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Model # 421 Official Western Tool snow blower
Here are the diagrams and repair parts for Official Western Tool 421 snow blower, as well as links to manuals and error code tables, if available.
By Schematic
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421 Snowblowers
#13
Auger housing assembly diagram
Knob
Part #90071041
Replaced by #1501260MA
?
Manufacturer substitution
This part replaces 90071041. Substitute parts can look different from the original.
$10.93 |
15% OFF Phone Price : $12.93
In Stock
#17
Upper handle assembly diagram
Lock nut
Part #90071035
Replaced by #703251
?
Manufacturer substitution
This part replaces 90071035. Substitute parts can look different from the original.
$8.07 |
11% OFF Phone Price : $9.07
In Stock
#7
Gear box diagram
Worm gear
Part #90053730
Replaced by #1752500YP
?
Manufacturer substitution
This part replaces 90053730. Substitute parts can look different from the original.
$89.24 |
6% OFF Phone Price : $95.24
In Stock
#3
Gear box diagram
Bearing
Part #90053743
Replaced by #53743MA
?
Manufacturer substitution
This part replaces 90053743. Substitute parts can look different from the original.
This item is not returnable
$16.89 |
11% OFF Phone Price : $18.89
In Stock
#12
Gear box diagram
Quad ring
Part #90053737
Replaced by #53737MA
?
Manufacturer substitution
This part replaces 90053737. Substitute parts can look different from the original.
This item is not returnable
$8.49 |
11% OFF Phone Price : $9.49
In Stock
#1
Gear box diagram
Seal
Part #90053744
Replaced by #780151MA
?
Manufacturer substitution
This part replaces 90053744. Substitute parts can look different from the original.
This item is not returnable
$15.92 |
11% OFF Phone Price : $17.92
In Stock
#23
Motor mount assembly diagram
Washer
Part #90073840
Replaced by #712120MA
?
Manufacturer substitution
This part replaces 90073840. Substitute parts can look different from the original.
This item is not returnable
$8.49 |
11% OFF Phone Price : $9.49
In Stock
#28
Motor mount assembly diagram
Bolt
Part #90071015
Replaced by #1X20MA
?
Manufacturer substitution
This part replaces 90071015. Substitute parts can look different from the original.
$7.57
In Stock
#1
Upper handle assembly diagram
Retainer
Part #90003535
Replaced by #3535MA
?
Manufacturer substitution
This part replaces 90003535. Substitute parts can look different from the original.
This item is not returnable
$8.54 |
10% OFF Phone Price : $9.54
In Stock
#8
Gear box diagram
Gasket
Part #90000897
Replaced by #897MA
?
Manufacturer substitution
This part replaces 90000897. Substitute parts can look different from the original.
This item is not returnable
$22.85 |
21% OFF Phone Price : $28.85
In Stock
Symptoms for gas snowblowers
Choose a symptom to see related snowblower repairs.
Main causes: punctured tire, damaged rim…
Main causes: dirty carburetor, stale fuel…
Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…
Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…
Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…
Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…
Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…
Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…
Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…
Repair guides for gas snowblowers
These step-by-step repair guides will help you safely fix what’s broken on your snowblower.
How to replace a snowblower fuel filter
Replace the fuel filter on your snowblower if it's clogged or damaged.…
Repair difficulty
Time required
15 minutes or less
How to replace a snowblower shave plate
Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…
Repair difficulty
Time required
15 minutes or less
How to replace a snowblower chute control gearbox assembly
Replace the chute control gearbox on your snowblower if it's stripped or damaged.…
Repair difficulty
Time required
15 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.
Find easy DIY tips to fix your snowblower when it won't start…
Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…