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Troybilt
Gas Walk-Behind Mower

Model # 34021 Official Troybilt walk-behind lawn mower

Here are the diagrams and repair parts for Official Troybilt 34021 walk-behind lawn 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 136 parts  |
Pin 1766536
#16

Handlebar and mower controls--models 34020 and 34021 diagram

Pin

Part #1766536

Replaced by #911-0813

?
Manufacturer substitution
This part replaces 1766536. Substitute parts can look different from the original.
$10.50 | 
16% OFF Phone Price : $12.50
In Stock
Screw 1767754
Screw

Part #1767754

Replaced by #710-04460

?
Manufacturer substitution
This part replaces 1767754. Substitute parts can look different from the original.
$7.83
In Stock
Lock Washer 9914
#24

Engines, mower deck and blade assemblies diagram

Lock washer

Part #9914

Replaced by #736-0921

?
Manufacturer substitution
This part replaces 9914. Substitute parts can look different from the original.
$7.71
In Stock
Clip 1765550
#12

Cutting height control and wheel assemblies diagram

Clip

Part #1765550

Replaced by #1765550

?
Manufacturer substitution
This part replaces 1765550. Substitute parts can look different from the original.
$19.74
In Stock
Cotter Pin 9338
#14

Wheel drive assemblies--models 34021, 34022, 34023, 34311 diagram

Cotter pin

Part #9338

Replaced by #714-04048

?
Manufacturer substitution
This part replaces 9338. Substitute parts can look different from the original.
$13.91
In Stock
Hex Nut 9807
#14

Cutting height control and wheel assemblies diagram

Hex nut

Part #9807

Replaced by #712-0375

?
Manufacturer substitution
This part replaces 9807. Substitute parts can look different from the original.
This item is not returnable
$6.37
In Stock
Knob 9057
#28

Handlebar and mower controls--models 34020 and 34021 diagram

Knob

Part #9057

Replaced by #GW-9057

?
Manufacturer substitution
This part replaces 9057. Substitute parts can look different from the original.
$12.58 | 
14% OFF Phone Price : $14.58
In Stock
Nut 1766514
#10

Engines, mower deck and blade assemblies diagram

Nut

Part #1766514

Replaced by #912-0273

?
Manufacturer substitution
This part replaces 1766514. Substitute parts can look different from the original.
$7.94
In Stock
Kit 1768306
#22

Engines, mower deck and blade assemblies diagram

Kit

Part #1768306

Replaced by #1764381

?
Manufacturer substitution
This part replaces 1768306. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$49.40
In Stock
Cover 1768954
#5

Engines, mower deck and blade assemblies diagram

Cover

Part #1768954

Replaced by #956-04183

?
Manufacturer substitution
This part replaces 1768954. Substitute parts can look different from the original.
$106.14
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

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…

Read more
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…

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

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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