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MTD 21AA404B031 rear-tine tiller

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.

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Browse Parts for 21AA404B031 Tillers

  • 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
    $27.80
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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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  • Lawn & Garden Equipment Knob for MTD 21AA404B031 - Part 712-0421

    Handle & tine shield diagram

    Tiller Wing Nut

    Part #712-0421

    Replaced by #712-0421

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    Manufacturer substitution
    This part replaces 712-0421. Substitute parts can look different from the original.
    This item is not returnable
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    $2.90
    26% OFF Phone Price : $3.90Info Icon
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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.
    This item is not returnable
    In Stock
    $7.86
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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
    $41.87
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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
    $49.51
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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
    $40.27
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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
    $339.58
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  • Mtd Tiller Drive Belt for MTD 21AA404B031 - Part 954-04090

    Drive system diagram

    Belt

    Part #1916657

    Replaced by #954-04090

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    Manufacturer substitution
    This part replaces 1916657. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $28.29
    17% OFF Phone Price : $34.29Info Icon
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  • Yard Machines Tiller Handle Adjustment Rod for MTD 21AA404B031 - Part 786-0340B

    Handle & tine shield diagram

    Crank Handle

    Part #786-0340A

    Replaced by #786-0340B

    Info Icon
    Manufacturer substitution
    This part replaces 786-0340A. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $27.47
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RECOMMENDED MAINTENANCE PARTS AND ACCESSORIES

High Pro Key 714-04059

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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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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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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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