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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

  • Wash Flat.28 for Western Tool 421 - Part 711663MA

    Auger housing assembly diagram

    Washer

    Part #90008492

    Replaced by #711663MA

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    Manufacturer substitution
    This part replaces 90008492. Substitute parts can look different from the original.
    This item is not returnable
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    $6.63
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  • Washer Flat for Western Tool 421 - Part 53748MA

    Gear box diagram

    Race

    Part #90053748

    Replaced by #53748MA

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    This part replaces 90053748. Substitute parts can look different from the original.
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  • Wingknob.31- for Western Tool 421 - Part 1501260MA

    Auger housing assembly diagram

    Knob

    Part #90071041

    Replaced by #1501260MA

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    This part replaces 90071041. Substitute parts can look different from the original.
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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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    This part replaces 90000896. Substitute parts can look different from the original.
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    $49.04
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  • Flat Washer for Western Tool 421 - Part STD551025

    Motor mount assembly diagram

    Washer

    Part #90071067

    Replaced by #STD551025

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    This part replaces 90071067. Substitute parts can look different from the original.
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    $36.61
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  • Brng Slev 1x for Western Tool 421 - Part 53743MA

    Gear box diagram

    Bearing

    Part #90053743

    Replaced by #53743MA

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    This part replaces 90053743. Substitute parts can look different from the original.
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    $19.86
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  • Seal Oil Cr for Western Tool 421 - Part 780151MA

    Gear box diagram

    Seal

    Part #90053744

    Replaced by #780151MA

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    This part replaces 90053744. Substitute parts can look different from the original.
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  • Bearing & Re for Western Tool 421 - Part 761508MA

    Auger housing assembly diagram

    Bearing

    Part #90085087

    Replaced by #761508MA

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    Manufacturer substitution
    This part replaces 90085087. Substitute parts can look different from the original.
    In Stock
    $93.07
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  • Wormgear 1.7 for Western Tool 421 - Part 53732MA

    Gear box diagram

    Worm

    Part #90053732

    Replaced by #53732MA

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    This part replaces 90053732. Substitute parts can look different from the original.
    In Stock
    $74.96
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  • Nut Push On for Western Tool 421 - Part 3535MA

    Upper handle assembly diagram

    Retainer

    Part #90003535

    Replaced by #3535MA

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    This part replaces 90003535. Substitute parts can look different from the original.
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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…

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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, …

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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…

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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.…

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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.…

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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.

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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…

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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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