How much oil to pour into the grass trimmer per liter of gasoline
Gasoline mowers are quite common tools used by owners of garden and homestead farms for mowing grass and making hay. common names for tools are the terms “grass trimmer” and “lawnmower“. The main difference is hidden in the design of the motor. the expensive segment of the devices is equipped with four-stroke models, and the cheap ones. with two-stroke models. The latter option has advantages, including a small weight, ease of use, as well as low cost.
The most important condition for two-stroke models is to prepare a fuel mixture based on the proportion of gasoline and oil determined by the manufacturer. The simplified design of the motor does not provide a separate channel for lubrication, so the engine oil is added directly to the gasoline. Violation of the correct proportion leads to a significant reduction in the resource of the tool and even to its failure. Let’s understand what composition is required for gasoline trimmers, how to properly prepare the mixture and what it can affect.
What kind of gasoline can you put in a grass trimmer??
Before deciding which gasoline can be put in the trimmer for grass, you need to define some of the concepts used.
- You can cut the tabs with a four-stroke or two-stroke engine. Four-stroke grass trimmers. This is a powerful and complex structure, the lubrication of parts of her motor is carried out by an oil pump. The engine runs on pure gasoline. For two-stroke units. common. The necessary preparation of a fuel consisted of gasoline and oil. Due to the amount of oil in the fuel, the rubbing parts in the cylinder of this engine are lubricated.
- To make the consistency requires gasoline of a certain class AI-95 or AI-92. The gasoline brand depends on the combustion rate. Octane number. The lower the index, the faster the gasoline burns and the higher its flow.
In many models of gasoline cutters is a two-stroke engines that run mainly on gasoline AI-92. Fuel for them must be combined without the help of others. It is better to fill the gasoline brand specified for him by the manufacturer, otherwise grass trimmer will fail sharper. For example, the gasoline AI-95 engine quickly overheated, and when you select AI-80 fuel mixture has very low quality, because the engine will run unstably and with low power.
Not counting the brand of gasoline, preparing the fuel mixture for the shieldkorizirov, it is necessary to use special oil, designed specifically for two-stroke engines. Semi-synthetic and synthetic oils are great for lawn trimmers. Semi-synthetic oils are of medium price range, suitable for such equipment of any manufacturer, they perfectly lubricate the necessary elements of the engine. Synthetic oils are more expensive, but they will hold the engine longer. In any case, when buying equipment, you should carefully read the annotation, because from time to time the manufacturer gives advice on the use of certain brands of oil.
What is the best oil to choose for your outboard motor?
Also note that if these oils can not be used for the preparation of gasoline mixture for boat engines. 2T boat motors require a mix of gasoline with octane number not less than 89 and high-purity oil with detergent additives, marked NMMATC-W3, in proportion of 1:50 to work mode. 1:25 for the running-in period (first 5-10 engine hours). Choice of quality oil.the basis of engine operation, so each manufacturer recommends pouring certain brands of oil into machinery, thereby guaranteeing the longest service life of the product. So for the boat motors (both 2t and 4t) tohatus service center recommends to use german motul or american quicksilver oils. For mercury outboard engines it is necessary to use only quicksilver motor oil. For Honda boat motors the preferred brands are motul and statoil.
It is not recommended to use the fuel mix if more than two months have passed since its preparation.
Rules for Selecting Gasoline
Before you buy fuel for your brushcutter you should get acquainted with the manufacturer’s instructions. It specifies the fuel brands and grades of fuel you can use for your grass trimmer. Generally, when choosing gasoline you should be guided by the A-92 grade. A-95 is also suitable for filling your brushcutter, although some fuel specialists advise against fuel with this octane rating. This is explained by the fact that at many gas stations in Russia such gasoline includes various additives and solvents (for example, alcohol). To reduce the service life of your brushcutter, it’s best to use quality fuel from a trusted supplier.
Figuring out which gasoline for the lawn mower AI-92 or AI-95
So many people, so many opinions, which applies not only to the choice of oil for the grass trimmer, but also gasoline. Similarly, in order not to make a wrong choice, it is recommended to use gasoline of the brand recommended by the manufacturer (indicated in the instruction manual of the tool). However, it is not that simple, because at each gas station gasoline brands are only called the same, but have a completely different composition. Need to understand, and come to a single conclusion about what brand better to fill the gasoline in a two-stroke engine for your trimmer for grass.
Manufacturers recommend using A-92 gasoline for their equipment, and some models require the use of A-95, which do not contain ethanol. It is not recommended to use AI-90 gasoline or lower, as it will cause rapid wear and tear of the engine parts. if you buy only one brand of gasoline, you cannot be 100% sure that it is the right one. The result is the following picture:
- The manufacturer recommends filling the grass trimmer fuel brand AI-92
- A gardener uses only gasoline of this brand, but buys it at filling stations where the price is lower or where it has to
- This negatively affects the internal parts of the motor, as at one gas station. it is really high quality gasoline AI-92, and at the second. at best if it is AI-80, not AI-76
As a result, the engine suffers, and after a couple of years of operation of the new trimmer for grass necessitates its overhaul. In order not to have to analyze the quality of fuel or buy only expensive gasoline, it is recommended to fill only one gas station. Gasoline is only filled into metal canisters at gas stations, not plastic canisters.
There are manufacturers who produce special purified fuel for two-stroke engines. If you choose this option, then you don’t need to choose the best filling station, brand of gasoline, and monitor its storage time.
Conclusion on the choice of gasoline for grass trimmer!
The grass trimmer must be filled with gasoline of the brand recommended by the manufacturer. If you fill the tank of trimmer for grass gasoline A-95, instead of A-92 (which is recommended by the manufacturer), then the engine will warm up faster and work unstably. It is also better to choose gasoline A-92 Ecto, which has better characteristics in terms of environmental friendliness.
Choosing the right fuel
Most lawn trimmers run on gasoline. There are also diesel, but we will not talk about them in this article. The following brands of petroleum products are sold at gas stations:
N-80 is no longer produced and is seldom used. The octane number (the number after the letters) shows how resistant the fuel is to detonation. The higher the value. the greater resistance to self-ignition in compression. Gasoline AI-92 is more prone to detonation than AI-95. In the manufacture of lawnmower motors the manufacturer takes into account the resources of parts and the maximum permissible detonation. The instruction to the tool specifies what gasoline to use.
Compliance with the recommendations extends the life of the lawnmower. If you fill the tank with gasoline of lower octane rating than indicated in the passport. the piston group will break down quickly. Using fuel with a higher value is also detrimental to the engine. In Russia there is no opportunity to increase the octane number by improving the process of distillation of oil. That is why oil refineries add chemical additives to fuel. Detonation resistance increases and so does combustion time. The result is soot on the spark plugs, rings and cylinders.
Special features of lawnmowers
Engine oil in the lawnmower engine is distributed by the crankshaft: it is scooped out of the crankcase and sprayed onto the parts. Due to this design, the viscosity of the grease should be sufficient to retain the oil film on the parts, at the same time it should not be too thick so as to interfere with the movement of parts or form a hard crust.
On the other hand, lawn mowers operate mostly at positive ambient temperatures and the load on their engines is not as severe as for car engines. Lawn mowers most often do not need a “cold start” in the cold, which greatly reduces the life of the car engine and requires low-temperature properties of the lubricant.
Even vice versa, lawnmowers are usually air-cooled and therefore their engine temperatures can be higher than those of liquid-cooled car engines.
The first filling is designed for running-in of the engine. after five hours of work it is replaced, and then the new lubricant can be used for the whole season. In the future, the replacement is done according to the regulations after a certain number of moto-hours, or they drain it at the end of the dacha season and pour a new one for the next year.
Peculiarities of two- and four-stroke engines
In principle, a two-stroke engine is similar to a four-stroke. The only feature will be that the stroke of a two-stroke motor is made in 2, and the four-stroke. In four cycles. The latter is understood as a downward or upward movement of the piston. In this case there are two cycles per one revolution of the crankshaft. stroke of the piston. This is its movement during which the energy of the gases formed as a result of combustion of fuel is converted into useful work of the motor (its rotation).
Structurally and operational features of the two and four-stroke ICE models differ from each other in the following aspects.
- Two-stroke engines have a higher specific power and liter (approximately 1.5 ÷ 1.8 times).
- Lubrication method.
- Four-stroke engines are characterized by the highest fuel efficiency (fuel consumption by about 20 ÷ 30% less), and their emissions contain fewer toxic substances
- Method of feeding fuel mixed with atmospheric air into the cylinder and evacuating the exhaust gases. Four-stroke engines have a timing mechanism: it opens and closes valves as needed. The 2-stroke models don’t have it.
- Noise levels in operation: 4-stroke units are quieter.
- Complexity of the device: 2-stroke models are simpler.
- The four-stroke models have a longer life due to the improved lubrication system, also since the crankshaft rotates at a lower frequency.
- Sharp acceleration: 2-stroke units accelerate faster.
- For ease of repetitive maintenance and repair, it’s easier to work with a two-stroke engine. It’s also cheaper and weighs less than its four-stroke counterpart.
The absence of a valve timing block makes two-stroke engines lighter and easier to build. Filling of the cylinder with fuel-air consistency and gas purging takes place during expansion and compression through special openings: the inlet (purge) and outlet openings.
Fourth: How does the engine run-in?
Air-cooled engines do not like idling. Start the engine, warm it up for 1-2 minutes. And run in operation. During the breakdown, try to stick to 50-75% load and make sure to take breaks after 20-25 minutes. After the break, when the engine cools down (15-20 minutes) you can continue working again. In this mode, the engine should run for the first 4-5 hours, after which it is imperative to change the oil. Running in Ready.
First: what kind of gasoline to use.
We recommend the use of clean, fresh, no-blanket RON92 gasoline. Air-cooled engines are not designed to run with AI95 and AI98 fuel. AI95 and AI98 gasoline contains additives that are detrimental to the engine piston system, leading to overheating and damage.
Don’t mix oil with gasoline. Doing so may cause damage to the motor that is not covered under warranty.
USE the gasoline AI-92 from the LIVE position thirty DAYS.
Third: starting the engine.
When the engine is started for the first time or when it is cold, the piston system is overloaded. High speeds can damage the engine. That’s why you have to start the engine in the 1/3 throttle position. And you have to run at medium speed.