Husqvarna 122LK Manual

Introduction

Product description
Husqvarna 122LK is a power unit with a combustion engine.
Work is constantly in progress to increase your safety and efficiency during operation. Speak to your servicing dealer for more information.

Intended use
This power unit is a bare unit that only function together with approved accessories, refer to Attachments. Make sure to read this manual together with the approved accessory manual.
Note: National regulations can set limit to the operation of the product.

Product overview

1. Loop handle
2. Throttle trigger
3. Stop switch
4. Throttle trigger lockout
5. Spark plug cap and spark plug
6. Starter rope handle
7. Fuel tank
8. Air filter cover
9. Air purge bulb
10. Choke control
11. Operator's manual
12. Starter housing
13. Shaft coupling

Symbols on the product

	WARNING! This product is dangerous. Injury or death can occur to the operator or bystanders if the product is not used carefully and correctly. To prevent injury to the operator or bystanders, read and obey all safety instructions in the operator's manual.
	Read the operator's manual carefully and make sure that you understand the instructions before use.
	Use a protective helmet in locations where objects can fall on you. Use approved hearing protection. Use approved eye protection.
	Use approved protective gloves.
	Use heavy-duty slip-resistant boots.
	Air purge bulb.
	Choke.
	The rating plate shows the serial number. yyyy is the production year, ww is the production week.

Note: Other symbols/decals on the product refer to certification requirements for other commercial areas.

Safety

Safety definitions

Warnings, cautions and notes are used to point out specially important parts of the manual.

Used if there is a risk of injury or death for the operator or bystanders if the instructions in the manual are not obeyed.

Used if there is a risk of damage to the product, other materials or the adjacent area if the instructions in the manual are not obeyed.
Note: Used to give more information that is necessary in a given situation.

General safety instructions

Read the warning instructions that follow before you use the product.

• Use the product correctly. Injury or death is a possible result of incorrect use. Only use the product for the tasks found in this manual. Do not use the product for other tasks.
• Obey the instructions in this manual. Obey the safety symbols and the safety instructions. If the operator does not obey the instructions and the symbols, injury, damage or death is a possible result.
• Do not discard this manual. Use the instructions to assemble, to operate and to keep your product in good condition. Use the instructions for correct installation of attachments and accessories. Only use approved attachments and accessories.
• Do not use a damaged product. Obey the maintenance schedule. Only do the maintenance work that you find an instruction about in this manual. An approved service center must do all other maintenance work.
• This manual cannot include all situations that can occur when you use the product. Be careful and use your common sense. Do not operate the product or do maintenance on the product if you are not sure about of the situation. Speak to a product expert, your dealer, service agent or approved service center for information.
• Examine the product daily for significant damage before each operation or when the product is hit by other objects or falls to ground. Refer to Maintenance schedule.
• Disconnect the spark plug cable before you assemble the product, put the product into storage or do maintenance.
• Do not use the product if it is changed from its initial specification. Do not change a part of the product without approval from the manufacturer. Only use parts approved by the manufacturer. Injury or death is a possible result of incorrect maintenance.
• Do not breathe in the fumes from the engine. Longterm inhalation of the engine's exhaust fumes is a health risk.
• Do not start the product indoors or near flammable material. The exhaust fumes are hot and can contain a spark which can start a fire. Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.
• When you use this product the engine makes an electromagnetic field. The electromagnetic field can cause damage to medical implants. Speak to your physician and medical implant manufacturer before you operate the product.
• Do not let a child operate the product. Do not let a person without knowledge of the instructions operate the product.
• Make sure that you always monitor a person, with decreased physical capacity or mental capacity, that uses the product. A responsible adult must be there at all times.
• Lock the product in an area that children and unapproved persons cannot access.
• The product can eject objects and cause injuries. Obey the safety instructions to decrease the risk of injury or death.
• Do not go away from the product when the engine is on.
• The operator of the product is responsible if an accident occurs.
• Make sure that parts are not damaged before you use the product.
• Make sure that you are at minimum 15 m (50 ft) away from other persons or animals before you use the product. Make sure that persons in the adjacent area know that you will use the product.
• Refer to national or local laws. They can prevent or decrease the operation of the product in some conditions.
• Do not use the product if you are fatigued, ill, or influenced by alcohol, drugs or medicine. They can have effects on your vision, alertness, coordination or judgment.

Safety instructions for assembly

Read the warning instructions that follow before you use the product.

• Remove the spark plug cap from the spark plug before you assemble the product.
• Use approved protective gloves.
• Make sure that you assemble the cover and shaft correctly before you start the engine.

Safety instructions for operation

• Make sure the product is fully assembled before you use it.
• Before a start, move the product 3 m (10 ft) away from the position where you filled the fuel tank. Put the product on a flat surface. Make sure that the cutting attachment does not touch the ground or other objects.
• The product can cause objects to eject, which can cause damage to the eyes. Always use an approved eye protection when you operate the product.
• Be careful, a child can come near the product without your knowledge during operation.
• Do not operate the product if there are persons in the work area. Stop the product if a person goes into the work area.
• Make sure that you are always in control of the product. Make sure that you change the operation positions and take planned rests during operation of the product.
• Do not use the product if you cannot receive aid if an accident occurs. Always make sure others know you will operate the product before you start to operate the product.
• Do not turn with the product before you make sure that no persons or animals are in the safety area.
• Remove all unwanted materials from the work area before you start. If the cutting attachment hits an object, the object can eject and cause injury or damage. Unwanted material can wind around the cutting attachment and cause damage.
• Do not use the product in bad weather (fog, rain, strong winds, risk of lightning or other weather conditions.). Dangerous conditions (such as slippery surfaces) can occur because of bad weather.
• Make sure that you can move freely and work in a stable position.
  
• Make sure that you cannot fall when you use the product. Do not tilt when you operate the product.
• Always hold the product with your two hands. Hold the product on the right side of your body.
  
• Operate the product with the cutting attachment below your waist.
• If the choke control is in the choke position when the engine starts, the cutting attachment starts to turn.
• Do not touch the bevel gear after the engine stops. The bevel gear is hot after the engine stops. Hot areas can cause injury.
• Stop the engine before you move the product.
• Do not put down the product with the engine on.
• Before you remove the unwanted materials from the product, stop the engine and wait until the cutting attachment stops. Let the cutting attachment stop before you or an aid remove the cut material.
• Overexposure to vibration can lead to circulatory damage such as white finger disease or nerve damage in people who have impaired circulation. Contact your doctor if you experience symptoms of overexposure to vibration. These symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin color or condition. These symptoms normally appear in the fingers, hands or wrists.

Personal protective equipment

Read the warning instructions that follow before you use the product.

• Always use approved personal protective equipment when you use the product. Personal protective equipment cannot fully prevent injury but it decreases the degree of injury if an accident does occur. Let your dealer help you select the right equipment.
• Use a protective helmet where there is a risk of falling objects.
• Use approved hearing protection that provides adequate noise reduction. Long-term exposure to noise can result in permanent hearing impairment.
• Use approved eye protection. If you use a visor, you must also use approved protective goggles. Approved protective goggles must comply with the ANSI Z87.1 standard in the USA or EN 166 in EU countries.
• Use a visor for face protection. A visor is not enough for protection of the eyes.
  
• Use gloves when necessary, for example when you attach, examine or clean the cutting equipment. Gloves also help prevent circulatory or nerve damage to the hand and fingers caused by vibration.
• Use sturdy non-slip boots.
• Use clothing made of a strong fabric. Always use heavy, long pants and long sleeves. Do not use loose clothing that can catch on twigs and branches. Do not wear jewelry, short pants, sandals or go with bare feet. Put your hair up safely above shoulder level.
  
• Keep first aid equipment close at hand.
  

Safety devices on the product

Read the warning instructions that follow before you use the product.

• Do not use a product with safety devices that are damaged or do not operate correctly.
• Do a check of the safety devices regularly. Refer to Maintenance schedule.
• If the safety devices are damaged or do not operate correctly, speak to your Husqvarna servicing dealer.

To do a check of the throttle trigger lockout

1. Make sure that the throttle trigger lockout (A) and throttle trigger (B) move freely and that the return spring works correctly.
   
2. Push down the throttle trigger lockout and make sure that it goes back to its initial position when you release it.
   
3. Make sure that the throttle trigger is locked at the idle position when the throttle trigger lockout is released.
   
4. Start the product and apply full throttle.
5. Release the throttle trigger and make sure that the blades stop and stay stationary.
   
   If the blades move when the throttle trigger is in the idle position, then the carburetor idle speed must be adjusted. Refer to To adjust the idle speed.

To do a check of the stop switch

1. Start the engine.
2. Move the stop switch to the stop position and make sure that the engine stops.
   

Muffler

• Do not use an engine with a damaged muffler. A damaged muffler increases the noise level and the risk of fire. Keep a fire extinguisher near.
• Examine regularly that the muffler is attached to the product.
• Do not touch the engine or the muffler when then engine is on. Do not touch the engine or the muffler for a while after the engine stops. Hot surfaces can cause injuries.
• A hot muffler can cause a fire. Be careful, if you use the product near flammable liquids or fumes.
• Do not touch the parts in the muffler, if the muffler is damaged. The parts can contain some carcinogenic chemicals.

Fuel safety

Read the warning instructions that follow before you use the product.

• Do not mix the fuel indoor or near a heat source.
• Do not start the product if there is fuel or engine oil on the product. Remove the unwanted fuel/oil and let the product dry. Remove unwanted fuel from the product.
• If you spill fuel on your clothing, change clothing immediately.
• Do not get fuel on your body, it can cause injury. If you get fuel on your body, use a soap and water to remove the fuel.
• Do not start the engine if you spill oil or fuel on the product or on your body.
• Do not start the product if the engine has a leak. Examine the engine for leaks regularly.
• Be careful with fuel. Fuel is flammable and the fumes are explosive and can cause injuries or death.
• Do not breathe in the fuel fumes, it can cause injury. Make sure that there is sufficient airflow.
• Do not smoke near the fuel or the engine.
• Do not put warm objects near the fuel or the engine.
• Do not add the fuel when the engine is on.
• Make sure that the engine is cool before you refuel.
• Before you refuel, open the fuel tank cap slowly and release the pressure carefully.
• Make sure there are sufficient airflow when refueling and mixing fuel (petrol and two-stroke oil) or draining the fuel tank.
• Fuel and fuel vapor are highly flammable and can cause serious injury when inhaled or allowed to come into contact with the skin. For this reason, observe caution when handling fuel and make sure there is sufficient airflow.
• Tighten the fuel tank cap carefully or a fire can occur.
• Move the product at a minimum of 3 m (10 ft) from the position where you filled the tank before a start.
• Do not put too much fuel in the fuel tank.
• Make sure that a leak cannot occur when you move the product or fuel container.
• Do not put the product or a fuel container where there is an open flame, spark or pilot light. Make sure that the storage area does not contain an open flame.
• Only use approved containers when you move the fuel or put the fuel into storage.
• Empty the fuel tank before long-term storage. Obey the local law on where to dispose fuel.
• Clean the product before long-term storage.
• Remove the spark plug cap before you put the product into storage to make sure that the engine does not start accidentally.

Safety instructions for maintenance

Read the warning instructions that follow before you use the product.

• Stop the engine, make sure that the cutting attachment stops and let the product cool down before you do the maintenance.
• Disconnect the spark plug cap before you do the maintenance.
• The exhaust fumes from the engine contain carbon monoxide, an odorless, poisonous and very dangerous gas that can cause death. Do not run the product indoors or in closed spaces.
• The exhaust fumes from the engine are hot and can contain sparks. Do not run the product indoors or near flammable material.
• Accessories and changes to the product that are not approved by the manufacturer, can cause serious injury or death. Do not change the product. Always use original accessories.
• If the maintenance is not done correctly and regularly, there is an increased risk of injury and damage to the product.
• Only do the maintenance as this operator's manual recommends. Let an approved Husqvarna service agent do all other servicing.
• Let an approved Husqvarna service agent do servicing on the product regularly.
• Replace damaged, worn or broken parts.

Assembly

Introduction

Before you assemble the product, you must read and understand the safety chapter.

Remove the spark plug cable from the spark plug before you assemble the product.

To attach the loop handle

1. Attach the loop handle to the shaft in compliance with the illustration and tighten.
   
2. Make sure that the loop handle attaches before the arrow on the shaft.

To assemble the two-piece shaft

1. Turn the knob to loosen the coupling.
   
2. Align the tab of the cutting attachment (A) with the notch of the coupling (B).
   
3. Carefully push the shaft into the coupling until you hear a click.
   
4. Tighten the knob fully.
   

To disassemble the two-piece shaft

1. Turn the knob 3 turns or more to loosen the coupling.
   
2. Push and hold the button (C).
   
3. Hold tight to the end of the shaft that the engine is attached to.
4. Pull the attachment straight out of the coupling.

Operation

Introduction

Before you operate the product, you must read and understand the safety chapter.

Fuel

This product has a two-stroke engine.

Incorrect type of fuel can result in engine damage. Use a mixture of gasoline and two-stroke oil.

Premixed fuel

• Use Husqvarna premixed alkylate fuel for best performance and extension of the engine life. This fuel contains less harmful chemicals compared to regular fuel, which decreases harmful exhaust fumes. The quantity of remains after combustion is lower with this fuel, which keeps the components of the engine more clean.

To mix fuel

Gasoline

• Use good quality unleaded gasoline with a maximum of 10% ethanol contents.
  
  Do not use gasoline with an octane grade less than 90 RON/87 AKI. Use of a lower octane grade can cause engine knocking, which causes engine damages.

Two-stroke oil

• For best results and performance use Husqvarna two-stroke oil.
• If Husqvarna two-stroke oil is not available, use a two-stroke oil of good quality for air-cooled engines. Speak to your servicing dealer to select the correct oil.
  
  Do not use two-stroke oil for water-cooled outboard engines, also referred to as outboard oil. Do not use oil for four-stroke engines.

To mix gasoline and two-stroke oil

Small errors can influence the ratio of the mixture drastically when you mix small quantities of fuel. Measure the quantity of oil carefully and make sure that you get the correct mixture.

1. Fill half the quantity of gasoline in a clean container for fuel.
2. Add the full quantity of oil.
3. Shake the fuel mixture.
4. Add the remaining quantity of gasoline to the container.
5. Carefully shake the fuel mixture.

Do not mix fuel for more than 1 month at a time.

To fill the fuel tank

Obey the procedure that follows for your safety.

1. Stop the engine and let the engine become cool.
2. Clean the area around the fuel tank cap.
   
3. Shake the container and make sure that the fuel is fully mixed.
4. Remove the fuel tank cap slowly to release the pressure.
5. Fill the fuel tank.
   
   Make sure that there is not too much fuel in the fuel tank. The fuel expands when it becomes hot.
6. Tighten the fuel tank cap carefully.
7. Clean fuel spillage on and around the product.
8. Move the product 3 m/10 ft or more away from the refueling area and fuel source before you start the engine.

Note: To see where the fuel tank is on your product, refer to Product overview.

To examine before start

1. Make sure that the product has no missing, damaged, loose or worn parts.
2. Make sure that nuts, screws and bolts are tightened.
3. Make sure that the air filter is not clogged.
4. Make sure that the safety devices on the product operate correctly and are not damaged.
5. Make sure that the product has no fuel leaks.

To start a cold engine

1. Push the air purge bulb 10 times.
   
2. Set the choke control in the choke position.
   
3. Hold the body of the product on the ground with your left hand.
   
   
   Do not step on the product.
4. Pull the starter rope handle slowly with your right hand until you feel resistance. Then pull the starter rope handle quickly and with force until the engine starts or tries to start.
   
   Do not twist the starter rope around your hand.
5. Set the choke control in the operation position.
6. If the engine starts, push the throttle trigger lightly and let the engine run 60 seconds to become warm. If the engine does not start, pull the starter rope handle until the engine starts. Then push the throttle trigger lightly and let the engine run 60 seconds to become warm.
   
   Do not pull the starter rope to full extension and do not let go of the starter rope handle. This can cause damage to the product. Release the starter rope slowly.

To start a warm engine

1. Push the air purge bulb 10 times.
2. Pull the starter rope until the engine starts.

To stop the product

• Push the stop switch to stop the engine.
  

Note: The stop switch automatically goes back to its initial position.

Maintenance

Introduction

Before you do maintenance, you must read and understand the safety chapter.
For all servicing and repair work on the product, special training is necessary. We guarantee the availability of professional repairs and servicing. If your dealer is not a service agent, speak to them for information about the nearest service agent.
For more detailed information, refer to.

Maintenance schedule

To adjust the idle speed

Make sure that the air filter is clean and the air filter cover is attached before you adjust the idle speed.

1. Turn the idle speed screw T, which is identified with a "T" mark, clockwise until the cutting attachment starts to rotate.
   
2. Turn the idle speed screw T, which is identified with a "T" mark, counterclockwise until the cutting attachment stops.
3. The idle speed must be below the speed when the cutting attachment starts to rotate. The idle speed is correct when the engine operates smoothly in all positions.

To do maintenance on the spark arrester screen

• Use a wire brush to clean the spark arrester screen.
  

To clean the cooling system

• Clean the air intake (A) on the starter and the cooling fins (B) on the cylinder with a brush.
  

To examine the spark plug

Use the recommended spark plug. Make sure that the replacement is the same as the manufacturer supplied part. An incorrect spark plug can cause damage to the product. Make sure that the spark plug is installed with a supressor. Speak to your servicing dealer for more information.

1. Examine the spark plug when:
   1. the engine is low on power.
   2. the engine is not easy to start.
   3. the engine does not operate correctly at idle speed.
2. If, the engine is not easy to start or operate, examine the spark plug for unwanted materials. To decrease the risk of unwanted material on the spark plug electrodes:
   1. make sure that the idle speed is correctly adjusted.
   2. make sure that the fuel mixture is correct.
   3. make sure that the air filter is clean.
3. Clean the spark plug if it is dirty. Make sure that the electrode gap is correct. Refer to Technical data.
   
4. Replace the spark plug when it is necessary.

To apply grease to the two-piece shaft

• Apply grease to the end of the drive shaft after each 30 hours of operation.
  

To clean the air filter

1. Remove the air filter cover and remove the air filter.
   
2. Clean the air filter with warm soap water. Make sure that the air filter is dry before you install it.
3. Replace the air filter if it is too dirty to fully clean it. Always replace a damaged air filter.
4. If your product has a foam air filter, apply air filter oil. Only apply air filter oil to a foam filter. Do not apply oil to a felt filter.

To apply air filter oil to the air filter

Always use special air filter oil on foam air filters. Do not use other types of oil.

Do not get oil on your body.

1. Remove the air filter cover and remove the air filter.
   
2. Put the air filter in a plastic bag.
3. Put the air filter oil in the plastic bag.
   
4. Push the plastic bag to make sure the oil supplies equally across the air filter.
5. Push on the air filter, while in the bag, to remove the air filter oil that is not necessary. Remove the air filter from the bag.
6. Install the air filter.

Troubleshooting

The engine does not start

The engine starts but stops again

Transportation and storage

• Always allow the product to cool down before storage.
• For storage and transportation of the product and fuel, make sure that there are no leaks or fumes. Sparks or open flames, for example from electrical devices or boilers, can start a fire.
• Always use approved containers for storage and transportation of fuel.
• Empty the fuel before transportation or before longterm storage. Discard the fuel at an applicable disposal location.
• Remove the spark plug cap from the spark plug.
• Attach the product during transportation. Make sure that it cannot move.
• Clean and do servicing on the product before longterm storage.

Technical data

1. Reported data for equivalent sound pressure level for the product has a typical statistical dispersion (standard deviation) of 1 dB (A).
2. Reported data for equivalent vibration level has a typical statistical dispersion (standard deviation) of 1 m/s²

Accessories

Attachments

Customer assistance
For customer assistance, call: 1-800-487-5951 or visit www.husqvarna.com.