Husqvarna 6521CM owner manual Lawn Mower, Engine, Tires, Blade Care, Grass Catcher

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MAINTENANCE

LAWN MOWER

Always observe safety rules when performing maintenance.

TIRES

•Keep tires free of gasoline, oil, or insect control chem- icals which can harm rubber.

•Avoid stumps, stones, deep ruts, sharp objects and other hazards that may cause tire damage.

BLADE CARE

For best results, mower blade must be kept sharp. Replace bent or damaged blades.

CAUTION: Useonlyareplacementblade approved by the manufacturer of your mower. Using a blade not approved by the manufacturer of your mower is hazardous, could damage your mower and void your warranty.

TO REMOVE BLADE (See Fig. 10)

1.Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with plug.

2.Turn lawn mower on its side. Make sure air fi lter and carburetor are up.

3.Use a wood block between blade and mower housing to prevent blade from turning when removing blade bolt.

NOTE: Protect your hands with gloves and/or wrap blade with heavy cloth.

4.Remove blade bolt by turning counter-clockwise.

5.Removebladeandattachinghardware(bolt,lockwasher and hardened washer).

NOTE: Remove the blade adapter and check the key inside hub of blade adapter. The key must be in good condition to work properly. Replace adapter if damaged.

TO REPLACE BLADE (See Fig. 10)

1.Position the blade adapter on the engine crankshaft. Be sure key in adapter and crankshaft keyway are aligned.

2.Position the blade on the blade adapter aligning the two (2) holes in the blade with the raised lugs on the adapter.

3.Be sure the trailing edge of blade (opposite sharp edge) is up toward the engine.

4.Install the blade bolt with the lock washer and hardened washer into blade adapter and crankshaft.

5.Use block of wood between blade and lawn mower housing and tighten the blade bolt, turning clockwise.

•The recommended tightening torque is 35-40 ft. lbs.

IMPORTANT: BLADE BOLT IS HEAT TREATED. IFBOLT NEEDS REPLACING, REPLACE ONLYWITHAPPROVED BOLT SHOWN IN THE REPAIR PARTS SECTION OF THIS MANUAL.

TO SHARPEN BLADE

NOTE: We do not recommend sharpening blade - but if you do, be sure the blade is balanced. An unbalanced blade will cause eventual damage to lawn mower or engine.

•The blade can be sharpened with a fi le or on a grinding wheel. Do not attempt to sharpen while on the mower.

•To check blade balance, drive a nail into a beam or wall. Leave about one inch of the straight nail exposed. Place center hole of blade over the head of the nail. If blade is balanced, it should remain in a horizontal position. If either end of the blade moves downward, sharpen the heavy end until the blade is balanced.

BLADE ADAPTER

KEY

CRANKSHAFT

 

 

KEYWAY

BLADE

 

 

LOCK

 

 

WASHER

 

 

BLADE

BOLT

HARDENED

TRAILING EDGE

CRANKSHAFT

WASHER

FIG. 10

GRASS CATCHER

•The grass catcher may be hosed with water, but must be dry when used.

•Check your grass catcher often for damage or dete- rioration. Through normal use it will wear. If catcher needs replacing, replace only with approved replace- ment catcher shown in the Repair Parts section of this manual. Give the mower model number when ordering.

ENGINE

Maintenance, repair, or replacement of the emission control devices and systems, which are being done at the customers expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be per- formedbyanauthorizedenginemanufacturer’sserviceoutlet.

LUBRICATION

Use only high quality detergent oil rated with API service classifi cation SG–SL. Select the oil's SAE viscosity grade according to your expected operating temperature.

SAE VISCOSITY GRADES

 

 

 

 

 

 

 

 

 

 

SAE 30

 

 

 

 

 

 

5W-30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

-20

0

 

 

30 32 40

 

60

80

100

C

-30

-20

-10

0

10

20

30

40

TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

NOTE: Multi-viscosity oils (5W30, 10W30 etc.) improve starting in cold weather, and you should check your engine oil level frequently to avoid possible engine damage from running low on oil.

Change the oil after every 25 hours of operation or at least once a year if the lawn mower is not used for 25 hours in one year.

Check the crankcase oil level before starting the engine and after each fi ve (5) hours of continuous use. Tighten oil plug securely each time you check the oil level.

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Contents 6521CM General Operation Safe Operation Practices for Walk-Behind MowersII. Slope Operation III. ChildrenTable of Contents To Install Attachments AssemblyHOW to SET UP Your Lawn Mower To Remove Lawn Mower from CartonOperation Meets Cpsc Safety RequirementsKnow Your Lawn Mower Engine Speed HOW to USE Your Lawn MowerTo Adjust Cutting Height See Fig Engine Zone ControlTo Empty Grass Catcher See Fig Before Starting EngineADD OIL See Fig Mowing Tips To Stop EngineTo Start Engine Mulching Mowing TipsGeneral Recommendations MaintenanceLubrication Chart Before Each USETires Lawn MowerEngine Blade CareAIR Filter See Fig CleaningTo Change Engine OIL See Fig MufflerTo Adjust Handle See Figs thru Service and AdjustmentsTo Adjust Cutting Height Rear DeflectorFuel System StorageOther Engine OILTroubleshooting Points Problem Cause CorrectionService Notes Page KEY Part Description Warranty Statement

6521CM specifications

The Husqvarna 6521CM is a cutting-edge walk-behind lawn mower that blends power, functionality, and ease of operation, making it a suitable choice for homeowners and professionals alike. Known for its robust construction and innovative features, this mower is designed to tackle various lawn care needs, ensuring a pristine finish every time.

One of the primary features of the Husqvarna 6521CM is its powerful Honda engine, which delivers reliable performance and efficiency. This engine provides ample horsepower to handle tall grass and tough terrains, ensuring that mowing takes less time and effort. The self-propelled capabilities of the mower allow users to navigate hilly or uneven landscapes with ease, significantly reducing operator fatigue during longer mowing sessions.

The Husqvarna 6521CM is equipped with a practical 21-inch cutting deck, which strikes an ideal balance between maneuverability and cutting efficiency. The cutting deck is made of durable materials, ensuring resilience against wear and tear over time. Additionally, the mower features a 3-in-1 cutting system that allows for mulching, bagging, and side discharge, giving users the flexibility to choose their preferred grass handling option according to their lawn care needs.

Another notable technology in the Husqvarna 6521CM is its easy-starting mechanism, which eliminates the hassle often associated with traditional pull-start engines. This feature ensures that users can quickly get to work without the frustration of struggling to start the mower. The adjustable cutting height feature further enhances user convenience, offering multiple positions to suit various grass types and lengths, thus enabling precise control over the mowing height.

The ergonomic handle design of the Husqvarna 6521CM contributes to overall user comfort. The handle is adjustable, allowing for personalization based on the user’s height and preference, and the soft grip makes extended use more enjoyable. Additionally, the folding handle design facilitates easy storage, making it a space-saving option for homeowners with limited garage space.

Overall, the Husqvarna 6521CM stands out with its combination of a powerful engine, versatile cutting options, user-friendly features, and sturdy construction. This lawn mower not only enhances mowing efficiency but also allows users to achieve a beautiful lawn with minimal effort. Whether for routine lawn maintenance or tackling challenging patches, the Husqvarna 6521CM proves to be a dependable ally in lawn care.
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