How to dilute gasoline for a saw

Ratio of oil and gasoline for chain saws of well-known brands, the right proportions, and what not to dilute

Preparation of the fuel mixture. a very important process, both gasoline consumption and service life of the chain saw depend on compliance with the correct proportions of gasoline and oil. Many are accustomed to mixing it 1:50, but this is not correct.к. the ratio of these two components, all manufacturers have different. In this article let’s understand what the most famous manufacturers recommend to fill in, in what proportions, and give an example of how to dilute and prepare fuel correctly.

Only engine oil for two-stroke engines is added to fuel for chainsaws. Oils for four-stroke engines are categorically not suitable. The reason is that in two-stroke internal combustion engines oil is burned together with petrol.

In automobile and other four-stroke ICE it is poured into a crankcase, has many special additives, and is not originally designed for combustion. If it is poured in a chainsaw, it will smoke, it will not burn out completely and quickly forms a thick layer of carbon deposits, which can eventually put the chainsaw out of order.

In addition to the general “for two-stroke engines” specification, the chainsaw manufacturer may recommend using a specific brand of oil on their model. It may contain special combustible additives and additives that will extend the life of your saw’s engine.

This is what oil looks like for 2-stroke chainsaw engines of the famous Champion brand

Older, Soviet-era two-stroke engines used the same engine oil as four-stroke engines, such as M8. Older motor oils did not contain as many noncombustible additives as modern oils. In order for such unspecialized oil to provide sufficient lubrication of chain saws, higher dosages were used.

When running-in the engine used the proportion 1:20, after 1:25. Large amounts of multipurpose oil, not created for complete combustion, led to rapid coking and sticking of piston rings, formation of soot on the upper part of the piston, spark plugs, cylinder exhaust windows and muffler. The spark in a chainsaw spark plug may disappear for the same reason.

In neglected cases, the windows and the muffler could be completely covered with soot. The thick layer of soot on the piston significantly reduced the volume of the combustion chamber.

Modern special oils for two-stroke engines lubricate components much more effectively. That’s why it’s needed roughly half as much as before. from 1:40 to 1:50.

The engine remains clean and durable for a long time in spite of the lower mechanical resistance of modern engines compared to older ones.

We also recommend to read an interesting article on what chain oil to use and how it can be painlessly substituted.

Parts of the machine and how to fill it

Now we are going to “dive” into the heart of this tool, so that you have at least a general idea of what your “helper” consists of. In essence, this kind of tool can be responsibly classified as a mechanism of classical direction, which operates by engaging the internal combustion engine.

It is no exaggeration to say that this type of tool is the simplest of all other machines, because it has no gearbox and is equipped with a normal two-stroke engine with one cylinder and working on gasoline.

The main advantage of a chainsaw is that it is arranged quite simply, which contributes to increased reliability, as well as trouble-free operation in difficult and demanding conditions. Next, let’s take a closer look at the construction of the saw, so:

• engine;
• clutch;
• ignition system;
• carburetor (cf. carburetor adjustment);
• fuel system;
• air cleaning system;
• starter;
• chain (cf. how to sharpen the chain);
• tire;
• chain brake;
• chain tensioning mechanism;
• chain lubrication system (see Chain Lubrication. chain oil).

In essence, the device is dealt with, but now an important issue is the lubrication of chain saw parts. many people don’t understand what it’s for in the first place? The answer is quite simple, like all mechanisms, the chainsaw, especially its individual parts, require special care, including periodic lubrication.

This is to ensure that your tool will serve you for many years, as during the chainsaw parts produce movement, which should be smooth, smooth, so as not to damage nearby parts.

Everyone knows that friction force breaks the surface. If you don’t lubricate your chainsaw when needed, the spare parts will simply wear out quickly and the tool will come out of the LADA. You need it? I don’t think so. So you need to take care of your chainsaw so that it “has the strength” to serve you for many years.

When choosing a chain saw, you should be guided by your needs, what you want to use it for.

If you will need to take it to the similar, then choose a mini chainsaw.

For woodworking it is better to use circular saws.

Choice of oil

STIHL 180 chain saw oil is mixed with petrol and pumped straight into the fuel tank, unlike in four-stroke engines. We recommend that you fill your chain saw with the oil specified in the instruction manual for each model.

Never use oil intended for low speed engines (boats, scooters, etc.). д.).

It can significantly shorten the life of an engine, and if traces of such a substance are found in the cylinder-piston group, the tool will be considered out of warranty, t. е. The STIHL chainsaw oil is not covered by the warranty and cannot be repaired or exchanged.

Synthetic and mineral STIHL chain saw oils are available in a wide variety of sizes, from 100 ml to 5 liters. Mineral oils are cheaper, and semi-synthetics and synthetics ensure complete combustion while the engine is running, t. е. no fouling and a minimum of toxic compounds in the exhaust.

Besides, synthetic oils retain their qualities over a much wider temperature range, and also contain special additives that are useful for engine operation: antioxidant, detergent, preservative, etc. д.

Depending on the model of chain saw and how often you use it, you can choose the oil that best suits your needs: Oil consumption is low and with semi-synthetic and mineral oils, you don’t have time to use up even a 1 liter bottle.

So in case of small intended scope of work you may not buy a large canister, but limit yourself to a bottle. Only STIHL mineral oils do not have an expiration date.

Oil to petrol ratios for chain saws

There are only 3 ways to mix the oil. But to use any of them you need to measure the components correctly, so that the mixture acquires the desired technical qualities. The main variants of the proportions:

In terms of milliliters 1/50 will correspond to 20 ml of oil for 1 liter of fuel. The others are calculated similarly. It is not recommended to choose them at your discretion and measure by eye. Follow the instructions on the oil pack or on the oil pack that comes with the machine precisely. If they do not match, you should give priority to the one that comes with the saw. They must also be mixed with knowledge of the technology. Add oil to fuel, not the other way around. It has a thicker structure than gasoline and can stick to the walls of the tank, no matter if it is a separate mixing tank or just a fuel tank. To get the right mixture, you need to use gauges:

tables for oil and gasoline

Dosage of oil in the Chinese version

Many chainsaws of Chinese assembly are simplified copies of popular models of European design. Lack of special materials and proprietary technologies contributes to preservation of the outdated petrol and oil ratio of 25:1.

Twice increased consumption of engine oil is compensated by its lower cost. According to the assurance of the developers, the Chinese oils are injected with original components, which contribute to increasing the wear resistance of power units and really extend their designated service life.

According to the conclusion of independent experts, the best brands of Chinese motor lubricants in quality correspond to analogue of European manufacturers of medium price range. This is the level of branded motor oils of the Standard group and partially. Super.

How to recover old gasoline. a step-by-step guide

Gasoline stays undamaged for up to 8 weeks without any deterioration in its structure. After that, it eventually becomes bad gas and causes problems with the engine. Nevertheless, you can use this old gasoline if you know how to recover old gasoline.

For our high-pressure gas washers, chainsaws, lawn mowers and other vehicles, including cars, we need to use gasoline regularly.As a consumer, it is natural that sometimes we forget to use gasoline for a period of time. What’s more, sometimes we buy more than we need. As a result, we may have a significant amount of gasoline left over. In most cases, this unused gas will not start any engine.

Recovering old gasoline won’t make as much profit if you don’t have a lot of gasoline. But, if you have a large amount of gas, you have to restore it. There are several ways to recover old gas.But working is dangerous because gasoline is easily ignited. In this article we are going to discuss the safest ways.

Considering recovering old gasoline

Some key factors determine the need for bad/old gasoline recovery. It is wiser to first calculate feasibility before we start the repair. Below are some factors that you should be aware of:

• The first factor is the amount of gasoline. It is necessary to have a minimum amount of gasoline for recovery.Not because you cannot recover a small amount, but because a small amount is not worth it.
• The second factor is the age of the gasoline. You should go for gasoline aged more than 8 weeks and less than 2 years. Gas with less than 8 weeks of age does not need to be rectified unless it is too heavily contaminated. Gas older than 2 years can be restored, but its efficiency will be unacceptable.
• Another important factor is the contaminant. Any gasoline contaminated with antifreeze, brake fluid, carburetor fluid, or other heavy lubricants cannot be recovered.
• When phase separation reaches the second half of the phase, it becomes difficult to recover the gas. over, if we do try to recover this gas, it will cost us twice as much as buying new gas! So, you need to understand what phase separation is and how it occurs.
• In 95% of the cases we need to use a stabilizer/supplement to restore the old gas. Unfortunately, some manufacturers strictly forbid the use of the additive in their products. So you need to follow the instructions of the appliance for which you are going to use the recovered gas.
• Reconstituted gasoline cannot be used on an engine with a fuel injection system!

Stages of recovering old gas

Any gasoline can fail for three main reasons. All of the causes, along with their solutions, are discussed below. We will discuss those that maintain the sequence in a convenient order. So here you get the 3 steps of restoring old gas. Each step has a specific problem and solution related to bad/fatigued gasoline.

Stage-1: The problem with gasoline formation

The most common problem with gasoline is related to its formation. The older the gasoline, the more likely this problem is to occur. Over time, gasoline deteriorates due to deposits, and oxidation results in the formation of tar. Any particles that act as deposits create a layer on the gasoline.

In addition, due to intense oxidation, undesirable resins are formed in gasoline. These deposits or resins make a difference in the formation of gasoline.Thus, gasoline becomes heavier and gets a serious hindrance to combustion. To restore gasoline suffering from this problem, follow the solution below.

Solution: The most common and simple solution to the above problem is filtration. With filtration we can remove sediment and tar from the gas. You’ll need a fresh mat, a funnel, and a metal pot for this. Place a rug on top of the funnel. Place the funnel on top of the metal pot/cylinder.

Once you pour the old gasoline on the carpet, the carpet will filter out almost 95% of all deposits and tar. Now you need to pump the gas with a standard fuel filter.

Last updated March 23, 2022. / Affiliate Links / Images from Amazon Product Advertising API

The problem caused by water absorption

Another reason old gasoline gets bad is water absorption. Over time, old gasoline absorbs water vapor. Steam contaminates the fuel.Water destabilizes the combustion chamber and causes the engine to stop. To save the gasoline engine, the manufacturer makes the engine sensitive to water-mixed fuel. That way, fuel that comes into contact with water cannot start the gasoline engine. To use this old gasoline, you must remove the water/vapors from it. To do this, follow a simple step.

Solution: Use two airtight metal cans to clean the gasoline containing water/vapors. First of all, pour the gasoline into one of the cans.Wait at least 20 minutes for the mixture to settle. Meanwhile, the water will reach the bottom of the can and the gasoline will form the top of the can. This is because water is heavier than gasoline.

Now pour the gasoline from the first can into the second can. Be sure to take only a layer of gasoline. Leave a layer of water in the first jar. To do this safely, you must leave a small portion of the gasoline layer with water in the first can.

If you want to avoid this manual action, you must use Gmout.Any standard Gumout does an excellent job of cleaning water/vapor/sediment from the fuel. All you have to do is use Gmout during the fuel change. Gumout takes care of the fuel until the next fuel change. Read the owner’s manual to properly use Gumout.

Step 3: The problem with fuel layers

Gasoline is not a homogeneous form of hydrocarbon, but a mixed version of it. The mixer contains both light and heavy fuel. Sometimes over time, this light layer evaporates and the heavier layer becomes difficult to run the engine alone.

Chain oils for saw chain lubrication

The chain is best lubricated with BioPlus oil, because. к. other oils are designed for harsh conditions or winter operation.

Running in of a new tool

This includes the gentle operation of the chainsaw during the initial phase of its operation. The technology also calls for running the engine on a mixture with 20% more m of engine oil.

The running-in time in motor-hours is listed in the included manual. In practice, for the tool to reach the working level, it is enough to work 3-5 fillings of the gas tank of the saw.

New models do not need running-in, but it is not recommended to use the chainsaw with heavy loads during the first hours of operation.