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Model # 91788777 Official Craftsman snow thrower
Here are the diagrams and repair parts for Official Craftsman 91788777 snow thrower, as well as links to manuals and error code tables, if available.
There are a couple of ways to find the part or diagram you need:
- Click a diagram to see the parts shown on that diagram.
- In the search box below, enter all or part of the part number or the part’s name.
Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.
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For DIY troubleshooting advice and repair guides, visit our repair help section.
Model diagram and schematic
SEARCH WITHIN THIS MODEL
ALL PARTS
Showing 10 of 201 parts |
#52
Drive diagram
Pipe fitting
Part #132010
Replaced by #532409149
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Manufacturer substitution
This part replaces 132010. Substitute parts can look different from the original.
This item is not returnable
$5.31 |
16% OFF Phone Price : $6.31
In Stock
#15
Impeller & gear box diagram
Lock nut
Part #73900600
Replaced by #532409149
?
Manufacturer substitution
This part replaces 73900600. Substitute parts can look different from the original.
This item is not returnable
$5.31 |
16% OFF Phone Price : $6.31
In Stock
#9
Bag of parts diagram
Lock nut
Part #73800600
Replaced by #596322601
?
Manufacturer substitution
This part replaces 73800600. Substitute parts can look different from the original.
This item is not returnable
$5.11
In Stock
Lawn tractor hex bolt, 5/16-18 x 3/4-in (replaces 17000512)
Part #428867
This item is not returnable
$2.49 |
29% OFF Phone Price : $3.49
In Stock
Lawn & garden equipment lock nut
Part #73800400
Replaced by #582478602
?
Manufacturer substitution
This part replaces 73800400. Substitute parts can look different from the original.
This item is not returnable
$2.64 |
27% OFF Phone Price : $3.64
In Stock
Nut.flange.5
Part #155377
Replaced by #596039201
?
Manufacturer substitution
This part replaces 155377. Substitute parts can look different from the original.
This item is not returnable
$33.63
In Stock
#24
Impeller & gear box diagram
Auger worm gear
Part #407763
Replaced by #598831601
?
Manufacturer substitution
This part replaces 407763. Substitute parts can look different from the original.
$190.44 |
6% OFF Phone Price : $202.44
In Stock
#21
Impeller & traction belts diagram
Lock washer
Part #10040500
Replaced by #596238801
?
Manufacturer substitution
This part replaces 10040500. Substitute parts can look different from the original.
This item is not returnable
$33.63
In Stock
#2
Impeller & gear box diagram
Snowblower gearbox (replaces 174659, 532427148)
Part #427148
Replaced by #598831601
?
Manufacturer substitution
This part replaces 427148. Substitute parts can look different from the original.
$190.44 |
6% OFF Phone Price : $202.44
In Stock
#1
Lever/cable rotator diagram
Snowblower chute control assembly
Part #428272
Replaced by #532428272
?
Manufacturer substitution
This part replaces 428272. Substitute parts can look different from the original.
$111.41 |
10% OFF Phone Price : $123.41
In Stock
Symptoms for gas snowblowers
Choose a symptom to see related snowblower repairs.
Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…
Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…
Main causes: dirty carburetor, stale fuel…
Main causes: punctured tire, damaged rim…
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: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…
Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…
Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …
Repair guides for gas snowblowers
These step-by-step repair guides will help you safely fix what’s broken on your snowblower.
How to adjust snowblower engine valve lash
Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…
Repair difficulty
Time required
15 minutes or less
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.…
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
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.
Learn the steps to take to adjust and maintain your snowblower so it lasts longer.…
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.…