Husqvarna 650 Series Owner's Manual
Husqvarna 650 Series Owner's Manual

Husqvarna 650 Series Owner's Manual

Rotary lawn mower
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Owner's Manual
ROTARY LAWN MOWER
650 Series Briggs & Stratton Engine
Power-Propelled
21" Multi-Cut
Model Number 6521RS (65021RS)
Product Number 961 45 00-05
CAUTION:
Read and follow all
Safety Rules and In struc tions
before operating this equipment

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sonya
July 7, 2025

what kind of gas should be used

Summary of Contents for Husqvarna 650 Series

  • Page 1 Owner’s Manual ROTARY LAWN MOWER 650 Series Briggs & Stratton Engine Power-Propelled 21" Multi-Cut Model Number 6521RS (65021RS) Product Number 961 45 00-05 CAUTION: Read and follow all Safety Rules and In struc tions before operating this equipment...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS Safe ty Rules ..........2-3 Maintenance ........12-15 Warranty ...........4 Ser vice and Ad just ments....15-16 Prod uct Spec i fi ca tions ......5 Stor age ..........16-17 Assembly / Pre-Operation ......6 Trou ble shoot ing .........17-18 Op er a tion..........7-11 Re pair Parts........36-39 Maintenance Sched ule ......12 SAFETY RULES...
  • Page 3: Safe Handling Of Gasoline

    Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffl er is available through your nearest Husqvarna or other authorized service center (See the REPAIR PARTS section of this manual).
  • Page 4: Warranty

    Warranty Registration Card is properly fi lters, guide bars, lubricants, rewind springs, saw fi lled out and mailed to Husqvarna Forest & Garden chain, spark plugs, starter ropes and tines; Company. This card should be mailed within ten (10) (2) Natural discoloration of material due to ultraviolet days from the date of purchase in order to confi...
  • Page 5: Product Specifications

    ACCESSORIES These accessories were available when this lawn mower was produced. They are not shipped with your mower. They are also available at most Husqvarna retailers and service centers. Some of these accessories may not apply to your lawn mower.
  • Page 6: Assembly / Pre-Operation

    ASSEMBLY / PRE-OPERATION Read these instructions and this man u al in its entirety before you attempt to assemble or operate your new lawn mower. IMPORTANT: This lawn mower is shipped WITHOUT OIL OR GASOLINE in the engine. Your new lawn mower has been as sem bled at the factory with the ex cep tion of those parts left unassembled for shipping purposes.
  • Page 7: Know Your Lawn Mower

    OPERATION KNOW YOUR LAWN MOWER READ THIS OWNER'S MANUAL AND ALL SAFETY RULES BEFORE OP ER AT ING YOUR LAWN MOWER. Compare the illustrations with your lawn mower to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference.
  • Page 8 DRIVE CONTROL ADJUSTMENT The operation of any lawn Over time, the drive control system may mower can result in foreign become “loose”, resulting in decreased objects thrown into the eyes, speed. There is a turnbuckle on the drive which can result in severe control housing to increase tension on the eye damage.
  • Page 9: To Empty Grass Catch Er

    CAUTION: Do not run your lawn mower with out mulcher plate or plug, clip- ping de fl ec tor or approved grass catch er in place. Never at tempt to op er ate the lawn mower with the rear door re moved or propped open.
  • Page 10: To Stop Engine

    SIMPLE STEPS TO REMEMBER WHEN CAUTION: Alcohol blended fuels CONVERTING YOUR LAWN MOWER (called gasohol or using ethanol or metha- nol) can attract moisture which leads to FOR MULCHING - separation and for ma tion of acids during 1. Rear mulcher plug installed. storage.
  • Page 11: Mowing Tips

    MOWING TIPS MULCHING MOWING TIPS CAUTION: Do not use de-thatcher IMPORTANT: For best performance, blade attachments on your mower. Such keep mower housing free of built-up attachments are hazardous, will damage grass and trash. See “CLEANING” in the your mower and could void your warranty. Maintenance section of this manual.
  • Page 12: General Recommendations

    MAINTENANCE BEFORE AFTER EVERY EVERY EVERY BEFORE EACH EACH 25 HOURS STORAGE HOURS OR SEASON HOURS Check for Loose Fasteners Clean / Inspect Grass Catcher * Check Tires Check Drive Wheels *** Clean Lawn Mower **** Clean under Drive Cover *** Check Drive Belt / Pulleys *** Check / Sharpen / Replace Blade Lubrication...
  • Page 13: Lawn Mower

    LAWN MOWER IMPORTANT: Blade bolt is heat treated. If bolt needs replacing, replace only with Always observe safety rules when per- approved bolt shown in the Repair Parts form ing any main te nance. section of this manual. TIRES Blade adapter Crankshaft •...
  • Page 14: Engine Lubrication

    ENGINE 7. Continue adding small amounts of oil, rechecking the dipstick until oil level LUBRICATION settles at FULL. DO NOT overfi ll, or Use only high quality detergent oil rated engine will smoke heavily from the with API service classifi cation SG–SL. Se- muffl...
  • Page 15: Service And Adjustments

    CLEANING • Keep fi nished surfaces and wheels free of all gasoline, oil, etc. IMPORTANT: For best performance, • We do not recommend using a garden keep mower housing free of built-grass hose to clean lawn mower unless the and trash. Clean the underside of your elec tri cal system, muffl...
  • Page 16: Storage

    Husqvarna three height adjustment holes. or other qualifi ed service cen ter for repair and ad just ment.
  • Page 17: Engine Fuel System

    Add fl ame or spark. Allow the engine to cool before storing in any enclosure. TROUBLESHOOTING - See appropriate section in manual unless directed to a Husqvarna Parts & Repair Center. PROBLEM CAUSE CORRECTION Does not start 1.
  • Page 18: Trou Ble Shoot Ing

    TROUBLESHOOTING - See appropriate section in manual unless directed to a Husqvarna Parts & Repair Center. PROBLEM CAUSE CORRECTION Does not start 9. Control bar defective. 9. Replace control bar. (continued) 10. Fuel valve lever (if so 10. Turn fuel valve lever equipped) in OFF position.
  • Page 19 ROTARY LAWN MOWER - - MODEL NUMBER 6521RS (96145000500) (PRODUCT NUMBER 961 45 00-05)
  • Page 20 ROTARY LAWN MOWER - - MODEL NUMBER 6521RS (96145000500) (PRODUCT NUMBER 961 45 00-05) PART PART DESCRIPTION DESCRIPTION 532 19 99-82 Handle, Upper (Includes Foam Grip) 27 532 19 28-76 Skirt, Rear 532 19 72-02 Handle, Lower 28 532 08 86-52 Screw, Hinge 1/4-20 x 1.25 532 40 54-16 Spring, Rear Door, RH...
  • Page 21 ROTARY LAWN MOWER - - MODEL NUMBER 6521RS (96145000500) (PRODUCT NUMBER 961 45 00-05)
  • Page 22 ROTARY LAWN MOWER - - MODEL NUMBER 6521RS (96145000500) (PRODUCT NUMBER 961 45 00-05) PART PART DESCRIPTION DESCRIPTION 532 40 73-44 Drive Control Assembly (Includes Cable) 532 41 31-43 Wheel & Tire Assembly, Rear 532 41 35-42 Cover, Top, Drive Control 532 40 91-48 Nut, Hex, Flangelock 3/8-16 532 40 62-62...
  • Page 24 532 41 37-72 Rev. 1 03.27.07 BY Printed in U.S.A.

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