How much oil to put in your weed trimmer per liter of petrol?
Gasoline mowers. quite common tools, used by owners of garden and homestead farms for mowing grass and making hay. common tool names are the terms “grass trimmer” and “lawnmower”. The main difference lies in the design of the motor. expensive segment of the devices are equipped with four-stroke models, and the cheapest. with two-stroke. The latter option has advantages, including a small weight, ease of use, as well as a low cost.
The most important condition for the work of two-stroke models is the preparation of the fuel mixture, based on the manufacturer’s defined proportion of gasoline and oil. The simplified design of the motor does not provide a separate channel for lubrication, so 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 prepare the mixture correctly and what it can affect.
Choice of gasoline for grass trimmer
For some reason everyone prefers to choose a brand of gasoline for brushcutter at his discretion. This is an erroneous approach, because, first of all, you should carefully study the instruction manual, which gives the manufacturer’s recommendations on the type of fuel. But this is not a guarantee, because unleaded fuel can be sold under different brands (which differ in many manufacturers), with significantly different composition. Therefore, it is necessary to be guided by the main characteristics in order to choose gasoline for a particular model of grass trimmer.
Petrol tool manufacturers recommend using gasoline brand AI-92, but more expensive types will need fuel with a higher octane number. AI-95. Any brand, which figures in the marking of 90 or less for gasoline scissors are not suitable, because it leads to rapid wear and tear. The problem is due to unscrupulous fuel producers who sell under the guise of 92-something quite another brand. The following situation arises:
- In the passport on the gasoline equipment is recommended to use gasoline with an octane number not lower than 92;
- The conscientious owner goes to the gas station where the lowest price is and with a clear conscience pours such fuel into the brushcutter;
- As a result, the service life is reduced, because often under the guise of AI-92 sold AI-80 and AI-76.
To avoid such a situation, you need to choose one filling station, where it sells proven gasoline (this can be determined by the reviews of regular customers). It is also important where to pour fuel after purchase. only metal containers should be used for this (plastic is forbidden).
Preferably, when it is possible to buy gasoline for grass trimmer high purity specifically for garden equipment. Then you can be sure of its quality and protection against counterfeit.
What to choose oil to fill the grass trimmer or types of lubricants
Grass trimmers and lawnmowers are powered by two-stroke engines, which have a simplified design. Rarely, but there are models of trimmers with 4-stroke motors that run on pure gasoline. Two-stroke power units do not have a compartment for pouring engine oil (oil sump), which reduces the weight of the tool and its cost. If the rotating parts of an engine are not lubricated, they will end up failing quickly. To prevent this, the grass trimmer is not filled with pure gasoline, but with a mixture of oil. What oil to dilute with gasoline for grass trimmer?
To begin with, let’s remember or find out what types of oils by chemical composition are available:
- Mineral fluids. they are intended for low-power air-cooled machines. This is the cheapest type of engine lubricant
- Semi-synthetics. they are used for air- and water-cooled machinery
- Synthetic. suitable for all types of motors with different types of cooling. They do not require frequent changes, and this type of lubricant is several times more expensive than mineral and semi-synthetic
From the above it follows that any oil composition is good for grass trimmer. mineral, synthetic and semi-synthetic. Oils with different chemical compositions differ in price, so it is necessary to rely on the recommendations of the tool manufacturer when buying. The manual provides recommendations on which types of oil are best to use. If it is a TC-W3 standard, it does not really matter what the composition of the substance should be. Mineral, semi-synthetic and synthetic oils can be mixed with petrol.
That’s interesting! The main thing when choosing an oil is not to get caught on the counterfeit, because today you can often find different types of lubricating compositions for two-stroke engines, which consist mainly of low-quality petroleum products.
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Features of brushcutter oiling
Depending on the engine, brushcutters are divided into two-stroke and four-stroke engines. In the first case, the piston in the internal combustion engine makes 2 strokes per working cycle, and in the second case, it makes 4 strokes. Differences in the working principle of the engine cause different approaches to filling the trimmer for grass.
Fueling a brushcutter with a two-stroke engine
As a rule, a two-stroke engine is used in conventional brushcutter models. The lawnmower does not need much power or agility, so it is well suited for the task at hand. The two-stroke engine is also much cheaper and simpler. but it is fueled with a fuel mixture of oil and gasoline. This fuel is filled into the carburetor and fed to the cylinder in the form of a petrol-oil mist. The oil is thereby used to lubricate all necessary parts. However, the mixture burns and emits a strong smell and smoke, which increases the toxicity of the exhaust fumes.
Important! You should use special oil for two-stroke engines for these brushcuts, which burns completely without leaving any residue and has a low evaporation rate. The engine oil contains 20% solvent to ensure that it mixes well with petrol.
Gasoline for brushcutters with four-stroke engines
Four-stroke engines are used in professional brushcutter models. They give you plenty of power and run for a long time without stopping or refuelling. The engine also uses gasoline and oil as fuels, but the oil and gasoline tanks are separate. The engine oil is not part of the combustion process, making the exhaust fumes less toxic.
Just for note! In addition to better environmental performance and less heat, four-stroke brushcutter engines are also more economical. They use much less fuel, with savings of up to 50% on gasoline and up to 80% on oil.
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How to choose your petrol
Before you buy fuel for your brushcutter, you need to read the manufacturer’s manual. It specifies the varieties and grades of fuel that can be used for a particular model of grass trimmer. In general, when selecting gasoline, you should be guided by the brand A-92. To refuel the brushcutter is suitable and A-95, although some experts do not recommend taking fuel with such an octane number. This is explained by the fact that many gas stations in Russia include in the composition of such gasoline additives and solvents (eg, alcohol). To reduce the service life of your brushcutter, you should buy only high quality fuel from reputable providers.
How to properly pour diluted fuel into a two-stroke motor
Many people do not follow some important recommendations for filling the gas tank of a grass trimmer or lawn mower, which eventually leads to unpleasant consequences. Let’s consider important recommendations on how to properly pour diluted fuel from gasoline and oil into the trimmer’s gas tank:
- Use a fuel filler funnel or filler can. Despite the large diameter of the petrol tank opening, very often when you try to get into it, some of the fuel will spill and end up on the body of the tool. Fuel on the tool can cause ignition when heated, so it is very important to use a funnel or watering can
- Before unscrewing the cap, the surface of the tank should be thoroughly cleaned as dirt can get inside and cause the gasoline filter to clog quickly
- Fuel filling operations must be carried out in calm weather or in a secluded place to prevent dust and small grains of sand from entering the tank
- Do not leave the fuel filler hatch open for a long time, because not only small grains of sand and dust, but also insects can get into it
- Do not inhale gasoline fumes while pouring, as they are dangerous to humans. Wear safety glasses, ear muffs and a respirator when using a trimmer
- Fill the tank up to the mark. If you fill up the tank, when you screw in the cap, some of it will spill out. not an economical use of fuel. In this case it is better to underfill than overfill
Considering these recommendations, you can significantly extend the life of the gasoline tool in question.
This is interesting!It is also recommended to wear protective gloves when mixing and pouring fuel.
For two-stroke engines
Most trimmers have a two-stroke engine, which has the simplest construction, but still requires close attention when servicing. Two-stroke engines are filled with a mixture of gasoline and oil in a certain proportion. This is the ratio that plays a decisive role. You should always check it when buying a grass trimmer. As for oil, practically any grease marked 2T is suitable. Of course, the manufacturers of expensive tools require the use of fuel and lubricants on the established specification, but for the majority of trimmers are suitable oil such as Mobil 2T, Liqui Moly Motorrad 2T or Castrol Power1 Racing. Medium oil additive portion. about 20 g per 1 liter, but over time, the amount of lubricant can be determined experimentally by examining the presence of carbon deposits on the spark plugs and the degree of contamination of the carburetor.
Four-stroke engines have a separate oil reservoir. Such power units are more sensitive to oil quality than two-stroke engines, although special problems with maintenance of trimmers with a four-stroke engine should not arise. For inexpensive trimmers is well suited line of oils Mannol Quad or ZIC 4T. Trimmers that have been in use for more than three years should use an oil with cleaning and repairing additives. In this case, you can use oil XADO Atomic Oil 4T, which contains a range of additives and is characterized by increased viscosity. 10W60. Semi-synthetic oils of medium viscosity 10W40 from the medium price range are suitable for trimmers in most cases.
Does the oil need to be changed??
If the grass trimmer is not under extreme stress, the life of the oil is roughly comparable to the life of the engine itself. Often you just need to check the level and add oil in time. However, the condition of the lubricant in the engine should be checked from time to time for blackening, sludge and other signs of aging. In these cases it is advisable to change the oil completely.
The authors who replied correctly noted that there is a big difference in gasoline brands used for two and four strokes. I don’t take into account electric trimmers. By definition, they only use lubricants for the moving parts of the actuator.
Without going “behind the furnace” I can tell you from my own experience that for two-stroke engines the actan number of gasoline should be less than for four-stroke engines. I had the experience of operating a Makita four-stroke grass trimmer on 92 gasoline. The owner of grass trimmer for grass againA used 92 gasoline, though the manufacturer recommended gasoline of 95 and higher. But all other exploitation fluids were used in strict accordance to the manual (engine crankcase oil (for crankshaft)) I also tried it for a while and realized that. Bottom line. Traction is lousy, way below manufacturer’s claims, consequently more rpm and heating too, gasoline is not burnt completely, muffler deposits are constantly increasing. Took it home to drive, put gasoline of 95, and the machine went. it doesn’t warm up, it has the same acceleration as on gas. you can put your hand on the cylinder and not get burned. Conclusion. It’s better to use at least 95 gasoline for four-stroke trimmers.
For two-stroke trimmers. It’s just the opposite. in what proportions do not dilute 95 gasoline with oil, additives are present in it (and in Russia by definition there is no “pure” 95th gasoline at all). it is the same 92 additive package), it is impossible to neutralize it with oil and therefore the detonation component cannot be excluded. Besides, a two-stroke engine, working off every cycle of the piston stroke to ignite the working mixture, is heated on high-octane gasoline much stronger, since its combustion temperature is higher. Which leads to increase of natural expansion of metals and, logically, to reduction of clearance in the mating parts (piston group, bearing shells and balls, etc.).п.) The four-stroke engine “works off” every second stroke in the operating mode (ignition of the working mixture). by the cooling system operation principle, it is also possible to say that the 92-th gasoline is more recommended for two-stroke engines with the air cooling system.
The oil proportions for any of the motor types should first of all be looked at in the product datasheet. One should understand that a four-stroke engine needs oil in the engine crankcase only, but a two-stroke engine needs mixture of petrol and some oil. The proportions for oil and gasoline for each trimmer model!) in the product datasheet. I can only give you the guaranteed oil and gasoline ratio for STIHL and Huter two-stroke motor trimmers. During the running-in period and during operation, if you use our (Russian) gasoline, dilute 25 milligrams of oil per liter of 92 gasoline. My STIHL 180 and my Huter weed trimmer have been running on these ratios for more than 3 years. normal flight. The proportions given by the STIHL engine manufacturer. 50/1 is not for our gasoline but for European 87-90 grade, which comes out of the distiller as such, without adding anti-detonation and eco additives.
The two-stroke engines work on gasoline and oil blend. The main cause of malfunctions is that the fuel mixture is mixed incorrectly or that there is no oil in the fuel. When preparing the fuel mixture, use special oil for two-stroke engines marked “For garden equipment”. Do not use oil for boat engines, motorcycles, etc. The gasoline/oil ratio may vary depending on the engine model, oil grade and gasoline tool manufacturer’s recommendations. Two-stroke engines use ratios of 50:1, 32:1 and 24:1.
Never store gasoline in plastic water containers. When mixing the fuel mixture, a static charge builds up and you can “catch” a spark.
That is why gas stations do not allow you to fill up gasoline in plastic cans, only in metal cans. Before pouring gasoline into a metal canister, it is better to put it on the ground, so it removes static from the body.
But there are situations, when the simple manipulation with the brushcutter is not helpful. The engine still will not start. In this case we check the power and ignition system, following the rule “the engine does not work if there is nothing to burn or to ignite”.
The chain saw likes cleanliness. It is necessary to keep the air filter and fuel clean. It is better to leave gasoline, bought at petrol station, for 2 days and pass it through the easiest filter. a piece of baize cloth.
Electric equipment is checked in the following way:
Unscrew the spark plug and check the electrode gap. it is possible to “grandfather’s” way of setting the right gap between the electrodes. We take a razor blade, break it in half and insert a home-made probe between the electrodes. If the blades go in tightly, the gap is perfect.
We put the cap of the high-voltage wire on the spark plug and lean the spark plug against the metal surface of the engine. yank the starter a few times. If the spark is good at one point, the gap is adjusted correctly. If not. the spark is weak or “wandering”, you need to re-adjust the electrode gap.
The spark plug likes cleanliness. The air filter and fuel must be clean. It is better to leave gasoline, bought at the gas station, for 2 days and pass it through a simple filter. a piece of baize cloth.
Check the electrical equipment as follows:
Unscrew the plug, inspect the gap between the electrodes. Set the correct gap between the electrodes can be “grandfather’s” way. Take a razor blade, break it in half and insert a homemade dipstick between the electrodes. If the blades enter tightly, the gap is perfect.
Put on cap of high-voltage wire and lean it against metal surface of engine. Yanking the starter a few times. If the spark strikes well in one point, the gap is adjusted correctly. If not. the spark is weak or “wandering”, you need to re-adjust the gap between the electrodes.
There may also be a punctured ignition coil in the electrical system. In this case the lawnmower does not start or starts and works intermittently, and then shuts down or does not start on a “hot” condition at all.
You can check the coil in the same way as you check the spark: unscrew the spark plug, lean it against the body of the grass trimmer. If there is no spark when the starter jerk, or it appears intermittently. you need to change the coil.
How to dilute the gasoline can be done by carefully reading the instructions that come with the brushcutter. Machines from different manufacturers have different fuel tank capacities and materials. The instruction manuals attached to the machines provide the exact answer to the question about how much oil to use per liter of gasoline.
Precise oil proportion guarantees perfect operation of the grass trimmer during the summer season.
What two-stroke engines don’t like?
When preparing the fuel mix manually, remember that two-stroke engines fail to produce full power if the fuel mix is out of proportion. The condition given forces the owner of the machine to observe the proportions. As practice shows, the use of brushcutters with an underflow of lubricating product, oil starvation of the engine is observed, not allowing to bring the unit to the normative power.
Too much lubricant prevents the engine from developing the required performance. When you’re getting the working mixture ready, the question arises as to how much oil to mix in petrol. Helps to determine the correct standard. It is recommended to fill the grass 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, for 5 liters of gasoline for the grass trimmer mower, pour 100 ml of lubricating consistency. Provides the brushcutter owner with the ideal fuel texture.
Features of the filling of brushcutters
In order for the mixture to be properly distributed in the fuel system of the device, you need to follow a simple instruction. How to properly fuel a gasoline trimmer for grass:
- Place your brushcutter on a flat surface with the filler neck up and fill in the correct amount of fuel;
- Do not fill the grass trimmer excessively, check the fuel level at the top mark;
- Do not spill fuel on the ground or on the body of the tool;
- Before starting the engine, keep a safe distance from the fuel containers;
- If there is old fuel in the tank, empty the tank completely before refueling.
Fueling a brushcutter with a two-stroke engine
To refuel gasoline trimmers of this type, follow the instructions already described. Keep a strict oil ratio and do not spill oil on the body of the tool. Make sure that the gas tank is not overfilled, because then the engine will not work steadily.
Fueling a brushcutter with a four-stroke engine
The main difference is that grass trimmers with this type of engine are not filled with a mixture of oil. It is necessary to fill separately AI-92 and engine oil. The general rules for filling the tank are similar to those already described above.
What to choose oil to fill in the trimmer for grass or types of lubricants
Grass trimmers and lawnmowers are powered by two-stroke engines, which have a simplified design. Rarely, but there are trimmer models with 4-stroke engines, which run on pure gasoline. Power units of two-stroke type have no compartment for filling the engine oil (oil sump), thereby reducing the weight of the tool and reduce their cost. If the rotating parts of the engine are not lubricated, they will break down quickly. To prevent this, the grass trimmer is not filled with pure gasoline, but with a mixture of oil. What oil to dilute with gasoline for grass trimmer?
To begin with, let’s remember or find out what types of oils by chemical composition are available:
- Mineral fluids. designed for low-power, air-cooled machinery. This is the cheapest type of engine lubricant
- Semi-synthetics. they are used for machinery that has air and water cooling
- Synthetic. suitable for all types of engines with different types of cooling. They do not require frequent changes, and this type of lubricant is several times more expensive than mineral and semi-synthetic
From the above it follows that for the grass trimmer is suitable oil with any composition. mineral, synthetic and semi-synthetic. Oils with different chemical composition differs in price, so rely on the recommendations of the manufacturer of the tool when buying. The instructions indicate the advisory information about what types of oil are better to use. If it is a TC-W3 standard, it is not so important what the composition of the substance should be. Mineral, semi-synthetic and synthetic can be diluted with gasoline.
That’s interesting!The main thing when choosing oil is not to get caught on a counterfeit, as today you can very often find different types of lubricating compositions for two-stroke engines, which consist mainly of low-quality petroleum products.