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Lawn-Boy S21ZPR lawn mower

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.

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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 Pulley for Lawn-Boy S21ZPR - Part 612950

    Starter group diagram

    Pulley

    Part #612950

    Replaced by #612950

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    Manufacturer substitution
    This part replaces 612950. Substitute parts can look different from the original.
    In Stock
    $100.65
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  • Toro Choke Kit for Lawn-Boy S21ZPR - Part 683781

    #NI

    All parts diagram

    Choke Kit

    Part #683781

    Replaced by #683781

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    Manufacturer substitution
    This part replaces 683781. Substitute parts can look different from the original.
    In Stock
    $127.44
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  • Toro Tie Strap for Lawn-Boy S21ZPR - Part 614249

    Tie Strap

    Part #614249

    Replaced by #614249

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    Manufacturer substitution
    This part replaces 614249. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
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    Qty
    Plus Item
  • Toro Adjustment Collar for Lawn-Boy S21ZPR - Part 612757

    Carburetor group diagram

    Adjustment Collar

    Part #612757

    Replaced by #612757

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    Manufacturer substitution
    This part replaces 612757. Substitute parts can look different from the original.
    In Stock
    $31.81
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  • Toro Control Cable for Lawn-Boy S21ZPR - Part 683943

    Handle group diagram

    Control Cable

    Part #683943

    Replaced by #683943

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    Manufacturer substitution
    This part replaces 683943. Substitute parts can look different from the original.
    In Stock
    $262.37
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  • Toro Adapter for Lawn-Boy S21ZPR - Part 684727-03

    Rear grass catcher group diagram

    Adapter A'y

    Part #684166

    Replaced by #684727-03

    Info Icon
    Manufacturer substitution
    This part replaces 684166. Substitute parts can look different from the original.
    In Stock
    $209.36
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  • Toro Lawn-boy Retainer for Lawn-Boy S21ZPR - Part 610165

    Carburetor group diagram

    Retainer

    Part #610165

    Replaced by #610165

    Info Icon
    Manufacturer substitution
    This part replaces 610165. Substitute parts can look different from the original.
    In Stock
    $32.23
    Minus Item
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    Plus Item
  • Toro Lawn Mower Grass Bag for Lawn-Boy S21ZPR - Part 100-6362

    Bag Assembly

    Part #684168

    Replaced by #100-6362

    Info Icon
    Manufacturer substitution
    This part replaces 684168. Substitute parts can look different from the original.
    In Stock
    $315.21
    Minus Item
    Qty
    Plus Item
  • Toro Snowblower Screw for Lawn-Boy S21ZPR - Part 3230-22

    Handle group diagram

    Carriage Bolt

    Part #800358

    Replaced by #3230-22

    Info Icon
    Manufacturer substitution
    This part replaces 800358. Substitute parts can look different from the original.
    In Stock
    $27.95
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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…

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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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