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MTD
Lawn Edger

Model # 25B-520A700 Official MTD edger

Here are the diagrams and repair parts for Official MTD 25B-520A700 edger, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 72 parts  |
Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18 (replaces 753-05591) 712-04063
#15

Flywheel/pulley/wheels diagram

Yard machines lawn & garden equipment lock nut, 5/16-18 (replaces 753-05591)

Part #712-04063

BEST SELLER
This item is not returnable
$4.40 | 
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In Stock
Lawn Tractor Screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599) 710-0599
#3

Blade plate assembly diagram

Lawn tractor screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)

Part #710-0599

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$4.91 | 
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Knob-lower H 720-04052
#18

Flywheel/pulley/wheels diagram

Knob-lower h

Part #720-04052

Replaced by #720-04072A

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Manufacturer substitution
This part replaces 720-04052. Substitute parts can look different from the original.
BEST SELLER
$9.33 | 
10% OFF Phone Price : $10.33
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Yard Machines Lawn Mower Wheel 734-1987
#35

Flywheel/pulley/wheels diagram

Yard machines lawn mower wheel

Part #734-1987

$26.80 | 
18% OFF Phone Price : $32.80
In Stock
Belt Guard 781-0427
#21

Blade plate assembly diagram

Belt guard

Part #781-0427

Replaced by #781-0427-0637

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Manufacturer substitution
This part replaces 781-0427. Substitute parts can look different from the original.
This item is not returnable
$26.77 | 
18% OFF Phone Price : $32.77
In Stock
Lawn & Garden Equipment Self-tapping Screw 710-0726
#11

Flywheel/pulley/wheels diagram

Lawn & garden equipment self-tapping screw

Part #710-0726

Replaced by #710-0726

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Manufacturer substitution
This part replaces 710-0726. Substitute parts can look different from the original.
This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Handle 749-04184
#24

Flywheel/pulley/wheels diagram

Handle

Part #749-04184

Replaced by #749-04234

?
Manufacturer substitution
This part replaces 749-04184. Substitute parts can look different from the original.
$63.69 | 
9% OFF Phone Price : $69.69
In Stock
Ace Lawn Tractor Hex Screw 710-0654A
#3

Flywheel/pulley/wheels diagram

Ace lawn tractor hex screw

Part #710-0654A

This item is not returnable
$6.57 | 
13% OFF Phone Price : $7.57
In Stock
Lawn & Garden Equipment Flat Washer 736-0342
#26

Blade plate assembly diagram

Lawn & garden equipment flat washer

Part #736-0342

$12.34
In Stock
Lawn & Garden Equipment Shoulder Screw 738-0929
#39

Flywheel/pulley/wheels diagram

Lawn & garden equipment shoulder screw

Part #738-0929

This item is not returnable
$13.80
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…

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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

Effective articles & videos to help repair your lawn edgers

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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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…

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