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Troybilt
Gas Walk-Behind Mower

Model # 11A-436N063 Official Troybilt 21" mulching mower

Here are the diagrams and repair parts for Official Troybilt 11A-436N063 21" mulching mower, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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Showing 10 of 63 parts  |
Bell Support 736-0524A
#34

Engine/handle/bag/deck 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.
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$6.58 | 
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Yard Machines Lawn & Garden Equipment Hex Bolt, 3/8-24 X 1-1/2-in (replaces 910-1044) 710-1044
#33

Engine/handle/bag/deck 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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$5.33 | 
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Lawn Mower Blade Adapter 748-0376C
#32A

Engine/handle/bag/deck diagram

Lawn mower blade adapter

Part #748-0376C

Replaced by #748-0376E

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Manufacturer substitution
This part replaces 748-0376C. Substitute parts can look different from the original.
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$23.53 | 
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Hinge Pin 747-0710
#29

Engine/handle/bag/deck diagram

Hinge pin

Part #747-0710

Replaced by #747-0710A

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Manufacturer substitution
This part replaces 747-0710. Substitute parts can look different from the original.
BEST SELLER
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$4.76 | 
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Lawn Mower Control Cable 746-1130
#16

Engine/handle/bag/deck diagram

Lawn mower control cable

Part #746-1130

Replaced by #946-1130

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Manufacturer substitution
This part replaces 746-1130. Substitute parts can look different from the original.
This item is not returnable
$14.49 | 
12% OFF Phone Price : $16.49
In Stock
Yard Machines Lawn & Garden Equipment Wing Nut (replaces 01002925, 920-0279) 720-0279
#3

Engine/handle/bag/deck diagram

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

Part #720-0279

This item is not returnable
$6.87 | 
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Yard Machines Lawn & Garden Equipment Guide Bolt 710-1205
#2

Engine/handle/bag/deck 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
Yard Machines Lawn & Garden Equipment Screw 710-1017
#54

Engine/handle/bag/deck diagram

Yard machines lawn & garden equipment screw

Part #710-1017

This item is not returnable
$12.71 | 
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In Stock
Nut 712-0431
#40

Engine/handle/bag/deck diagram

Nut

Part #712-0431

Replaced by #912-0431

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Manufacturer substitution
This part replaces 712-0431. Substitute parts can look different from the original.
This item is not returnable
$7.57 | 
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In Stock
Bail 747-1161A
#1

Engine/handle/bag/deck diagram

Bail

Part #747-1161A

Replaced by #747-1161A-0637

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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

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…

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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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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

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. …

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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…

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Repair difficulty
Time required
 45 minutes or less

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

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