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MTD 21AA45M5031 rear-tine tiller Parts

Here are the diagrams and repair parts for MTD 21AA45M5031 rear-tine tiller, as well as links to manuals and error code tables, if available.

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MTD 21AA45M5031 rear-tine tiller
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Browse Parts for 21AA45M5031 Tillers

  • Lawn Tractor Snowblower Attachment Hex Nut for MTD 21AA45M5031 - Part 712-0206

    Handle & tine shield diagram

    Lawn & Garden Equipment Hex Nut

    Part #912-0206

    Replaced by #712-0206

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    Manufacturer substitution
    This part replaces 912-0206. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.82
    26% OFF Phone Price : $3.82Info Icon
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  • Mtd Tiller Gear Case Shaft Spur Gear, 44-tooth for MTD 21AA45M5031 - Part 717-1582B

    Transmission 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
    $141.39
    8% OFF Phone Price : $153.39Info Icon
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  • Tiller Input Shaft for MTD 21AA45M5031 - Part 711-1349B

    Transmission 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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  • Ryobi Lawn & Garden Equipment Lock Washer for MTD 21AA45M5031 - Part 736-0921

    Handle & tine shield diagram

    Lawn & Garden Equipment Lock Washer

    Part #936-0921

    Replaced by #736-0921

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    Manufacturer substitution
    This part replaces 936-0921. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $8.20
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  • Tiller Nut for MTD 21AA45M5031 - Part 738-0876A

    Drive system diagram

    Nut Shield

    Part #938-0876

    Replaced by #738-0876A

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    Manufacturer substitution
    This part replaces 938-0876. Substitute parts can look different from the original.
    This item is not returnable
    Check Availability
    $19.80
    9% OFF Phone Price : $21.80Info Icon
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  • Belt Cover Bracket Assembly for MTD 21AA45M5031 - Part 686-0111

    Drive system diagram

    Tiller Bracket Assembly

    Part #686-0111-0637

    Replaced by #686-0111

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    Manufacturer substitution
    This part replaces 686-0111-0637. Substitute parts can look different from the original.
    In Stock
    $34.66
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  • Craftsman Lawn Tractor Snowblower Attachment Hex Screw for MTD 21AA45M5031 - Part 710-0653

    Drive system diagram

    Lawn & Garden Equipment Screw

    Part #710-0653

    Replaced by #710-0653

    Info Icon
    Manufacturer substitution
    This part replaces 710-0653. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.74
    27% OFF Phone Price : $3.74Info Icon
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  • Gear Assembly for MTD 21AA45M5031 - Part 617-0062A

    Transmission assembly diagram

    Gear Assembly

    Part #617-0062

    Replaced by #617-0062A

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    Manufacturer substitution
    This part replaces 617-0062. Substitute parts can look different from the original.
    In Stock
    $160.96
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  • Lawn & Garden Equipment Flat Washer for MTD 21AA45M5031 - Part 936-0351

    Transmission assembly diagram

    Lawn & Garden Equipment Flat Washer

    Part #936-0351

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

  • Tiller Shaft Assembly for MTD 21AA45M5031 - Part 611-0128

    Transmission assembly diagram

    Tiller Shaft Assembly

    Part #611-0128

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

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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