Running in the engine of a brushcutter. Special features of the lawn mower running-in
It should be noted that the gasoline grasshopper is very simple to operate. It is enough to see how other users use it to start using it to its full potential. Performance of basic technical functions is intuitive and does not require any difficulties in practice. Proper running-in of the gasoline grass trimmer is also not difficult. There is almost no difference between professional and home appliances.
The key difference is the type of motor. On professional equipment, it is more powerful and produces more revolutions. The two-stroke engine is used more often in household models. Four-stroke units are more reliable and give more force, so they are suitable for special conditions, difficult and overgrown areas.
In addition, we must consider whether the supplied cutting attachment.
So, let’s start with getting it ready for work. So how to get a lawn mower in a state of full readiness for use?
First of all, reassemble it if it is disassembled. The detachable boom is securely clamped in the latches. Carefully check the fixation of the cutting equipment, especially if it is a knife or saw blade. Petrol grass trimmers are usually very powerful and have a fantastic rotating cutting attachment. Therefore, a poorly fixed blade, first, can injure the worker, and, secondly, causes additional vibration in the tool, which can lead to its breakdown.
Gasoline models are most often equipped with a two-stroke engine, so they need to prepare a fuel mixture. What is its purpose? Since these motors do not have a crankcase and a separate system for oil lubrication, this role is performed directly by the combustible mixture.
It is prepared in certain proportions and for one filling. Do not dilute several liters at once, with “reserve”, because the composition should always be fresh.
How to fill a trimmer for grass
The ready mixture of petrol and oil can be stored for no more than 3 months (pure petrol is stored less). Dilute only enough fuel for several uses of the weed trimmer. In general, prepare:
- Gasoline and oil, which is suitable for two-stroke engines with air cooling system;
- A metal canister and a mixing container;
Adding Oil to Gasoline Dilution Instructions:
- Pour 1 liter of gasoline into a container of suitable capacity and add 1/2 the required amount of oil.
- Stir carefully and keep a good distance from sources of open flame.
- Add the rest of the oil to the fuel and stir everything again.
Grass trimmer fueling process General guidelines for fueling a grass trimmer with a two- or four-stroke engine:
- Position the fuel tank so that the cap is on top, then pour in the required amount of fuel.
- Do not overfill the fuel tank. This will cause one problem: overflowing into the intake manifold and fuel filter, ignition of the fuel, or engine damage.
- Try to pour the mixture so it does not spill. You can do this with a watering can.
- If you spill fuel, wipe it off immediately. Dispose of wiping material, do not accumulate it indoors. it is a fire hazard.
- Start the device after removing the canister with fuel from a distance of more than 10 m.
- If there is a long break between runs, be sure to drain off the old fuel.
How to choose gasoline
Before you buy fuel for your brushcutter, you need to read the manufacturer’s manual. It specifies the grades and grades of fuel that can be used for a particular grass trimmer model. Generally speaking, you should use gasoline of the grade A-92. To fill the brushcutter is suitable and A-95, although some experts do not recommend taking the fuel with such an octane number. This is explained by the fact that many gasoline filling stations in Russia contain additives and solvents (for example, alcohol). To get the long life of your brushcutter, it’s best to choose only quality fuel from a trusted supplier.
Why buy grass trimmers?
When comparing with similar mechanisms, the following functional indicators are given preference when choosing a brushcutter:
- Mobility and low weight of the unit, allowing you to carry it over distances, to use in hard-to-reach places for mowing.
- Versatility. The lawnmower is equipped with a node for changing the working elements directly during the operation of the unit.
- Structural simplicity that allows long use of the scythe without frequent adjustments.
These and other positive characteristics give buyers the confidence that when buying a trimmer for grass, they make the right choice.
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Rules for choosing oil
Motor oil, depending on its chemical composition, is:
- Mineral. made from petroleum distillates and designed for low-power air-cooled machinery;
- Semi-synthetic, which is a mixture of mineral and synthetic oils and is suitable for 2T and 4T, as well as for air and liquid cooling;
- Synthetic: produced on the basis of esters and can be used in heavy-duty equipment and in harsh climates.
Important! Oils for two-stroke and four-stroke engines differ in their ability to dissolve, burn, and evaporate. In order to distinguish liquid grease from gasoline, it is painted in different colors: blue, green, red.
Depending on the API classification, the following groups of oils for trimmer motors can be distinguished:
- TA. for low-power machinery with engine displacement up to 50 cm³ and air cooling;
- TV. for powerful equipment with engine displacement of 50-200 cm³ and air cooling system;
- TS. for powerful two-stroke equipment (brushcutters, chainsaws, lawnmowers, etc.).) with engine displacement of 50-200 cm³;
- TD. for liquid-cooled boat engines.
To choose the best oil for a particular model of grass trimmer, it is better to take into account the recommendations given in the manual. API-TV and API-TC 2T brushcutter oils are generally used.
As a side note! Also for two-stroke engines there is a JASO classification, and for four-stroke engines still use SAE30.
Leading gardening equipment companies design and manufacture their own oils. Such lubricants best meet all the technical and performance specifications of specific trimmer series. For example, for a STIHL brushcutter (STIHL)FS 5 it is best to use STIHL HP or STIHL HP SUPER oil, for a Husqvarna 143R you should use Husqvarna HP or Husqvarna LS oil. But for the Patriot brand is also suitable conventional mineral oil M-8B.
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For two-stroke engines
Most trimmers have a two-stroke engine, which, although it has the simplest structure, still requires close attention when servicing. Gasoline and oil in a certain proportion are used to fill the tank of two-stroke engines. It is this ratio that plays a decisive role. it must be specified when purchasing the grass trimmer. As far as oil is concerned, practically any grease marked 2T is suitable. Of course, the manufacturers of expensive tools require the use of fuel and lubricants according to specific specifications, but for the majority of trimmers are suitable oil such as Mobil 2T, Liqui Moly Motorrad 2T or Castrol Power1 Racing. The average portion of added oil. Approx. 20 g per 1 liter, but over time, the amount of lubricant can be determined experimentally by examining the soot on the spark plug and the degree of contamination of the carburettor.
Four-stroke engines have a separate container for oil filling. Such power units are more sensitive to oil quality than two-stroke ones, although special problems with the 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 degreasing additives. In this case you can use XADO Atomic Oil 4T, which has a whole complex of additives and is characterized by increased viscosity. 10W60. In most cases the medium viscosity 10W40 semi-synthetic oil in the medium price range is good for trimmers.
Do I need to change the oil??
If the grass trimmer does not experience extreme stress in operation, the life of the oil is roughly comparable to the life of the engine itself. Often only level monitoring and timely topping up is necessary. But the condition of engine oil should be checked from time to time for blackening, sludge and other signs of aging. In these cases it is recommended to change the oil completely.
The authors who responded correctly noted that there is a big difference in gasoline grade used for two and four strokes. I don`t take into account the power trimmers. By definition they use lubricants only for moving parts.
Without going “behind the furnace” I can tell you from my own experience that two-stroke gasoline should have a lower actane number than four-stroke gasoline. I had a Makita four-stroke grass trimmer running on 92 gasoline. the owner of the grass trimmer againA used 92 gasoline, though the manufacturer had recommended gasoline of 95 and higher. However, all other operating fluids used in strict accordance with the instructions (engine crankcase oil (for the crank)) I also tried it for a while and this is what I realized. Result. the engine draught is lousy, much lower than the one recommended by the producer, it causes higher revolutions and heating too, petrol doesn’t get burnt completely, the muffler deposit is constantly growing. I took it home for a drive, put some 95-octane gasoline in it, and the car started running. it doesn’t get any heat, it has no inertia, the exhaust is as good as when using gas. doesn’t even smell or smell, you can put your hand on the cylinder and not get burnt. Conclusion. You should use at least 95 gasoline for four-stroke trimmers.
For two-stroke engines. It’s just the opposite. In what proportions do not dilute 95 gasoline oil, additives present in it (and in Russia by definition “pure” 95th gasoline does not exist at all. is the same 92 additive package), it is impossible to neutralize it with oil and, therefore, the detonating component cannot be excluded. Besides, a two-stroke engine, working off every cycle of the piston stroke to ignite the working mixture, heats up much more on high-octane gasoline since the combustion temperature is higher. which leads to an increase in the natural expansion of metals, well logically to a decrease in the clearance in the mating parts (piston group, bearing beads and ball bearings, etc).п.) Every second stroke of the four-stroke engine “works” in the working mode (ignition of the working mixture). According to the cooling system operation principle it can be also said that 92-rd gasoline is more recommended for two-stroke engines with the air cooling system.
The oil proportions for any engine type you should first of all check in the datasheet. Well and of course be clearly aware that a four-stroke oil is poured into the engine crankcase and a two-stroke is prepared by the working mixture of gasoline and oil parts. You need to check the oil and gasoline ratio for each trimmer model (first of all!) in the certificate. I can only quote the guaranteed oil and gasoline ratio for STIHL and Huter two-stroke motor trimmers. During the running-in period and during operation, when using our (Russian) gasoline, dilute 25 milligrams of oil per liter of 92 gasoline. Proportion 40/1 I have been running my STIHL 180 and my Huter weed trimmer for more than 3 years with these oil proportions. I’m in the green light. The lubricant mix ratio as given by the STIHL engine manufacturer. 50/1 is not for our gasoline, but for European 87-90, which comes out of the distiller as such, without adding anti-detonation and eco additives.
Two-stroke engines work on gasoline-oil mixture. The primary cause of malfunction is incorrectly proportioned fuel mixture or no oil in the gasoline. When preparing the fuel mixture, use a 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 power tool manufacturer’s recommendations. Two-stroke engines use 50:1, 32:1 and 24:1 mix ratios.
Gasoline grass trimmers with a two-stroke engine
Mototrimmers, equipped with a two-stroke engine, do not have a separate oil supply system to lubricate the rubbing parts. So they do not need to be filled with pure gasoline, but with a mixture of gasoline and engine oil. Remember that the oil should be special designed for two-stroke engines. Use of automobile engine oil can put the tool out of commission.
Grass trimmers with a two-stroke motor should be filled with gasoline AI-92. Of course, it can also run on gasoline with a higher octane number. But if you fill the tank with gasoline AI-95 the engine will overheat and run rough.
Oil and gasoline should be mixed in the correct proportions. If there is too little grease, piston surfaces and cylinder walls will get scuffed, then the piston ring will collapse and the engine will seize up. Too much oil is not so critical, but will also lead to unpleasant consequences. Piston soot and sludge build up on the piston and piston ring can harden, resulting in loss of power.
Usually the proportions of gasoline and oil are specified in the instruction manual for the tool. Many manufacturers prescribe a 50:1 ratio. One part oil for every 50 parts of fuel. This means 20 ml of oil per liter of fuel. If the engine is worn, or the tool is working with a high load, the amount of lubricant can be brought to 25:1, pouring 40 ml per liter of gasoline.
Gasoline grass trimmers with a four-stroke engine
Grass trimmers powered by a four-stroke engine have a more complicated design. Gasoline and oil are filled into separate containers, from where they are pumped into the engine. Do not use lubricants designed for two-stroke engines.Gasoline for grass trimmer with such an engine must be AI-92 or AI-95. Using fuel with a lower octane rating is not recommended. it makes the engine unstable.
Many trimmer manufacturers strongly advise to use fuel and lubricants produced under their own logo. They often cost more than others sold under other names. Is it worth overpaying for brand oil??Companies that make gasoline tools, do not produce fuels and lubricants. They buy these products from companies engaged in the production of oils, and then packed lubricants in containers with their logo. That’s why you can safely buy a suitable oil from any manufacturer. The main thing is that it corresponds to the parameters of the engine.
What gasoline is needed for the grass trimmer
The owners of villas and homesteads need to constantly monitor the condition of the lawn and mow the grass. One tool for such work is a gasoline grass trimmer. You need to fill it with the right gasoline if you want it to last a long time.
The brand of gasoline suitable for a particular model of tool is usually specified in the instruction manual. If you ignore the manufacturer’s recommendations and fill the tank with fuel with the wrong octane number, over time, the device can simply fail. Grass trimmers are available with two-stroke and four-stroke engines. Their refueling and maintenance are considerably different.
Gasoline grass trimmers with two-stroke engine
Motor trimmers, equipped with a two-stroke engine, has no separate oil supply system for the lubrication of moving parts. So they do not need to be filled with straight gasoline but with a mix of gasoline and motor oil. Remember that you have to use oil designed specifically for 2-stroke engines. Use of automotive engine oil can be very damaging to the tool.
trimmers for grass with a two-stroke engine should be filled with gasoline AI-92. Of course, it can also run on gasoline with a higher octane number. But if you fill the tank with gasoline AI-95, the engine will overheat and run unevenly.
Oil and gasoline have to be mixed in the right proportions. If too little lubricant is used, piston surfaces and cylinder walls will get scuffed, then the piston ring will be destroyed and the engine will seize up. Too much oil is not so critical, but will also have unpleasant consequences. The piston will be fouled and the piston ring will get stuck, which will lead to a drop in power.
Usually the proportions of gasoline and oil are specified in the instruction manual for the tool. Many manufacturers prescribe a 50:1 ratio, i.e. 50 parts of fuel and one part of oil. So you should get 20 ml of oil for every liter of fuel. If, however, the engine is worn out, or the tool operates with a high load, the amount of lubricant can be brought to 25:1, pouring 40 ml per liter of gasoline.
Gasoline grass trimmers with a four-stroke engine
Grass trimmers powered by a four-stroke engine have a more complex design. Gasoline and oil are poured into different containers, from where they are then fed into the engine. You cannot use lubricant designed for two-stroke engines in these models.Gasoline for grass trimmer with such a motor must be AI-92 or AI-95. It is not advisable to use fuel with a lower octane number. this will lead to unstable engine operation.
Many trimmer manufacturers strongly advise to use fuel and lubricants produced under their own logo. They often cost more than counterparts sold under other names. Is it worth overpaying for branded oil??Companies that make gasoline tools, do not produce fuels and lubricants. They buy these products from oil companies, and then packed lubricants in containers with their logo. That’s why you can buy a suitable oil from any manufacturer. The main thing is that it meets the parameters of the engine.
This machine belongs to the semi-professional devices: it is powerful (1.9 l / s), equipped with a reverse start system that does not cause a kickback. As a tool in Echo SRM-350ES is used a line for trimmer to remove the grass or a knife, which is convenient for clearing high and dense grass: weeds, dead wood, weeds.
The grass trimmer is economical: with a gas tank capacity of 0.84 l, it can operate continuously for several hours.
The unit is quite heavy. 6.7 kg, but the set includes a three-point belt, with which the operation will become easier due to the load distribution and its reduction on the lumbar and shoulder sections.
Echo SRM-350ES is quite maneuverable, so it will be easy to work with him on areas that do not have a flat surface. A solid piece of equipment that makes it a reliable companion in the garden.
Gardeners know how quickly grass grows in summer: as soon as you get rid of unnecessary vegetation, it takes over again and the area becomes like an impenetrable jungle again. In such a case, an indispensable helper will be a gasoline trimmer for grass Kalibr BK. 1800.
The grass trimmer handles thin grass, dry growth, and even brushwood with ease. It is economical: one fill of fuel is enough to power it for at least one hour. And in order to evenly distribute the load that occurs when working with the device, it comes with a special belt.
Although it is a budget mower, its features make it a competitor for more expensive trimmers. The device is reliable and will serve for a long time.
If all is well with electrical equipment, then check the carburetor.
On grass trimmers put vacuum carburetors. When disassembling, cleaning or washing it, you must be extremely careful. in no case disassemble the lower part of the carburetor, where the primer is. The air filter (you can see it if you remove the cover from the carburetor) has to be washed with detergents. The best tool is a dishwasher. After drying we put it back. We flush the carburetor with clean gasoline and blow out all the holes with a pump. We wash the gas line filter as well, then dry and assemble everything. Usually after all these operations the weed trimmer begins to work.
A slender cord instead of a fishing line. is it worth using on a brushcutter??
This thought has crossed the mind of almost everyone, who has mowed 10 acres overgrown with tall grass. At first glance it seems like a good idea. The cable is stronger than the line, so it won’t wear out as much. However, not everything is so simple.
If you put a cable instead of a fishing line, without the possibility of releasing it, securely fix the two ends of the cable and cut them with welding (a drop of melted metal keeps the cable from unraveling). Grass is gone in a jiffy with this tool. It cuts the growth down to about a finger’s thickness. It is not so afraid of stones as it is of a disk. There’s a problem, though: as you wear, pieces of the rope strands break off, and these twisted wires stay in place of the mowing. You could cut yourself if you step on it.
But pieces of wire left in the field are half the trouble. A line with a sprocket shape strengthens the transmission and engine, but a cord does not. The result is wear and tear on the brushcutter.
Remember also that a piece of wire, spun by the centrifugal force as the trimmer head rotates, flies like a bullet. Imagine what would happen if it got stuck in someone’s leg or in someone’s eye?
Using wire, wire, or multicore cables instead of lines can lead to quick grass trimmer breakage. It’s also a direct safety violation!
Experienced users recommend buying trimmer lines with a “star” profile. A 3 mm trimmer line with a diameter of 3 mm easily chops finger-thick stalks and consumes less power than a round line.