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Lawn-Boy
Gas Snowblower

Model # 522R (28230-7900001 & UP) Official Lawn-Boy snow thrower

Here are the diagrams and repair parts for Official Lawn-Boy 522R-28230-7900001-UP 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:

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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 388 parts  |
Toro Screw 12-3270
#4

Traction assembly diagram

Toro screw

Part #12-3270

This item is not returnable
$3.87
In Stock
Gear 5-7180
#43

Auger assembly (continued) diagram

Gear

Part #5-7180

$160.73
In Stock
Bearing Assembly 12-8789

#NI

All parts diagram

Bearing assembly

Part #12-8789

$34.22
In Stock
Oil Plug 281-7
#19

Engine assembly diagram

Oil plug

Part #281-7

Replaced by #281-7

?
Manufacturer substitution
This part replaces 281-7. Substitute parts can look different from the original.
This item is not returnable
$7.26
In Stock
Mount Clutch 66-6790
#7

Traction assembly diagram

Mount clutch

Part #66-6790

Replaced by #66-6790

?
Manufacturer substitution
This part replaces 66-6790. Substitute parts can look different from the original.
$13.80
In Stock
Pin 3290-243
#19

Traction assembly diagram

Pin

Part #3290-243

Replaced by #3290-243

?
Manufacturer substitution
This part replaces 3290-243. Substitute parts can look different from the original.
$42.36
In Stock
Screw 32144-70
Screw

Part #32144-70

Replaced by #32144-70

?
Manufacturer substitution
This part replaces 32144-70. Substitute parts can look different from the original.
This item is not returnable
$4.20
In Stock
Post Linkage 47-4990
Post linkage

Part #47-4990

Replaced by #47-4990

?
Manufacturer substitution
This part replaces 47-4990. Substitute parts can look different from the original.
$35.44
In Stock
Screw 3242-4
#17

Auger assembly diagram

Screw

Part #3242-4

Replaced by #3242-4

?
Manufacturer substitution
This part replaces 3242-4. Substitute parts can look different from the original.
This item is not returnable
$4.83
In Stock
Rod Chute Co 40-8270
#1

Handle assembly left side diagram

Rod chute co

Part #40-8270

Replaced by #40-8270

?
Manufacturer substitution
This part replaces 40-8270. Substitute parts can look different from the original.
$188.54
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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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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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 does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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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 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

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

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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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Repair difficulty
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 15 minutes or less
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 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

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

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