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Lawn-Boy
Gas Snowblower

Model # 320 (28220-8900001 & UP) Official Lawn-Boy snow thrower

Here are the diagrams and repair parts for Official Lawn-Boy 320-28220-8900001-UP snow thrower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 247 parts  |
Lock Nut 3296-29
Lock nut

Part #3296-29

The manufacturer no longer makes this part, and there's no substitute part

Nut 32149-1
#40

Upper shroud asm - cont. diagram

Nut

Part #32149-1

The manufacturer no longer makes this part, and there's no substitute part

Primer 66-7460
#12

Upper shroud assembly diagram

Primer

Part #66-7460

Replaced by #66-7460

?
Manufacturer substitution
This part replaces 66-7460. Substitute parts can look different from the original.
This item is not returnable
$8.49
In Stock
Spring Cover 71-5530
#3

Handle assembly diagram

Spring cover

Part #71-5530

$8.83
In Stock
Brake Spring 71-5470
#14

Rotor housing assembly diagram

Brake spring

Part #71-5470

This item is not returnable
$4.94
In Stock
Toro Screw 12-3270
#25

Rotor housing assembly diagram

Toro screw

Part #12-3270

This item is not returnable
$3.87
In Stock
Spacer 57-3830
#7

Rotor housing assembly diagram

Spacer

Part #57-3830

Replaced by #57-3830

?
Manufacturer substitution
This part replaces 57-3830. Substitute parts can look different from the original.
$9.71
In Stock
Washer 3256-68
#43

Upper shroud asm - cont. diagram

Washer

Part #3256-68

Replaced by #3256-68

?
Manufacturer substitution
This part replaces 3256-68. Substitute parts can look different from the original.
This item is not returnable
$5.74
In Stock
Starter Motor 77-0402
Starter motor

Part #77-0402

Replaced by #77-0400

?
Manufacturer substitution
This part replaces 77-0402. Substitute parts can look different from the original.
$695.35
In Stock
Deflector 56-2680
#44

Upper shroud asm - cont. diagram

Deflector

Part #56-2680

Replaced by #56-2680

?
Manufacturer substitution
This part replaces 56-2680. Substitute parts can look different from the original.
$24.07
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

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Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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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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Why won't my snowblower start?

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

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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 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…

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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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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…

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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.

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How to replace a snowblower fuel filter

How to replace a snowblower fuel filter

Replace the fuel filter on your snowblower if it's clogged or damaged.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower shave plate

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.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower chute control gearbox assembly

How to replace a snowblower chute control gearbox assembly

Replace the chute control gearbox on your snowblower if it's stripped or damaged.…

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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.

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How to make your snowblower last longer

How to make your snowblower last longer

Learn the steps to take to adjust and maintain your snowblower so it lasts longer.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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