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Lawn-Boy S21ZPR lawn mower Parts

Here are the diagrams and repair parts for Lawn-Boy S21ZPR lawn mower, as well as links to manuals and error code tables, if available.

Lawn-Boy S21ZPR lawn mower
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Browse Parts for S21ZPR Walk-Behind Mowers

  • Toro Snap Ring for Lawn-Boy S21ZPR - Part 303712

    Engine group diagram

    Retaining Ring

    Part #303712

    Replaced by #303712

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    Manufacturer substitution
    This part replaces 303712. Substitute parts can look different from the original.
    In Stock
    $30.10
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  • Toro Tie Strap for Lawn-Boy S21ZPR - Part 92-1039

    Rear grass catcher group diagram

    Lock Strap

    Part #612740

    Replaced by #92-1039

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    Manufacturer substitution
    This part replaces 612740. Substitute parts can look different from the original.
    In Stock
    $39.11
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  • Toro Collar Plate for Lawn-Boy S21ZPR - Part 677525

    Housing and shroud group diagram

    Collar Plate

    Part #677525

    Replaced by #677525

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    Manufacturer substitution
    This part replaces 677525. Substitute parts can look different from the original.
    In Stock
    $127.44
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  • Toro Lawn Mower Grass Bag for Lawn-Boy S21ZPR - Part 100-6362

    Bag Assembly

    Part #684168

    Replaced by #100-6362

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    Manufacturer substitution
    This part replaces 684168. Substitute parts can look different from the original.
    In Stock
    $315.21
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  • Toro Screw for Lawn-Boy S21ZPR - Part 614343

    Engine group diagram

    Screw

    Part #307028

    Replaced by #614343

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    Manufacturer substitution
    This part replaces 307028. Substitute parts can look different from the original.
    In Stock
    $30.10
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  • Toro Case Control for Lawn-Boy S21ZPR - Part 611777

    Handle group diagram

    Case Control

    Part #611777

    Replaced by #611777

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    Manufacturer substitution
    This part replaces 611777. Substitute parts can look different from the original.
    In Stock
    $107.09
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  • Toro Screw for Lawn-Boy S21ZPR - Part 607188

    Housing and shroud group diagram

    Screw

    Part #607188

    Replaced by #607188

    Info Icon
    Manufacturer substitution
    This part replaces 607188. Substitute parts can look different from the original.
    In Stock
    $30.95
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  • Toro Lawn & Garden Equipment Wheel for Lawn-Boy S21ZPR - Part 105-8618

    Housing and shroud group diagram

    Wheel Tire

    Part #684135

    Replaced by #105-8618

    Info Icon
    Manufacturer substitution
    This part replaces 684135. Substitute parts can look different from the original.
    In Stock
    $86.00
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  • Toro Lawn-boy Bearing for Lawn-Boy S21ZPR - Part 681831

    Engine group diagram

    Bearing

    Part #681831

    Replaced by #681831

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    Manufacturer substitution
    This part replaces 681831. Substitute parts can look different from the original.
    In Stock
    $94.19
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  • Toro Switch Kit for Lawn-Boy S21ZPR - Part 93-4307

    Engine group diagram

    Switch Kit

    Part #683968

    Replaced by #93-4307

    Info Icon
    Manufacturer substitution
    This part replaces 683968. Substitute parts can look different from the original.
    In Stock
    $123.58
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Most common symptoms to help you fix your walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Read more

Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Read more

Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower front deck tray

How to replace a lawn mower front deck tray

Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…

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Repair time and Difficulty

 60 minutes or less
How to replace a lawn mower transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…

Read more

Repair time and Difficulty

 60 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more

Repair time and Difficulty

 45 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

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Top 10 electric lawn and garden tools

Top 10 electric lawn and garden tools

Learn about the top 10 must-have electric lawn & garden tools for 2023…

Read more
Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…

Read more

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