MTD
Gas Walk-Behind Mower

Model # 12ABB22J799 Official MTD lawn mower

Here are the diagrams and repair parts for Official MTD 12ABB22J799 lawn mower, as well as links to manuals and error code tables, if available.

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Showing 10 of 199 parts  |

Troybilt Lawn Mower 21-in Deck Mulching Blade (replaces 01002810, 742-0741a, 942-04276, 942-0741) 942-0741A
#24

Lawn mower diagram

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

Part #942-0741A

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Lawn Mower Grass Bag 964-04154
#38

Lawn mower diagram

Lawn mower grass bag

Part #964-04154

Replaced by #964-04154B

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Manufacturer substitution
This part replaces 964-04154. Substitute parts can look different from the original.
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Lawn Mower Wheel, 8 X 2-in 634-05040
#17

Lawn mower diagram

Lawn mower wheel, 8 x 2-in

Part #634-05040

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Lawn Mower Rear Skirt 731-07203
#36

Lawn mower diagram

Lawn mower rear skirt

Part #731-07203

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Lawn Mower Grass Bag Frame (replaces 647-04271, 747-05226) 647-04271-0637
#39

Lawn mower diagram

Lawn mower grass bag frame (replaces 647-04271, 747-05226)

Part #647-04271-0637

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Yard Machines Lawn & Garden Equipment Nut 712-04064
#32

Lawn mower diagram

Yard machines lawn & garden equipment nut

Part #712-04064

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Lawn & Garden Equipment Belt 954-04260
#46

Lawn mower diagram

Lawn & garden equipment belt

Part #954-04260

Replaced by #490-501-Y005

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This part replaces 954-04260. Substitute parts can look different from the original.
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Lawn Mower Lower Handle Knob (replaces 720-05066) 720-05066A
#30

Lawn mower diagram

Lawn mower lower handle knob (replaces 720-05066)

Part #720-05066A

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Lawn Mower Wheel (replaces 634-04630) 634-05062
#33

Lawn mower diagram

Lawn mower wheel (replaces 634-04630)

Part #634-05062

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Walk-behind Lawn Mower Drive Cable 946-05209
#42

Lawn mower diagram

Walk-behind lawn mower drive cable

Part #946-05209

Replaced by #946-05209B

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This part replaces 946-05209. 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.

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

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