GRASS CUTTER UNLEADED or PREMIUM?
Fueling the grass trimmer with fuel mixture
The fuel mix is very toxic and must be carefully filled into the gas tank. It is important to observe safety rules when working with such materials. It is best to refuel outdoors and away from sources of ignition. It is best to work in dry, windless weather. Use a funnel or spout to keep the fuel from spilling. The spilled mixture may remain unnoticed and ignite when the motor heats up.
Craftsman trimmer is ran on a light oil/fuel mixture
Before pouring fuel into the brushcutter, clean the gas tank, remove dirt, only then unscrew the cap. Immediately after pouring the fuel mixture it is necessary to close the tank tightly to prevent dust, insects, foreign impurities from getting inside, because it can be the cause of clogging the fuel filter. Do not fill above the Max mark. Gasoline cylinders are made from high quality, translucent plastic, so it’s easy to check the fluid level in the tank. If necessary, just top up with fuel.
How lubrication systems work
Both types of engine contain a fair amount of moving parts. Lubrication is required to increase their service life. The fueling on two-stroke and four-stroke engines is done differently and this has a lot to do with the refueling and maintenance routine.
The lubricant in a two-stroke engine is mixed with the fuel/air mixture. Oil dissolved in fuel sprays with the gasoline in the carburetor, the resulting mist enters the crank chamber. The channels are configured in such a way that the path of the sprayed lubricant is as long as possible and goes through the main moving parts. due to the special properties of the oil, most of it settles on the metal parts, and the cleaned fuel is transferred to the working area of the cylinder. These are the properties that make two-stroke oil so different from other types.
The fourstroke engine always has oil in its insulated oil sump. Its level is controlled so that the crankshaft journals periodically dip into the oil bath. When rotating, the centrifugal force of the rocker arm splashes oil into the interior of the machine so that the oil gets into the piston and piston pin and onto the walls, where it cools effectively. To keep oil out of the combustion chamber, an extra crimp ring is installed on the piston to remove any oil residue from the cylinder walls as the connecting rod moves down.
Like most chain saws, it comes disassembled: the body, the bar and the cutting attachments separately. In addition to the main parts, the kit includes: a tool kit, a container for gasoline mixture, a cover for the bar, a toothed stop, a file for sharpening the chain and reliable safety glasses.
Everything is clear with the kit. let’s move on to the assembly:
Slide the safety guard toward the front handle to make sure the chain brake is off.
Gas-to-Oil Ratio for a Homelite Weed Trimmer
Loosen the nuts and remove the chain guard.
Fitting the cutting link (it is included in the package with FUBAG FPS 56 chain saw).
Turn the chain on the sprocket wheel and at the same time let the guide bar get into position on the guide bar.
Check that the direction of rotation of the chain is correct.
Put the chain guard on the main body of the saw and tighten the nuts by hand.
Tighten the chain by turning the tensioning screw until the connecting link comes into contact with the underside of the chain guide.
Lift the end of the bar and finally tighten the nuts.
Check manually that the rotation is even and that the tension is correct.
If your chain saw has a gasoline-powered tensioning system, such as with the FPS 37 model, it takes no more than a minute to assemble. To do this, you’ll need:
Position the bar and chain on the chainsaw pins in the right way (cutting teeth must point in the direction of travel). 2. Install cap. To make sure the cover is properly installed, adjust the position. pins on it so that they fit into the holes in the rail.
Extend the screw stop and tighten a little so that the bar and chain do not hang loose, but, there is some freedom to adjust the chain tension. 4. Adjust chain tension by turning the wheel.
Extend the stop and tighten the cover, so that the equipment is properly secured.
Do not overtighten the chain as it may soon be stretched out again. The chain should have a small margin of slack. This is not difficult to check by hand. Ideal if it can be tilted a millimeter away from the guide bar.
How to mix (dilute) gasoline and oil for 2t engines.
To summarize the above. Use for your brand equipment the oil developed or recommended by the manufacturer of that equipment. For the STIHL FS 55 brushcutter, for example, STIHL HP oil (see. Figure 1a) or STIHL HP SUPER, for the Husqvarna 128R brushcutter use Husqvarna HP oil (Figure 1b) or Husqvarna LS oil. For 2.Do not use 4-stroke engine oils such as 10W30, SAE 30, etc.д.
Figure 1 a- Husqvarna oil (left), b- STIHL oil (right)
Never use 2-stroke oil intended for water-cooled engines, because these oils are designed to operate at lower temperatures.
The proportions of oil and gasoline for the fuel mixture must be in accordance with the manufacturer’s instructions. Chinese manufacturers most often say 1 part oil for 25 parts gasoline, STIHL and Husqvarna say 1:50.When preparing a small volume of mixture (up to 1 liter), it is very important to carefully measure the amount of oil in the mixture. Even small miscalculations in the amount of oil can lead to serious inconsistencies in the mixture. In these cases, you can use a medical syringe for exact dosing.The fuel mixture must be prepared in a clean container designed for the purpose. (see gasoline and lighter fluid in the jug). Fig 2)
I do not recommend the use of improvised plastic bottles and canisters, as gasoline can dissolve plastics and all this “slurry” gets into the fuel tank and fails the carburetor.
Plastic canisters designed for gasoline are always marked with the “flame” sign. It is very convenient to use a canister fitted with a no-fill system (see “Fill Oil System” on page 31). Figure 3). The spill-free fueling system has a valve that prevents fuel from spilling when the tank is full.
Fig. 3 The no-fill system
How to fill the gasoline trimmer?
If you bought a trimmer for the grass, and the instructions in the kit only in English, do not despair. In this article you will find the answer to the burning question. how to fill your brushcutter properly with gasoline. Let’s first get acquainted with the construction of the engine of the gasoline trimmer. Engines for gardening equipment are usually two-stroke. This means that the equipment responds more quickly when you pull the throttle. The design of the two-stroke engine is simpler, and to fill the gasoline must be mixed with oil. Gasoline and oil are filled separately in a four-stroke engine. Grass trimmers with a four-stroke engine are rare, most often it is a professional brushcutter.
How to fill a gasoline trimmer with a two-stroke engine?
1) To fill the trimmer for grass use clean gasoline not lower than AI-92, and high-quality oil. Oil must be specified for air-cooled two-stroke engines. It should not be confused with oil for water-cooled engines, using the latter type of oil can cause the grass trimmer to work with insufficient cooling, and to break down. Grass trimmer oil must be JASO or API rated.
2) The grass trimmer tank must be filled with a fresh mix of gasoline and oil. The fuel must not be stored for more than 3 months. Oil and gasoline mix ratio: 1 part oil, 40 parts gasoline. Do not mix the fluids straight in the fuel tank and “by eye”. Do it in a special container with measuring bars. The engine may become unstable and break down if this rule is not followed.
3) Mixing process: pour one part of oil into a measuring jug, add 20 parts of gasoline, and mix gently and thoroughly. Then add 20 parts more of gasoline to the mixture and mix again.
If you put too little oil in the engine, it will lead to insufficient lubrication, scuffing will occur on pistons and cylinder bore, the piston group will be damaged. If, on the contrary, a lot of oil is added, then the engine may cork (there will be deposits on the internal engine parts).
4) Filling the tank. This is done by placing the canister with the cap up and filling the canister to the required capacity. Screw the lid on tightly. Engine ready to run. When turning on, you need to make sure that the fuel mixture fills the pumping cap.
How to fill a four-stroke petrol trimmer?
1) still use the same gasoline, no lower than AI-92, clean and fresh (stored for no more than 60 days outside the gas station). Use special oil for four-stroke engines that meets the SAE30 and API classifications. Do not mix oil and gasoline under any circumstances!
2) Pouring oil into the engine housing. normally max. 90 ml for the first filling. When you run out of gasoline there may be oil left over. If less than half remains, you should add oil to the crankcase.
3) pour petrol into the fuel tank, holding it so that the cap is at the top. You must not overfill the tank, otherwise it will overflow into the intake pipe, and it may cause engine failure or ignition of gasoline. Screw the fuel filler cap on. Engine is ready to run!
And lastly, a few tips. First, you can buy engine oil in large hypermarkets or gas stations. Secondly, when filling the engines of brushcutters with gasoline must comply with safety measures: do not spill gasoline, and if it spilled, immediately wipe it off, turn on the gasoline trimmer, only away from the container with gasoline or fuel mixture at least 10 meters. Third, if you intend not to use the trimmer for a long time, the remaining gasoline should be drained.
Consequences of disproportion violation
The service life of your MotoGP engine depends on how accurately you follow the manufacturer’s recommended oil to gasoline mix ratio. The fact is that the fuel mixture enters the cylinders in the form of gasoline-oil mist. The function of the oil composition is to lubricate the moving and friction parts and surfaces of the various parts that are in the cylinder. If it suddenly turns out that the oil is not enough, and somewhere it will not be enough at all, touching dry parts will begin to damage each other. As a result, scuffs, scratches and chips will form, which will definitely lead to complete or partial engine failure (for example, it may jam).
in the opposite case, when too much oil gets into the engine, it does not have time to be completely combusted, depositing on the cylinder walls and turning over time into solid particles. coke, slag and the like. As you might guess, this also leads to engine failure. The most important thing that must not be allowed. even a single violation of the proportion in the direction of the lack of oil. It is better to overfill a little oil 10 times than to underfill just once. It often happens that this time is quite enough to break the engine.
Choosing the Oil and Gasoline for your Grass Trimmer
A two-stroke engine works differently than a four-stroke. The lubrication system for these machines also differs. Oil for two-stroke devices does not come from the crankcase (they have no crankcase), but from a fuel tank, where it is poured together with gasoline.
Oil for two-stroke engines has its own peculiarities. it dissolves well and burns off completely.
It is better to use specialized lubricants marked TA, TV or TC for trimmers and similar gardening equipment. The designation “self mix” on the container with the oil means self-mixing with gasoline (not requiring shaking), “pre-mix”. the need of forced dissolving.
Benchwheel oils can be any. mineral, synthetic or semi-synthetic. The main thing is that they are intended for two-stroke engines and comply with the recommendations of the tool manufacturer.
It is necessary to fill unleaded gasoline with octane number 92 or 95. Fuel must be fresh. after purchase it can be stored for no more than 60 days. There is also a special purified gasoline for two-stroke power units on sale.
How to choose the right gasoline
Before you buy fuel for your brushcutter, you need to read the manufacturer’s instructions. It specifies the types and grades of fuel that can be used for a particular model of grass trimmer. In general when choosing gasoline you should be guided by the brand A-92. You can also use A-95 to fill your brushcutter, but some experts don’t recommend using fuel with this octane rating. This is because many filling stations in Russia have different additives and solvents (such as alcohol) in their gasoline. To get the long life of your brushcutter you should use only high-quality fuel from a trusted supplier.
For a two-stroke motor, the basic maintenance operation is to service the air filter. Periodicity is 10 working hours. During cleaning the material is washed in warm soapy water. Slightly soak in oil before fitting.
Check that the fuel filter (if present) is clean at the same time. But it’s better to clean the fuel mixture when you fill up your weed trimmer. Check the spark plug regularly for carbon deposits. The gap between the electrodes should be 0.5 mm.
The grass trimmer will serve for many years with regular care and correct operation.
The authors who answered correctly noted that there is a big difference in gasoline brand used for two and four strokes. I don’t have any consideration for electric trimmers. They, by definition, only use lubricants for the moving parts of the drive.
Without getting “from behind the furnace,” I can say from my own experience that gasoline for two-stroke engines should be the actan number less than for four-stroke engines. I had the experience of using Makita four-stroke grass trimmer on 92 gasoline. The owner of the trimmer for grass snovA knew it on 92m, although the manufacturer has recommended gasoline 95 and above. But all other exploitation fluids were used in strict accordance to the instructions (engine crankcase oil (for crankshaft)) I also tried to mow on it for a while, and realized that. Bottom line. The traction is abnormal, much lower than the manufacturer’s claims, it results in higher revolutions and heating too, gasoline does not burn completely, the muffler deposits are constantly growing. Took it home for a spin, filled it with 95 gasoline, and the machine went. no heat, inebriation, exhaust like on gas. does not even smell or smell, you can put your hand on the cylinder and not get burned. Conclusion. For four-stroke trimmers at least 95 gasoline is better.
For two-stroke engines. It is just the other way round. In what proportions do not dilute 95 gasoline with oil, additives are present in it (and in Russia by definition “pure” 95th gasoline is not available at all is the same 92 additive package), it will not be neutralized by oil and therefore the detonation component cannot be excluded. What is more, a two-stroke engine that works for every cycle of piston stroke to ignite the working mixture gets much hotter with high-octane gasoline because it has a higher combustion temperature. Which leads to increase of natural expansion of metals, well logically to reduction of clearance in mating parts (piston group, bearing shells and balls, etc) and to improvement of gasoline resistance.п.) Every second stroke of the 4-stroke engine works in the working mode (ignition of the working mixture). by the cooling system operating principle, it is also possible to say that 92-th petrol is more recommended for 2-stroke engines with the air cooling system.
The oil proportions for any of the motor types first need to look in the product datasheet. Well, and of course clearly understand that the four-stroke oil is filled into the crankcase, and a two-stroke is prepared by the working mixture of gasoline and some oil. The proportions for oil and gasoline for each model of trimmer should be looked at (first of all!) in the product datasheet. I can only give you the guaranteed proportions of oil and gasoline for STIHL and Huter two-stroke trimmer motors. Dilute 25 mg of oil to every liter of 92 rd gasoline during the break-in period and during operation, if you use our (Russian) gasoline. Proportion 40/1 I have been running my STIHL 180 and my Huter weed trimmer for over three years on these proportions. the flight is fine. The lubricant ratios 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.
What is the gasoline for your grass trimmer and how much oil to use?? In the category Animals and plants on the portal Otvet.expert
The standard determines that to prepare a gasoline-oil mixture, you will need to take technical fluids in the proportion of 1 to 50. This means that you must add 200 milliliters of oil to 10 liters of gasoline. If you need to dilute the amount per 1 liter of gasoline, then use the formula according to the rule of proportion.
Note that when using mineral oil, the proportion is less and is 1 to 40 per liter of gasoline as standard.
Oil and gasoline ratio for two-stroke engines: instructions for “dummies
The right proportion of oil and gasoline for two-stroke engines will allow for the best operation of the equipment. Dilute the two fluids in different ratios. Homius editors offer simple instructions on how to dilute technical fluids for those who have only recently purchased an appliance with a two-stroke engine.