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Western Tool 421 snow blower

Western Tool 421 snow blower Parts

Here are the diagrams and repair parts for Western Tool 421 snow blower, as well as links to manuals and error code tables, if available.

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Browse Parts for 421 Snowblowers

  • Square Key- for Western Tool 421 - Part 21553MA

    Key

    Part #90020556

    Replaced by #21553MA

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    Manufacturer substitution
    This part replaces 90020556. Substitute parts can look different from the original.
    In Stock
    $9.54
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  • Case Gear Rh for Western Tool 421 - Part 896MA

    Gear box diagram

    Housing

    Part #90000896

    Replaced by #896MA

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    Manufacturer substitution
    This part replaces 90000896. Substitute parts can look different from the original.
    In Stock
    $49.04
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  • Nut for Western Tool 421 - Part 703123

    Gear box diagram

    Lock Nut

    Part #90071100

    Replaced by #703123

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    Manufacturer substitution
    This part replaces 90071100. Substitute parts can look different from the original.
    In Stock
    $29.66
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  • Gear,worm for Western Tool 421 - Part 1752500YP

    Gear box diagram

    Worm Gear

    Part #90053730

    Replaced by #1752500YP

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    Manufacturer substitution
    This part replaces 90053730. Substitute parts can look different from the original.
    In Stock
    $108.28
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  • Plug for Western Tool 421 - Part 703122

    Gear box diagram

    Pipe Plug

    Part #90053749

    Replaced by #703122

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    Manufacturer substitution
    This part replaces 90053749. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $6.86
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  • Gearbox Case for Western Tool 421 - Part 780390MA

    Gear box diagram

    Housing

    Part #90000899

    Replaced by #780390MA

    Info Icon
    Manufacturer substitution
    This part replaces 90000899. Substitute parts can look different from the original.
    In Stock
    $27.73
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  • Key,woodr for Western Tool 421 - Part 704280

    Gear box diagram

    Woodruff Key

    Part #90073905

    Replaced by #704280

    Info Icon
    Manufacturer substitution
    This part replaces 90073905. Substitute parts can look different from the original.
    In Stock
    $9.54
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  • Nut #8-32 Ny for Western Tool 421 - Part 334538MA

    Auger housing assembly diagram

    Lock Nut

    Part #90071058

    Replaced by #334538MA

    Info Icon
    Manufacturer substitution
    This part replaces 90071058. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $6.86
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    Qty
    Plus Item
  • Screw 5/16-1 for Western Tool 421 - Part 577400MA

    Auger housing assembly diagram

    Screw

    Part #90000130

    Replaced by #577400MA

    Info Icon
    Manufacturer substitution
    This part replaces 90000130. Substitute parts can look different from the original.
    In Stock
    $9.54
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    Qty
    Plus Item
  • Washer Flat for Western Tool 421 - Part 50677MA

    Motor mount assembly diagram

    Washer

    Part #90050677

    Replaced by #50677MA

    Info Icon
    Manufacturer substitution
    This part replaces 90050677. Substitute parts can look different from the original.
    In Stock
    $12.31
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Most common symptoms to help you fix your snowblowers

Choose a symptom to see related snowblower repairs.

View all

Why won't my snowblower throw snow far enough?

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Read more

How do I tune up my snowblower?

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Read more

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

Read more

Why won't my snowblower clear snow well?

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Read more

Why doesn't my snowblower auger turn?

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

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Why won't my snowblower chute turn?

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

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Why doesn't my snowblower self propel?

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

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Why does my snowblower engine run rough?

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Read more

Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

View all
How to adjust snowblower skid shoes

How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high.…

Read more

Repair time and Difficulty

 15 minutes or less
How to rebuild a snowblower carburetor

How to rebuild a snowblower carburetor

Rebuild the carburetor on your snowblower if the engine isn't getting fuel.…

Read more

Repair time and Difficulty

 45 minutes or less
How to replace a snowblower 4-way chute control assembly

How to replace a snowblower 4-way chute control assembly

Replace the 4-way chute control assembly on your snowblower if it’s damaged.…

Read more

Repair time and Difficulty

 30 minutes or less

Effective articles & videos to help repair your snowblowers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

View all
How to find the age of your Craftsman snowblower

How to find the age of your Craftsman snowblower

If you're looking for the age of you Craftsman snowblower, our guide will help.…

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How to adjust the snowblower drive control cable video

How to adjust the snowblower drive control cable video

Proper drive control cable tension is key to smooth snowblower operation, and you can learn how to test and adjust it yo…

Read more
How to lubricate a snowblower drive hex shaft video

How to lubricate a snowblower drive hex shaft video

Avoid costly snowblower repairs this season. Watch how to lubricate the drive hex shaft to prevent friction, improve tra…

Read more

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