Husqvarna 6521CM User Manual

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6521CM

Owner’s Manual / 96133000401 / 2008-01

532 41 87-01 01.02.08 BY Printed in U.S.A.

Questions and Answers:

A
Alex BeckJul 30, 2025
Why won't my Husqvarna Lawn Mower start?
- K
  kirkthompsonJul 30, 2025
  Your Husqvarna Lawn Mower might not start due to several reasons: * A dirty air filter: Clean or replace it. * Lack of fuel: Refill the fuel tank. * Stale or water-contaminated fuel: Empty the tank and refill with fresh gasoline. * A disconnected spark plug wire: Connect the wire to the plug. * A bad spark plug: Replace it. * A loose or broken blade adapter: Tighten the blade bolt or replace the adapter. * The control bar is released: Depress the control bar to the handle. * A defective control bar: Replace it. * The fuel valve lever is in the OFF position (if equipped): Turn it to the ON position. * A weak battery (if equipped): Charge the battery. * A disconnected battery connector (if equipped): Connect the battery to the engine.
R
Robin VelezAug 5, 2025
What to do if my Husqvarna 6521CM Lawn Mower gives a poor, uneven cut?
- B
  billybellAug 5, 2025
  If your Husqvarna Lawn Mower is providing an uneven cut, consider these potential causes: * A worn, bent, or loose blade: Replace the blade and tighten the blade bolt. * Uneven wheel heights: Ensure all wheels are set at the same height. * Buildup of grass, leaves, and trash under the mower: Clean the underside of the mower housing.
N
Nicole WilsonAug 11, 2025
Why is my Husqvarna 6521CM losing power while cutting?
- W
  westwilliamAug 11, 2025
  A loss of power in your Husqvarna Lawn Mower can occur for several reasons: * The rear of the mower housing or blade may be dragging in heavy grass: Raise the cutting height. * You may be cutting too much grass at once: Raise the cutting height. * The air filter could be dirty: Clean or replace the air filter. * There might be a buildup of grass, leaves, and trash under the mower: Clean the underside of the mower housing. * There may be too much oil in the engine: Check the oil level. * You may be walking too fast: Cut at a slower pace.
S
Stephanie WyattAug 17, 2025
Why is the grass catcher not filling up on my Husqvarna Lawn Mower?
- K
  kathryn24Aug 17, 2025
  If the grass catcher on your Husqvarna Lawn Mower isn't filling properly, check these: * The cutting height may be too low: Raise the cutting height. * The lift on the blade may be worn off: Replace the blade. * The catcher may not be venting air properly: Clean the grass catcher.
E
Erika HayesAug 23, 2025
Why is my Husqvarna 6521CM Lawn Mower so hard to push?
- I
  imillerAug 23, 2025
  If your Husqvarna Lawn Mower is hard to push, consider these factors: * The grass may be too high or the wheel height too low: Raise the cutting height. * The rear of the mower housing or cutting blade may be dragging in heavy grass: Raise the rear of the lawn mower housing one setting higher. * The grass catcher may be too full: Empty the grass catcher. * The handle height position may not be right for you: Adjust the handle height to suit.

Husqvarna 6521CM Specifications

General

Brand	Husqvarna
Model	6521CM
Category	Lawn Mower
Language	English

Summary

Safety Rules for Walk-Behind Mowers

General Operation Safety

Follows important safety precautions for general mower operation.

Slope and Children Safety

Highlights safety practices for mowing on slopes and around children.

Safe Gasoline Handling

Provides crucial safety instructions for handling gasoline.

General Service Safety

Lawn Mower Assembly

Mower Carton Removal

Handle Setup and Adjustment

Lawn Mower Operation

Know Your Lawn Mower and Controls

Familiarization with mower parts, symbols, and operator controls.

Adjusting Cutting Height

Instructions on how to adjust the mower's cutting height.

Converting Mower Functions

Adding Engine Oil

Procedure for adding the correct amount of oil before starting.

Adding Gasoline and Starting Engine

Instructions for fueling and starting the mower engine.

Mowing and Mulching Tips

Maintenance Schedule and Procedures

Maintenance Schedule Overview

General Recommendations and Lubrication

Tire and Blade Maintenance

Engine and Filter Maintenance

Mower Cleaning

Troubleshooting Common Issues

Engine Starting and Power Problems

Diagnosing and correcting issues with engine starting and power loss.

Cut Quality and Vibration Issues

Resolving problems related to uneven cuts and excessive vibration.

Operational and Handling Problems

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