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MTD 12A-979L402 lawn mower Parts
Here are the diagrams and repair parts for MTD 12A-979L402 lawn mower, as well as links to manuals and error code tables, if available.
Owner’s manual
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Browse Parts for 12A-979L402 Walk-Behind Mowers
Chain/pulley/rear axle/bag diagram
Mtd Lawn Tractor Screw (710-0642)
Part #710-0642This item is not returnableIn Stock$6.7413% OFF Phone Price : $7.74
Qty
21" deck/handle/front axle cover diagram
Lawn Mower Axle Bushing
In Stock$11.3015% OFF Phone Price : $13.30QtyChain/pulley/rear axle/bag diagram
Lawn & Garden Equipment Hex Screw
Part #710-0299This item is not returnableIn Stock$8.29QtyChain/pulley/rear axle/bag diagram
Pivot Arm
Part #682-0531Replaced by #682-0531-0637
Manufacturer substitutionThis part replaces 682-0531. Substitute parts can look different from the original.In Stock$68.60QtyRatchet
Part #748-0318Replaced by #948-0318
Manufacturer substitutionThis part replaces 748-0318. Substitute parts can look different from the original.This item is not returnableIn Stock$19.919% OFF Phone Price : $21.91QtyChain/pulley/rear axle/bag diagram
Thrust Washer
Part #736-0616Replaced by #936-0616
Manufacturer substitutionThis part replaces 736-0616. Substitute parts can look different from the original.This item is not returnableIn Stock$8.43Qty21" deck/handle/front axle cover diagram
Shift Lever
Part #732-0627Replaced by #732-0627A
Manufacturer substitutionThis part replaces 732-0627. Substitute parts can look different from the original.This item is not returnableIn Stock$14.26QtyChain/pulley/rear axle/bag diagram
Oil Seal
Part #721-0329Replaced by #921-0329
Manufacturer substitutionThis part replaces 721-0329. Substitute parts can look different from the original.In Stock$18.71Qty21" deck/handle/front axle cover diagram
Grip
Part #720-0294Replaced by #720-0294A
Manufacturer substitutionThis part replaces 720-0294. Substitute parts can look different from the original.This item is not returnableIn Stock$13.46Qty21" deck/handle/front axle cover diagram
Door-chute T
Part #731-1874Replaced by #731-1874A
Manufacturer substitutionThis part replaces 731-1874. Substitute parts can look different from the original.This item is not returnableIn Stock$50.22Qty
Most common symptoms to help you fix your 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: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…
Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…
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 front deck tray
Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…
Repair time and Difficulty
60 minutes or less
How to replace a lawn mower transmission
Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…
Repair time and Difficulty
60 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 time and Difficulty
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.
Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…
See a comparison of cordless lawn mowers and gas mowers so you can decide which is best for you.…
Learn about a new feature added to the Search Bar on Sears PartsDirect…
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