STIHL grass trimmer how much oil to put in the gasoline
Oil for lawn trimmer brands Husqvarna, STIHL. the proportion of mixing with gasoline, how much to add and what oil to use, video
Lawn mowers. a popular machine for dealing with weeds. How to fuel a two-stroke grass trimmer? What is the normal gasoline to oil ratio?? How much oil to add to 1 liter of petrol?? How to choose the ratio for your model?
Often there are problems with the proportions of oil and fuel for the reliable operation of a brushcutter. The reason for this is completely different information in the sources. You may encounter a difference in the data on the ratio by a dozen units, and sometimes by half. So you can’t help wondering how much oil to use per 1 liter of gasoline: 20 ml or 40 ml. But for this, there is a technical data sheet for the product that you buy in the store. There should be a description of the machine, its operating instructions and instructions on how to prepare the fuel mixture.
First of all, you must take into account the information recommended by the manufacturer, because in the case of a faulty brushcutter you can bring your claims to him, not a third-party source. If there is no instruction in the datasheet, and especially if there is no datasheet, we recommend looking for another grass trimmer model from a more reliable vendor.
For all other cases, when you have a lawnmower model in your hands and there is no way to know its technical features, there are standard proportions of the most likely components of the fuel mixture for a two-stroke engine. Basically for these units gasoline of AI-92 brand and special synthetic oil are used, which contains a solvent for better mixing with fuel. Such oil evaporates slowly and has the ability to burn completely in the cylinder without leaving a residue.
The standard ratio of synthetic oil to petrol is 1:50. This means that you need 100 ml of oil for 5 litres of petrol, so the oil consumption for 1 litre of petrol is 20 ml. Knowing the amount of oil required to dilute 1 liter of fuel, you can easily calculate any rates when preparing fuel for the grass trimmer. When using mineral oils, a mixing ratio of 1 : 40 is often standard. It is therefore necessary to use 25 ml of such oil for 1 litre of fuel and 125 ml for a 5-litre jerry can.
When operating a lawnmower, a person with little experience in such equipment will not have difficulty in determining and correcting the actual amount of oil needed for a particular model. You should only pay attention to the exhaust gases (their color, odor toxicity), stability of cycles, engine heating and developing power. details about what to expect when mixing petrol and oil in wrong proportions is presented in another article. There are versions of brushcutters that run on gasoline AI-95. This should also be taken into account.
If the manufacturer recommends this octane rating, you should always follow the recommendation so as not to reduce the service life of your model.
Using a trimmer for grass in the garden
In modern conditions the grass trimmer’s purpose is to care for the lawn and the area as a whole. Unlike a traditional lawn trimmer unit, the grass trimmer has some beneficial differences:
High mobility. Enables use in hard-to-reach and confined spaces.
Versatility. Depending on the type of vegetation, the cutting attachments are interchangeable, enabling grass to be cut of any height and hardness.
Simple design. Proper maintenance of the grass trimmer does not require regular adjustments, frequent repairs.
When choosing a grass trimmer, analyze the operating conditions of the machine, which will help to make the right choice on the type and power of the engine.
Fuel mix for two-stroke engines
trimmers for grass, which are equipped with a two-stroke motor, do not have a separate system designed for oil supply in order to lubricate the rubbing parts. For this reason, such devices should not be filled with pure gasoline, but with a mixture of fuel and motor oil. The latter should be specially designed for two-stroke engines. Use of automobile engine fluid will lead to premature engine failure.
Preparing Fuel Mixture for Two-Stroke Engines
Gasoline AI-92 is used for charging the lawnmower with a two-cycle engine. When using AI-95, overheating of the engine and uneven running of the unit may be observed. Mix petrol with oil in the proportion 50:1, where 50 is fuel and 1 is oil. It turns out that you need 20 ml of oil per 1 liter of fuel.
If the engine is worn out or the tool is operated with a high load, the ratio is 25:1. If there is not enough lubricant, there will be burrs on the cylinder walls and piston surface. A piston ring will then be destroyed and the engine will seize up. An overabundance is not that critical, but it can lead to fouling. The piston ring will get corked in this case, which will reduce the power of the device.
The oil and gasoline ratios for the fuel mixture
Gasoline for a four-stroke engine
Devices with a four-stroke engine have a more complicated design. Oil and gasoline are poured into different reservoirs, from where they are pumped into the engine. For a mower with such a motor needs gasoline brands AI-92 and AI-95. It is better not to use fuel with a lower octane rating.к. it will cause unstable engine operation. Do not use lubricant designed for two-stroke models.
The ready-to-use petrol-oil mixture can be stored for up to 3 months (pure petrol is stored for less). Dilute enough fuel for several uses of the grass trimmer. Prepare in general:
- Gasoline and oil that is suitable for 2-stroke engines with air cooling system;
- Metal canister and mixing pail;
- A respirator;
- Pour 1 liter of gasoline into a container of suitable volume and add 1/2 the desired amount of oil.
- Mix cautiously, keeping a good distance from open flame sources.
- Add the remaining half of the oil to the fuel and mix everything again.
General recommendations on filling the grass trimmer with a two- or four-stroke engine:
What gasoline to fill in a chainsaw?
According to experts, you should use unleaded gasoline obtained by adding lead-free additives with an octane rating greater than 90. Foreign models require higher brands of gasoline and branded oils from the tool manufacturers. Ideal fuel is AI-92. How to mix gasoline for STIHL 180 chain saw? In this case the oils are meant to be mixed 1:40. Fuel AI-95 will be fine, but according to professionals it’s better not to use it for chainsaws.
The point is that it is made on the basis of AI-92 with the use of certain additives that change the quality of fuel. These components deposit on the inner parts of the machine and, if they reach critical mass, begin to flake off, impairing the function of the mechanism. The best option is to follow the instructions that come with the chosen model. It is recommended to use fresh gasoline, because the octane properties are lost when stored in containers for a long time.
List of oils by value for money
2-stroke engine lubricant:
- Capacity 100 ml. can buy it for 90 p., You need to add 1:50 oil to your petrol (20 grams of oil per liter of petrol). This oil is designed specifically for STIHL chain saws. Main ingredient: Minerals. Also suitable for other models by other manufacturers.
- STIHL (1L volume), intended for saws of the manufacturer STIHL. Diluted 1 to 50. Mineral-based lubricant. Price in the range of 500pp.
- STIHL dispenser (1 litre). diluted at a ratio of 1 to 50. Price of approx. 600 p.
- STIHL H. P. Ultra (100 ml volume), ratio 1:50. Also for STIHL chain saws. It is a synthetic oil. It has a high degree of lubricating benefit. Also suitable for other chain saw models with 2-stroke engines. The price of this lubricant varies around 120 p.
- STIHL (5 ml volume), 1:50 ratio of product to gasoline. Contains mineral additives. Directly designed for STIHL chain saws with 2-stroke engines. Also suitable for other brands. Price is 1500 p.
- STIHL H. P. Ultra dispenser (1 litre capacity), diluted in the ratio of 1:50, made for STIHL chain saws. Can be used for other brands. Price 1100 p.
Good value for money list of lubricants
Lubricant for 2-stroke engines:
- 100 ml capacity. can be purchased for around 90 p., diluted 1 to 50 (20 grams of oil per liter of petrol). Especially developed for STIHL chain saws. Main ingredient. minerals. Also available for other models from various manufacturers.
- STIHL (1 litre capacity), suitable for STIHL saws. diluted 1:50. Mineral-based lubricant. Price in the range of 500 p.
- STIHL dispenser oil (1 litre volume). Diluted at a ratio of 1 to 50. Price of about 600 rubles.
- STIHL H. P. Ultra (100 ml capacity), 1:50. Also suitable for STIHL chain saws. This is a synthetic oil. It has a high degree of lubricating benefit. Also suitable for other chain saw models with 2-stroke engines. The price of this lubricant varies in the range of 120 p.
- STIHL oil (5litre capacity), petrol to lubricant ratio 1:50. Mineral additives in the component. Manufactured directly for STIHL chain saws with 2-stroke engines. Also used for other. Price is 1500 p.
- STIHL H. P. Ultra with dispenser (1 litre capacity), diluted in the ratio of 1 to 50, made for STIHL chain saws. Can be used for other brands. Price 1100 p.
In every chainsaw, there are three basic elements that make it work. The 2-stroke carburettor engine and two tanks. One is filled with fuel mixture, the other with oil to lubricate the chain. Fuel tank capacity of 0.25 litres for non-stop use for 45-55 minutes. The oil tank is about half the volume. With this volume ratio, both tanks nearly run out at the same time.
The 2-stroke engines don’t use an oil pump system, so the STIHL chain saw has to add oil to the gasoline to lubricate the shaft, piston and other working parts. Attempts to work on one gasoline, or failure to comply with the proportions indicated in the instructions for the composition of the fuel-lubricant mixture of the two components, leads to tool failure.
Choice of lawnmower oil
For trimmer engines, it is necessary to choose oils with the “2T” marking, which are used for engines with a volume of 50 to 200 cm3 and are air-cooled. The first thing to pay attention to when buying oil is not the price, but the protective properties of the material, because a small savings can later become a real headache for the owner and, as a rule, a big expense.
Two-stroke oil for lawnmowers
The main factor determining the quality of grass trimmer oil is the alkalinity number. This component prevents oxidation of rubbing parts and slows down their destruction. The oil gradually loses its alkalinity and becomes oxidized. The optimal level of acidity (Ph) should not be less than 8-9 units.
The brushcutter oil viscosity also has a big influence on the working process of your petrol tool. This indicator determines the ability to operate the grass trimmer at different temperatures. Summer brands of grease, for example, thicken even when the temperature falls slightly. Since you only use your lawnmower in spring and autumn, an oil with a summer grade is a good choice.
Grass trimmer oil flash point higher than 225°C, otherwise the oil will burn out fast and the piston group will be subjected to heavy wear and tear.
What to pay attention to when choosing oil?
Modern two-stroke brushcutter engines are filled with a mixture of AI-92 petrol and oil marked “2T”. Using fuel with a higher octane rating will cause the flash point to increase and consequently burn out the lubricant.
STIHL different types of oil
Undoubtedly, the best oil for the grass trimmer is recommended by the manufacturer, but the owner is not always able to buy exactly “branded” lubricant. Experts recommend Shell Helix Ultra, based on Pureplus technology, which improves the basic properties of the lubricant.
Gasoline trimmers from German manufacturer STIHL require STIHL HP Ultra, STIHL HP, STIHL HP S oils. A budget substitute can be products of Vityaz company, which by its properties is the most similar to the recommended material.
Oil for brushcutters. How to choose, in what proportions to dilute
Many of you have a household gasoline-powered tool, for example, in a private home can not do without a chain saw. You know how to prepare wood for the winter, it comes in handy for construction and repair work, and it is a very useful tool. If the country house also has a decent-sized plot, then the grass trimmer or lawnmower, which also work on gasoline, is simply needed to combat the grass.
Of course, you can buy them and electric, but not everyone likes to pull a 30-meter extension cord to mow the area overgrown with grass up to the knee. That’s why most people prefer to work with petrol-powered tools. As you know, you need to add special oil for two-stroke engines. That’s what we’re going to talk about, because it’s a very important aspect, if you don’t add oil and add it in wrong proportions, your engine will “croak” very quickly and your way will be to a service center. To avoid all those troubles, you have to add only good quality oil in right proportions.
The most popular for chainsaws, brushcutters and trimmers are the well-known STIHL products. It comes in two packages: 1 liter and 100 ml. For those who work a lot, a liter bottle is good, but a small bottle is enough for “one cut”. 1 liter container costs 250, and for 10 ml it’s 60. If you take the large bottle, the savings are obvious.
Add the oil to the gasoline in the ratio of 1:50, which means you add 100 ml for every 5 liters of gasoline. As you can see, a small bottle is great for getting 5 liters of gasoline mixture to fill a chainsaw or trimmer for grass. On the big bottle there are special marks on the side, by which you can determine how much oil you have poured out of the bottle. If you bought a big 1 liter bottle, then buy a 20ml syringe at the drugstore. Very convenient. 1 syringe of oil for 1 liter of gasoline.
STIHL recommends you to use STIHL brand oil for your model: it is ideal because it has been tested on STIHL power tools. Note that Stihl has its own brands, such as VIKING (popular models of gasoline trimmers). Use Stihl oil for these too, and you won’t have any problems.
If you’ve tipped more gasoline mixture than you can use up, it’s best to store the rest in a metal canister or in a glass container. Never store the mixture in a plastic bottle. Of course, if you use up the rest in a couple of days, you can pour the rest of the mixture into a plastic bottle, but if the mixture will be stored for a long time, then either a canister or a glass bottle. The thing is that the gasoline mixture corrodes the plastic bottle, there are microscopic deposits of plastic in the mixture and this is very bad for the engine. Keep that in mind if you want your tool to work long and without problems.
The second most popular brand of oil is the notorious Hooksvarna. Of course, when you think about it that way, more people use STIHL chainsaws, at least all my friends and their friends use them for work.
I can understand them, because I personally do not see much difference between Husqvarna and Stihl, and both models are of very high quality. But I’ve seen the happy owners of chain saws Husqvarna. they say the saws are super. I have not cut any saws myself but I always listen to what people have to say. So if you have a Husqvarna power tool, it would be better to use special brand oil for it. But nothing bad will happen if you dilute gasoline with Stihl. But if the manufacturer recommends to use only its products, then we will do it.
You can find liter bottles on sale. A black stylish bottle, the same markings on the side as Stihl has (to know how much oil has been poured out of the bottle). Seems to me, absolutely identical quality. The price of a bottle is 270, but it’s a little more expensive.
Both are good quality oils, cost about the same, each diluted in proportion of 1 to 50. So feel free to buy any, of course, better to take the oil of the brand that you have a tool. then everything will be perfect, just as the manufacturer advises. Good luck with cutting and mowing, and may your power tool continue to run for a long time without malfunctioning.
Inspection of lawnmower gearbox and its lubrication
Checking the gearbox before starting your petrol grass trimmer should be done on a regular basis. Little or no lubricant increases friction in the gearbox at quite high rpm. As a result of overheating and gears. Gearbox on brushcutter fails. To prevent the occurrence of such a failure in the process of operation and helps regular inspection.
If you notice, before starting the gasoline grass trimmer, lack or insufficient lubrication in the gearbox, put “LITOL” in the housing. To do this, you need to unscrew the screw on the bend of the gear housing and pour “LITOL” in an amount of 1-2 ml.
After every 8 to 10 hours of operation with the petrol trimmer add oil to the boom gearbox.
Preparing the correct fuel mix
Before you start running in a new lawnmower engine, you must also correctly prepare the fuel mixture. As it is known for two-stroke engines it is made of special two-stroke oil and gasoline taken in certain ratios. You can find the proportions in the instruction manual supplied with the machine or on the label of the lubricant. Check the manual for the recommended type of fuel and recommended type of engine oil.
Only prepare small amounts of fuel enough for one cut of grass. Use special plastic canisters for fuel, or a separate container of glass or metal. It is best to apply oil with a hypodermic syringe.
Getting ready to test drive a new lawn mower many people have a problem with the fuel mix. The reason for this is that there is a discrepancy between the tool manufacturer’s manual and the engine oil manufacturer’s manual. The first ones recommend the proportion 1:25. The second recommendation is 1:50. Who to believe? What to do?
According to the experts, if the manufacturers write the proportion 1:25 or 1:30 in the instructions to trimmers, it’s most likely a cheap tool with bad cooling, or the manufacturer doesn’t know what oil the consumer will add. But here we must understand that an excess of lubricant does not affect the performance of the grass trimmer in the best way. Excess oil does not burn out completely when the engine is working. It cokes, it clogs up the cylinder and the piston.
What to do in this situation when running-in a new tool? The ideal solution is to buy the oil that the mower manufacturer recommends. In the case of running-in engines, when it is not possible to buy the recommended oil, it is best to buy a good Husqvarna two-stroke oil for the same name gasoline tools. It is not cheap, but it lasts for a long time. Mix it as described in the instructions on the can.
Remember, it is best to use the proportions given by the oil manufacturer. It is better to find out by experiment if the proportion is suitable, what is written on the trimmer. If you can see that the engine is dripping with oil at the ratio recommended by the manufacturer, you need to increase the oil ratio.
How to mix (dilute) petrol and oil for 2T engines.
To summarize the above. Use an oil designed by or recommended by the machine’s manufacturer for your brand-name machines. For example, use STIHL HP oil for the STIHL FS 55 brushcutter (see Figure 1b). 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 motor oils for your engine. such as 10W30, SAE 30, etc.д.
Figure 1 a-Husqvarna oil (Left), STIHL oil (Right)
Never use 2-stroke oil intended for water-cooled engines, because these oils are designed to operate at lower temperatures.
Follow the proportions of oil and gasoline in the fuel mixer manufacturer’s instructions. The most commonly quoted mix ratio by Chinese manufacturers is 1 part oil to 25 parts gasoline, and by STIHL and Husqvarna it is 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 syringe of medicine for accurate dispensing.The fuel mixture should be prepared in a clean container especially designed for this purpose. (see. figure 2)
I do not recommend to use improvised plastic bottles and canisters, because gasoline can dissolve plastics and all this “slurry” gets into the fuel tank and causes failure of the carburetor.
Plastic canisters designed for gasoline are always marked with a “flame” sign. It is very convenient to use a canister with a no-fill system (see Fig. 3). figure 3). The no-fill system has a valve that prevents fuel from spilling when the tank is full.
Figure 3. No-flame system
What’s the Best Oil to Choose for Boat Engines.
Also note that if these oils cannot be used to make gasoline mixture for boat motors. In 2T model motors it is necessary to fill in a mix prepared from gasoline with octane number not less than 89 and ultrapure oil with detergent additives of NMMATC-W3 marking in proportion 1:50 for working mode, and. 1:25 for the running-in period (first 5 to 10 hours). the choice of quality oil.is the base of engine performance, that’s why each manufacturer recommends to fill up the equipment with certain oil brands, thus guaranteeing the longest service life of the product. For boat engines (both 2t and 4t) tohatus service center recommends to use german motul or american quicksilver oils. For mercury engines you have to use only quicksilver motor oil. The preferred brands for Honda boat engines are motul and statoil.
It is not recommended to use the fuel mixture if more than two months have passed since its preparation.