer, you do not have the right to refuse warranty repairs. Unscrupulous service centers sometimes cite this reason and refuse, although they have no legal right to do so.