Husqvarna W520 Professional Walk-Behind Mower User Manual

Husqvarna W520 Professional Walk-Behind Mower

Introduction

Product description
The product is a pedestrian-controlled rotary lawn mower. The grass is collected in a grass catcher. Remove the grass catcher to get rear discharge of the grass. Attach a mulch kit (accessory) to cut the grass into fertilizer.

Product overview (Fig. 1)

1. Handle / handlebar
2. Blade brake control
3. Drive bail
4. Start inhibitor
5. Starter rope handle
6. Grass catcher
7. Handle height adjustment
8. Cutting height control
9. Dipstick / oil tank
10. Cutting cover
11. Muffler
12. Spark plug
13.  Air filter
14. Fuel tank
15. Rear cover
16. Operator’s manual

Intended use
Use the product to cut grass. Do not use the product for other tasks.

Symbols on the product

• (Fig. 2)Not careful or incorrect use can result in injury or death to the operator or bystanders.
• (Fig. 3)Read the operator’s manual carefully and make sure that you understand the instructions before use.
• (Fig. 4) Keep persons and animals at a safe distance from the work area.
• (Fig. 5) Use approved hearing protection.
• (Fig. 6)Stop the engine and remove the ignition cable before repairs or maintenance.
• (Fig. 7) Oil
• (Fig. 8) Fast
• (Fig. 9) Slow
• (Fig. 10) Stop the engine
• (Fig. 11) Choke
• (Fig. 12) Blade clutch
• (Fig. 13) Look out for thrown objects and ricochets.
• (Fig. 14) Keep hands and feet away from the rotating blade.
• (Fig. 15) Keep hands and feet away from the rotating parts.
• (Fig. 16) Before and while walking rearward, look behind and down for small children, animals or other risks that can cause you to fall.
• (Fig. 17) Keep persons and animals at a safe distance from the work area.
• (Fig. 18) Slope hazard.
• (Fig. 19) The exhaust fumes from the engine contain carbon monoxide, an odourless, poisonous and very dangerous gas. Do not run the product indoors or in closed spaces.
• (Fig. 20) Do not run the product indoors or in closed spaces.
• (Fig. 21) Risk of explosion.
• (Fig. 22) Hot surface
• (Fig. 23) The engine is supplied without oil.
• (Fig. 24) Fill with oil before you use the product.
• (Fig. 25) Do not use E85 fuel.
• (Fig. 26) Keep the product away from open flames.
• (Fig. 27) Scannable code.

Note: Other symbols/decals on the product refer to certification requirements for some markets.

California Proposition 65 (Fig. 28)
Product liability
As referred to in the product liability laws, we are not liable for damages that our product causes if:

• the product is incorrectly repaired.
• the product is repaired with parts that are not from the manufacturer or not approved by the manufacturer.
• the product has an accessory that is not from the manufacturer or not approved by the manufacturer.
• the product is not repaired at an approved service center or by an approved authority.

Safety

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

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

Safe practices for pedestrian-controlled mowers
General information
WARNING: Read the warning instructions that follow before you use the product.
WARNING: This product is capable of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in serious injury or death.

• Read, understand, and follow instructions and warnings in this document, the operator’s manual, on the product, on the engine/motor and on the attachments.
• Only allow operators who are responsible, trained, familiar with the instructions, and physically capable to operate the product.
• Do not carry passengers and keep bystanders away.
• Do not operate the product while under the influence of alcohol or drugs.
• Follow the manufacturer’s recommendation for wheel weights or counterweights.

Preparation before operation

• WARNING: Read the warning instructions that follow before you use the product.• Clear the operating area of any objects which could be thrown by or interfere with operation of the product.
• Keep the area of operation clear of all bystanders, particularly small children. Stop the product and attachment(s) if anyone enters the area.
• Do not operate the product without the entire grass catcher, discharge chute, or other safety devices in place and functioning properly. Check frequently for signs of wear or deterioration and replace as needed.
• Wear appropriate personal protective equipment such as safety glasses, hearing protection, and footwear.

Operation

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

• For gasoline engine products: Only operate the engine in well ventilated areas. Exhaust gases contain carbon monoxide, a deadly poison.
• Only operate the product in daylight or in good artificial light.
• Avoid holes, ruts, bumps, rocks, or other hidden hazards. Uneven terrain could overturn the product, or cause the operator to lose their balance or footing.
• Do not put hands or feet near rotating parts or under the product. Keep clear of the discharge opening at all times.
• Do not direct discharge material toward anyone. Avoid discharging material against a wall or obstruction. Material may ricochet back toward the operator. Stop the blade(s) when crossing gravel surfaces.
• Do not leave a running product unattended. Always park on level ground, disengage the attachment, set parking brake, and stop the engine/motor.
• Do not mow in reverse unless it is absolutely necessary. Always look down and behind before and while reversing.

Children specific instructions
WARNING: Read the warning instructions that follow before you use the product.

• Tragic accidents can occur if the operator is not alert to the presence of children. Children are often attracted to the product and the mowing activity. Never assume that children will remain where you last saw them.
• Keep children out of the operating area and under the watchful care of a responsible adult other than the operator.

Slope specific instructions
WARNING: Read the warning instructions that follow before you use the product.
WARNING: Slopes are a major factor related to accidents. Operation on slopes requires extra caution.

• Travel in the manufacturer recommended direction on slopes. Use caution while operating near drop offs.
• Avoid mowing wet grass. Poor footing could cause a slip and fall accident.
• Do not operate product under any condition where traction, steering, or stability is in question. Tires could slide even if the wheels are stopped.
• Always keep the product in gear when going down slopes. Do not coast downhill.
• Avoid starting and stopping on slopes. Avoid making sudden changes in speed or direction. Make turns slowly and gradually.
• Use extra care while operating product with a grass catcher or other attachment(s). They can affect the stability of the product.

Fire and Fuel specific information (for gasoline engine products)
WARNING: Read the warning instructions that follow before you use the product.

• Extinguish all cigarettes, cigars, pipes and other sources of ignition.
• Use only an approved fuel container.
• Do not remove fuel cap or add fuel with the engine running or while hot.
• Do not refuel indoors or in enclosed spaces.
• Do not store the product or fuel container, or refuel, where there is an open flame, spark, or pilot light such as on a water heater or other appliance.
• If fuel is spilled, do not attempt to start the engine and avoid creating any source of ignition until fuel vapors have dissipated.
• To help prevent fires: keep product free of grass, leaves, or other debris build up; clean up oil or fuel spillage and remove any fuel soaked debris; allow product to cool before storing.
• Use extra care in handling gasoline and other fuels. They are flammable and vapors are explosive.

Hauling
WARNING: Read the warning instructions that follow before you use the product.

• Use full width ramps for loading and unloading a product for transport.

Service
WARNING: Read the warning instructions that follow before you use the product.

• Keep product in good working order. Replace worn or damaged parts.
• Use caution when servicing blades. Wrap the blade(s) or wear gloves. Replace damaged blades. Do not repair or alter blade(s).
• Products with hydraulic pumps, hoses, or motors; and/or diesel injection systems:
• WARNING: Fluid escaping under pressure may have sufficient force to penetrate skin and cause serious injury. If fluid is injected into the skin, seek immediate medical attention. Keep body and hands away from pin holes or nozzles that eject fluid under high pressure. If a leak occurs, have the product immediately serviced by a trained technician.
• If equipped, disconnect spark plug wire(s) and the negative battery cable before making any repairs.

General safety instructions

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

• This product is dangerous if used incorrectly or if you are not careful. Injury or death can occur if you do not obey the safety instructions.
• This product produces an electromagnetic field during operation. This field may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury we recommend persons with medical implants to consult their physician and the medical implant manufacturer before operating this product.
• Always be careful and use your common sense. If you are not sure how to operate the product in a special situation, stop and speak to your Husqvarna dealer before you continue.
• Keep in mind that the operator will be held responsible for accidents that involve other persons or their property.
• Keep the product clean. Make sure that you can clearly read signs and decals.
• Do not let a person use the product unless you make sure that they read and understand the contents of the operator’s manual.
• Do not let a child operate the product.
• Keep children away from the work area. A responsible adult must be there at all times.
• Do not let a person, without knowledge of the instructions, operate the product.
• Always monitor a person, with decreased physical capacity or mental capacity, that uses the product. A responsible adult must be there at all times.
• Do not use the product if you are tired, ill, or under the influence of alcohol, drugs or medicine. This has a negative effect on your vision, alertness, coordination and judgment.
• Do not use the product if it is defective.
• Do not change this product or use it if it is possible that it has been changed by others.
• Do not change the adjustment for the engine speed control.

Work area safety
WARNING: Read the warning instructions that follow before you use the product.

• Remove objects such as branches, twigs and stones from the work area before you use the product.
• Objects that hit against the cutting equipment can eject and cause damage to persons and objects. Keep bystanders and animals at a safe distance from the product.
• Never use the product in bad weather such as fog, rain, strong winds, intense cold and risk of lightning. To use the product in bad weather or in moist or wet locations is tiring. Bad weather can cause dangerous conditions, such as slippery surfaces.
• Look out for persons, objects and situations that can prevent safe operation of the product.
• Look out for obstacles, such as roots, stones, twigs, pits and ditches. Long grass can hide obstacles.
• To cut grass on slopes can be dangerous. Do not use the product on ground that slopes more than 15°.
• Operate the product across the face of slopes. Do not move up and down.
• Be careful when you go near hidden corners and objects that prevent a clear view.

Work safety
WARNING: Read the warning instructions that follow before you use the product.

• Use this product to cut grass lawns only. It is not permitted to use it for other tasks.

• Use personal protective equipment. Refer to Personal protective equipment on page 11.

• Make sure that you know how to stop the engine quickly in an emergency.

• Never start the engine in a closed space or near flammable material. The exhaust fumes from the engine are hot and can contain sparks which can start a fire.

• Do not operate the product unless the blade and all covers are attached correctly. An incorrectly attached blade can come loose and cause personal injury.

• Make sure that the blade does not hit objects such as stones and roots. This can do damage to the blade and bend the engine shaft. A bent axle causes heavy vibration and a very high risk that the blade becomes loose.

• If the blade hits an object or if vibrations occur, stop the product immediately. Disconnect the ignition cable from the spark plug. Examine the product
  for damages. Repair damages or let an authorised service agent do the repair.

• Never attach the engine brake handle permanently to the handle when the engine is started.

• Put the product on a stable, flat surface and start it. Make sure that the blade does not hit the ground or other objects.

• Always stay behind the product when you operate it.

• Let all the wheels stay on the ground and keep 2 hands on the handle when you operate the product. Keep your hands and feet away from the rotating blades.

• Do not tilt the product when the engine is started.

• Be careful when you pull the product rearward.

• Never lift up the product when the engine is started. If you must lift the product, first stop the engine and disconnect the ignition cable from the spark plug.

• Do not walk rearward when you operate the product.

• Stop the engine when you move across areas without grass, for example paths made of gravel, stone and asphalt.

• Do not run with the product when the engine is started. Always walk when you operate the product.

• Stop the engine before you change the cutting height. Never make adjustments with the engine started.

• Never let the product stay out of view with the engine started. Stop the engine and make sure that the cutting equipment does not rotate.

Safety instructions for operation

Personal protective equipment
WARNING: Read the warning instructions that follow before 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 hearing protection if the noise level is higher than 85 dB.
• Use heavy-duty slip-resistant boots or shoes. Do not use open shoes or go with bare feet.
• Use heavy, long pants.
• Use protective gloves when necessary, for example when you attach, examine or clean the cutting equipment.

Safety devices on the product
WARNING: Read the warning instructions that follow before you use the product.

• Do not use a product with defective safety devices.
• Do a check of the safety devices regularly. If the safety devices are defective, speak to your Husqvarna service agent.

To do a check of the cutting cover
The cutting cover decreases vibrations in the product and decreases the risk of injury from the blade.

• Examine the cutting cover to make sure that there are no damages such as cracks.

To do a check of the blade brake control and the start inhibitor
The blade brake control stops the blade only and not the engine. When the blade brake control is released, the blade stops.

1. Start the engine.
2. Push the blade brake control in the direction of the handlebar. The start inhibitor stops the movement.
3. Push the start inhibitor out.
4. Push the blade brake control in the direction of the handlebar. The blade starts to rotate.
5. Release the blade brake control. If the blade does not stop in 3 seconds, let an approved Husqvarna service agent adjust the blade brake. (Fig. 29)
6. Make sure that the start inhibitor goes back to its initial position.

Muffler
The muffler keeps the noise levels to a minimum and sends the exhaust fumes away from the operator.
Do not use the product if the muffler is missing or defective. A defective muffler increases the noise level and the risk of fire.

WARNING: The muffler becomes very hot during and after use and when the engine operates at idle speed. Be careful near flammable materials and/or fumes to prevent fire.

To do a check of the muffler
Examine the muffler regularly to make sure that it is attached correctly and not damaged.

Fuel safety
WARNING: Read the warning instructions that follow before you use the product.

• 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.
• 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 soap and water to remove the fuel.
• 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 a 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.
• Do not add fuel to the engine in an indoor area. Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.
• Tighten the fuel tank cap fully. If the fuel tank cap is not tightened, there is a risk of fire.
• Move the product a minimum of 3 m / 10 ft from the position where you filled the tank before a start.
• Do not fill the fuel tank fully. Heat causes the fuel to expand. Keep a space at the top of the fuel tank.

Safety instructions for maintenance
WARNING: Read the warning instructions that follow before you use the product.

• The exhaust fumes from the engine contain carbon monoxide, an odourless, poisonous and very dangerous gas. Do not start the engine indoors or in closed spaces.
• Before you do the maintenance on the product, stop the engine and remove the ignition cable from the spark plug.
• Use protective gloves when you do maintenance on the cutting equipment. The blade is very sharp and cuts can easily occur.
• 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 accessories that are approved by the manufacturer.
• If the maintenance is not done correctly and regularly, the risk of injury and damage to the product increases.
• Only do the maintenance as given in this owner’s manual. All other servicing must be done by an approved Husqvarna service agent.
• Let an approved Husqvarna service agent do servicing on the product regularly.
• Replace damaged, worn or broken parts.

Assembly

Introduction
WARNING: Before you assemble the product, you must read and understand the safety chapter.
WARNING: Remove the spark plug cable from the spark plug before you assemble the product.

To assemble the handle

1. Loosen the lower knobs on the left and the right side of the product. Make sure that the plastic washer is in the recess in the handle bracket. (Fig. 30)
2. Install the handle folded forward as shown in the illustration. (Fig. 31)
   • Make sure that the plastic washer is between the handle and the handle bracket.
   • Attach the handle to the handle bracket.
3. Lift the handle up. (Fig. 32)
4. Tighten the knobs fully. To adjust the handle height, refer to To adjust the handle height on page 12.
5. Put the wires in the cable brackets. Make sure that the wires are not twisted. Attach the cable brackets to the handle. (Fig. 33)
6. Use a cable tie to attach the cables to the handle bracket. (Fig. 34)

To adjust the handle height

1. Loosen the lower knobs.
2. Move the knobs to the lower end of the grooves on the left and the right side of the product. (Fig. 35)
3. Set the handle height in 1 of the 2 available positions.
4. Move the knobs up in the direction of the handlebar until they stop and you hear a click. (Fig. 36)
5. Tighten the knobs fully.

To set the product in transport position

1. Remove the grass catcher.
2. Loosen the lower knobs.
3. Move the knobs to the lower end of the grooves on the left and the right side of the product. (Fig. 35)
4. Fold the handle forward. (Fig. 37)

To set the product in operation position

1. Lift the handlebar up. (Fig. 32)
2. Move the knobs up in the direction of the handlebar until they stop and you hear a click. (Fig. 36)
3. Tighten the knobs fully.

To assemble the grass catcher

1. Attach the grass catcher frame to the grass bag with the rigid part of the bag on the bottom. Keep the handle of the frame on top of the grass bag. (Fig. 38)

2. Attach the bottom of the grass catcher frame to the bottom of the grass bag. (Fig. 39)

   • Push the grass catcher frame into the groove. Start at the right side as shown in the illustration and move gradually to the left.

3. If the grass catcher frame is not easy to attach,
   hit the grass catcher frame carefully with a rubber mallet. Hit the grass catcher frame between the reinforcements. (Fig. 40)

4. Attach the grass bag to the grass catcher frame with the clips. (Fig. 41)

5. Lift the rear cover.

6. Attach the grass catcher to the top edge of the chassis.

7. Put the lower part of the grass catcher into the grass discharge channel. (Fig. 42)

To assemble the mulch plug (accessory)

1. Lift up the rear cover and remove the grass catcher.
2. Put the mulch plug into the discharge channel. (Fig. 43)
3. Replace the blade with the mulch blade that is supplied with the mulch kit. Refer to To assemble the mulch plug (accessory) on page 13.

To cut grass without a grass catcher or mulch plug attached

1. Lift up the rear cover and remove the grass catcher.
2. If a mulch plug and a mulch blade are attached, remove them.
3. Close the rear cover before you operate the product.

When you operate the product, the cut grass discharges below the rear cover.

Operation

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

Husqvarna Connect
Husqvarna Connect is a free app for your mobile device. The Husqvarna Connect app gives extended functions for your Husqvarna product:

• Extended product information.
• Information about, and help with, product parts and servicing.

To start to use Husqvarna Connect

1. Download the Husqvarna Connect app on your mobile device.
2. Register in the Husqvarna Connect app.
3. Do the instruction steps in the Husqvarna Connect app to connect and register the product.
4. Before you operate the product

Before you operate the product

1. Read the operator’s manual carefully and make sure that you understand the instructions.
2. Examine the cutting equipment to make sure that it is correctly attached and adjusted. See To examine the cutting equipment on page 15.
3. Fill the fuel tank. See To fill fuel on page 13.
4. Fill the oil tank and do a check of the oil level. See To do a check of the oil level on page 16.

To fill fuel
If available, use low-emission/alkylate gasoline. If low-emission/alkylate gasoline is not available, use good quality unleaded gasoline or leaded gasoline with octane number not less than 90.

CAUTION: Do not use gasoline with an octane number less than 90 RON (87 AKI). This can cause damage to the product.

1. Open the fuel tank cap slowly to release the pressure.
2. Fill slowly with a fuel can. If you spill fuel, remove it with a cloth and let remaining fuel dry off.
3. Clean the area around the fuel tank cap.
4. Tighten the fuel tank cap fully. If the fuel tank cap is not tightened, there is a risk of fire.
5. Move the product a minimum of 3 m (10 ft) from the position where you filled the tank before a start.

To set the cutting height
The cutting height can be adjusted in 6 levels.

1. Push the cutting height control in the direction of the wheel and then rearward to increase the cutting height.
2. Push the cutting height control in the direction of the wheel and then forward to decrease the cutting height. (Fig. 44)

CAUTION: Do not set the cutting height too low. The blades can hit the ground if the surface of the lawn is not level.

To start the product

1. Make sure that the ignition cable is connected to the spark plug.
2. Stay behind the product.
3. Adjust the throttle control.
   • If the engine is cold, set the throttle control to the choke position. (Fig. 45)
   • If the engine is warm, do not set the throttle control to the choke position.
4. Hold the starter rope handle with your right hand.
5. Slowly pull out the starter rope until you feel some resistance.
6. Pull with force to start the engine.
7. Set the throttle control to full throttle.
8. Release the start inhibitor.
9. Push the blade brake control in the direction of the handlebar to start the blades.

To use the drive on the wheels

• Pull the drive bail in the direction of the handlebar.(Fig. 46)
• Adjust the drive speed with the speed control on the left side of the handle. Move the speed control forward to increase the speed and rearward to decrease the speed. (Fig. 47)
• Before you pull the product rearward, disengage the drive and push the product forward approximately 10 cm.
• Release the drive bail to disengage the drive, for example when you go near an obstacle.

To stop the product

• To stop the drive only, release the drive bail.
• To stop the engine, move the throttle control to the stop position.

To get a good result

• Always use a sharp blade. A blunt blade gives an irregular result and the cut surface of the grass becomes yellow. A sharp blade also uses less energy than a blunt blade.
• Do not cut more than ⅓ of the length of the grass. Cut first with the cutting height set high. Examine the result and lower the cutting height to an applicable level. If the grass is very long, drive slowly and cut 2 times if necessary.
• Cut in different directions each time to prevent stripes in the lawn.

Maintenance

Introduction
WARNING: 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.

Maintenance schedule
CAUTION: Make sure that the air filter is up and not against the ground when you tilt the product. Risk of engine damage.
The maintenance intervals are calculated from daily use of the product. The intervals change if the product is not used daily.
For maintenance identified with * refer to instructions in Safety devices on the product on page 11.

Replace the oil (the first time after 5 h of use, then after each 50 h of use)| | | X
Clean or replace the air filter| | | X
Examine the fuel system| | | X
Clean below the clutch cover| | | X

To do a general inspection
Make sure that all nuts and screws on the product are tightened correctly.

To clean the product

• Clean plastic parts with a clean and dry cloth.
• Do not use water to clean the product. Water can enter the battery or the motor and cause short circuit or damage to the product.
• Do not use a high pressure washer to clean the product.
• Do not flush water directly on the motor.
• Use a brush to remove leaves, grass and dirt.
• Remove the clutch cover, use a brush to remove grass below the clutch cover.

To clean the inner surface of the cutting cover

• Empty the fuel tank.

• Put the product on its side with the muffler down.
  CAUTION: If the product is put with the air filter down, the engine can become damaged.

• Hose down the inner surface of the cutting cover with water.

To examine the cutting equipment
WARNING: To prevent accidental start remove the ignition cable from the spark plug.
WARNING: Use protective gloves when you do maintenance on the cutting equipment. The blade is very sharp and cuts can easily occur.

1. Examine the cutting equipment for damage or cracks. Always replace a damaged cutting equipment.
2. Look at the blade to see if it is damaged or blunt.

Note: It is necessary to balance the blade after it is sharpened. Let a service center sharpen, replace and balance the blade. If you hit an obstacle that causes the product to stop, replace the damaged blade. Let the service center estimate if the blade can be sharpened or must be replaced.

To replace the blade

1. Lock the blade with a block of wood. (Fig. 48)

2. Remove the blade bolt.

3. Remove the blade.

4. Examine the blade support and blade bolt for damage.

5. Examine the engine shaft to make sure that it is not bent.

6. When you attach the new blade, point the angles of the blade in the direction of the cutting cover. (Fig. 49)

7. Make sure that the blade is aligned with the center of the engine shaft.

8. Lock the blade with a block of wood. (Fig. 50)

9. Attach the blade.

10. Tighten the bolts with a torque of 50 Nm. (Fig. 51)

11. Pull the blade around by hand and make sure that it turns freely.
    WARNING: Use heavy duty gloves. The blade is very sharp and injuries can easily occur.

12. Start the product to do a test of the blade. If the blade is not correctly attached, there is vibration in the product or the cutting result is unsatisfactory.

To do a check of the oil level
CAUTION: A too low oil level can do damage to the engine. Do a check of the oil level before you start the product.

1. Put the product on level ground.
2. Remove the oil tank cap with the attached dipstick.
3. Clean the oil from the dipstick.
4. Put the dipstick fully into the oil tank to give a correct picture of the oil level.
5. Remove the dipstick.
6. Examine the oil level on the dipstick.
7. If the oil level is low, fill with engine oil and do a check of the oil level again.

To fill and replace the engine oil
For information on how to fill and replace the engine oil, refer to the operator’s manual for the engine.

To clean and replace the air filter
For information on how to clean and replace the air filter, refer to the operator’s manual for the engine.

To examine the spark plug
CAUTION: Always use the recommended spark plug type. Incorrect spark plug type can cause damage to the product.

• Examine the spark plug if the engine is low on power, is not easy to start or does not operate correctly at idle speed.
• To decrease the risk of unwanted material on the spark plug electrodes, obey these instructions:
  • Make sure that the idle speed is correctly adjusted.
  • Make sure that the fuel mixture is correct.
  • Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that the electrode gap is correct, refer to Technical data on page 17. (Fig. 52)
• Replace the spark plug if it is necessary.

To examine the fuel system

• Examine the fuel tank cap and the seal for the fuel tank cap to make sure that there are no damages.
• Examine the fuel hose to make sure that there are no leaks. If the fuel hose is damaged, let a service agent replace it.

To adjust the speed control and throttle control
The speed control adjusts the drive speed. The throttle control adjusts the engine speed.

CAUTION: Do not adjust the speed control when the engine is on.

• To adjust the drive speed, turn the adjuster screw (A) to adjust the length of the cable sheath. Make the cable sheath shorter to increase the drive speed.
• If the choke position or stop position cannot be engaged, adjust the engine speed. Turn the adjuster screw (B). (Fig. 53)

Transportation, storage and disposal

Transportation and 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 tank before you put the product in storage for a long period of time. Discard the fuel at an applicable disposal location
• Safely attach the product during transportation to prevent damage and accidents.
• Keep the product in a locked area to prevent access for children or persons that are not approved.
• Keep the product in a dry and frost free area.

Disposal

• Obey the local recycling requirements and applicable regulations.
• Discard all chemicals, such as engine oil or fuel, at a service center or at an applicable disposal location.
• When the product is no longer in use, send it to a Husqvarna dealer or discard it at a recycling location.

Technical data

| W520
---|---
Engine
Brand| Kawasaki FJ180V
Displacement, cm3 / cu. in.| 179 / 10.9
Speed, rpm| 3600
Nominal engine output, kW / hp 1| 3.4 / 4.5
Ignition system 2
Spark plug| NGK BPR5ES
Electrode gap, mm / in| 0.7–0.8 / 0.028-0.032
Fuel and lubrication system
Fuel, unleaded, minimum octane number, RON / AKI| 90 / 87
Fuel tank capacity, l / gal| 1.8 / 0.48
Oil tank capacity, l / q| 0.65 / 0.69
Engine oil 3| SAE 30/SAE 10W-30
Weight
With empty tanks, kg / lb| 51 / 112
Cutting equipment
Cutting height, mm / in| 37–114 / 1.45-4.5
Cutting width, mm / in| 510 / 20
Blade| Collect
Article number| 5821494-10
Grass catcher capacity, l / cu. ft| 65 / 2.3
Drive
Speed, km/h / mph| 3.5–6 / 2.2-3.7

1. The power rating of the engine indicated is the average net output (at specified rpm) of a typical production engine for the engine model measured to SAE standard J1349/ISO1585. Mass production engines may differ from this value. Actual power output for the engine installed on the final product will depend on the operating speed, environmental conditions and other values.
2. This spark ignition system complies with the Canadian ICES-002 standard.
3. Use engine oil of quality SF, SG, SH, SJ or higher. See the viscosity chart in the engine manufacturer’s manual and select the best viscosity based on the expected outside temperature.

References

• Husqvarna Forest & Garden

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>