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Lawn-Boy
Gas Walk-Behind Mower

Model # 10314-7900001 AND UP Official Lawn-Boy 21" walk-behind lawn mower

Here are the diagrams and repair parts for Official Lawn-Boy 10314-7900001-AND-UP 21" walk-behind lawn mower, 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.

Model diagram and schematic

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ALL PARTS
Showing 10 of 218 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 32144-85
#22

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
Primer 66-7460
#9

Engine 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
Screw 95-1726
#13

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
Lawn Mower Grass Bag 89804

#NI

All parts diagram

Lawn mower grass bag

Part #89804

$24.31
In Stock
Screw 92-9665
#1

Cover assembly diagram

Screw

Part #92-9665

Replaced by #92-9665

?
Manufacturer substitution
This part replaces 92-9665. Substitute parts can look different from the original.
This item is not returnable
$3.31
In Stock
Screw 49-2040
#2

Cover assembly diagram

Screw

Part #49-2040

Replaced by #49-2040

?
Manufacturer substitution
This part replaces 49-2040. Substitute parts can look different from the original.
This item is not returnable
$4.20
In Stock
Bail Brake 93-4184
#1

Handle assembly diagram

Bail brake

Part #93-4184

Replaced by #93-4184-03

?
Manufacturer substitution
This part replaces 93-4184. Substitute parts can look different from the original.
$52.64
In Stock
Adjusting Collar 610834
#4

Carburetor assembly diagram

Adjusting collar

Part #610834

Replaced by #610834

?
Manufacturer substitution
This part replaces 610834. Substitute parts can look different from the original.
This item is not returnable
$6.74
In Stock
Strap 92-2925
#12

Engine assembly diagram

Strap

Part #92-2925

Replaced by #92-2925

?
Manufacturer substitution
This part replaces 92-2925. Substitute parts can look different from the original.
This item is not returnable
$3.86
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 vibrate a lot?

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

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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 run rough?

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

Read more

Why won't my lawn mower move?

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

Read more

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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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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

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

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Read more
Repair difficulty
Time required
 15 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

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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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.…

Read more
Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…

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