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Tecumseh TYPE 643-21A engine Parts

Here are the diagrams and repair parts for Tecumseh TYPE 643-21A engine, as well as links to manuals and error code tables, if available.

Tecumseh TYPE 643-21A engine
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Browse Parts for TYPE 643-21A Engine

  • Gasket for Tecumseh TYPE 643-21A - Part 510274

    Basic engine diagram

    Gasket

    Part #510274

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

  • Shttr Thrttl for Tecumseh TYPE 643-21A - Part 631621

    Carburetor diagram

    Shttr Thrttl

    Part #631621

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

  • Cylindr Head for Tecumseh TYPE 643-21A - Part 250240

    Basic engine diagram

    Cylindr Head

    Part #250240

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

  • Pump Element for Tecumseh TYPE 643-21A - Part 630953

    Carburetor diagram

    Pump Element

    Part #630953

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

  • Retainer for Tecumseh TYPE 643-21A - Part 510143

    Basic engine diagram

    Retainer

    Part #510143

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

  • O-ring for Tecumseh TYPE 643-21A - Part 631028

    Carburetor diagram

    O-ring

    Part #631028

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

  • Clip for Tecumseh TYPE 643-21A - Part 631022

    Carburetor diagram

    Clip

    Part #631022

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

  • Breaker Assembly for Tecumseh TYPE 643-21A - Part 30547A

    Magneto diagram

    Breaker Assembly

    Part #30547A

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

  • Gasket for Tecumseh TYPE 643-21A - Part 510282

    Basic engine diagram

    Gasket

    Part #510282

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

  • Bearing for Tecumseh TYPE 643-21A - Part 530143A

    Basic engine diagram

    Bearing

    Part #530143A

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

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Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

How to replace a treadmill walking board

How to replace a treadmill walking board

A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the…

Repair time and Difficulty

 30 minutes or less
How to replace a treadmill drive motor

How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn'…

Repair time and Difficulty

 15 minutes or less
How to replace a treadmill walking belt

How to replace a treadmill walking belt

A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using the…

Repair time and Difficulty

 45 minutes or less

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