MTD
Gas Walk-Behind Mower

Model #12A-559K062 Official MTD gas lawn mower

Here are the diagrams and repair parts for MTD 12A-559K062 gas lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual
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Parts List

Showing 10 of 149 parts

Lawn Tractor Ball Bearing (replaces 01000340, 1185064, 741-0600, 941-0124, 95406)#8

Wheels/tires/belt Diagram

Bearing

Part #741-0124
Replaced by #941-0600
?
Manufacturer substitution
This part replaces 741-0124. Substitute parts can look different from the original.
BEST SELLER
In Stock
$25.63 | 
16% OFF 
Phone Price: $30.63
Lawn & Garden Equipment Wing Nut (replaces 01000203, 912-0397)

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Wing nut

Part #712-0397
Replaced by #712-0397A
?
Manufacturer substitution
This part replaces 712-0397. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
In Stock
$5.22 | 
16% OFF 
Phone Price: $6.22
Lawn & Garden Equipment Guide Bolt

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Lawn & garden equipment guide bolt

Part #710-1205
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This item is not returnable
In Stock
$5.01 | 
17% OFF 
Phone Price: $6.01
Lawn & Garden Equipment Wing Nut (replaces 01002925, 920-0279)

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Lawn & garden equipment wing nut (replaces 01002925, 920-0279)

Part #720-0279
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This item is not returnable
In Stock
$6.87 | 
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Phone Price: $7.87
Lawn & Garden Equipment Hex Bolt (replaces 01000943, 910-1257)

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In Stock
$9.85 | 
9% OFF 
Phone Price: $10.85
Lawn & Garden Equipment Hex Screw

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Lawn & garden equipment hex screw

Part #710-0896
This item is not returnable
In Stock
$5.44 | 
16% OFF 
Phone Price: $6.44
Lawn Mower Wheel#49

Deck/handle/wheels/bag Diagram

Complete wheel

Part #734-2042
Replaced by #734-2042A
?
Manufacturer substitution
This part replaces 734-2042. Substitute parts can look different from the original.
In Stock
$39.27 | 
11% OFF 
Phone Price: $44.27
Lawn & Garden Equipment Bell Washer

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Lawn & garden equipment bell washer

Part #736-0331
This item is not returnable
In Stock
$4.91 | 
17% OFF 
Phone Price: $5.91
Lawn Mower Transmission Tension Spring#82

Deck/handle/wheels/bag Diagram

Lawn mower transmission tension spring

Part #732-1043
This item is not returnable
In Stock
$5.91

Symptoms for gas walk-behind mowers

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

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up
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: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

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

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 cracked.

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

Check your lawn mower blade regularly and replaced it if it's bent or damaged.

Repair difficulty
Time required
 15 minutes or less
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 replace this tiny but essential part.

Repair difficulty
Time required
 45 minutes or less

Articles and videos common to all 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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