Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Snapper
Rear-Engine Riding Mower

Model # M300921B Official Snapper rear-engine riding lawn mower

Here are the diagrams and repair parts for Official Snapper M300921B rear-engine riding lawn mower, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

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

Fuel tank & operation seat diagram

Filter

Part #1-4359

Replaced by #394358S

?
Manufacturer substitution
This part replaces 1-4359. Substitute parts can look different from the original.
BEST SELLER
$6.67 | 
13% OFF Phone Price : $7.67
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
Washer 9/32" Flat 9-0055
Washer 9/32" flat

Part #9-0055

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

Thrust Washer 3-1079
#4

Differential, r.h. fender diagram

Thrust washer

Part #3-1079

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

Bolt, 3/8-24 X 9/16" Shoulder 1-5446
#5

Blade stop pedals diagram

Bolt, 3/8-24 x 9/16" shoulder

Part #1-5446

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

Chain 1-0941
Chain

Part #1-0941

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

30" Blade 1-8069
#27D

Cutting decks, deflectors diagram

30" blade

Part #1-8069

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

Deca, Caution (rotating Blades) 1-6973
#31

Decals diagram

Deca, caution (rotating blades)

Part #1-6973

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

Pulley , Seam Welded Idler 2-9624
#3

Belts, brakes, interlock diagram

Pulley , seam welded idler

Part #2-9624

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

Cable Connector 3-4174
#37

Front end steering diagram

Cable connector

Part #3-4174

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 cut grass?

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

Read more

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

Main causes: faulty battery, bad alternator…

Read more

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

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

Read more

Why won't my riding mower start?

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

Read more

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…

Read more

Why does my riding mower creep in neutral?

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

Read more

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…

Read more

Why won't my riding mower move?

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

Read more

Why is my riding mower not cutting evenly?

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…

Read more

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.

View all
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.…

Read more
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…

Read more
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.

View all
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.…

Read more
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.…

Read more
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.…

Read more

Parts & More