Gas Walk-Behind Mower

Model # 12AVB2M5791 Official MTD gas lawn mower

Here are the diagrams and repair parts for Official MTD 12AVB2M5791 gas lawn mower, as well as links to manuals and error code tables, if available.

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Browse Parts for12AVB2M5791 Walk-Behind Mowers

  • Craftsman Troybilt Lawn Mower 21-in Deck Mulching Blade 942-0741A
    #NI03

    Lawn mower diagram

    Craftsman troybilt lawn mower 21-in deck mulching blade

    Part #942-0741A

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    $28.54
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  • Mtd Lawn Mower Wheel, 8 X 2-in 634-05040
    #NI16

    Lawn mower diagram

    Mtd lawn mower wheel, 8 x 2-in

    Part #634-05040

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    $43.09
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  • Mtd Lawn Mower Rear Skirt 731-07203
    #NI15

    Lawn mower diagram

    Mtd lawn mower rear skirt

    Part #731-07203

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    $14.90
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  • Mtd Lawn Mower Deflector Shield 731-07131
    #NI09

    Lawn mower diagram

    Mtd lawn mower deflector shield

    Part #731-07131

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    $22.55
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  • Mtd Lawn Mower Grass Bag Frame 647-04271-0637
    #NI11

    Lawn mower diagram

    Mtd lawn mower grass bag frame

    Part #647-04271-0637

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    $44.18
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  • Mtd Lawn & Garden Equipment Hex Bolt, 3/8-24 X 1-1/2-in 710-1044
    #NI06

    Lawn mower diagram

    Mtd lawn & garden equipment hex bolt, 3/8-24 x 1-1/2-in

    Part #710-1044

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    $5.33
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  • Lawn Mower Grass Bag 664P05322
    #NI12

    Lawn mower diagram

    Lawn mower grass bag

    Part #664P05322

    Replaced by #664P05322A

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    Manufacturer substitution
    This part replaces 664P05322. Substitute parts can look different from the original.
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    $46.14
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  • Lawn & Garden Equipment Belt 954-04260
    #NI02

    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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    $29.24
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  • Mtd Lawn Mower Wheel 634-05062
    #NI17

    Lawn mower diagram

    Mtd lawn mower wheel

    Part #634-05062

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    $46.73
    11% OFF Phone Price : $52.73
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  • Lawn  Mower 21-in Deck Xtreme Mulching Blade 942-0741-X
    #NI04

    Lawn mower 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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    $22.00
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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.

The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

Top 10 electric lawn and garden tools

Top 10 electric lawn and garden tools

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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.…