FAQ when buying a chainsaw
Husqvarna Brand Homeland. Sweden. The Husqvarna factories where the gardening equipment is assembled are scattered around the world: Sweden, USA, UK, France, Italy, Czech Republic, Poland, Brazil, China, Japan. Husqvarna chainsaws are specifically built in three countries: Sweden, the U.S. and China. The company values its reputation very much, and when supplying models to the international market, checks its equipment for reliability and safety. And the high world quality standards and intense competition will not allow “save” on the quality of products. Whether your chainsaw is assembled in Sweden, the USA or China, you can rest assured that with proper handling it will last for years to come.
What chainsaw for domestic use?
Husqvarna 236 and 240. two models for occasional use (working volume of the cylinder is 38.2 cc.For example: cutting firewood, pruning trees in the garden, minor construction work on the site. Lightweight and powerful models. The 236 is one of the most popular models among private users. 236 and 240 differ only in 1.4 kW and 1.5 kW power and 3/8″ chain pitch and.325″ respectively. Husqvarna 135 and 140 are domestic saws, suitable for year-round use (40.9 cc cylinder displacement.). Husqvarna 135. Husqvarna’s most popular model. 135 and 140 differ only in power 1.4 and 1.5 kW and in the equivalent handle vibration level of 2.5/3.2 and 3.9/3.8 m/sec.
What kind of gasoline do I use??
According to the Husqvarna gasoline saws instruction manual it is allowed to fill the tank with gasoline with octane number starting from 90. However, we recommend to use gasoline AI-92. Why 92? AI-95 and AI-98 gasoline uses esters as anti-detonation additives to increase the octane number. AND AI-95. is generally AI-92 with 5 percent methyltrebutyl ether (anti-detonation additive). Increased (low-quality) gasoline additives to increase the octane rating leads to rust on the spark plug electrodes, carburetor jets and catalyst “poisoning”, which in turn leads to increased fuel consumption. While AI-92 is a blend consisting of 92% isooctane and 8% n-heptane. Isooctane octane rating. 100 (it has no detonation), but n-heptane, on the other hand, has a detonationproducing octane rating. 0. A-92 is ideal for your chain saw.
What kind of oil to use?
chainsaws are equipped with two-stroke combustion engines where an oil pump cannot be structurally installed. That is why chainsaws are filled with a mix of petrol and oil. Oil must be for two-stroke engines. Husqvarna oil is specially formulated for the gasoline used at our gas stations. Quality standards of oils for two-stroke engines were recently lowered in CIS countries but Husqvarna has not changed the formulation of its oil that still meets higher quality standards. That is why it is mixed in a smaller proportion than other producers’ oil. Husqvarna 2-stroke oil is mixed at a mixing ratio of 1:50 (2%) 20 gr of oil to 1 liter of gasoline. Other manufacturers’ two-stroke oil is mixed in the ratio 1:33 (3%) 30gr of oil to 1 liter of gasoline.
How much fuel mixture can be stored? Do I have to drain the tank after using the saw??
Diluted fuel mixture should not be stored for more than one month! The instruction manual may say 3 months, but this corresponds to European-quality gasoline. Practice shows that 1 month is the best period for storage of domestic gasoline. If you are not planning to use your chainsaw in the near future, the fuel mixture should be drained and the remaining fuel should be burned by running the tool at idle speed. Why not: Gasoline evaporates from the carburetor during storage, leaving only the oil in the carburetor. The diaphragm responsible for priming the fuel jams and the saw is then difficult to start. Store the fuel mixture and gasoline should be in special containers designed for this. Gasoline is a very corrosive medium, and if you store it in a plastic canister not designed for fuel, gasoline begins to corrode the plastic. A carburetor that is clogged with plastic particles cannot be repaired. If this article did not answer all your questions, here are some helpful resources.
Our consultants will give you qualified assistance in choosing the model: 375 17 236 72 22 375 29 638 88 72 (velcom) 375 29 628 88 71 (velcom) 375 29 755 67 00 (mts)
How to Mix Gasoline in a Grass Trimmer
Depending on the type of trimmer, they can be filled with a fuel mixture or separately with gasoline and oil. Now there is a huge variety of types of motor oil, which are suitable for a variety of equipment, including garden. In order to select the right fuel for your trimmer you need to know the trimmer’s technical specifications and know what types of gasoline and liquid lubricants are available. All details on how to dilute petrol with grass trimmer oil are given below.
How to dilute gasoline with oil for grass trimmer Huter
Grass trimmer technical specifications contain references to recommended oils and lubricants. in this case, the octane number of gasoline brand is specified, but when it comes to oils, they are extensively explained that it is necessary to use the product of a certain manufacturer. For the sake of reassurance, it is stated that only if these tips are followed will the company extend the warranty. What is it: pre-sale preparation for other oils from other manufacturers? The answer is in the true article.
The two-stroke engine has an ordinary and, at the same time, very effective design:
- the piston makes a working stroke who the 2nd stroke;
- the cylinder is lubricated with oil dissolved in petrol;
- removal of combustion products is done by compression, without a special mechanism.
All this led to the creation of a family of small engines that have been successfully adapted in the domestic and professional equipment:
Because of the design features it was possible to achieve the required fuel consumption only with small engines with the output within the range of 15. 20 liters.forces. This ratio looks especially good in the range of 1 to 5 liters.с. Here, according to all parameters, the low weight and the size of the motor corresponds to the consumption of gasoline.
As the size increases, so does the inlet and outlet area. The process of removing gases and fuel supply is sharply aggravated. That’s why it was necessary to introduce a more efficient combustion system, that would foresee a forced maintenance of the engine. These four-stroke models have therefore taken over the palm of the pack with the highest horsepower. By combining them into a multi-cylinder designs it was possible to create special systems related to the formation of the composition of fuel consistency, lubrication and other things that favorably affected gasoline consumption.
Preparation of fuel mixture for two-stroke engines
The rubbing parts of the piston and cylinder of a two-stroke engine are lubricated with oil in a certain proportion of the fuel. Gasoline burns and oil settles on the cylinder, reducing friction of rubbing parts. Lack of lubrication leads to cylinder damage, right up to jamming. If there is an oversupply, under the influence of high temperatures there is a deposition of thermally altered product in the annular grooves. Compression goes down and so does the power.
Motor oils are used as additives in gasoline for grass trimmers. Mixing is done in a certain proportion. Manufacturers have different volume ratios: from 1:50 to 1:20. There is a reference for this in the technical specifications. You should be careful with a small proportion of oils. Small discrepancies lead to oil starvation of the engine, reducing its resource.
There are products, when the specified proportion is 1 to 20-40. Better to give up the use of such grease. Wide consistency range indicates the low quality of the product. Piston ring sagging is practically guaranteed with the same grades.
Motor oils like M-8 are added in the ratio of 1-20. It is not necessary to use them in negligible engines. The cycle between grease feeds is so small that it will cause an overabundance of grease in the cylinder. trimmers for grass have a small turnover, so allow the use of low-grade lubricants. Due to the initially low service life, one need not worry about the rings getting caked. Before that, there will be complete wear and tear on the equipment.
The principle is not to use the recommended oil or otherwise from other manufacturers. The main thing is to dilute gasoline with oil for the grass trimmer, observing the proportions according to the product line. Denial of warranty by the service departments only on the basis of using a different brand of grease, but with permissible parameters, is illegal.
How to dilute gasoline for a chainsaw
For normal operation, any internal combustion engine needs at least two things:
- Fuel. or rather, the fuel-air mixture prepared by the carburetor enters the combustion chamber, ignites, expands, and “pushes” the piston down, thereby performing useful work.
- Lubricant. is necessary to reduce the friction force between the contacting parts of the engine.
Oil is primarily used to avoid so-called “dry” metal to metal friction. It causes critical wear on all parts in contact. scoring, scratching, compression loss, lower service life. Also oil is needed to seal the gaps.
Why is it necessary to mix oil with gasoline for a chainsaw??
This requirement is directly related to the peculiarities of the device and the principle of operation of two-stroke engines, which are equipped with this tool.
Lubrication of the crank and piston train and cylinder group parts is provided exclusively by the oil in the fuel. Due to the special engine construction, the fuel-air mixture enters not only into the combustion chamber but also into the crankcase where the crankshaft and piston rod are located. This is how all the parts that rub against each other can be lubricated.
Practical hints: how to dilute petrol with grass trimmer oil
A lawn mower is as essential for the lawn and garden as a pony tractor or chainsaw. An unpretentious tool that requires only a high-quality fuel mixture and its own cleanliness. While there is usually no confusion about keeping the lawnmower clean, some users occasionally have questions about the ingredients of the fuel.
How to Mix Two Cycle Engine Oil for Weed Eaters, Ryobi Fuel Mixture. 50:1 Fuel Mix and 40:1 fuel mix
How to dilute petrol with grass trimmer oil to keep it in good working order for as long as possible? What can be the consequences of too much or not enough oil in petrol?? The answers to these simple questions lie on the surface: you need to understand the role played by the lubricant in the work of the two-stroke engine.
Fuel for the two-stroke engine: Theoretical considerations
Operation of two-stroke power plant differs from operation of four-stroke engines by the fact that lubrication of rubbing surfaces in the cylinder-piston group, crankshaft, bearing supports is performed not from the crankcase, but due to the oil previously dissolved in gasoline. For two-stroke trimmer engines, the general rules for the preparation of the combustible mixture remain: gasoline must be diluted with a certain amount of oil intended for this purpose.
Lawnmower oil is not fundamentally different from oils intended for use in other garden equipment with a gasoline two-stroke engine.
According to the API (American Petroleum Institute) classification, several varieties of such oils are accepted:
- class TA is used in air-cooled two-stroke internal combustion engines of mopeds, lawnmowers and other, appropriate units, with a displacement of up to 50 cm3; up to 200 cm3;
- class TB. for mopeds, gasoline-powered saws, scooters and small motorcycles with a displacement from 50 to 200 cm3;
- TC class is used in motorcycles, snowmobiles and other land vehicles;
- Class TD determines whether it belongs to the special certification for boat engines, hydraulic scooters, two-stroke combustion engines of yachts and boats.
It must be remembered that classes TA and TB are not identical in composition and properties, so they are not interchangeable.
Besides API there is a JASO system, according to which the oil for 2-stroke engines is classified in Japan. In this system, the following division by quality level is accepted:
- FA class is designed for use in countries with minimal legislative requirements to smoke emission by engines;
- class FB. for two-stroke engines of units operated in countries with high statutory requirements to the level of smoke formation;
- FC class is represented by smokeless motor oils intended for two-stroke engines;
- Class FD. smokeless oils for two-stroke internal combustion engines with improved characteristics, mainly intended for outboard boat engines and stationary internal combustion engines of boats and yachts.
When selecting lawnmower oil, you should keep in mind that lubricants from Russian manufacturers intended for use in two-stroke engines are often marked with the index 2T. The labels “self mix” and “pre mix” are also found. The first means that the oil, when added to the fuel, mixes itself, without additional stirring. The latter should be diluted by forced mixing. by shaking or other method.
Practical recommendations for preparing the mixture
As oil for a lawnmower should not be considered quite primitive options, which include automobile brands AC-10, ACZp-10 or exotic Chinese and garage origin “masterpieces. The bulk of greases for two-stroke engines are painted by manufacturers in colors that contrast to gasoline: red, green or blue. There are several recommendations, proven by years of practical operation of trimmers.
How much grease should be diluted for 1 liter of fuel, if the instruction manual specifies a ratio of 1:40, 1:25 on the fuel tank and 1:50 on the oil canister? The answer is unambiguous. follow the recommendations on the lubricant package. Two-stroke motors do not like oil starvation, but also to oversaturate gasoline with oil should not. it provokes formation of heavy soot deposits at the cylinder ventilation windows, which leads to burrs on pistons.
Diluted with too much lubricant, gasoline is less likely to ignite, which devalues engine efficiency and reduces its service life.
The proportion how to dilute petrol with oils for trimmers is not difficult to calculate. It is enough to divide the amount of gasoline by the recommended ratio. One liter of gasoline is 1000 ml. To figure out how much oil you need to add to get a 1:50 mix, divide 1000 by 50. It turns out that 1 liter of fuel requires 20 ml of oil. It is convenient to measure the needed amount of grease with a 20 ml disposable syringe.
Do not prepare a large quantity of fuel mixture in advance. Gasoline diluted with oil should be stored in a tightly closed container in a dark and cool place. It is more reliable to use steel or aluminum canisters for storing the prepared mixture, rather than plastic containers. This is especially true for beverage containers. Polyethylene terephthalate, which is used in their production is not resistant to most petroleum products and additives.
It should be remembered that how to dilute gasoline with oils for trimmers, largely depends on the resource of the unit, its performance, fuel consumption and comfort when working on the lawn.
How to Mix Oil and Gas: The 2-Cycle Engine Fuel Recipe
What oil to fill in the grass trimmer gasoline. purpose, requirements, varieties, recommendations for selection, rules of application
Using a brushcutter is much more profitable, efficient and productive than the traditionally used manual method. mowing with a grass mower. The engine oil pressure monitoring system is an integral part of the engine oil system, but it requires regular servicing and in particular, timely refilling of lubricants. Let’s find out what oil to fill in the trimmer for gasoline grass, what it is, what it is designed for, what are the requirements for it, what types it is, and what are the general recommendations for its use and rules of choice.
Types of material
oil. the name is rather arbitrary. It is an oil base with a variety of additives. Without them, its lubricating properties are not that great.
According to the origin of the base is divided into two types:
- mineral. obtained by petroleum refining. Their properties depend noticeably on the composition of initial raw materials and are not stable, that is why a lot of different additives are added to the blend. Despite their action, it is recommended to replace the mineral material as often as possible;
- synthetic. obtained by directional synthesis. The properties of the mixture are set in advance, are characterized by stability. Synthetic compounds last longer and need to be replaced less often.
Additives added to the base, impart various additional properties to the mixture:
- antioxidant. which extends the “life” of the mixture itself;
- Corrosion inhibitors. protect the engine from rusting;
- anti-wear. reduces wear of parts;
- ternium modifiers, etc.
In order to obtain the same properties, different additives are added to synthetic and mineral bases and in different percentages. That is why it is strictly forbidden to mix the blends.
Low-quality fuel can cause your tools to break down. STIHL chain saws are usually filled with unleaded gasoline with more than 90 lead-free additives. AI fuel is fully suitable for this purpose. 92. AI is also used. 95, which is used less frequently. It is made on the basis of AI. 92, but contains various additives that deposit on internal engine components and can impair the operation of the mechanism. It is permissible to mix both fuels to achieve the optimum result.
Remember that it is recommended to use fresh gasoline.к. prolonged storage in closed containers loses useful octane properties.
Calculating the fuel mix ratio
Correct filling also means the strict observance of proportions. For a two-stroke engine you use 1 part oil to 50 parts gasoline. To maintain this ratio you need 5 liters of gasoline and 0.10 liters of oil. You should also remember that it is impossible to install an oil pump in such chainsaws, and therefore the use of pure gasoline is completely unacceptable.
In case the substances for the mixture have different brands, it is recommended to use the proportion 1:40.
How to Mix Gas and Oil for Weed Eater: Tips from Sears Home Services
When petroling a new chain saw, 20 % more oil is added in the first 3 refuellings. In this case, 1:42 will be used instead of 1:50 and 1:40 will be replaced with 1:33.
A distorted ratio of fuel substances can lead to scuffing, as well as to formation of soot on spark plugs and pistons.
Preparing the right fuel mixture
Before you start the new lawnmower engine, you must also prepare the fuel mix correctly. It is known that for two-stroke engines it is made of special two-stroke oil and gasoline taken in certain ratios. You may find these ratios in the instruction manual of your power tool or on the label of the lubricant. You can also find the recommended fuel and oil type in the manual.
Prepare fuel in small quantities, enough for one cut of grass. Use special fuel canisters made of plastic or separate glass or metal containers. It is better to apply oil with a hypodermic syringe.
When starting a new lawn mower many people have trouble mixing the fuel. The reason for this is the difference between the tool manufacturer’s instructions and the engine oil manufacturer’s instructions. The first ones recommend a ratio of 1:25. The other recommends 1:50. Who to Believe? What to do?
According to experts, if the manufacturers write the proportion 1:25 or 1:30 in the instructions to the brushcutter, then most likely it is either a cheap tool with poor cooling, or the manufacturer does not know what oil the consumer will add. But here it should be understood 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 running. It cokes and clogs the cylinder and piston.
What to do in this situation when running in a new tool? The ideal is to buy the oil that the mower manufacturer recommends. In the case of running-in engines, when there is no possibility to buy the recommended oil, it is better to buy a good two-stroke Husqvarna oil for the gasoline-powered tools of the same name. It is not cheap, but it lasts for a long time. Stir it as written in the instructions on the jar.
Remember, it is best to use the proportion that the oil manufacturer gives. But it’s better to find out by experiment if the recommended oil ratio is correct. If at the proportion recommended by the manufacturer of the grass trimmer, the engine is snotting oil and you can see leaks on it, then the proportion needs to be increased.
You should follow the proportions of oil and gasoline for the fuel mix in the owner’s manual. Chinese manufacturers most often indicate the ratio of 1 part oil to 25 parts gasoline, and STIHL and Husqvarna’s ratio is 1 / 50.29 Jun. 2015 г.
On average, one liter of gasoline is mixed with 20-50 ml of oil. STIHL and Husqvarna, for example, recommend to use 100 ml of oil for 4 liters of gasoline. The specified proportion is optimal for chainsaws up to 1.5 kW. For chainsaws of the same brands with power output above 1.5 kW use a 1/50 ratio (100 ml of oil to 5 liters of gasoline).