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Snapper
Rear-Engine Riding Mower

Model # M280921B Official Snapper rear-engine riding lawn mower

Here are the diagrams and repair parts for Official Snapper M280921B rear-engine riding lawn mower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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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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ALL PARTS
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
$7.12 | 
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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
Screw, 5/16-24 X 1" Gr. 5 (4) 9-0238
#18

Smooth clutch diagram

Screw, 5/16-24 x 1" gr. 5 (4)

Part #9-0238

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

Spindle (10.237 Overall Length) 4-4785
#11

Spindle diagram

Spindle (10.237 overall length)

Part #4-4785

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

Bolt, 1/4-20 X 1/2" Hex Fl. Lk., Gr. 5 9-0584
#26

Cutting decks, deflectors diagram

Bolt, 1/4-20 x 1/2" hex fl. lk., gr. 5

Part #9-0584

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

Pad, Clutch/brake Pedal 1-1815
#7

Front end steering diagram

Pad, clutch/brake pedal

Part #1-1815

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

Gear 11 Teeth 1-0964
#3

Differential, r.h. fender diagram

Gear 11 teeth

Part #1-0964

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

Sprocket & Shaft 1-8963
#6

Chain case, l.h. fender diagram

Sprocket & shaft

Part #1-8963

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

Gasket, Transmission Case 2-8762
#20

Differential, r.h. fender diagram

Gasket, transmission case

Part #2-8762

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

Lawn Sweeper (36") 6-1913

#NI24

All parts diagram

Lawn sweeper (36")

Part #6-1913

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.

View all

Why won't my riding mower start?

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

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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 deck vibrate?

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

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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 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 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 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 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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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 the seat on a riding lawn mower

How to replace the seat on a riding lawn mower

A broken seat can keep the mower from running.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower fuel filter

How to replace a riding lawn mower fuel filter

Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

Read more
Repair difficulty
Time required
 60 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 remove a lawn mower blade using a removal tool

How to remove a lawn mower blade using a removal tool

Learn how a blade removal tool makes replacing the blade easier and safer…

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Charging a battery in a riding lawn mower video

Charging a battery in a riding lawn mower video

Learn how to use a battery charger if your mower battery is dead.…

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Riding mower and tractor common questions

Riding mower and tractor common questions

You might find the answers to your questions about your riding mower or lawn tractor in this list of frequently asked qu…

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