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MTD 21A-450 rear tine gas tiller Parts

Here are the diagrams and repair parts for MTD 21A-450 rear tine gas tiller, as well as links to manuals and error code tables, if available.

MTD 21A-450 rear tine gas tiller
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Browse Parts for 21A-450 Tillers

  • Tiller Handle Plug for MTD 21A-450 - Part 735-0246A

    Handle/tine adapter/shield diagram

    Plug-vinyl E

    Part #735-0246

    Replaced by #735-0246A

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    Manufacturer substitution
    This part replaces 735-0246. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $10.51
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  • Belt Cover for MTD 21A-450 - Part 784-0158B

    Outer and inner engine pulley/wheels diagram

    Tiller Belt Cover

    Part #784-0158A

    Replaced by #784-0158B

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    Manufacturer substitution
    This part replaces 784-0158A. Substitute parts can look different from the original.
    In Stock
    $110.09
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  • Tiller Bearing for MTD 21A-450 - Part 741-0421B

    Gear case assembly diagram

    Tiller Bearing

    Part #741-0421

    Replaced by #741-0421B

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    Manufacturer substitution
    This part replaces 741-0421. Substitute parts can look different from the original.
    In Stock
    $30.40
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  • Bracket Tine for MTD 21A-450 - Part 786-0179-0637

    Handle/tine adapter/shield diagram

    Bracket Tine

    Part #786-0179

    Replaced by #786-0179-0637

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    Manufacturer substitution
    This part replaces 786-0179. Substitute parts can look different from the original.
    In Stock
    $107.70
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  • Counterweigh for MTD 21A-450 - Part 723P0381

    Outer and inner engine pulley/wheels diagram

    Tiller Counterweight, 40-lb

    Part #723-0381

    Replaced by #723P0381

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    Manufacturer substitution
    This part replaces 723-0381. Substitute parts can look different from the original.
    In Stock
    $219.31
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  • Gear Asm-rev for MTD 21A-450 - Part 617-0058A

    Gear case assembly diagram

    Gear Assembly

    Part #617-0058

    Replaced by #617-0058A

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    Manufacturer substitution
    This part replaces 617-0058. Substitute parts can look different from the original.
    In Stock
    $108.31
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  • Tiller Spacer for MTD 21A-450 - Part 950-0671

    Gear case assembly diagram

    Spacer

    Part #750-0671

    Replaced by #950-0671

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    Manufacturer substitution
    This part replaces 750-0671. Substitute parts can look different from the original.
    In Stock
    $21.00
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  • Tiller Input Shaft for MTD 21A-450 - Part 711-1349B

    Gear case assembly diagram

    Input Shaft

    Part #711-1349

    Replaced by #711-1349B

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    Manufacturer substitution
    This part replaces 711-1349. Substitute parts can look different from the original.
    In Stock
    $111.14
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  • Lawn Tractor Tire Valve Stem for MTD 21A-450 - Part 934-0255

    Outer and inner engine pulley/wheels diagram

    Air Valve

    Part #734-0255

    Replaced by #934-0255

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    Manufacturer substitution
    This part replaces 734-0255. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $7.54
    12% OFF Phone Price : $8.54Info Icon
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  • Mtd Tiller Gear Case Shaft Spur Gear, 44-tooth for MTD 21A-450 - Part 717-1582B

    Gear case assembly diagram

    Spur Gear

    Part #717-1582

    Replaced by #717-1582B

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    Manufacturer substitution
    This part replaces 717-1582. Substitute parts can look different from the original.
    In Stock
    $75.44
    47% OFF Was : $141.39Info Icon
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Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

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Why does my tiller's engine leak oil or gas?

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

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Why does my tiller's engine run roughly or misfire?

Main causes: dirty carburetor, engine needs tune up, stale gas…

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Why won't my tiller's engine start?

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

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Why do my tiller's wheels turn but the tines don't?

Main causes: broken shaft clevis pins, transmission failure…

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Why does my tiller turn the soil poorly?

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

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Why do my tiller's tines turn but the wheels don't?

Main causes: clutch cable problems, faulty transmission…

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Why won't my tillers wheels or tines turn?

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

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Most common repair guides to help fix your tillers

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

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How to replace a tiller recoil starter

How to replace a tiller recoil starter

The recoil starter spins the engine when you pull the starter rope, and the rope retracts when released. If the recoil s…

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Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your tillers

Use the advice and tips in these articles and videos to get the most out of your tiller.

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Fall garden care: to till or not to till? Here’s how to decide

Fall garden care: to till or not to till? Here’s how to decide

Thinking about tilling your garden this fall? Learn the pros and cons of fall tilling, when it makes sense, and how to p…

Read more
Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…

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Tiller common questions

Tiller common questions

These frequently asked questions might help you figure out what's wrong with your garden tiller.…

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