Sears
Cycling

Model # 512878630 Official Sears 16" sidewalk bicycle

Here are the diagrams and repair parts for Official Sears 512878630 16" sidewalk bicycle, 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 46 parts  |

Nut Hex 216-222A

#23

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Nut hex

Part #216-222A

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

Rear Wheel 6328-625

#35

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Rear wheel

Part #6328-625

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

Washer 3780A-665

#7

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Washer

Part #3780A-665

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

Hndlbr Collr 219-10A

#3

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Hndlbr collr

Part #219-10A

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

Tire 215-316

#86

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Tire

Part #215-316

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

Seat 221-765

#44

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Seat

Part #221-765

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

Sprocket 1-29868-701

#24

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Sprocket

Part #1-29868-701

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

Clamp Hndlbr 219-1112

#43

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Clamp hndlbr

Part #219-1112

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

Screw 216-3866A

#4

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Screw

Part #216-3866A

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

Wheel 241-53

#63

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Wheel

Part #241-53

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

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

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

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

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 transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…

Repair difficulty
Time required
 60 minutes or less
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 ignition coil on a flathead engine

How to replace a lawn mower ignition coil on a flathead engine

If the spark plug doesn't fire when you try to start the mower, you could have a defective ignition coil. Follow these s…

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.

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

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

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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…

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.…