Homelite
Gas Walk-Behind Mower

Model # SB21P4E Official Homelite lawn mower

Here are the diagrams and repair parts for Official Homelite SB21P4E 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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Showing 10 of 153 parts  |

Screw JA-40887-6
#21

Figure 1 diagram

Screw

Part #JA-40887-6

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

Gear JA-99277-0
#13

Figure 4 diagram

Gear

Part #JA-99277-0

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

Clamp JA-99106-5
#31

Figure 2 diagram

Clamp

Part #JA-99106-5

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

Wheel&tire C JA-16159-6
#46

Figure 1 diagram

Wheel&tire c

Part #JA-16159-6

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

Screw JA-40358-6
#27

Figure 2 diagram

Screw

Part #JA-40358-6

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

Support Assembly JA-99007-4
#44

Figure 1 diagram

Support assembly

Part #JA-99007-4

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

Screw JA-40990-8
#32

Figure 2 diagram

Screw

Part #JA-40990-8

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

Walk-behind Lawn Mower Engine JA-99127-4
#18

Figure 1 diagram

Walk-behind lawn mower engine

Part #JA-99127-4

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

Cover JA-99122-2
#39

Figure 1 diagram

Cover

Part #JA-99122-2

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

Flap JA-35925-7
#31

Figure 1 diagram

Flap

Part #JA-35925-7

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.

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

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

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

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

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

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

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 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…

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

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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.

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

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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

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Top questions about Sears and Sears PartsDirect

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