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Kubota
Gas Walk-Behind Mower

Model # W5021-SC Official Kubota lawn mower

Here are the diagrams and repair parts for Official Kubota W5021-SC lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 400 parts  |
Knob 12681-6167-0
#130

Recoil starter diagram

Knob

Part #12681-6167-0

Replaced by #31-904

?
Manufacturer substitution
This part replaces 12681-6167-0. Substitute parts can look different from the original.
This item is not returnable
$3.80
In Stock
Ball Spring 65601-1232-0
#250

Transmission diagram

Ball spring

Part #65601-1232-0

The manufacturer no longer makes this part, and there's no substitute part

Drive Gear 12681-1686-0
#180

Rocker arm - camshaft diagram

Drive gear

Part #12681-1686-0

The manufacturer no longer makes this part, and there's no substitute part

Washer 65601-1226-0
#210

Transmission diagram

Washer

Part #65601-1226-0

The manufacturer no longer makes this part, and there's no substitute part

Bolt 65601-3523-0
#190

Blade brake clutch diagram

Bolt

Part #65601-3523-0

The manufacturer no longer makes this part, and there's no substitute part

Piston Pin 12681-2131-0
#30

Piston - crankshaft diagram

Piston pin

Part #12681-2131-0

The manufacturer no longer makes this part, and there's no substitute part

Pipe Knock 41071-1153-0
#40

Transmission diagram

Pipe knock

Part #41071-1153-0

The manufacturer no longer makes this part, and there's no substitute part

Chamber 12681-4473-0
#240

Carburetor (component parts) diagram

Chamber

Part #12681-4473-0

The manufacturer no longer makes this part, and there's no substitute part

Spring Pin 05411-0251-0
#170

Rocker arm - camshaft diagram

Spring pin

Part #05411-0251-0

The manufacturer no longer makes this part, and there's no substitute part

Gasket 12681-3312-0
#20

Oil filler pipe diagram

Gasket

Part #12681-3312-0

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

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

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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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.

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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…

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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. …

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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…

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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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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.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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