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Lawn-Boy
Gas Snowblower

Model # 320 (28222-8900001 & UP) Official Lawn-Boy snow thrower

Here are the diagrams and repair parts for Official Lawn-Boy 320-28222-8900001-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.

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.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 247 parts  |
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
Brake Spring 71-5470
#14

Rotor housing assembly diagram

Brake spring

Part #71-5470

This item is not returnable
$4.94
In Stock
Spring Cover 71-5530
#3

Handle assembly diagram

Spring cover

Part #71-5530

$8.83
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
Adj Clutch C 71-5330
#5

Handle assembly diagram

Adj clutch c

Part #71-5330

Replaced by #136-7126

?
Manufacturer substitution
This part replaces 71-5330. Substitute parts can look different from the original.
$9.26
In Stock
Cap Screw 321-30
#21

Rotor housing assembly diagram

Cap screw

Part #321-30

Replaced by #321-30

?
Manufacturer substitution
This part replaces 321-30. Substitute parts can look different from the original.
$10.60
In Stock
Washer 3256-55
#20

Rotor housing assembly diagram

Washer

Part #3256-55

Replaced by #3256-55

?
Manufacturer substitution
This part replaces 3256-55. Substitute parts can look different from the original.
$7.74
In Stock
Cap Screw 322-3
Cap screw

Part #322-3

Replaced by #322-3

?
Manufacturer substitution
This part replaces 322-3. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Lock Nut 32128-10
#31

Rotor housing assembly diagram

Lock nut

Part #32128-10

Replaced by #32128-10

?
Manufacturer substitution
This part replaces 32128-10. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Idler Brake 71-5160
#15

Rotor housing assembly diagram

Idler brake

Part #71-5160

Replaced by #71-5160

?
Manufacturer substitution
This part replaces 71-5160. Substitute parts can look different from the original.
$35.42
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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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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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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Main causes: dirty carburetor, stale fuel…

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Main causes: punctured tire, damaged rim…

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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 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 chute turn?

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

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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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Repair guides for gas snowblowers

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How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

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 15 minutes or less
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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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 15 minutes or less
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How to replace a snowblower shave plate

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 15 minutes or less

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