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MTD
Gas Walk-Behind Mower

Model # 11A-021C700 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 11A-021C700 lawn mower, as well as links to manuals and error code tables, if available.

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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 30 parts  |
Lock Washer 736-0119
#20

Mower parts diagram

Lock washer

Part #736-0119

Replaced by #936-0119

?
Manufacturer substitution
This part replaces 736-0119. Substitute parts can look different from the original.
This item is not returnable
$6.05 | 
14% OFF Phone Price : $7.05
In Stock
Lawn Tractor Hex Bolt 710-3008
#16

Mower parts diagram

Lawn tractor hex bolt

Part #710-3008

This item is not returnable
$4.62 | 
18% OFF Phone Price : $5.62
In Stock
Cable Tie 726-0240
#26

Mower parts diagram

Cable tie

Part #726-0240

Replaced by #726-0178

?
Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Blade-20" W/ 742-0640
#11

Mower parts diagram

Blade-20" w/

Part #742-0640

Replaced by #942-0640

?
Manufacturer substitution
This part replaces 742-0640. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$24.79 | 
19% OFF Phone Price : $30.79
In Stock
Ace Lawn & Garden Equipment Flange Lock Nut 712-3004A
#17

Mower parts diagram

Ace lawn & garden equipment flange lock nut

Part #712-3004A

This item is not returnable
$4.92 | 
17% OFF Phone Price : $5.92
In Stock
Bail Control 747-0976
#5

Mower parts diagram

Bail control

Part #747-0976

Replaced by #747-0976B

?
Manufacturer substitution
This part replaces 747-0976. Substitute parts can look different from the original.
$34.18
In Stock
Ryobi Lawn & Garden Equipment Hex Nut 712-0798
#25

Mower parts diagram

Ryobi lawn & garden equipment hex nut

Part #712-0798

This item is not returnable
$6.11
In Stock
Washer 736-0173
#14

Mower parts diagram

Washer

Part #736-0173

This item is not returnable
$5.94
In Stock
Ryobi Lawn & Garden Equipment Nut 712-0324
#15

Mower parts diagram

Ryobi lawn & garden equipment nut

Part #712-0324

This item is not returnable
$4.72 | 
17% OFF Phone Price : $5.72
In Stock
Lawn & Garden Equipment Wheel Axle Bolt (replaces 938-0533) 738-0533
#23

Mower parts diagram

Lawn & garden equipment wheel axle bolt (replaces 938-0533)

Part #738-0533

$11.74
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…

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…

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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

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