Adjusting the carburetor of a chainsaw - expert advice, instructions

Situations in which adjustment is necessary

New chainsaws are supplied by the manufacturer with already adjusted carburetors. This is called standard adjustment. But for the normal running-in process, it is necessary to reduce the maximum engine speed and adjust the carburetor. After break-in, the chainsaw needs fine tuning to achieve maximum engine efficiency.

Also, a signal for cleaning and adjustment is increased fuel consumption, which negatively affects the operation of the exhaust system. Simply put, the chainsaw begins to smoke heavily and the muffler becomes clogged with carbon deposits, which in turn will lead to a decrease in power.

If there is too much fuel in the mixture, engine parts are poorly lubricated and premature wear occurs. Also, a poor quality mixture can cause the engine to jam due to overheating (this is one of the reasons why the chainsaw will not start).

This is what a jammed, overheated piston looks like from a disassembled chainsaw with an incorrectly configured carburetor.

Adjustment is necessary when the engine does not idle, stalls, or does not develop full power. Carburetor adjustment should be carried out with clean air and fuel filters. We also recommend reading an interesting article that details the main reasons why a chainsaw starts and immediately stalls.

Echo chainsaw models - overview of design features and characteristics

Let's look at the most popular models of gasoline chain saws, Echo.

Chainsaw Echo CS 452ESX

This Echo chainsaw model is successfully used both for domestic purposes and for felling forests. The saw design includes a durable magnesium alloy crankcase, a durable clutch drum with a removable ring, a forged connecting rod and crankshaft. Among the technical characteristics of the unit, the following should be highlighted:

Cylinder volume – 45 cm3;
Saw power – 2.26 kW or 3.1 l. With.;
Oil tank capacity – 270 ml;
Operating weight – 7.3 kg.

This Japanese chainsaw is distinguished by a unique motor layout, proper balancing and comfortable ergonomic handles.

Other advantages include economical fuel and oil consumption.

Chainsaw Echo CS 260TES 10”

This Echo chainsaw is great for home use. It has a simple design, which makes tool repair quite convenient and quick.

This model is considered the lightest in its class, equipped with a system to facilitate starting and an effective inertia brake. Unit characteristics include:

Cylinder volume – 27 cm3;
Saw power – 1.7 l. s., or 1.2 kW;
Fuel tank capacity – 245 ml;
Working weight – 4.4 kg.

This chainsaw successfully copes with sawing small logs, as well as cutting down dry branches. The tool kit includes a chain, bar, case and documentation.

Chainsaw Echo CS 270WES 12”

This Echo chainsaw is equipped with an improved easy start system and a modified inertia brake.

The design of the model also includes capacitor ignition with a digital control device. Other features of the saw include:

Cylinder volume – 27 cm3;
Model power – 1.16 liters. s., or 850 Watt;
Oil tank volume – 155 ml;
Operating weight – 5.2 kg.

This unit successfully copes with sawing small logs and clearing the garden of dry branches. Thanks to its small dimensions, the saw easily fits into an ordinary travel bag.

Chainsaw Echo CS 3050 14”

Among the design features of this model, the presence of a triple protective coating on the cylinder walls should be highlighted.

This makes the tool much more reliable than units from other companies. The design also includes 6 shock absorbers that reduce vibration on the handles. Other features of the saw include:

Cylinder volume – 35 cm3;
Saw power – 1300 Watt or 1.72 liters. With.;
The volume of the lubricant tank is 155 ml;
Weight when assembled for use is 5.4 kg.

This Echo chainsaw works well for a variety of household tasks. The complete set of the unit consists of a chain, a bar, a cover and documentation.

Chainsaw Echo CS 310ES 14”

This durable Echo chainsaw is popular for its versatility and simple design.

Among the features of the tool are:

Cylinder volume – 30.7 cm3;
Saw power – 1.4 l. s., or 1500 watts;
The volume of the fuel tank is 255 ml;
Oil tank capacity – 160 ml;
Operating weight – 6.1 kg.

This chainsaw copes well with periodic sawing of logs, cutting down small branches and trees. The model is supplied with a tire, chain, case and documentation.

Chainsaw Echo CS 350 WES 14”

This Echo chainsaw is characterized by low fuel and oil consumption, as well as high engine life.

Other features of the saw include:

Cylinder volume – 36 cm3;
Tool power – 1650 Watt or 2 liters. With.;
Fuel tank capacity – 375 ml;
Oil tank volume – 315 ml;
Ready-to-use weight: 5.5 kg.

The CS 350WES 14” model is equipped with a combination wrench, chain, bar, case and documentation.

Chainsaw Echo CS 350TES 12”

This saw produces virtually no vibration due to two effective springs that dampen motor vibrations.

For precise cutting, the Echo 350 model is equipped with a toothed stop. Other features of the saw include:

Cylinder volume – 36 cm3;
Saw power – 1460 Watt or 2 liters. With.;
Fuel tank capacity – 375 ml;
Oil tank volume – 240 ml;
Operating weight – 5.5 kg.

This unit is excellent for regularly cutting down small and medium-sized branches, as well as for harvesting wood for further construction.

Chainsaws Echo CS 352ES 14” and CS 353ES 14”

These models are intended for regular use for domestic purposes, as well as for logging.

They have an improved design, which includes an automatic oil supply system, a vibration damping device and an inertia brake. Other features of chainsaws include:

Cylinder volume – 34 cm3;
Model power – 2.12 and 2.1 liters. With.;
The capacity of the fuel tank is 320 and 260 ml, respectively;
The volume of the oil tank is 200 and 250 ml, respectively;
Operating weight – 5.6 and 6.2 kg, respectively.

Each saw includes a chain, guide bar, durable case, combination wrench and documentation.

Chainsaw Echo CS 361WES 14”

The design of this model includes a high-quality motor with a forced air cooling system, a modified clutch and an effective vibration damping system.

Among the advantages of this model are low oil and fuel consumption, low weight and a balanced center of gravity. Other features of the unit include:

Cylinder volume – 36 cm3;
Saw power – 2.3 l. s., or 1660 watts;
Fuel tank capacity – 325 ml;
Oil tank volume – 235 ml;
Operating weight – 6 kg.

This saw copes well with harvesting wood for household needs and construction, and can also be used to lighten forests.

Chainsaw Echo CS 3700ES 16”

This reliable chainsaw is in demand due to its efficiency and balanced design.

The model is optimally suited for use in the garden and forest. This tool is often used in construction for sawing beams. The characteristics of the unit include:

Cylinder volume – 36 cm3;
Saw power – 1500 Watt or 2.95 liters. With.;
Fuel tank capacity – 415 ml;
Oil tank volume – 245 ml;
Weight – 6.9 kg.

The saw comes with service tools, a cover, a bar, a chain and documentation.

Chainsaw Echo CS 4200ES 16”

This unit has a simple design and high-quality parts that significantly increase its service life.

The saw is equipped with an oil pump, which can be adjusted. Other features of the CS 4200 ES include:

Cylinder volume – 40 cm3;
Saw power – 2.6 l. s., or 1890 watts;
Fuel tank volume – 415 ml;
Oil tank capacity – 455 ml;
Operating weight – 6.8 kg.

The model is equipped with a high-quality combination wrench, a durable bar, chain, case and documentation.

Chainsaw Echo CS 450 15”

This model is equipped with a nylon air filter that does not require frequent cleaning.

The saw cylinder is coated with a special compound that increases the service life of the tool. Other features of the saw include:

Cylinder volume – 45 cm3;
Model power – 1900 Watt or 2.6 liters. With.;
Fuel tank capacity – 460 ml;
Oil tank volume – 275 ml;
Saw weight – 7.45 kg.

The saw is supplied with a chain, bar, cover, warranty card and instruction manual.

Chainsaws Echo CS 510 15 and CS 5100

These models are universal units. They can be used both for felling trees in the forest and for trimming dry branches in garden plots.

Chainsaw features include:

Cylinder volume – 59 and 60 cm3, respectively;
Power – 3.5 and 3.7 liters. With. respectively;
Fuel tank capacity – 600 ml;
Oil tank volume – 300 ml;
Weight – 6.5 and 6.7 kg, respectively.

Each model includes an instruction manual, a warranty card, a chain, a tire and a cover.

Chainsaw CS 600 Echo and CS 620SX 18”

These chainsaws have earned popularity due to their high power and reliability. They are successfully used in extreme conditions, and at the same time show excellent results and high speed.

Among the characteristics of the models are:

Cylinder volume – 60 and 62 cm3, respectively;
Power – 4 and 4.2 liters. With. respectively;
Fuel tank capacity – 575 ml;
Oil tank volume – 300 ml;
Operating weight – 7.7 and 7.9 kg, respectively.

These chainsaws will become indispensable when it is necessary to cut down a large number of small and medium-sized trees. They consume small amounts of fuel and lubricant.

Tools

To adjust, you will need the following tools: tachometer, screwdrivers, and in rare cases, special keys. Let's look at their purpose, necessity of availability and cost.

Tool	Purpose	Price	Availability
Tachometer	Allows you to accurately determine engine speed and adjust them according to the requirements of the manufacturer. You can do without it by tuning by ear, but you need to understand that the tuning will not be done accurately. Therefore, in our tool repair service we use a high-quality and inexpensive tachometer, which can be ordered on Aliexpress using this link.	900 – 2000 rubles 500 – 600 rubles on Aliexpress	Recommended
Screwdriver set (slotted screwdriver)	On most chainsaws, you will need a simple flathead screwdriver to turn the adjustment bolts.	300 – 700 rubles	Necessarily
Special adjustment key	For example, to adjust the carburetor on Husqvarna chainsaws, you will need a special key; it is available only in certified service centers authorized for repairs by the manufacturer. This measure is aimed at reducing breakdowns due to incorrect settings by inexperienced users and those who carry out repairs without official permission to do so.	Out of stock	Depends on the chainsaw

If possible, setting up a chainsaw should be carried out in official service centers that have a manufacturer’s certificate and appropriate permission to carry out repair work.

Modification Huter BS-45M

Huter BS 45 has one improved modification, which is sold under the Huter BS 45M label.

It differs from its older sister with a slightly higher power (1.8 kW) and a shorter tire. The length of the bus supplied with Huter BS is 45 m 40 cm. This model uses a chain with a pitch of 3/8, therefore the headset from the modified model is not suitable for BS 45.

Otherwise, the chainsaws are actually similar, except for the price. Usually, the modified model is little more expensive.

Sources:

https://rodinapress.ru/ogorod/karbyuratory-benzopil-Huter-8212-ustroysTVo-regulirovka-i-remont https://benzopilok.ru/brend/Huter/benzopila-bs-45.html

How is the carburetor adjusted?

The chainsaw setup algorithm is quite simple and consists of the following steps:

Warming up the engine to operating temperature ( the adjustment must be carried out only on a warm engine , this will allow for more accurate adjustment).
Adjusting the engine for smooth operation at low speeds.
Setting the carburetor to properly supply the fuel mixture at maximum speed.
Precise adjustment of the carburetor for idle operation.
Checking the chainsaw in all modes.

Almost all carburetor models have three adjustment screws.

Screw (T) is responsible for fine adjustment in idle mode.
Screw (H) adjusts operation at maximum speed.
Screw (L) regulates mixture formation at low speeds.

By tightening screws (L) and (H), the fuel supply and mixture become leaner, and the speed increases accordingly.

Carburetor adjustment screws L - minimum speed and H - maximum engine speed.

Now let’s look at how to properly adjust a chainsaw carburetor in more detail.

Step-by-step disassembly instructions

The carburetor design of models of different brands is almost the same, so let’s take the Partner chainsaw as an example. We carefully remove each element and place it in order to make it easier to assemble later.

Process description

If the chainsaw carburetor is not adjusted and it is not possible to start the chainsaw, then the adjustment begins by installing screws (L) and (H) to the standard setting position. This is 1/5 turn of the screws until they are fully tightened.
After which, you need to start the engine, let it run a little and warm up.
The next step is setting the low speed mode. Optimal engine operation at low end can be achieved by adjusting the screw (L) and idle speed (T). To do this, first screw (L) is tightened until maximum engine speed is reached, then released by 1/4, and screw (T) is used to return the idle speed to normal.
After adjusting the operation at the “lower” range, the traction and maximum engine speed are adjusted. To do this, slowly tighten the screw (H) and check the speed using the readings of the electronic tachometer. It is unacceptable to exceed the maximum engine speed declared by the manufacturer! The ideal option for this would be to use an electronic tachometer, which can be bought at a low price on Aliexpress.

Buy tachometer on Aliexpress

Location of carburetor adjustment screws on a Husqvarna chainsaw.
An important step is to check the saw in all operating modes after adjustment; to do this, you need to let the chainsaw cool, and then start it according to the cold tool starting algorithm. If the saw starts up normally and idles smoothly, you need to check how it cuts. If during the inspection process shortcomings in the power of the chainsaw are discovered, then it is necessary to repeat the adjustment of the screw (H) by unscrewing it and checking the traction in operation.

Loss of traction at the maximum speed recommended by the manufacturer is an indicator of CPG wear or poor fuel quality. Speaking of fuel, 90% of malfunctions are caused by fuel. Which one should I use? 92 or 95? How long can it be stored? We answered all these questions in the article about what kind of gasoline to put in a chainsaw.

We recommend watching a video on how to clean and adjust a chainsaw carburetor, the author of which also talks about the harmful effects of fuel on the components of the carburetor. The example shows how to restore your carburetor using an inexpensive repair kit.

Advantages and disadvantages

The main advantage of the BS 45 and BS 45M chainsaws is their price, which is actually half the price of rival chainsaws. You can verify this by looking at Yandex’s offers, which indicate approximate prices.

Another positive point is the availability of warranty and post-warranty service. The craftsmen of the Huter company undergo special training, so when you send your saw for repairs, you can be careful about its quality.

In technical terms, the advantages of these chainsaws are their high power and long tires, which allow you to cut thick tree trunks without much difficulty.

Curious! The Huter BS-45 chainsaw has the ability to adjust the oil supply for chain lubrication, which allows you to increase the supply of lubricant when sawing dirty wood. Because of this, the service life of the saw set can be significantly extended.

READ Do-It-Yourself Adjustment of the Champion 137 Chainsaw

These chainsaws have few disadvantages, but they are quite significant.

Build quality (after purchase, they need to be tightened with screws).
Low quality plastic parts.
The fuel and oil tank caps quickly wear out and begin to leak (it's easy to change, but it causes inconvenience and trouble).
The motor has a short lifespan due to the poor quality of the parts from which it is assembled.
Weight. Working with a Huter BS 45M (BS 45) chainsaw for a long time is quite difficult. Especially if you need to cut small growths.

All the disadvantages of a chainsaw are directly related to its price. If you remove them, it will cost even more.

Adjusting the carburetor of a Chinese chainsaw

Carburetors installed on Chinese-made saws are made similarly to European ones and have the same adjustment screws.

Adjusting the carburetor of a Chinese chainsaw follows the algorithm presented above, and differs in that when initially adjusting the screws (L) and (H), they must be turned out two turns. Next, the carburetors of the Chinese saw are adjusted in the same way as European ones.

Read about how to adjust the carburetor of a Chinese chainsaw in just 3 steps here (a very useful article). As an example, we recommend looking at the article about adjusting the carburetor on a Carver chainsaw.

Purpose

The Huter BS 45 chainsaw is a household tool; it is not recommended to be used for industrial logging, since it has a limited resource, due to the fact that manufacturers tried to save a lot when developing it. But, despite this, the chainsaw has established itself as a reliable household assistant, with the help of which you can prepare firewood for the winter, maintain the site, and saw off anything at a construction site. Provided timely maintenance is carried out, the saw can last for more than one year.

The Huter BS 45 chainsaw is not suitable for outdoor enthusiasts, as its weight and dimensions are above average.

The chainsaw manufacturer, the German company Huter, has been represented on the Russian market since 2000.

According to the manufacturer, the Huter BS-45 saw is German, but if you look closely, it becomes clear that this is another creation of the Chinese industry, imported into our country under the German brand.

Although this is a Chinese version of a chainsaw, the fact that it is sold under the Huter gives it some advantages. The saw is covered by a warranty; the company’s specialists also carry out post-warranty repairs; there are no problems with servicing the Huter 45.

A video review of the Huter BS 45 can be seen below. After watching, you will find out what the chainsaw looks like and how it is equipped. Familiarize yourself with the main components. The video also shows how to properly start a chainsaw in cold and hot weather and how it cuts.

Summing up

Having sufficient experience, the setup is completed in 5-10 minutes. Provided all carburetor parts are in good working order, the adjustment process should not cause any difficulties. If something is faulty in the carburetor, then you won’t be able to adjust it, no matter how hard you try. To do this, before making adjustments, you need to eliminate all faults.

I will write about what kind of malfunctions there are, how to find and fix them, in the next article about repairs, provided that this is of interest to you. Therefore, if the article helped, rate it and write in the comments below whether the second part of the article is needed. Thanks to all.

Application of Patriot PT 3816

Patriot PT 3816 is a non-professional chainsaw model and is intended for private use. For example, Patriot 3816 will cope with tasks such as annual collection of firewood in small volumes, trimming tree branches in the garden, and reducing waste. In addition, the saw is used in fence construction to cut wooden posts.

The Patriot 3816 saw cannot be used by deforestation professionals due to resource constraints. The chainsaw parts are made well, but they are not designed to work in harsh conditions for long periods of time. The engine cylinder is entirely aluminum, which means it is resistant to long-term operation and even slight overheating. If the Patriot 3816 installs a chrome plated cylinder, the engine life will increase from time to time.

If you take a close look at the Patriot 3816, you will immediately see its resemblance to typical Chinese chainsaws.

We invite you to watch a video about the Patriot PT 3816 chainsaw, in which the owner shows the equipment and explains the main characteristics.

What to do if you have no experience and can’t adjust it yourself?

Due to lack of experience, adjusting the chainsaw may not work the first time, the saw will begin to work unstably, and starting the engine will be difficult. In this case, you need to repeat everything all over again, setting the adjusting screws to the initially recommended position (written at the beginning of the article, immediately after flushing the carburetor) and then follow the steps of the “Step-by-Step Instructions”.

For reference! Chinese carburetors are cheap and cost 1000-1500 rubles (you can look at how much it costs for your saw on Yandex.Market), some people come to the conclusion that it is easier to buy and replace, in the hope that it comes already configured and screwed on factory settings are set. This opinion is erroneous; any carburetor needs to be adjusted after installation.