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MTD
Gas Walk-Behind Mower

Model # 11A-B2A9791 Official MTD gas lawn mower

Here are the diagrams and repair parts for Official MTD 11A-B2A9791 gas 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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Model diagram and schematic

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ALL PARTS
Showing 10 of 177 parts  |
Air Filter BS-593260
#NI01

Lawn mower diagram

Air filter

Part #BS-593260

Replaced by #593260

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Manufacturer substitution
This part replaces BS-593260. Substitute parts can look different from the original.
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$17.55 | 
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Lawn Mower Mulching Plug Assembly (replaces 987-02516) 987-02516A
#NI11

Lawn mower diagram

Lawn mower mulching plug assembly (replaces 987-02516)

Part #987-02516A

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$25.65 | 
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Lawn Mower Grass Bag Frame (replaces 647-04271, 747-05226) 647-04271-0637
#NI09

Lawn mower diagram

Lawn mower grass bag frame (replaces 647-04271, 747-05226)

Part #647-04271-0637

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$46.79 | 
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Lawn Mower Deflector Shield 731-07131
#NI07

Lawn mower diagram

Lawn mower deflector shield

Part #731-07131

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$22.35 | 
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Yard Machines Lawn & Garden Equipment Hex Bolt, 3/8-24 X 1-1/2-in (replaces 910-1044) 710-1044
#NI05

Lawn mower diagram

Yard machines lawn & garden equipment hex bolt, 3/8-24 x 1-1/2-in (replaces 910-1044)

Part #710-1044

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This item is not returnable
$5.33 | 
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Lawn Mower Blade Adapter 748-04096
#NI04

Lawn mower diagram

Lawn mower blade adapter

Part #748-04096

Replaced by #753-06304

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Manufacturer substitution
This part replaces 748-04096. Substitute parts can look different from the original.
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This item is not returnable
$29.60 | 
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Lawn Mower Wheel (replaces 634-04630) 634-05062
#NI14

Lawn mower diagram

Lawn mower wheel (replaces 634-04630)

Part #634-05062

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Lawn Mower 21-in Deck Xtreme Mulching Blade 942-0741-X
#NI03

Lawn mower diagram

Lawn mower 21-in deck xtreme mulching blade

Part #942-0741-X

Replaced by #742P0741-X

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Manufacturer substitution
This part replaces 942-0741-X. Substitute parts can look different from the original.
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$22.02 | 
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Kmart Lawn Mower Wheel 634-04642
#NI15

Lawn mower diagram

Kmart lawn mower wheel

Part #634-04642

$35.83 | 
14% OFF Phone Price : $41.83
In Stock
Lawn Mower Rear Skirt 731-07203
#NI13

Lawn mower diagram

Lawn mower rear skirt

Part #731-07203

$15.19 | 
12% OFF Phone Price : $17.19
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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…

Read more

Why does my lawn mower cut unevenly?

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

Read more

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.…

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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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