Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
MTD
Gas Walk-Behind Mower

Model # 125-570A Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 125-570A 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.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 139 parts  |
Bearing 741-0919
#43

Deck and pulley system diagram

Bearing

Part #741-0919

Replaced by #941-0919B

?
Manufacturer substitution
This part replaces 741-0919. Substitute parts can look different from the original.
BEST SELLER
$20.95 | 
19% OFF Phone Price : $25.95
In Stock
Bolt 710-0134
#44

Mower deck diagram

Bolt

Part #710-0134

Replaced by #710-0134

?
Manufacturer substitution
This part replaces 710-0134. Substitute parts can look different from the original.
$6.55 | 
13% OFF Phone Price : $7.55
In Stock
Cap Screw 710-0258
#39

Deck and pulley system diagram

Cap screw

Part #710-0258

Replaced by #710-0751

?
Manufacturer substitution
This part replaces 710-0258. Substitute parts can look different from the original.
This item is not returnable
$5.12 | 
16% OFF Phone Price : $6.12
In Stock
Palnut 726-0106
#1

Deck and pulley system diagram

Palnut

Part #726-0106

Replaced by #726-0106

?
Manufacturer substitution
This part replaces 726-0106. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Washer 736-0119
Washer

Part #736-0119

The manufacturer no longer makes this part, and there's no substitute part

Cotter 714-0104
#1

Engine/throttle control diagram

Cotter

Part #714-0104

The manufacturer no longer makes this part, and there's no substitute part

Bell Wash 736-0105
Bell wash

Part #736-0105

Replaced by #736-0105

?
Manufacturer substitution
This part replaces 736-0105. Substitute parts can look different from the original.
This item is not returnable
$5.83
In Stock
Cotter Pin 714-0115
Cotter pin

Part #714-0115

The manufacturer no longer makes this part, and there's no substitute part

Hex Screw 710-0567
#25

Engine/throttle control diagram

Hex screw

Part #710-0567

Replaced by #910-0195

?
Manufacturer substitution
This part replaces 710-0567. Substitute parts can look different from the original.
This item is not returnable
$5.80
In Stock
Stop Nut 712-0429
Stop nut

Part #712-0429

Replaced by #912-0429

?
Manufacturer substitution
This part replaces 712-0429. Substitute parts can look different from the original.
This item is not returnable
$3.52 | 
22% OFF Phone Price : $4.52
In Stock

Symptoms for gas walk-behind mowers

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

View all

Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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 vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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…

Read more

Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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

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.

View all
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.

View all
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…

Read more
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.…

Read more
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.…

Read more

Parts & More