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MTD
Gas Walk-Behind Mower

Model # 129-459R000 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 129-459R000 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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ALL PARTS
Showing 10 of 103 parts  |
Lawn & Garden Equipment Hex Bolt, 3/8-24 X 1-1/2-in (replaces 910-1044) 710-1044
#75

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
$4.98 | 
22% OFF MSRP : $6.40
In Stock
Lawn & Garden Equipment Screw 710-1017
#45

Lawn mower diagram

Lawn & garden equipment screw

Part #710-1017

This item is not returnable
$12.71 | 
14% OFF Phone Price : $14.71
In Stock
Cable Tie 726-0240
#17

Lawn mower 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
Lawn & Garden Equipment Nut 712-0711
#42

Lawn mower diagram

Lawn & garden equipment nut

Part #712-0711

This item is not returnable
$5.71
In Stock
Index Plate 14764C
#84

Lawn mower diagram

Index plate

Part #14764C

$8.85
In Stock
Spring 732-0417A
#87

Lawn mower diagram

Spring

Part #732-0417A

$14.55
In Stock
Screw-hex Ab 710-1025
#71

Lawn mower diagram

Screw-hex ab

Part #710-1025

This item is not returnable
$6.66
In Stock
Lawn Mower Shoulder Screw (replaces 938-0102) 738-0102
#89

Lawn mower diagram

Lawn mower shoulder screw (replaces 938-0102)

Part #738-0102

$13.57
In Stock
Rear Flap As 731-0669
#56

Lawn mower diagram

Rear flap as

Part #731-0669

$63.09
In Stock
Washer 736-0463
#65

Lawn mower diagram

Washer

Part #736-0463

This item is not returnable
$7.20
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. …

Read more
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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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…

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

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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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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