Gas Walk-Behind Mower

Model # RP21400 Official Snapper lawn mower - series 0 & 1

Here are the diagrams and repair parts for Official Snapper RP21400 lawn mower - series 0 & 1, as well as links to manuals and error code tables, if available.

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RP21400 Walk-Behind Mowers
Hcln, 1/4c G 7090372
Hcln, 1/4c g

Part #7090372

Replaced by #703251

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$8.07
11% OFF Phone Price : $9.07
In Stock
Rhssnb, 1/4c 7091530
#18

Accessory-thatcherizer diagram

Rhssnb, 1/4c

Part #7091530

Replaced by #703101

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Manufacturer substitution
This part replaces 7091530. Substitute parts can look different from the original.
This item is not returnable
$6.89
13% OFF Phone Price : $7.89
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Key 7073406
#5

Electric start diagram

Key

Part #7073406

Replaced by #1717163SM

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Manufacturer substitution
This part replaces 7073406. Substitute parts can look different from the original.
This item is not returnable
$13.31
13% OFF Phone Price : $15.31
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Blade 7026407
Blade

Part #7026407

Replaced by #7026407AYP

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Manufacturer substitution
This part replaces 7026407. Substitute parts can look different from the original.

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In Stock
Hn, 5/16c Gr 7091511
Hn, 5/16c gr

Part #7091511

Replaced by #7091511SM

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Manufacturer substitution
This part replaces 7091511. Substitute parts can look different from the original.
This item is not returnable
In Stock
Retaining Ring 7010746
#22

Drive system self-propelled diagram

Retaining ring

Part #7010746

Replaced by #703975

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Manufacturer substitution
This part replaces 7010746. Substitute parts can look different from the original.
This item is not returnable
$6.69
13% OFF Phone Price : $7.69
In Stock
Blade 7026691
#14B

Cutting deck/blade/interlock diagram

Blade

Part #7026691

Replaced by #7026691BZYP

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Manufacturer substitution
This part replaces 7026691. Substitute parts can look different from the original.
This item is not returnable

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$27.69
18% OFF Phone Price : $33.69
In Stock
Hflb, 5/16c 7090595
Hflb, 5/16c

Part #7090595

Replaced by #703354

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Manufacturer substitution
This part replaces 7090595. Substitute parts can look different from the original.
This item is not returnable
$8.89
10% OFF Phone Price : $9.89
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Pushnut 1/4 7091020
Pushnut 1/4

Part #7091020

Replaced by #704005

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Manufacturer substitution
This part replaces 7091020. Substitute parts can look different from the original.
This item is not returnable
$7.29
12% OFF Phone Price : $8.29
In Stock
Slw, .318x.5 7090187
Slw, .318x.5

Part #7090187

Replaced by #5025170SM

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Manufacturer substitution
This part replaces 7090187. Substitute parts can look different from the original.
This item is not returnable
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Symptoms for gas walk-behind mowers

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

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

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

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

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

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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Repair difficulty
Time required
 15 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.

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.…

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.…

Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…