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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

  • Gear Asm-rev for MTD 21AA45M5031 - Part 617-0058A

    Transmission 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 Drive Control Bar for MTD 21AA45M5031 - Part 747-1219A-0637

    Handle & tine shield diagram

    Clutch Bail

    Part #747-1219-0637

    Replaced by #747-1219A-0637

    Info Icon
    Manufacturer substitution
    This part replaces 747-1219-0637. Substitute parts can look different from the original.
    In Stock
    $46.76
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  • Tiller Idler Pulley for MTD 21AA45M5031 - Part 917-0059B

    Transmission assembly diagram

    Tiller Idler Pulley

    Part #617-0059

    Replaced by #917-0059B

    Info Icon
    Manufacturer substitution
    This part replaces 617-0059. Substitute parts can look different from the original.
    In Stock
    $145.85
    8% OFF Phone Price : $157.85Info Icon
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  • Mtd Tiller Belt Guard for MTD 21AA45M5031 - Part 784-0158B-0691

    Drive system diagram

    Belt Cover

    Part #784-0158A-0662

    Replaced by #784-0158B-0691

    Info Icon
    Manufacturer substitution
    This part replaces 784-0158A-0662. Substitute parts can look different from the original.
    In Stock
    $138.68
    8% OFF Phone Price : $150.68Info Icon
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  • Mtd Lawn & Garden Equipment Hex Nut for MTD 21AA45M5031 - Part 712-3010

    Drive system diagram

    Lawn & Garden Equipment Hex Nut

    Part #912-3010

    Replaced by #712-3010

    Info Icon
    Manufacturer substitution
    This part replaces 912-3010. Substitute parts can look different from the original.
    In Stock
    $55.59
    10% OFF Phone Price : $61.59Info Icon
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  • Tiller Bearing for MTD 21AA45M5031 - Part 741-0421B

    Transmission assembly diagram

    Tiller Bearing

    Part #741-0421

    Replaced by #741-0421B

    Info Icon
    Manufacturer substitution
    This part replaces 741-0421. Substitute parts can look different from the original.
    In Stock
    $30.40
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  • Case Assembly for MTD 21AA45M5031 - Part 986-04074A

    Drive system diagram

    Case Assembly

    Part #986-04074A

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

  • Lawn & Garden Equipment Screw for MTD 21AA45M5031 - Part 710-0805A

    Drive system diagram

    Lawn Tractor Hex Bolt

    Part #710-0805

    Replaced by #710-0805A

    Info Icon
    Manufacturer substitution
    This part replaces 710-0805. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $7.86
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    Qty
    Plus Item
  • Mtd Lawn & Garden Equipment Pal Nut for MTD 21AA45M5031 - Part 726-0106

    Handle & tine shield diagram

    Lawn & Garden Equipment Push Cap Nut

    Part #926-0106

    Replaced by #726-0106

    Info Icon
    Manufacturer substitution
    This part replaces 926-0106. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $26.02
    Minus Item
    Qty
    Plus Item
  • Yard-man Tiller Flat Washer for MTD 21AA45M5031 - Part 736-0163

    Transmission assembly diagram

    Tiller Flat Washer

    Part #936-0163

    Replaced by #736-0163

    Info Icon
    Manufacturer substitution
    This part replaces 936-0163. Substitute parts can look different from the original.
    In Stock
    $29.79
    Minus Item
    Qty
    Plus Item

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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