Ignition Chainsaws Al-Ko Bks 35 35

Chainsaws AL-KO BKS 3835 / BKS 4040. Instruction

Ignition Chainsaws Al-Ko Bks 35 35

  • Intended and improper use.
  • Directions
  • Design.
  • Signs on the device.
  • Safety instructions for use.
  • Install guide rail and saw chain.
  • Fuel and chain oil.
  • Control.
  • Sawing.
  • Maintenance.
  • Maintenance of the saw chain and guide bar.
  • Storage.
  • Recycling and environmental protection.
  • Troubleshooting guide.
  • Technical details.
  • Warranty.

Before using our device, please read this manual carefully to familiarize yourself with it. Always store it in an accessible place.

All warnings in this manual are marked with the symbol shown. This symbol indicates important points that must be considered to prevent personal injury. Read these instructions carefully and follow them during operation.

This mark indicates instructions that must be followed to avoid accidents that could result in personal injury or death.

This sign indicates instructions that must be observed to avoid mechanical malfunctions, damage to equipment or its failure.

Read these instructions carefully before using the saw. Keep them in a safe place. Read the instructions carefully. To use the device safely, read the controls. Keep this manual with the chain saw.

Danger of hearing damage!
Under normal operating conditions, the user of this device may be exposed to sound pressure of 80 dB (A) or higher. The chain saw should be held with the right hand on the rear handle and the left. behind the front.

Provide noise protection! Observe the local regulations when working with the device.

Intended and improper use

The chain saw is designed to cut tree trunks, beams and branches (depending on the length of the cut). It may only be used for woodwork. During operation, appropriate personal protective equipment must be used. Use for other purposes, for example, for professional care of a tree crown, is strictly prohibited. Responsibility for material or physical damage caused by improper use lies with the user, not the manufacturer. For this device, only use the saw chains and tire combinations specified in the instruction manual. Intended use also includes adherence to safety instructions and the instructions given in the manual. Everyone who works with the device must know the principle of its operation and be aware of the possible dangers. In addition, the applicable accident prevention regulations must be strictly observed. The regulations regarding occupational health and safety must also be observed. When modifying the device, the manufacturer disclaims all liability for possible damage. The warranty on the device is void. This device is intended for the care of a private garden.

Observe the national regulations for the operation of chain saws (safety at work, environmental protection)!


Even when using the device for its intended purpose, there is a residual risk that cannot be excluded. The design of the device does not allow to exclude the following hazards:

  • contact with an unprotected saw chain (danger of getting cut wounds);
  • sudden accidental movement of the saw bar (danger of getting cut wounds);
  • damage to organs of hearing when refusing prescribed protective equipment;
  • inhalation of harmful particles and exhaust gases emitted by the engine;
  • contact with skin;
  • noise: A certain noise level is inevitable. For noisy work in public places an appropriate solution is needed. If necessary, the time for such work should be limited. Note on "quiet hours". Operating times may be limited. The user and people working in the vicinity should use appropriate hearing protection;
  • vibrations. Warning: The actual vibration level during operation of the chain saw may differ from the data given in the manual or from the manufacturer. The reason for this may be the following factors that should be considered before and during use of the device:
    Compliance with the operating instructions for the chain saw;
    cutting method and material processing technology;
    proper use and condition of the chain saw;
    degree of sharpening and condition of the cutting tool;
    installation of optional vibration-resistant handles and mounting of handles on the chain saw body.

If you experience unpleasant feelings or change the color of the skin on your hands while using the device, take a break. Working without interruptions can lead to local vibrational illness.


Signs on the device

Signs are stamped on the device, compliance with which is necessary for safe operation and safe maintenance. Always follow these instructions.

Safety Instructions for Use

Before working with the device

  • Before using our device, please read this manual carefully to familiarize yourself with it.
  • Do not work with a chainsaw if you are tired, sick, under stress, take medications that make you feel tired, AL-KOgol or drugs.
  • Chainsaw work should be performed in a well-ventilated work area. Do not turn on or use the device in enclosed spaces or buildings. Exhaust fumes contain hazardous carbon monoxide.
  • Do not use the chain saw in conditions of strong wind, bad weather, poor visibility, very high or very low temperatures.
  • Before each tree is AL-KO, check for dead branches that may fall during operation.
  • Use non-slip safety shoes, tight-fitting clothing, and safety glasses, hearing protection and a protective helmet. Put on
    anti-vibration gloves. It is believed that the causes of the so-called Raynaud’s disease, which affects the fingers, can be vibration and cold. Pallor and numbness
    fingers. Since the minimum burden at which the symptoms of this disease occur is unknown, precautions are strongly recommended. Try not to freeze, first of all keep your head, neck, feet, ankles, palms and wrists warm. Take breaks more often, do exercises with intensive use of hands to improve blood flow. Do not smoke. The saw chain must always be sharp. The saw, including the vibration protection system, should be carefully looked after. A dull chain increases the length of cut. When such a chain is pressed through a tree, the vibration load on the hands increases. Vibrations become even stronger with loose parts, damaged or worn dampers. Limit your work time. Even with all these precautions, it is impossible to exclude numbness of the fingers and the appearance of carpal tunnel syndrome. Therefore, with regular or constant use of the device, attention should be paid to the condition of the hands and fingers. If one of the symptoms described above is observed, immediately consult a doctor.
  • When handling fuel, care must be taken. Wipe up spilled fuel. Before starting the engine, carry the chain saw at least 3 m from the refueling point.
  • In places where mixing, transfusion, fuel storage or refueling is carried out, all potential sources of sparks and ignition should be eliminated. Not
    smoke when handling fuel and while using a chainsaw.
  • When starting the engine and while working with the saw, make sure that there are no strangers nearby. There should be no people or animals in the working area. When turned on and in
    During operation of the chainsaw, children, pets and all unauthorized persons must be at least 10 m away.
  • Start work only when the work area is free. Before work, make sure that you are in a stable position and the trunk does not fall on you after the cut. With the engine running, always hold the chainsaw firmly with both hands. Hold the chainsaw handles firmly with your fingers.
  • When the engine is running, be careful: do not allow the saw to touch parts of the body. Before starting the engine, make sure that the chain does not touch objects and
  • When carrying the chain saw, the engine must be turned off, the guide bar and chain must be pointing back, and the muffler should be at a distance from the body.
  • Before each use, check the components of the chain saw for wear, fastening strength and the need for replacement. If the chain saw is damaged, improperly configured, not fully assembled or not strong enough, it must not be used. Note that when the gas lever is released, the chain stops.
  • Except as noted in the user manual, only qualified personnel should perform maintenance on the chain saw (for example, using an inappropriate tool to disassemble the flywheel or hold the handwheel while disassembling the clutch can damage the flywheel structure, which could result in malfunction during operation )
  • Always turn off the engine before placing the chain saw.
  • When cutting small branches and shoots, be especially careful: small pieces can get stuck in the chain and be thrown towards the user.
  • Be careful when cutting a clamped or strained branch so that it does not hit you after releasing or relieving tension.
  • The handles must always be dry and clean, without traces of fuel or a combustible mixture.
  • Beware of recoil of the saw. Recoil. this is the upward movement of the guide bar that occurs when an object falls under the saw chain at the end of the guide bar. Kickback can cause a dangerous loss of control of the chain saw.
  • Before transporting the chain saw, be sure to put the protective cover on the guide bar. The device must be in
    A safe position where fuel leakage, device damage, and personal injury are excluded.
  • Precautions against kickback.

Video: Ignition Chainsaws Al-Ko Bks 35 35

Recoil is possible when the end of the guide bar hits an object or when the saw chain is clamped in the cut.

Contact of the end of the saw bar with any object can cause a lightning reaction: the guide bar is thrown up and towards the user. When the saw chain is clamped at the top of the guide bar, it is possible to quickly push the saw bar towards the user. Any of these reactions can result in loss of control of the saw and, as a result, serious injury.

  • Do not rely solely on the built-in saw guards. When using a chainsaw, certain measures should be taken to prevent accidents and injuries.

(1) If you know what leads to bestowal, you can weaken or eliminate the factor of surprise. Surprise is always fraught with danger of accident.
(2) With the engine running, confidently drive the saw with both hands: with your right hand on the rear handle, with your left. behind the front. Hold the handles firmly and confidently
with your fingers. Strong grip reduces the risk of kickback and allows you to confidently lead the saw. Do not loosen the grip.
(3) Make sure that there are no obstacles in the work area. Avoid contacting the end of the saw bar with a tree trunk, branches or other obstacles that may
meet while working with a saw.
(4) Saw at high speed.
(5) Do not perform work above shoulder height.
(6) Follow the sharpening and maintenance instructions of the chain saw manufacturer.
(7) Use only spare saw tires and chains specified by the manufacturer, or equivalent.

Install guide rail and saw chain

Fuel and chain oil

A special oil is used for engine lubrication, designed for air-cooled 2-stroke gasoline engines. If such oil is not available, use air-cooled 2-stroke engine oil containing antioxidant additives. RECOMMENDED MIXTURE. GASOLINE 40: OIL 1 (JASO FC or ISO EGC for two-stroke engines with air cooling). These engines are certified for use with unleaded gasoline.

Fuel is a flammable substance. It is forbidden to smoke near fuel. Flames and sparks should also be avoided.
1. APPLICATION OF FUEL WITHOUT OIL (UNCLEANED GASOLINE) very quickly causes serious damage to the internal parts of the engine.
2. OIL FOR 4-STROKE ENGINES or 2-STROKE WATER COOLED ENGINES can cause spark plugs to become dirty, clogged outlets, or piston rings sticking.

Preparation of a combustible mixture

  1. Measure the volumes of gasoline and oil to be mixed.
  2. Pour some gasoline into a clean, approved plastic container.
  3. Add all the oil and mix well.
  4. Add the remaining gas and mix for at least a minute.
  5. Label the container so as not to confuse the mixture with gasoline or other liquids.

Chain oil

Regardless of the season, special chain oil should be used.
Do not use waste or refined oil: it may damage the oil pump.


Engine start

1. Unscrew and remove the fuel and oil tank cap. Put the cover in a dust-free place.

2. Fill the device with fuel and fill the oil tank with chain oil to a level of 80%.

3. Screw on the fuel and oil tank caps, wipe off the fuel if spilled.

4. Turn the switch to "I".

5. Continuously press the booster bulb until fuel enters it.

(1) Oil (4) Booster Pear
(2) Fuel (5) Air valve button
(3) Motor switch.

6. Pull out the air valve button. The air valve closes, the gas lever is in the start position.

After pulling the air valve button, it does not return to its working position even when the gas lever is pressed or pressed with a finger. To return the air valve button to its working position, press the throttle lever instead.

1. Slide the guard from the front handle forward to activate the chain brake.

1. As soon as the ignition occurs, press the throttle lever so that the air valve button returns to its operating position and start the engine with the starter handle.

2. Pull the front handle guard onto the handle to release the chain brake. Then, slightly extending the throttle lever, allow the engine to warm up.

Checking the oil supply.

After starting the engine, run the chain at medium speed and check if oil is sprayed as shown.
The amount of oil supplied can be changed with a screwdriver by inserting it into the hole at the bottom of the clutch. Adjust the chain oil supply according to the operating conditions.

(1) Chain oil feed adjustment shaft.
Turn the shaft counterclockwise. increase in quantity. Turn the shaft clockwise. decrease in quantity.

When the fuel has run out, the oil tank should be almost empty. At each refueling, the oil tank must also be filled.

Checking the operation of the clutch.
Before each use, check that the chain is not moving when the chain saw is idling.

During operation, hold the chain saw firmly with both hands: with your left hand on the front handle, with your right. behind the back, even if you’re left-handed.

When the brake is applied, release the throttle to reduce engine speed. During prolonged use with an activated brake, the clutch generates a large amount of heat, which can cause malfunctions.

The brake should be checked daily for proper functioning. To do this, follow these steps:

1) Turn off the engine.
2) While holding the chain saw in horizontal position, release the front handle, touch the stump with the end of the guide bar
or a piece of wood and check if the brake is applied. The braking force depends on the size of the saw bar. If the brake does not apply, contact the service department of our dealer.

Protect the carburetor from freezing.

If the chain saw is operated at temperatures between 0-5 ° C and high humidity, ice may form in the carburetor; this may adversely affect engine power or uninterrupted operation.
(1) Casing of the cylinder. (2) The sun icon. (3) Snowflake badge. (a) Normal mode. (b) Deicing mode. This product is equipped with a vent valve located on the right side of the cylinder cover. Through it, warm air is supplied to the engine, which allows
Avoid icing. Under normal conditions, the saw should be operated in normal mode, that is, in the mode configured at delivery.
If there is a risk of icing, the anti-icing mode must be activated before use. If you continue to use the saw in the anti-icing mode after restoring normal temperature, this may adversely affect the starting of the engine and its operation at the usual frequency. Therefore, as soon as the risk of icing becomes irrelevant, you should switch the saw to normal mode.

Switching the operating mode.

(1) Casing of the cylinder. (2) Air valve button (3) Anti-icing valve
1. Turn off the engine using the engine switch.
2. Remove the air filter cover and air filter, then remove the air valve button from the cylinder cover.
3. Loosen the mounting screws of the cylinder cover (that is, three screws on the inside and one on the outside of the cover) and remove the cylinder cover.
4. Finger-tighten the anti-icing valve on the right side of the cylinder cover and remove it.
5. Adjust the anti-icing valve so that the snowflake icon is on top and reinsert the valve into the cylinder cover.
6. Install the cylinder cover and all other parts to the appropriate places.

Engine shutdown.

1. Release the throttle and let the engine idle for several minutes.
2. Set the switch to "ABOUT" (STOP).

(1) Motor switch.


Kickback protection.

The saw is equipped with a chain brake, which, when used properly, stops the chain in case of kickback. The operation of the chain brake should be checked before each use. To do this, let the saw work for 1-2 seconds at maximum speed, and then take the front manual guard forward. The circuit should stop immediately and the engine should continue to run at maximum speed. If the chain
stops with a delay or does not stop at all, before use it is necessary to replace a brake tape and a clutch drum.

Before each use of the saw, it is imperative to check that the chain brake and chain are working correctly for sufficient sharpening to control the risk of kickback. Removing safety guards, improper maintenance, or errors when replacing a saw bar or chain may increase the risk of serious injury from kickback.


  1. The direction of the fall should be determined taking into account the wind, the inclination of the tree, the location of heavy branches, further actions and other factors.
  2. Free up space around the tree, take a stable position and ensure a safe escape route.
  3. From the side of the fall, make a saw cut in the trunk of the tree a third of its thickness.
  4. On the opposite side of the cut just above its base, perform a felling cut.

Sawing and pruning.

1 Always maintain a stable position and watch for the stability of the tree.
2 Note that the felled trunk may roll back.
3 Read the chapter "Safety Instructions for Use": measures to reduce returns are described there. Before you start, check
the direction of the bending force in the trunk that you are going to saw. Always finish cutting from the opposite side of the bend so that the guide rail does not pinch in the cut.

Cut the trunk without supports.

Saw the trunk to the middle, then turn over and finish the cut on the other side.

Cut the trunk on the supports.

Saw the trunk in section A (see the figure above) one third of its thickness from bottom to top, and then the rest of it from top to bottom. In section B, cut a third of the thickness from top to bottom, and then from bottom to top.


Each time before cleaning, inspecting or repairing the device, make sure that the engine is turned off and cool. To prevent accidental ignition, disconnect the spark plug terminals.

Follow the instructions for regular maintenance, preparation for work, and daily routine maintenance. Improper maintenance can cause serious damage to the device.

Care after each use

3. Guide (saw) tire.
Remove the guide bar and remove the sawdust from the groove and the oil supply pipe.
Lubricate sprocket wheel through grease nipple at end of tire.
(1) Oil supply pipe;
(2) Lube for lubrication;
(3) Asterisk.

4. Other.
Check the device for fuel leaks. Make sure that it is fastened securely and that major components are not damaged, especially the handle seals and the guide rail mountings. Damage should be repaired before the next use of the chain saw.

Regular maintenance work

4. Asterisk.
Check for cracks and heavy wear that could interfere with the chain drive. If wear is severe, replace sprocket wheel. Never install a new chain on a worn sprocket or a worn chain on a new sprocket.

5. Front and rear dampers.
Replace if the glued part has come unstuck or cracks have appeared in the rubber part. Replace if the stop pin abuts against the inside of the metal part of the rear damper and the play increases.

Maintenance of the saw chain and guide bar

Saw chain.

For trouble-free and safe operation, the chain links must be sharpened.

Additional sharpening is required if:

  • sawdust resembles powder;
  • putting a saw into the material requires
  • significant effort;
  • propyl has an indirect form;
  • vibration intensifies;
  • increased fuel consumption.

Chain Linking Requirements

Use protective gloves.

Before filing:

  • Make sure the chain is locked.
  • Make sure the engine is off.
  • Use a suitable round file for the chain.
  • BKS 3835: Oregon 91P
  • BKS 4040: Oregon 91P

File Size: 5/32" (4.0 mm) for 91P. Place the file on the chain link, push it straight forward. Hold the file as shown. After sharpening each link of the chain, check the depth and file to the desired size, as shown in the figure.

The front edge must be carefully rounded to reduce the risk of kickback or breakage of the tension belt.

Make sure that all chain links have the same length and edge angle, as shown.

Guide (saw) tire.

Turn the guide rail over and over to ensure even wear.
The saw bar must always be rectangular. Check the saw bar for wear. Attach a ruler to the tire and the outside of the chain link. If there is a gap between the two points, then the tire is in order. Otherwise, the tire is worn out. Then it should be repaired or replaced.

(1) Ruler (2) Clearance (3) No Clearance (4) Chain tilted.

The table contains a list of all possible combinations of guide rails and chains. Possible combinations are marked with "".

When replacing, only the above guide rails and chains may be used. Unacceptable combinations may result in serious personal injury and damage to the device.


  1. Empty the fuel tank and let the engine run until it runs out of fuel.
  2. Empty the oil tank.
  3. Clean the chainsaw.
  4. Keep the device in a dry place out of the reach of children.

Recycling and environmental protection

Residues of chain oil and mixtures for a 2-stroke engine must not be drained into a sewer, drain or soil. They should be disposed of in accordance with environmental regulations. for example, by handing it over to a collection point or at a waste storage facility. If the device has become unsuitable for further use or if you no longer need it, do not dispose of it with household waste. Dispose of it in accordance with current environmental regulations. Thoroughly empty the oil / grease tank and fuel tank. Dispose of residues: take them to a hazardous substances collection point or waste storage. Dispose of the device itself: turn it over to the appropriate collection / recycling point. Parts made of plastic and metal are sorted and recycled there. Information on the disposal of materials and devices can be obtained from local authorities.