MTD
Gas Walk-Behind Mower

Model #11A-A18N255 Official MTD lawn mower

Here are the diagrams and repair parts for MTD 11A-A18N255 lawn mower, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual
Search within this model
Parts List

Showing 10 of 50 parts

Lawn Mower Grass Bag Frame (replaces 647-04271, 747-05226)#3

Lawn mower Diagram

Frame=grssbg

Part #747-05226
Replaced by #647-04271-0637
?
Manufacturer substitution
This part replaces 747-05226. Substitute parts can look different from the original.
BEST SELLER
In Stock
$42.63 | 
18% OFF 
MSRP: $52.00
Lawn Mower Zone Control Cable (replaces 946-04661)#34C

Lawn mower Diagram

Lawn mower control cable

Part #946-04661
Replaced by #946-04661A
?
Manufacturer substitution
This part replaces 946-04661. Substitute parts can look different from the original.
BEST SELLER
In Stock
$14.31 | 
35% OFF 
MSRP: $22.00
Lawn & Garden Equipment Nut#32

Lawn mower Diagram

Lawn & garden equipment nut

Part #712-04064
BEST SELLER
This item is not returnable
In Stock
$3.17 | 
37% OFF 
MSRP: $5.00
Lawn & Garden Equipment Hex Bolt, 3/8-24 x 1-1/2-in (replaces 910-1044)#25

Lawn mower Diagram

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

Part #710-1044
BEST SELLER
This item is not returnable
In Stock
$3.20 | 
50% OFF 
MSRP: $6.40
Lawn Mower Blade Adapter (replaces 748-04096, 748-04227)#23A

Lawn mower Diagram

Lawn mower blade adapter

Part #748-04096
Replaced by #753-06304
?
Manufacturer substitution
This part replaces 748-04096. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
In Stock
$26.41 | 
14% OFF 
Phone Price: $30.64
Lawn Mower Axle Assembly, Rear (replaces 911-04142A)#21

Lawn mower Diagram

Lawn mower axle assembly

Part #911-04142
Replaced by #611-04142A
?
Manufacturer substitution
This part replaces 911-04142. Substitute parts can look different from the original.
BEST SELLER
In Stock
$31.24 | 
20% OFF 
MSRP: $39.00
Lawn & Garden Equipment Flange Nut#28

Lawn mower Diagram

Lawn & garden equipment flange nut

Part #712-04217
BEST SELLER
In Stock
$6.58 | 
13% OFF 
Phone Price: $7.58
Lawn & Garden Equipment Shoulder Screw (replaces 738-04419)#27

Lawn mower Diagram

Lawn & garden equipment shoulder screw (replaces 738-04419)

Part #738-04419A
BEST SELLER
This item is not returnable
In Stock
$4.92 | 
25% OFF 
MSRP: $6.60
Lawn Mower Bail Control Bar (replaces 747-05184C)#1

Lawn mower Diagram

Bail

Part #747-05184
Replaced by #747-05184D
?
Manufacturer substitution
This part replaces 747-05184. Substitute parts can look different from the original.
BEST SELLER

Get free shipping with Automatic Reorder

In Stock
$11.49 | 
15% OFF 
Phone Price: $13.49
Lawn Mower Square Nut#12

Lawn mower Diagram

Lawn mower square nut

Part #712-04222
BEST SELLER
This item is not returnable
In Stock
$8.40 | 
11% OFF 
Phone Price: $9.40

Symptoms for gas walk-behind mowers

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

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up
Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent
Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

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.

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 cracked.

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged.

Repair difficulty
Time required
 15 minutes or less
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 replace this tiny but essential part.

Repair difficulty
Time required
 45 minutes or less

Articles and videos common to all walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

February 11, 2023

Top 10 electric lawn and garden tools for 2023

Top 10 electric lawn and garden tools for 2023

Learn about the top 10 must-have electric lawn & garden tools for 2023

August 30, 2022

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.

August 11, 2022

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect