MTD
Gas Walk-Behind Mower

Model # 12A-A26B793 (2021) Official MTD m220 lawn mower

Here are the diagrams and repair parts for Official MTD 12A-A26B793-2021 m220 lawn mower, 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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Model diagram and schematic

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Craftsman Troybilt Lawn Mower 21-in Deck Mulching Blade (replaces 01002810, 742-0741a, 942-04276, 942-0741) 942-0741A
#NI

Quick reference/axles/blade diagram

Craftsman troybilt lawn mower 21-in deck mulching blade (replaces 01002810, 742-0741a, 942-04276, 942-0741)

Part #942-0741A

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Air Filter BS-593260
#NI

Quick reference/axles/blade diagram

Air filter

Part #BS-593260

Replaced by #593260

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Manufacturer substitution
This part replaces BS-593260. Substitute parts can look different from the original.
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Lawn Mower Zone Control Cable (replaces 946-04728) 946-04728A
Lawn mower zone control cable (replaces 946-04728)

Part #946-04728A

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Lawn Mower Rear Skirt 731-07203
Lawn mower rear skirt

Part #731-07203

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Yard Machines Lawn & Garden Equipment Nut 712-04064
#NI

Grassbag/handle/height adjustment knob diagram

Yard machines lawn & garden equipment nut

Part #712-04064

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This item is not returnable
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Lawn Mower Lower Handle Knob (replaces 720-05066) 720-05066A
#NI

Grassbag/handle/height adjustment knob diagram

Lawn mower lower handle knob (replaces 720-05066)

Part #720-05066A

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Craftsman Lawn Mower Axle Assembly, Rear (replaces 911-04142a) 611-04142A
#NI

Quick reference/axles/blade diagram

Craftsman lawn mower axle assembly, rear (replaces 911-04142a)

Part #611-04142A

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Lawn Mower Zone Control Cable (replaces 946-1113) 946-1113A
Lawn mower zone control cable (replaces 946-1113)

Part #946-1113A

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Lawn Mower Grass Bag (replaces 664p05321) 664P05321A
Lawn mower grass bag (replaces 664p05321)

Part #664P05321A

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Lawn  Mower 21-in Deck Xtreme Mulching Blade 942-0741-X
#NI

Quick reference/axles/blade diagram

Lawn mower 21-in deck xtreme mulching blade

Part #942-0741-X

Replaced by #742P0741-X

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Manufacturer substitution
This part replaces 942-0741-X. Substitute parts can look different from the original.
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Symptoms for gas walk-behind mowers

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

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

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

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…

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 blade

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

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…

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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