Stihl MS-660 chainsaw China: instruction manual, characteristics Stihl MS-660 - how to use

Description

The Shtil 660-ms chainsaw is a professional chainsaw for performing complex, heavy work with hard wood, equipped with a 50 cm saw bar. It can easily cut even such dense types of wood as larch, acacia, hornbeam, birch, yew and others. Designed for work of varying duration and complexity, it can be used for domestic purposes and as a professional working tool.

Chainsaw Stihl 660-MS

Distinctive characteristics of the Stihl 660-ms chainsaw:

• the power of the two-stroke gasoline engine is 7.1 hp, which is equal to 5220 W;
• moderate level of fuel and oil consumption;
• ease of use in difficult conditions;
• possibility of long-term operation even at low air temperatures;
• the saw is as safe as possible to use if you follow the usage technique described by the manufacturer in the instructions;
• The chain saw is capable of sawing logs with a maximum diameter of 50 cm or more.

Purpose of the Shtil 660-ms chainsaw:

• cutting hardwood (sawmills, forestry enterprises, forestry departments);
• processing of fruit trees with large branches;
• clearing areas overgrown with wild trees;
• construction of wooden structures (sheds, barns, saunas, baths);
• if desired, the chainsaw can be used in homemade sawmills - this is evidenced by reviews from owners who have similar experience in operating chainsaws

Where do they sell fake STIHL chainsaws?

They can sell you a copy of the STIHL MS 660 chainsaw at shopping centers, in country houses and even in the courtyards of your home. Prices start at $100 and depending on your bargaining ability, can drop to $50.

As a rule, scammers use the same story:

1. They used chainsaws to pay wages at a construction site or factory.
2. We bought a stolen shipment cheaply.
3. It was already purchased, but friends or mother-in-law gave me five more pieces.
4. You need to drink or urgently need money.
5. Lots of fakes on message boards.
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If you need a chainsaw for a couple of days, and you are not going to cut down wood on an industrial scale, then STIHL MS 660 chainsaw will be very useful to you. The Chinese fake, although of worse quality than the original, is quite capable of “cutting” wood; in ancient times, people coped with more meager tools. You don’t mind dropping it, throwing it, catching nails, etc. You can pour anything into the tank as long as it burns, and after it breaks, throw this chainsaw into the attic and forget it like a bad dream.

When demonstrating the operation of the product, it seems to you that the saw is good. This illusion is due to the fact that sellers fill the tank with pure gasoline. After the performance, the resource of the “unfinished business” is reduced by 50%. If you bought into the trick and purchased it, then use the saw as is, with the fuel that the seller filled in.

The design and principle of operation of the Stihl MS 660 chainsaw carburetor

The carburetor of this model consists of almost 50 parts, including fastening elements.

Main components of the Stihl MS 660 chainsaw carburetor:

• The body is made of light alloys of non-ferrous metals, with channels for supplying the fuel-air mixture, and a storage chamber.
• Diffuser and chamber in the housing for atomizing fuel.
• Jets with calibrated holes for dosed fuel supply.
• Air and throttle valves.
• A needle valve for opening and closing the gasoline supply channel from the tank.
• An elastic membrane that determines the position of the needle valve.
• Manual fuel pump for starting a cold engine (primer, or suction).

When you first start a cold chainsaw engine, gasoline is pumped up manually with the primer button. The first jerks of the starter are made with the air damper closed. After setting and during engine operation, the air damper opens.

During operation of the internal combustion engine, a vacuum is formed in the combustion chamber, and the mixture is sucked in automatically.

At idle, the flow of mixture is limited by a closed throttle valve with an opening for the passage of a small amount of fuel.

The position of the throttle valve is adjusted when the chainsaw is operating using the gas handle. When you press the handle, it opens, increasing the fuel supply to the internal combustion engine, and vice versa.

On a note! A mixture with low gasoline content and a large amount of air is called lean. Conversely, a mixture with more gasoline and less air is called enriched.

For normal operation of the internal combustion engine, the mixture must be optimal in the proportions of fuel and air, which is achieved by adjusting the carburetor of the Stihl MS 660 chainsaw.

Basic configuration, equipment, country of assembly and production

The basic package of the stihl 660-ms saw includes:

• saw part (represented by a chain, sprocket and bar);
• chainsaw body with engine and fuel tank;
• owner's instructions;
• warranty document, usually found in the manual for the technical device;
• chain saw chain tension screw.

A detailed list of components and parts of the stihl 660-ms chainsaw can be found in the instruction manual. The country of assembly and production of the original Shtil 660-ms chainsaw is the USA, since the company's production facilities are located in this country. Germany is considered the birthplace of the brand.

On the domestic garden equipment market you can often find analogues or counterfeits of the stihl 660-ms chainsaw model, the documentation for which indicates the country of origin is China. Note that the Chinese analogue of the original Shtil 660-ms chainsaw is not the original. However, taking into account the reviews of the owners of such “copies”, it can be noted that the Chinese copy is quite suitable for everyday use.

The original will cost about 29.5 thousand hryvnia (probably higher, since a single price for the model has not been established). The Chinese equivalent will cost about three times less.

The fake Shtil 660-ms chainsaw is not equipped with additional accessories, like the original. Some online stores may offer customers original accessories for original stihl devices as a bonus. How much an original chainsaw will cost depends on whether the product in front of you is a branded product or a fake.

Purpose and technical characteristics

Shtil MC 660 is a chainsaw for professionals. Its price immediately makes it clear that it is intended for those who make money with it, because... it is indecently high compared to the price of household chainsaws. But don’t think that Calm 660 is not worth the money that sellers are asking for it. Buyers pay for quality, high power, huge resource, reliability and unpretentiousness.

As of today, Stihl 660 has already been discontinued because... instead, a more modern model Shtil 661 is produced, but the chainsaw can still be purchased from an authorized dealer.

The purpose of this chainsaw is specific, because its power allows you to buck the trunks of large trees and work on mobile sawmills such as “Logosol” or “Murka”.

Below is a video about the use of the 660 model calm in a mobile sawmill.

The saw has a power of 7.1 hp and weighs more than seven kilograms. Due to its large weight and power, this model is not advisable to use for trimming branches or during construction work; it is needed specifically for felling and bucking.

As standard, the chainsaw was supplied without a saw set, which means the buyer has the opportunity to choose the required bar length and chain design.

What is the difference between the Stihl MS 660 carburetor and the Stihl MS 650

Stihl MS 660 and MS 650 belong to the same class of powerful professional chainsaws; they are similar in technical characteristics and design. Stihl MS 660 has a combustion chamber volume of 91.6 cc with a power of 7.1 hp.

Stihl MS 650 – 84.9 cc and 6.7 hp. They have almost identical carburetors in appearance, which are regulated according to the same algorithm.

The design differences are that the carburetors of the Stihl MS 650 chainsaw use calibrated holes in the jets and channels of smaller diameter.

The original German carburetor on the Stihl MS 660 chainsaw is not a consumable component that must be replaced after a certain service life. The service life it is capable of may exceed the life of the chainsaw as a whole.

A chainsaw is a technically complex tool that needs to be serviced from time to time. Cleaning, replacing filters and, of course, adjusting the carburetor of the chainsaw will help it last its entire lifespan. In this article we will look at the issue of carburetor tuning. How and why it is carried out.

User manual

The instruction manual contains complete information about the tool and introduces the new owner of the saw to the features of its use and operating techniques.

The instructions consist of the following sections:

1. The device of the petrol saw “Shtil” MS-660.
2. Requirements for safe operation and maintenance of Stihl chain saws.
3. Table of technical characteristics of the MS-660 model.
4. Preparing the saw for the first start.
5. Features of the running-in period.
6. Chainsaw maintenance.
7. Table of faults, their causes and solutions.

Device

What components does the Stihl ms-660 chainsaw consist of? We invite you to familiarize yourself with the detailed diagram of the “Calm” chainsaw:

Stihl ms-660 chainsaw device

Preparing the Stihl MS-660 chain saw for use

Before starting operation, according to the instructions, you must:

• assemble the saw according to the instructions;
• prepare and fill in the fuel mixture and lubricating oil;
• check the tension of the fasteners;
• adjust idle speed and lubrication supply to the chain.

The ratio of fuel to oil is 50/1 (for 5 liters of fuel there is 100 ml of oil). The manufacturer recommends using original Stihl oil for two-stroke engines and AI-92 unleaded gasoline.

Running in the MS 660 Stihl chain saw

The German quality of the “Calm” chainsaw requires the use of this tool without special running-in; idling for more than 10-15 seconds is especially harmful - carbon deposits appear on the spark plug.

For saws of this brand, running-in means the following:

1. A gentle mode of operation not at full power of the power plant for a time sufficient to burn 4-8 full tanks of the fuel mixture.
2. The first hour of operation consists of cycles: work - 2 minutes, idling - 10 seconds, rest.
3. A properly prepared mixture of original Shtil oil and AI-92 gasoline in a ratio of 1/50.

Maintenance

Before starting work:

• checking the chain (sharpening);
• chain tension;
• checking the tension of fasteners;
• pouring flammable mixture and oil;
• checking lubrication;
• idling.

After use:

• the chain weakens;
• cleaning the saw from wood residues, dust and dirt;
• filter cleaning;
• monitoring the condition of the saw set (tires, chains, sprockets), replacement, sharpening, repair if necessary.

During scheduled inspections, idle speed is adjusted, the carburetor and filters are cleaned, and do-it-yourself repairs are feasible.

Malfunctions and repairs

We list the typical problems with the Stihl 660 chain saw.

Chainsaw “Calm” does not start:

• the flammable mixture has run out;
• fuel lines are clogged;
• there is no contact on the spark plug;
• I/O wire is broken;
• the pump does not pump fuel;
• the ignition is not configured;
• the candle was flooded;
• the candle is smoked or burnt out.
• The saw does not develop speed:
• carburetor clogged;
• the spark plug needs to be replaced;
• The spark plug needs to be cleaned from carbon deposits.

The chainsaw stalls at idle. The reason is that the carburetor settings have gone wrong.

STIHL Ms 660 Carburetor Adjustment

The carburetors of most chainsaws have three screws for adjustment:

• L – jet screw for low speed adjustment
• H – jet screw for adjusting high speeds
• Screw. T at Partner and Husqvarna (at Shtil LA) - adjusting
  the idle speed of the chainsaw

Screws H and L adjust the ratio of the mixture of gasoline and air, determined by the opening of the carburetor throttle valve. When the screws are unscrewed, the mixture becomes richer, and the speed increases accordingly; when the screws are tightened, the mixture becomes leaner - the speed drops.

The T(LA) screw is designed to adjust the idle speed. The main “tuning” of the chainsaw is done at the manufacturer during the final test. The carburetor , as a rule, is adjusted to supply a richer (than optimal) fuel mixture. The factory setting must be maintained for the first hours of operation of the saw. Then (optional) more precise adjustment of the carburetor is made.

We begin the adjustment by adjusting the idle speed; to do this, rotate the T screw (LA) counterclockwise, achieving a complete stop of the chain at stable engine speeds.

Design features of the Chinese fake Shtil

Fake chainsaw Stihl MS 660

The Chinese version of Shtil MC 660 is very different from its original brother not only in technical parameters, but also in appearance. You can evaluate the power and reliability of a Shtil chainsaw only by putting it into working condition. If this is not possible, you need to pay attention to several details that literally catch your eye.

In the Chinese version, the starter housing differs from the original. In the German chainsaw, the oil and fuel tank caps are made to fit a combination screwdriver included in the package. In the Chinese version they are convex.

You can distinguish a fake by the air filter cover. It opens with a screw, which in the fake version is located on top. Probably, in this case, the package will not include a proprietary instruction manual.

Other distinctive characteristics of Shtil

It should be noted that you can purchase Stihl 660 in Russia only from official dealers of the company. You cannot find such equipment on the market. At the buyer's request, the official representative is obliged to provide a quality certificate made in gray color.

Each original instrument is equipped with a serial number located in three places:

Chainsaw "Stihl" - original and fake

• on the body under the muffler;
• on the packaging box;
• in the original warranty card.

All three numbers must be identical.

On each link of the original saw chain there is the letter S, which is absent on counterfeit products. But the main distinguishing feature is the price. The cost of the original Shtil chainsaw varies between 43-60 thousand rubles. You can buy a Chinese fake Shtil 660 by paying no more than 10 thousand rubles.

Related video: Chainsaw STIHL MS 660

Differences between a branded chainsaw and a high-quality fake

Unfortunately, a high-quality original has become a model for the production of lower-cost, second-rate counterfeits, which are sold under the trademark of a well-known brand.

The fake largely copies the appearance and design of the basic STIHL MS 660 model, but is inferior to it in basic operational functions and characteristics.

Experts recommend purchasing tools from official dealers and only if you have a special certificate.

In appearance, the fake Shtil is different:

• rough casting of the engine crankcase;
• lack of a sticker with a serial number;
• with a STIHL sticker on the sprocket cover instead of an embossed lettering.

China supplies Russia with cheap spare parts, the only advantage of which is their lower cost. Parts and components made from low-quality materials produce less than half of their required service life.

Repairs performed using cheap spare parts usually result in additional costs to eliminate undesirable consequences.

About the manufacturer Stihl

In the early twenties, the stihl company was born, the head of which was the unsurpassed engineer A. Shtil.
In the first years of its activity, the company was exclusively engaged in the production of steam boilers and washing machines. But apparently this was not enough for the manufacturer and chain saws began to appear from his machines. Today, this manufacturer is represented by a huge company, which consists of more than thirty enterprises located throughout the globe. The manufacturer began to produce motorcycles taking into account the fact that these products will serve perfectly for consumers, both for construction work and for gardening and household needs. And the most important thing that I would like to emphasize is that chainsaws of this brand are the best and most popular all over the world.

Chainsaw Shtil 660 is democratic and accessible. As a rule, the price of the Chinese chainsaw Shtil ms 660 ranges from 3100 to 5500 rubles. To see the rating of chainsaws for the dacha, go here.

STIHL MS-660: how to distinguish a fake from the original?

On the territory of the Russian Federation, the right to sell official Shtil products is granted exclusively to legitimate dealers. It follows from this that it is impossible to buy an original saw in spontaneous markets and from dubious private traders. Official representatives have a certificate made in gray color, which must be provided upon the first request of the buyer.

The instrument has a sticker with a serial number, which is duplicated on the plastic case under the muffler. In addition, this index is indicated on the packaging box. All three numbers must match.

The tire has one large hole. How to start a Stihl chainsaw, starting a Stihl chainsaw, how to properly start a Stihl 180 chainsaw first start-up video original stihl ms 180 chainsaw. Counterfeits often have an additional small socket, supposedly intended for lubrication. Chinese fake 660 original stihl ms 660 and compare with 660 – chainsaw for. However, this is a deception - the manufacturers of the original modification provided a lubrication unit with a reserve of oil, which is quite enough for the entire period of use.

In addition, the standard chain has the letter S on each link, unlike counterfeit copies. The original model uses a minimum of stickers (there are ones on the handle where safety rules are written). The main STIHL logo cannot be glued on.

Chainsaw “Stihl” MS 660: learning to distinguish the original from the fake

Our market is flooded with fakes that not only undermine the reputation of well-known brands, but also endanger the lives and safety of users. Chainsaws "Stil" are no exception.

In order to purchase an original American model “Stihl” MS 660, and not a low-quality Chinese assembly, pay attention to:

• tightening fuel tanks, which are originally designed for a combination screwdriver;
• location of the air filter cover, which should be on top of the saw;
• availability of original operating instructions;
• body color. For comparison, take a look at the photo of the fake saw (above) and the original "Stihl" (below);
• presence of a serial number under the muffler. It must match the number listed on the warranty documents.

Purchasing at authorized Shtil sales points is one of the most important ways to avoid getting caught in a counterfeit and to avoid breakdowns.

Model description, power, purpose

The Shtil 660-ms professional chainsaw is a powerful tool for professional tasks in cutting wood of any density. It can work with hard wood and has a saw bar whose length is 50 cm. This saw can be used to cut acacia, yew, birch and other types of wood from which expensive furniture is made. This chain saw can also be used for household purposes.

Chainsaw STIHL 660 MS

The main purpose of the Shtil 660-ms chainsaw is:

• sawing hard wood in sawmills and forestry;
• clearing areas of dry trees and bushes;
• construction of baths, barns, saunas, sheds;
• The chainsaw is suitable for installation in sawmills - according to reviews from those owners who have already used a Stihl chainsaw in similar structures, the chainsaw copes with its functions perfectly;
• cutting down large branches from fruit trees.

Characteristics of the Shtil 660-ms chainsaw, which distinguish it from its analogues:

• 5220 W motor, equivalent to 7.1 hp;
• rational consumption of oil and gasoline;
• easy operation even under high loads;
• the saw can operate outdoors in temperatures down to -30 degrees;
• maximum safety and ergonomics of the tool;
• clear instructions with maintenance recommendations;
• The chain saw is used for cutting logs with a diameter of more than 50 cm; you can cut along the log (longitudinal cut).

Chainsaw STIHL 660 MS

Owner reviews

Last year I bought 3 STIHL 660 chainsaws for my company. The equipment showed itself well - safe, with a large reserve of power, although it is heavy, it is easy to operate. Only professionals should be given such tools. A novice logger forgot to add oil to the gasoline, causing the engine to seize. Spare parts are expensive and take a long time, which means downtime and additional costs.

READ Choosing an angle grinder with speed control

If you adhere to all points of the operating rules, the saw produces excellent performance with low fuel consumption. I recommend this technique for carrying out industrial work on a large scale. In skillful hands, it brings good profits.

I live outside the city in a private house with a large plot of land. In winter we heat with wood, as there are plenty of dry trees around. The tool, although heavy, is convenient and economical. Easily fells trunks up to 80 cm thick, without even reaching maximum speed. Having installed a 40 cm tire, I cut off the branches, which is quick and convenient. In order not to waste time chopping wood, I immediately cut the logs along the grain.

Recently I helped a relative in construction. For a week, the chainsaw worked almost continuously from morning to evening. First, they dismantled the old buildings, then sawed timber for a new house. The tool performed excellently, not a single breakdown, only the gasket burned out.

I work in a team of lumberjacks. Last week I received a new STIHL 660 for use. At first there were doubts and concerns - the device is heavy and expensive. But while felling the forest, I realized that this is an excellent, powerful and well-balanced machine. After running in, it easily cut through hardwood trees without stopping, jamming or breaking. Tires are easy and quick to change. It takes several minutes to cut down and clear the branches of 1 trunk. The handles are comfortable and non-slip. There is no fatigue even at the end of a busy shift.

Technical characteristics of the saw

This kind of chainsaw is simply irreplaceable when working with sawing large tree trunks, and is also great for harvesting wood from hard structures.
The STIHL MS 660 is a true professional that embodies sophistication and practicality thanks to its design. Today, millions of consumers use this tool and unanimously speak about its undeniable advantages. So, let’s first get acquainted with exactly what features this “giant” of technology has:

• First of all, I would like to emphasize that this tool is quite strong, powerful and capable of coping with the most difficult loads;
• secondly, an important advantage is that the chainsaw runs on gasoline; it is this feature that allows you to work with it regardless of whether there is a power source nearby;
• This tool is equipped with a unique system, namely anti-vibration. The important thing is that today only a few models can boast of this kind of individuality. In addition, this feature allows you to reduce the degree of hand fatigue during work, since it is no secret that strong vibrations become too heavy during work. Anyone who has experienced similar activities will undoubtedly understand without explanation. Moreover, the stress on your hands in the form of vibrations causes poor blood circulation, and this can negatively affect your health;
• chain inertia brake , which is designed to protect your hands in case there is a strong kickback when pressing the protection (front). This mechanism stops automatically and almost immediately. This feature allows you to maximize your safety while operating the tool;
• Important is the presence of chain tension, namely the side tension, which also serves as your kind of protection from unforeseen situations. There is a screw (tension) on the side of the chain sprocket cover. This feature protects your hands from dangerous elements on the saw, for example, such as a chain that is quite sharp and a stop with a serrated surface. See how to sharpen a chainsaw chain with a grinder here.
• The saw of this model is equipped with a valve (decompression), the main task of which is to remove the unnecessary part of the mixture located directly in the cylinder when you start the engine. This kind of advantage allows you to significantly reduce the effort when pressing the cable (starter), which is directly responsible for starting. In addition, this feature will not only make your work easier, but also reduce wear on the starting system itself;
• The manufacturer has supplemented this model with a fairly practical lubrication system, which in detail can be said to measure the required amount of lubricant on the chain and spikes, literally down to the drop. Compliance with the ratio of gasoline and oil for a chainsaw is very important in order to save money. The correct ratio is the reason that you will consume less oil, well, fifty percent, that’s for sure. Chainsaw chain oil can be purchased at any specialty store.

Now let's talk directly about the technical characteristics of this model. So:

• the tool is equipped with a powerful engine with a total volume of 91.6 cm2;
• instrument power – 5200 W;
• total weight – 7.3 kg;
• the length of the bar on the chainsaw is about 63 cm;
• device chain pitch – from 3 to 8 cm;
• the tool is equipped with two tanks - oil and fuel with volumes of 825 and 350 cm2;
• idle speed – 2500 rpm;
• maximum speed – 13500 rpm;
• vibration level – 7.0 m/s2;
• sound pressure level – 101 dB;
• sound power level – 109 dB.

The cost of the saw corresponds to the manufacturer's stated characteristics.

What is the price

The Chinese-assembled product, the Stihl MS-660 chainsaw, is highly popular for its reliability, safety and ease of use. Users note the low level of noise and vibration during operation of the unit, long service life and the ability to operate in winter conditions. A significant disadvantage for many professional lumberjacks and land owners is the price of the tool and spare parts for it. Sometimes you have to wait a long time for the necessary parts, which negatively affects the logging process.

A new factory-installed product costs between 70,000-75,000 rubles. The variation in cost is determined by the buyer’s place of residence, the status of the trading organization and the choice of method of delivery of the goods. Used tools in good condition can be purchased cheaper. They offer to buy it for 50,000-65,000 rubles, depending on the condition and degree of wear. Offers indicating a lower price should be rejected. There is a high probability of buying a fake that will not last long.

Do-it-yourself adjustment of the Stihl MS 660 chainsaw carburetor

All carburetors on Stihl MS 660 chainsaws are factory tuned at equipped stands. This ensures the best operating parameters of the internal combustion engine in all modes. Settings are rarely lost. Before making adjustments, you need to make sure it is necessary. Deterioration of internal combustion engine performance may be caused by other reasons:

• The air filter is clogged.
• The spark extinguishing grill and the muffler outlet pipes are clogged with carbon deposits.

If there are no problems with them, or they have been eliminated, and the internal combustion engine is not working normally, begin adjustment.

The carburetor of the Stihl MS 660 chainsaw has three adjusting screws:

• LA for idle speed adjustment.
• H for adjusting fuel supply at high speeds (main screw).
• L to adjust the proportions of fuel and air (mixture quality screw).

Screws L and H are located next to each other, LA is located at a distance from them. All of them are marked on the body.

What is needed for adjustment

To access the adjustment, simply remove the top housing cover and the air filter. Therefore, the only tool required is a screwdriver for the slots of the adjusting screws.

To professionally adjust the carburetor, you will need an electronic tachometer. It accurately indicates idle and maximum speed. Idle speed of the Stihl MS 660 chainsaw is 2,500 rpm, maximum speed is 13,000 rpm.

Without a tachometer, the quality of carburetor adjustment is determined by ear and by the actual operation of the chainsaw’s internal combustion engine.

Standard or basic adjustment

Screws H and L are tightened clockwise until the end, counting the number of revolutions made. Their number is written down or remembered. If the carburetor adjustment fails to start the engine, this data will allow you to return to the original factory settings.

• Screws H and L are unscrewed back counterclockwise, each by 1 turn.
• Start the engine and check its operation by ear or with a tachometer.
• If the speed drops (chokes) when you press the throttle, screw H is unscrewed another 1/4 turn.
• If, when you press the throttle, the engine runs as if idling, tighten screw L 1/4 turn.

Each Stihl MS 660 chainsaw that has been in operation for some time has its own characteristics, including the compression ratio in the cylinder. Therefore, the setting is individual. By turning screws H and L by 1/4 - 1/3 turns in one direction or another, optimal operation of the chainsaw engine is achieved at medium and maximum speeds.

Current setting

Experienced operators may notice during their work that the internal combustion engine of the chainsaw has begun to work worse. Sometimes it is enough to turn the screws H and L alternately in one direction or another by a small step of 1/5 - 1/6 of a turn and immediately check the result of the carburetor adjustment in real operation. This is one of the easy ways to achieve good tuning.

The video material contains information on how to adjust the carburetor of a chainsaw and check the result of the adjustment.

Idle speed adjustment

This is done using the LA screw.

Adjustment is required if the engine stalls at idle - few revolutions, or the chain spins - many revolutions.

The speed is reduced by tightening the LA screw counterclockwise until the chain stops, then unscrew it back 1/5-1/4 turn.

Adjustment with the LA screw is almost always required after adjusting the L screw, which also changes the ICE operating parameters at idle.

Screws LA and L regulate idle speed in fundamentally different ways. L changes the quality and quantity of fuel supply through calibrated holes. LA is called "jumper" because it affects the throttle position at idle speed.

Carburetor adjustment

The power of the power unit and its efficiency directly depend on the correct settings of the fuel system.

• The carburetor adjustment performed by factory specialists needs correction only when the octane number of gasoline changes, the transition to winter or summer operating modes, or a significant deviation of the engine from standard power characteristics.
• The work is carried out after cleaning the air cleaner with the engine running. By rotating the quantity and quality screws, the engine is brought to a mode of fast acceleration and stable idle speed.
• If the adjustment does not give positive results, the problem is solved by flushing the carburetor and purging the jets, refueling the system with fresh, high-quality fuel.

The reason for the decrease in real power and performance may be wear of the piston group, which manifests itself in the second half of the overhaul life.

Chinese version

Chinese Calm 660 is very different from the original in technical characteristics and appearance.

An experienced craftsman will determine at first glance that it is a fake. For those who do not understand gas tools, we recommend immediately paying attention to such details as:

1. The starter housing is clearly different from the original;
2. The oil and fuel tank caps, in the original saw, are made to fit a combination screwdriver, which should be supplied with the saw. In the Chinese version, the lids are convex and unsightly;
3. An air filter cover, the screw of which is located on the top, and not on the back, like the real Shtil 660;
4. The original saw always comes with a proprietary instruction manual.
5. Although the colors of the fakes imitate the real ones, they are still not so bright and beautiful.

The original Stihl chainsaw always has a serial number. It is located on the body, immediately below the muffler. The number is also duplicated with a small sticker; it is also indicated in the company warranty card.

Upon closer inspection, you will notice that the Chinese version has a smaller volume and, accordingly, power, and the parts are made of poor quality and poorly fitted.

In fact, a counterfeit can be sold under any brand. In order for a Chinese saw to turn from Shtil to Husqvarna, careless manufacturers only need to change the sticker on the starter, and the color of the chainsaw may remain the same.

Now you know how to distinguish a fake, let's figure out what to do if you bought it.

Chainsaw Stihl ms-660

The Stihl ms-660 chainsaw is a professional tool that allows you not only to cut down trees, saw trees, saw boards, but also to cross-cut very large trunks, as well as use the saw to work on mobile sawmills such as “Murki” or “Logosol”. The basic package of the device does not include a saw set. This allows the new chainsaw owner to choose a tire and chain variation to suit himself and his needs.

The Shtil MS-660 chainsaw weighs 7.3 kg. and has the following characteristics: equipped with a high-performance carburetor two-stroke engine of Stihl’s own production, the power of the power plant is 7.1 liters. With. Overheating protection is air, manual starting from an inertia starter, ignition system is contactless. The launch control is carried out with one lever (both cold and hot). A decompressor is built in to make starting easier. If necessary, the inertia chain brake will instantly stop the unit.

The carburetor is a diaphragm carburetor with a built-in compensator, which allows you to level out the power of the power plant and ensure almost complete combustion of the fuel-air mixture, resulting in cleaner exhaust. The structure of the carburetor does not allow the chainsaw operator to independently adjust the engine speed, but it does allow the idle speed to be adjusted, at which the chain should not move. There is a heated carburetor, which is effective during cold weather.

The chain tension is lateral, simplified, with maximum protection for the operator’s hands. To protect the engine from contamination, a reusable air filter is provided. Lubrication of the cutting element at specific points saves up to 50% of lubricants. Anti-vibration protection of the handles takes care of the operator’s health.

Chainsaw Stihl ms-660 at work

According to the instructions, the chainsaw operator can install a tire of either 40-50 cm or 90 cm (maximum length) on the unit. The Oilomatic cutting chain is selected accordingly with ⅜-inch pitches. The cutting body with pobedite tips dulls 4 times less, the quality of the cut is improved.

There are three modifications of the Shtil MS-660 chainsaw:

1. Standard modification MS-660.
2. Chainsaw Stihl Magnum 660 - engine power increased to 7.61 hp. With.
3. Chainsaw “Shtil” MS-660, equipped with a heated handle system.

We invite you to familiarize yourself with the technical characteristics of the standard model of the Stihl MS-660 chainsaw:

Chinese chain saw STIHL MS 660

So far the new one is working great.
A Husqvarna 365 chainsaw, a Chinese analogue of the Swedish brand, was ordered on Aliexpress, the order was received

The Stihl ms-660 chainsaw is a professional tool that allows you not only to cut down trees, saw trees, saw boards, but also to cross-cut very large trunks, as well as use the saw to work on mobile sawmills such as “Murki” or “Logosol”. The basic package of the device does not include a saw set. This allows the new chainsaw owner to choose a tire and chain variation to suit himself and his needs.

The Shtil MS-660 chainsaw weighs 7.3 kg. and has the following characteristics: equipped with a high-performance carburetor two-stroke engine of Stihl’s own production, the power of the power plant is 7.1 liters. With. Overheating protection is air, manual starting from an inertia starter, ignition system is contactless.

The carburetor is a diaphragm carburetor with a built-in compensator, which allows you to level out the power of the power plant and ensure almost complete combustion of the fuel-air mixture, resulting in cleaner exhaust. The structure of the carburetor does not allow the chainsaw operator to independently adjust the engine speed, but it does allow the idle speed to be adjusted, at which the chain should not move. There is a heated carburetor, which is effective during cold weather.

The chain tension is lateral, simplified, with maximum protection for the operator’s hands. To protect the engine from contamination, a reusable air filter is provided. Lubrication of the cutting element at specific points saves up to 50% of lubricants. Anti-vibration protection of the handles takes care of the operator’s health.

Chainsaw Stihl ms-660 at work

According to the instructions, the chainsaw operator can install a tire of either 40-50 cm or 90 cm (maximum length) on the unit. The Oilomatic cutting chain is selected accordingly with ⅜-inch pitches. The cutting body with pobedite tips dulls 4 times less, the quality of the cut is improved.

There are three modifications of the Shtil MS-660 chainsaw:

1. Standard modification MS-660.
2. Chainsaw Stihl Magnum 660 - engine power increased to 7.61 hp. With.
3. Chainsaw “Shtil” MS-660, equipped with a heated handle system.

Currently reading: Adjusting the carburetor of a chainsaw: how to adjust and configure

There are many reviews about these chainsaws on the Internet. Basically, owners note their good technical characteristics, build quality and high functionality.

Anatoly, 38 years old

"Hello. I have been working for a logging company for 12 years. I received a Stihl MS-660 chainsaw at my disposal. There is nothing bad to say - good characteristics, works great, starts in both winter and summer, the engine does not overheat too much, in winter I turn on the heated handles and carburetor. Excellent saw, 8-10 hours of work daily - normal operation! I wanted to find the same one in stores - it’s no longer produced, they write in reviews that there is an improved version 661.”

Sergey, 43 years old

“The saw is excellent, I’ve been using it for 9 years now, I use it to prepare firewood for myself and my family, and sometimes I use it on a homemade sawmill. I built a house about 4 years ago, I couldn’t do it without her! Yes, it is professional, with good characteristics and very expensive, but with its help I ensured a comfortable existence for my family. I leave positive feedback."

Alexander, 41 years old

“I bought a chainsaw 3 years ago, according to reviews, I liked the characteristics, I work in logging, it cut perfectly, the Pobedit spray on wood went like clockwork. But this year there was a problem - the starting cable pulled out, but did not retract back, the work stopped... I found a service center according to the instructions, but I’ve been waiting for the result for 1.5 months. Work is idle."

Other characteristics

If you want to know how to distinguish a fake STIHL chainsaw, you should familiarize yourself with the typical characteristics of the MC-660 model. The following are the features of a German-made tool:

• Classification group – high-power chainsaw for professional activities.
• The effective volume of the power plant (cubic cm) is 91.6.
• Power indicator (kW) – 5.2.
• Motor power (hp) – 7.1.
• Weight (kg) – 7.3.
• The ratio of mass and power of the unit (kg/kW) is 1.4.
• Operating chain type: Oilomatic Rapid Micro at 3/8 pitch.
• Tire size (mm) – 500.

If you decide to purchase a STIHL MS 660, how to distinguish a fake, the price of which is sometimes comparable to the original? Firstly, this is a heavy instrument in every sense, weighing more than 7 kilograms and with a power of over seven horsepower. The saw can be used in industrial workshops, with continuous operation over a long period.

This unit costs at least 45 thousand rubles in retail sales. The fake copy has similar dimensions and weight, but the power rating is half as much, and the duration of continuous operation is significantly lower, plus the insufficient strength of the body and working parts.

Sources used:

• https://proogorod.com/selhoztekhnika/sadovaia-tekhnika/benzopily/obzor-benzopily-stihl-660-ms
• https://arendavlg.com/benzopily/kak-otlichit-kitayskuyu-benzopilu-stihl-ms-660-ot-originala.html
• https://benzopilok.ru/brend/stihl/benzopila-ms-660.html
• https://fermerinform.ru/benzopila-stihl-ms-660/
• https://machinspec.com/lesozagotovitelnaya/benzopila/shtil-ms-660.html
• https://opilah.ru/benzopily-tcepnye/benzopila-shtil-660-ms-obzor
• https://specmahina.ru/benzopila/stihl-660.html
• https://vsekarby.ru/benzoinstrument/benzopily/karbyurator-stihl-ms-660.html
• https://fb.ru/article/279023/benzopila-stihl-ms–kak-otlichit-poddelku

Specifications

A two-stroke power unit with a volume of 91.6 cm3 and a power of more than 7 hp runs on a fuel mixture consisting of high-octane gasoline and motor oil for two-stroke internal combustion engines in a 4:1 ratio. The autonomy of the chainsaw in remote areas is ensured by a fuel tank with a capacity of 830 ml.

The advantages of the engine:

• starter with easy start system;
• long service life;
• convenient access to adjustment and service units;
• flexible traction parameters and large torque reserve;
• stability of performance characteristics in difficult weather and climatic conditions.