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MTD 21AA404B031 rear-tine tiller Parts

Here are the diagrams and repair parts for MTD 21AA404B031 rear-tine tiller, as well as links to manuals and error code tables, if available.

MTD 21AA404B031 rear-tine tiller
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Browse Parts for21AA404B031 Tillers

  • Yard-man Lawn & Garden Equipment Screw for MTD 21AA404B031 - Part 738-0924A

    Drive system diagram

    Yard-man Lawn & Garden Equipment Screw

    Part #738-0924A
    This item is not returnable
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    $12.40
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  • Bail for MTD 21AA404B031 - Part 747-04789A-0637

    Handle & tine shield diagram

    Clutch Bail

    Part #747-04789-0637

    Replaced by #747-04789A-0637

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    Manufacturer substitution
    This part replaces 747-04789-0637. Substitute parts can look different from the original.
    In Stock
    $66.47
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  • Tine Shield for MTD 21AA404B031 - Part 786-04355A-0638

    Handle & tine shield diagram

    Tine Shield

    Part #786-04355-0638

    Replaced by #786-04355A-0638

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    Manufacturer substitution
    This part replaces 786-04355-0638. Substitute parts can look different from the original.
    In Stock
    $119.44
    9% OFF Phone Price : $131.44Info Icon
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  • Cover Powder for MTD 21AA404B031 - Part 786-04392-0637

    Transmission diagram

    Transmission Cover

    Part #786-04392

    Replaced by #786-04392-0637

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    Manufacturer substitution
    This part replaces 786-04392. Substitute parts can look different from the original.
    In Stock
    $52.41
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  • Bracket-dept for MTD 21AA404B031 - Part 786-04356A-0638

    Handle & tine shield diagram

    Adjustable Depth Bar

    Part #786-04356-0638

    Replaced by #786-04356A-0638

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    Manufacturer substitution
    This part replaces 786-04356-0638. Substitute parts can look different from the original.
    In Stock
    $98.68
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  • Lawn & Garden Equipment Screw for MTD 21AA404B031 - Part 710-1238A

    Handle & tine shield diagram

    Lawn & Garden Equipment Screw

    Part #710-1238

    Replaced by #710-1238A

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    Manufacturer substitution
    This part replaces 710-1238. Substitute parts can look different from the original.
    In Stock
    $30.75
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  • Housing Assembly for MTD 21AA404B031 - Part 919-04184A

    Transmission diagram

    Housing Transaxle

    Part #919-04184

    Replaced by #919-04184A

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    Manufacturer substitution
    This part replaces 919-04184. Substitute parts can look different from the original.
    In Stock
    $339.68
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  • Bracket-cabl for MTD 21AA404B031 - Part 786-04357A-0638

    Drive system diagram

    Bracket Pull

    Part #786-04357-0638

    Replaced by #786-04357A-0638

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    Manufacturer substitution
    This part replaces 786-04357-0638. Substitute parts can look different from the original.
    In Stock
    $40.38
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  • Cover for MTD 21AA404B031 - Part 731-06253B

    Handle & tine shield diagram

    Handle Cover

    Part #731-06253

    Replaced by #731-06253B

    Info Icon
    Manufacturer substitution
    This part replaces 731-06253. Substitute parts can look different from the original.
    In Stock
    $57.88
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  • Tiller Transmission Assembly for MTD 21AA404B031 - Part 918-04815A

    Transmission diagram

    Transmission Assembly

    Part #918-04815

    Replaced by #918-04815A

    Info Icon
    Manufacturer substitution
    This part replaces 918-04815. Substitute parts can look different from the original.
    In Stock
    $950.66
    $12.00 OFF Phone Price : $962.66Info Icon
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Part #714-04059
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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....

Read more

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