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Model # 11A-546A766 Official Troybilt 21" mulching lawn mower
Here are the diagrams and repair parts for Official Troybilt 11A-546A766 21" mulching lawn mower, as well as links to manuals and error code tables, if available.
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11A-546A766 Walk-Behind Mowers
#56
Mower assembly diagram
Blade-21" mu
Part #742-0741
Replaced by #942-0741A
?
Manufacturer substitution
This part replaces 742-0741. Substitute parts can look different from the original.
Get free shipping with Automatic Reorder
$27.71 |
18% OFF Phone Price : $33.71
In Stock
#57
Mower assembly diagram
Bell support
Part #736-0524A
Replaced by #736-0524B-1
?
Manufacturer substitution
This part replaces 736-0524A. Substitute parts can look different from the original.
Get free shipping with Automatic Reorder
$6.58 |
13% OFF Phone Price : $7.58
In Stock
#29
Mower assembly diagram
Lawn tractor screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)
Part #710-0599
This item is not returnable
$4.91 |
17% OFF Phone Price : $5.91
In Stock
#52
Mower assembly diagram
Hinge pin
Part #747-0710
Replaced by #747-0710A
?
Manufacturer substitution
This part replaces 747-0710. Substitute parts can look different from the original.
This item is not returnable
$4.76 |
17% OFF Phone Price : $5.76
In Stock
#45
Mower assembly diagram
Wing nut
Part #712-0397
Replaced by #712-0397A
?
Manufacturer substitution
This part replaces 712-0397. Substitute parts can look different from the original.
This item is not returnable
$5.22 |
16% OFF Phone Price : $6.22
In Stock
#34
Mower assembly diagram
Lawn & garden equipment carriage bolt (replaces 1186069, 583108, 706-101080, 706-10602-12, 791-182213)
Part #710-0703
This item is not returnable
$6.46 |
13% OFF Phone Price : $7.46
In Stock
#32
Mower assembly diagram
Yard machines lawn & garden equipment screw
Part #710-1017
This item is not returnable
$12.71 |
14% OFF Phone Price : $14.71
In Stock
#6
Mower assembly diagram
Yard machines lawn & garden equipment wing nut (replaces 01002925, 920-0279)
Part #720-0279
This item is not returnable
$6.87 |
13% OFF Phone Price : $7.87
In Stock
#65
Mower assembly diagram
Lawn mower deflector shield (replaces 931-04177)
Part #731-04177
This item is not returnable
$25.96 |
19% OFF Phone Price : $31.96
In Stock
#13
Mower assembly diagram
Grsbg 21" 40
Part #664-04011
Replaced by #964-04007A
?
Manufacturer substitution
This part replaces 664-04011. Substitute parts can look different from the original.
$143.25 |
8% OFF Phone Price : $155.25
In Stock
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
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
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 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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Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
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Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…
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Get answers to frequently asked questions about Sears and Sears PartsDirect.…