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MTD
Gas Walk-Behind Mower

Model # 12AV839Q795 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 12AV839Q795 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.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 91 parts  |
Blade-21" Mu 742-0741
#20

Grassbag/handle/mulch plug diagram

Blade-21" mu

Part #742-0741

Replaced by #942-0741A

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Manufacturer substitution
This part replaces 742-0741. Substitute parts can look different from the original.
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$27.71 | 
18% OFF Phone Price : $33.71
In Stock
Lawn Mower Blade Support (replaces 936-0524a) 736-0524B
#19

Grassbag/handle/mulch plug diagram

Lawn mower blade support (replaces 936-0524a)

Part #736-0524B

Replaced by #736-0524B-1

?
Manufacturer substitution
This part replaces 736-0524B. Substitute parts can look different from the original.
BEST SELLER

Get free shipping with Automatic Reorder

$6.58 | 
13% OFF Phone Price : $7.58
In Stock
Torsion Spring 732-1014
#41

Grassbag/handle/mulch plug diagram

Torsion spring

Part #732-1014

Replaced by #732-1014C

?
Manufacturer substitution
This part replaces 732-1014. Substitute parts can look different from the original.
$9.11 | 
10% OFF Phone Price : $10.11
In Stock
Yard Machines Lawn & Garden Equipment Wing Nut (replaces 01002925, 920-0279) 720-0279
#37

Grassbag/handle/mulch plug diagram

Yard machines lawn & garden equipment wing nut (replaces 01002925, 920-0279)

Part #720-0279

This item is not returnable
$6.87 | 
13% OFF Phone Price : $7.87
In Stock
Yard Machines Lawn & Garden Equipment Guide Bolt 710-1205
#38

Grassbag/handle/mulch plug diagram

Yard machines lawn & garden equipment guide bolt

Part #710-1205

This item is not returnable
$5.01 | 
17% OFF Phone Price : $6.01
In Stock
Toro Lawn & Garden Equipment Flat Washer 736-3084
#16

Wheels/drive diagram

Toro lawn & garden equipment flat washer

Part #736-3084

This item is not returnable
$6.14 | 
14% OFF Phone Price : $7.14
In Stock
Bail 747-1161A
#5

Grassbag/handle/mulch plug diagram

Bail

Part #747-1161A

Replaced by #747-1161A-0637

?
Manufacturer substitution
This part replaces 747-1161A. Substitute parts can look different from the original.
This item is not returnable
$20.10 | 
23% OFF Phone Price : $26.10
In Stock
Lawn & Garden Equipment Carriage Bolt 710-0260A
#25

Grassbag/handle/mulch plug diagram

Lawn & garden equipment carriage bolt

Part #710-0260A

This item is not returnable
$6.55 | 
13% OFF Phone Price : $7.55
In Stock
Lawn Mower Hex Screw, 1/4-15 X 1-in 710-1241
#30

Grassbag/handle/mulch plug diagram

Lawn mower hex screw, 1/4-15 x 1-in

Part #710-1241

This item is not returnable
$10.14 | 
16% OFF Phone Price : $12.14
In Stock
Kmart Lawn Tractor Rivet 728-0199
#49

Grassbag/handle/mulch plug diagram

Kmart lawn tractor rivet

Part #728-0199

This item is not returnable
$5.75 | 
15% OFF Phone Price : $6.75
In Stock

Symptoms for gas walk-behind mowers

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

View all

Why does my lawn mower run rough?

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

Read more

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…

Read more

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

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

Top questions about Sears and Sears PartsDirect

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

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