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Lawn-Boy
Gas Walk-Behind Mower

Model # 10321-790001 & UP Official Lawn-Boy lawn mower

Here are the diagrams and repair parts for Official Lawn-Boy 10321-790001-UP lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 110 parts  |
Rope Guide 93-7383
#16

Handle assembly diagram

Rope guide

Part #93-7383

Replaced by #86-9671

?
Manufacturer substitution
This part replaces 93-7383. Substitute parts can look different from the original.
This item is not returnable
$5.74 | 
15% OFF Phone Price : $6.74
In Stock
Screw 95-1726
#3

Engine assembly diagram

Screw

Part #95-1726

Replaced by #95-1726

?
Manufacturer substitution
This part replaces 95-1726. Substitute parts can look different from the original.
This item is not returnable
$3.74
In Stock
Screw 32144-85
#11

Rear axle assembly diagram

Screw

Part #32144-85

Replaced by #32144-85

?
Manufacturer substitution
This part replaces 32144-85. Substitute parts can look different from the original.
This item is not returnable
$3.31
In Stock
Belt, 21-in 612543
#17

Engine assembly diagram

Belt, 21-in

Part #612543

Replaced by #612543-03

?
Manufacturer substitution
This part replaces 612543. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$31.17 | 
16% OFF Phone Price : $37.17
In Stock
Trailing Shield 92-8647
#38

Housing assembly diagram

Trailing shield

Part #92-8647

Replaced by #92-8647

?
Manufacturer substitution
This part replaces 92-8647. Substitute parts can look different from the original.
$54.20
In Stock
Output Shaft 93-0239
#7

Gear assembly diagram

Output shaft

Part #93-0239

Replaced by #104-7670

?
Manufacturer substitution
This part replaces 93-0239. Substitute parts can look different from the original.
$165.74
In Stock
Starter Handle 92-4853
#14

Handle assembly diagram

Starter handle

Part #92-4853

Replaced by #92-4853

?
Manufacturer substitution
This part replaces 92-4853. Substitute parts can look different from the original.
$15.69
In Stock
Grass Shield 93-4196
#19

Engine assembly diagram

Grass shield

Part #93-4196

Replaced by #93-4196-03

?
Manufacturer substitution
This part replaces 93-4196. Substitute parts can look different from the original.
$25.74
In Stock
Gear 65-4750
#16

Rear axle assembly diagram

Gear

Part #65-4750

Replaced by #65-4750

?
Manufacturer substitution
This part replaces 65-4750. Substitute parts can look different from the original.
$15.17
In Stock
Screw 32144-4
#9

Gear assembly diagram

Screw

Part #32144-4

Replaced by #32144-4

?
Manufacturer substitution
This part replaces 32144-4. Substitute parts can look different from the original.
This item is not returnable
$2.66
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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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

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