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MTD
Gas Walk-Behind Mower

Model # 11A-510N720 THRU 11A-518N720 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 11A-510N720-THRU-11A-518N720 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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Showing 10 of 78 parts  |
Blade-21" Mu 742-0741
#73

Replacement parts 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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$29.10 | 
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Bell Support 736-0524A
#72

Replacement parts diagram

Bell support

Part #736-0524A

Replaced by #736-0524B-1

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Manufacturer substitution
This part replaces 736-0524A. 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
Cable Tie 726-0240
#17

Replacement parts diagram

Cable tie

Part #726-0240

Replaced by #726-0178

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Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Yard Machines Lawn & Garden Equipment Bolt 710-1174
#18

Replacement parts diagram

Yard machines lawn & garden equipment bolt

Part #710-1174

This item is not returnable
$10.97 | 
15% OFF Phone Price : $12.97
In Stock
Handle 749-0907
#19

Replacement parts diagram

Handle

Part #749-0907

Replaced by #749-0907B-0637

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Manufacturer substitution
This part replaces 749-0907. Substitute parts can look different from the original.
$72.62
In Stock
Throttle Cable 746-0841
#12

Replacement parts diagram

Throttle cable

Part #746-0841

Replaced by #946-0674A

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Manufacturer substitution
This part replaces 746-0841. Substitute parts can look different from the original.
$27.09
In Stock
Lawn Mower Rear Skirt Wire Rod 732-0700
#14

Replacement parts diagram

Lawn mower rear skirt wire rod

Part #732-0700

Replaced by #732P0700

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Manufacturer substitution
This part replaces 732-0700. Substitute parts can look different from the original.
$7.63
In Stock
Bolt 738-0507B
Bolt

Part #738-0507B

$7.63
In Stock
Lawn Mower Shoulder Screw (replaces 938-0102) 738-0102
#89

Replacement parts diagram

Lawn mower shoulder screw (replaces 938-0102)

Part #738-0102

$14.60
In Stock
Lawn & Garden Equipment Hex Bolt (replaces 01000943, 910-1257) 710-1257
#75

Replacement parts diagram

Lawn & garden equipment hex bolt (replaces 01000943, 910-1257)

Part #710-1257

This item is not returnable
$9.85 | 
9% OFF Phone Price : $10.85
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…

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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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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.…

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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

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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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