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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 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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  • Shield for MTD 21A-450 - Part 786-0113A

    Handle/tine adapter/shield diagram

    Tine Shield

    Part #786-0113

    Replaced by #786-0113A

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    Manufacturer substitution
    This part replaces 786-0113. Substitute parts can look different from the original.
    In Stock
    $104.53
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  • Tiller Tire for MTD 21A-450 - Part 734-0808A

    Outer and inner engine pulley/wheels diagram

    14"tler Tire

    Part #734-0808

    Replaced by #734-0808A

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    Manufacturer substitution
    This part replaces 734-0808. Substitute parts can look different from the original.
    In Stock
    $129.16
    9% OFF Phone Price : $141.16Info Icon
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  • Mtd Lawn & Garden Equipment Hex Nut for MTD 21A-450 - Part 712-3010

    Outer and inner engine pulley/wheels diagram

    Hex Nut

    Part #712-0267

    Replaced by #712-3010

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    Manufacturer substitution
    This part replaces 712-0267. Substitute parts can look different from the original.
    In Stock
    $55.59
    10% OFF Phone Price : $61.59Info Icon
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  • Tiller Drive Belt for MTD 21A-450 - Part 954-0434

    Outer and inner engine pulley/wheels diagram

    Belt-v 1/2x5

    Part #754-0434

    Replaced by #954-0434

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    Manufacturer substitution
    This part replaces 754-0434. Substitute parts can look different from the original.
    Get free shipping with Automatic Reorder
    In Stock
    $68.47
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  • Tiller Control Cable for MTD 21A-450 - Part 946-1117

    Outer and inner engine pulley/wheels diagram

    Tiller Clutch Cable

    Part #746-1117

    Replaced by #946-1117

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    Manufacturer substitution
    This part replaces 746-1117. Substitute parts can look different from the original.
    In Stock
    $89.15
    6% OFF Phone Price : $95.15Info Icon
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  • 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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  • Tiller Side Cover for MTD 21A-450 - Part 686-0044B

    Handle/tine adapter/shield diagram

    Cover Assy-e

    Part #686-0044A

    Replaced by #686-0044B

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    Manufacturer substitution
    This part replaces 686-0044A. Substitute parts can look different from the original.
    In Stock
    $97.31
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  • Lawn & Garden Equipment Flat Washer for MTD 21A-450 - Part 936-0326

    Outer and inner engine pulley/wheels diagram

    Washer

    Part #736-0326

    Replaced by #936-0326

    Info Icon
    Manufacturer substitution
    This part replaces 736-0326. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $30.50
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    Qty
    Plus Item
  • Tiller Spacer for MTD 21A-450 - Part 950-0570

    Gear case assembly diagram

    Spacer

    Part #750-0570

    Replaced by #950-0570

    Info Icon
    Manufacturer substitution
    This part replaces 750-0570. Substitute parts can look different from the original.
    In Stock
    $18.49
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Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

View all

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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