Gas Walk-Behind Mower

Model # 12AV556O711 Official Troybilt lawn mower

Here are the diagrams and repair parts for Official Troybilt 12AV556O711 lawn mower, as well as links to manuals and error code tables, if available.

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12AV556O711 Walk-Behind Mowers
Blade-21" Mu 742-0741
Blade-21" mu

Part #742-0741

Replaced by #942-0741A

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Manufacturer substitution
This part replaces 742-0741. Substitute parts can look different from the original.
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$28.54
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Yard Machines Lawn Tractor Flange Nut (replaces 00012173, Wd-129-103) 712-04065
Yard machines lawn tractor flange nut (replaces 00012173, wd-129-103)

Part #712-04065

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This item is not returnable
$5.27
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Cable  37.37 746-1113
#12

Pulleys/blade/handle diagram

Cable 37.37

Part #746-1113

Replaced by #946-1113A

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Manufacturer substitution
This part replaces 746-1113. Substitute parts can look different from the original.
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$22.85
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Torsion Spring 732-1014
#34

Wheel assembly/mulch plug diagram

Torsion spring

Part #732-1014

Replaced by #732-1014C

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Manufacturer substitution
This part replaces 732-1014. Substitute parts can look different from the original.
$9.11
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Sears Lawn Tractor Lock Nut (replaces 912-0214) 712-0214
Sears lawn tractor lock nut (replaces 912-0214)

Part #712-0214

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Bail 747-1161A
Bail

Part #747-1161A

Replaced by #747-1161A-0637

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Manufacturer substitution
This part replaces 747-1161A. Substitute parts can look different from the original.
This item is not returnable
$20.10
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Yard Machines Lawn & Garden Equipment Cupped Washer 736-0270
#30

Wheel assembly/mulch plug diagram

Yard machines lawn & garden equipment cupped washer

Part #736-0270

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$5.10
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Lawn & Garden Equipment Hex Bolt (replaces 01000943, 910-1257) 710-1257
Lawn & garden equipment hex bolt (replaces 01000943, 910-1257)

Part #710-1257

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$9.85
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Cable Tie 726-0240
Cable tie

Part #726-0240

Replaced by #726-0178

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Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
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Lawn Mower Wheel 734-04018A
Lawn mower wheel

Part #734-04018A

Replaced by #734-04018C

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Manufacturer substitution
This part replaces 734-04018A. Substitute parts can look different from the original.
This item is not returnable
$25.87
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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.

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.…