Bolens
Gas Walk-Behind Mower

Model #12A-446T163 Official Bolens lawn mower

Here are the diagrams and repair parts for Bolens 12A-446T163 lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual
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Parts List

Showing 10 of 85 parts

Free Shipping Lawn Mower 21-in Deck Mulching Blade (replaces 01002810, 742-0741A, 942-04276, 942-0741)#62

21" rear-discharge mower 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.
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In Stock
$27.31 | 
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Phone Price: $32.31
Lawn Mower Handle Knob (replaces 01000382, 113589, 720-04072, 720-04125)#12

21" rear-discharge mower Diagram

Knob wing nut

Part #720-0284
Replaced by #720-04072A
?
Manufacturer substitution
This part replaces 720-0284. Substitute parts can look different from the original.
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This item is not returnable
In Stock
$5.77 | 
48% OFF 
MSRP: $11.00
Lawn & Garden Equipment Carriage Bolt (replaces 1186069, 583108, 706-101080, 706-10602-12, 791-182213)#93

21" rear-discharge mower Diagram

In Stock
$6.46 | 
13% OFF 
Phone Price: $7.46
Lawn Mower Ground Drive Belt, 3/8 x 31-1/4-in#42

21" rear-discharge mower Diagram

V-belt

Part #754-0637
Replaced by #954-0637A
?
Manufacturer substitution
This part replaces 754-0637. Substitute parts can look different from the original.
This item is not returnable

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In Stock
$17.69 | 
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Phone Price: $19.69
Lawn & Garden Equipment Hex Lock Nut

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Nut

Part #712-0431
Replaced by #912-0431
?
Manufacturer substitution
This part replaces 712-0431. Substitute parts can look different from the original.
This item is not returnable
In Stock
$7.57 | 
12% OFF 
Phone Price: $8.57
Lawn & Garden Equipment Shoulder Screw#97

21" rear-discharge mower Diagram

Lawn & garden equipment shoulder screw

Part #710-1650
This item is not returnable
In Stock
$5.95 | 
14% OFF 
Phone Price: $6.95
Lawn Mower Throttle Control Housing#5

21" rear-discharge mower Diagram

Lawn mower throttle control housing

Part #746-0883
This item is not returnable
In Stock
$21.96 | 
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Phone Price: $26.96
Lawn & Garden Equipment Screw#28

21" rear-discharge mower Diagram

Lawn & garden equipment screw

Part #710-1017
This item is not returnable
In Stock
$12.71 | 
14% OFF 
Phone Price: $14.71
Lawn Tractor Cable Tie (replaces 725-0157, 926-0240, GW-H212980)#39

21" rear-discharge mower Diagram

Cable tie

Part #726-0240
Replaced by #726-0178
?
Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16
Lawn Mower Drive Pinion Gear#66A

21" rear-discharge mower Diagram

Lawn mower drive pinion gear

Part #717-1761
This item is not returnable
In Stock
$22.26

Symptoms for gas walk-behind mowers

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

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: 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: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

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 cracked.

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 replace this tiny but essential part.

Repair difficulty
Time required
 45 minutes or less

Articles and videos common to all 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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Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect