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Snapper
Rear-Engine Riding Mower

Model # WM280921B Official Snapper rear-engine riding lawn mower

Here are the diagrams and repair parts for Official Snapper WM280921B rear-engine riding lawn mower, as well as links to manuals and error code tables, if available.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

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Showing 10 of 462 parts  |
Filter 1-4359
#5

Fuel tank & operation seat diagram

Filter

Part #1-4359

Replaced by #394358S

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Manufacturer substitution
This part replaces 1-4359. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$6.47 | 
13% OFF Phone Price : $7.47
In Stock
Clamp 1-2222
#6

Fuel tank & operation seat diagram

Clamp

Part #1-2222

Replaced by #791850

?
Manufacturer substitution
This part replaces 1-2222. Substitute parts can look different from the original.
This item is not returnable
$4.74 | 
17% OFF Phone Price : $5.74
In Stock
Bushing, Nylon (2) 4-6158
#21

Front end steering diagram

Bushing, nylon (2)

Part #4-6158

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

Spacer, Pinion (4) 2-2115
#6

Differential, r.h. fender diagram

Spacer, pinion (4)

Part #2-2115

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

Gasket 2-8761
#3

Chain case, l.h. fender diagram

Gasket

Part #2-8761

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

Screw, #10-32 X 1" Hex Washer Self Tap 9-0299
Screw, #10-32 x 1" hex washer self tap

Part #9-0299

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

Slide Half (2) 1-4663
#29

Smooth clutch diagram

Slide half (2)

Part #1-4663

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

Nut, 5/8-32 Hex 1-5438
Nut, 5/8-32 hex

Part #1-5438

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

Ring, 1-13/16" External Retaining 1-0965
#14

Differential, r.h. fender diagram

Ring, 1-13/16" external retaining

Part #1-0965

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

Washer, 49/64 I.d. X 1-5/8" O.d. Thrust (30" Model) 1-1071
#24

Chain case, l.h. fender diagram

Washer, 49/64 i.d. x 1-5/8" o.d. thrust (30" model)

Part #1-1071

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

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

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How do I fix a flat tire on my riding mower?

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

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Why does my riding mower run rough or misfire?

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

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Why won't my riding mower move?

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

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Why is the steering loose on my riding mower?

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

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Why is my riding mower leaking oil or gas?

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

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Why does my riding mower creep in neutral?

Main causes: shift lever needs adjustment, neutral control needs adjustment…

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Why won't my riding mower cut grass?

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

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Why does my riding mower deck vibrate?

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

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How do I charge a dead battery on my riding mower?

Main causes: faulty battery, bad alternator…

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Most common repair guides to help fix your riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

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How to replace a mandrel assembly on a riding lawn mower

How to replace a mandrel assembly on a riding lawn mower

Replace the mandrel assembly if the blade shaft vibrates or doesn't spin.…

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Repair difficulty
Time required
 30 minutes or less
How to replace the flywheel key on a riding lawn mower

How to replace the flywheel key on a riding lawn mower

If the engine won't restart after hitting a stump or rock, the problem could be a sheared flywheel key. Follow these ste…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower ignition coil

How to replace a riding lawn mower ignition coil

If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…

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Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

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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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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…

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