Cycling

Model # 502451651 Official Sears 20" bmx bicycle

Here are the diagrams and repair parts for Official Sears 502451651 20" bmx bicycle, as well as links to manuals and error code tables, if available.

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Browse Parts for
502451651 20" BMX Bicycle
F Axle Set 303518
#10

Unit parts diagram

F axle set

Part #303518

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

Wrench 6mm 300809

#NI

All parts diagram

Wrench 6mm

Part #300809

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

Tire 040005
Tire

Part #040005

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

Inner Tube 041003
Inner tube

Part #041003

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

Spk 7-9/16 303155
Spk 7-9/16

Part #303155

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

Reflector Kt 36056
#25

Unit parts diagram

Reflector kt

Part #36056

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

Stem Asm 37990PA
#5

Unit parts diagram

Stem asm

Part #37990PA

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

Bracket 32575Z
#26

Unit parts diagram

Bracket

Part #32575Z

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

Rear Wheel 303073CF-008
#20

Unit parts diagram

Rear wheel

Part #303073CF-008

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

Fork Asm 39548-700
#7

Unit parts diagram

Fork asm

Part #39548-700

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

Articles and videos for gas 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.…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…