Gas Walk-Behind Mower

Model # 12A-370N720 THRU 12A-389N720 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 12A-370N720 THRU 12A-389N720 lawn mower, as well as links to manuals and error code tables, if available.

By Schematic
By Part
SELECT DIAGRAM
?

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

Browse Parts for
12A-370N720 THRU 12A-389N720 Walk-Behind Mowers
Blade-21" Mu 742-0741
#73

Models 370 thru 379 diagram

Blade-21" mu

Part #742-0741

Replaced by #942-0741A

?
Manufacturer substitution
This part replaces 742-0741. Substitute parts can look different from the original.
BEST SELLER

Get free shipping with Automatic Reorder

$27.71
18% OFF Phone Price : $33.71
In Stock
Bell Support 736-0524A
#72

Models 370 thru 379 diagram

Bell support

Part #736-0524A

Replaced by #736-0524B-1

?
Manufacturer substitution
This part replaces 736-0524A. Substitute parts can look different from the original.
BEST SELLER

Get free shipping with Automatic Reorder

$6.78
13% OFF Phone Price : $7.78
Back Order
Yard Machines Lawn & Garden Equipment Cupped Washer 736-0270
#96

Models 370 thru 379 diagram

Yard machines lawn & garden equipment cupped washer

Part #736-0270

This item is not returnable
$5.10
16% OFF Phone Price : $6.10
In Stock
Cable Tie 726-0240
#17

Models 370 thru 379 diagram

Cable tie

Part #726-0240

Replaced by #726-0178

?
Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
In Stock
Kill Cable 746-0843
#12

Models 370 thru 379 diagram

Kill cable

Part #746-0843

Replaced by #946-0671A

?
Manufacturer substitution
This part replaces 746-0843. Substitute parts can look different from the original.
$18.37
10% OFF Phone Price : $20.37
In Stock
Lever Spring 732-0803
#94

Models 370 thru 379 diagram

Lever spring

Part #732-0803

Replaced by #732-0803A

?
Manufacturer substitution
This part replaces 732-0803. Substitute parts can look different from the original.
This item is not returnable
In Stock
Lawn & Garden Equipment Machine Screw (replaces 753-04430, 910-0605) 710-0605
#3

Models 370 thru 379 diagram

Lawn & garden equipment machine screw (replaces 753-04430, 910-0605)

Part #710-0605

This item is not returnable
$6.76
13% OFF Phone Price : $7.76
In Stock
Ace Lawn Tractor Hex Screw 710-0654A
#52

Models 370 thru 379 diagram

Ace lawn tractor hex screw

Part #710-0654A

This item is not returnable
$6.57
13% OFF Phone Price : $7.57
In Stock
Ryobi Lawn & Garden Equipment Nut 712-0324
Ryobi lawn & garden equipment nut

Part #712-0324

This item is not returnable
$4.72
17% OFF Phone Price : $5.72
In Stock
Lawn Mower Rear Skirt Wire Rod 732-0700
#14

Models 370 thru 379 diagram

Lawn mower rear skirt wire rod

Part #732-0700

Replaced by #732P0700

?
Manufacturer substitution
This part replaces 732-0700. Substitute parts can look different from the original.
In Stock

Symptoms for gas walk-behind mowers

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

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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

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

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

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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.

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…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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.

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

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.…

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.…

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.…