Free standard ground shipping within the 48 contiguous states with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number

MTD 21AA414A729 rear-tine tiller Parts

Here are the diagrams and repair parts for MTD 21AA414A729 rear-tine tiller, as well as links to manuals and error code tables, if available.

MTD 21AA414A729 rear-tine tiller
By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for21AA414A729 Tillers

  • Sprocket Gear for MTD 21AA414A729 - Part 617-0003

    Gear case diagram

    Sprocket Gear

    Part #617-0003

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

  • Cable Bracket for MTD 21AA414A729 - Part 786-0107

    Wheels/tine diagram

    Cable Bracket

    Part #786-0107

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

  • Cover Bracket for MTD 21AA414A729 - Part 786-0117

    Wheels/tine diagram

    Cover Bracket

    Part #786-0117

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

  • Gear Assembly for MTD 21AA414A729 - Part 617-0004

    Gear case diagram

    Gear Assembly

    Part #617-0004

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

  • Flat Washer for MTD 21AA414A729 - Part 736-0541

    Gear case diagram

    Flat Washer

    Part #736-0541

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

  • Gear Spur 17 for MTD 21AA414A729 - Part 717-1409

    Gear case diagram

    Gear Spur 17

    Part #717-1409

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

  • Bracket Assembly for MTD 21AA414A729 - Part 686-0043A

    Tine shield/handle diagram

    Bracket Assembly

    Part #686-0043A

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

  • Complete Wheel Assembly for MTD 21AA414A729 - Part 634-04233

    Wheels/tine diagram

    Complete Wheel Assembly

    Part #634-04233

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

  • Special Key for MTD 21AA414A729 - Part 718-0237

    Gear case diagram

    Special Key

    Part #718-0237

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

  • Button Plug for MTD 21AA414A729 - Part 726-0331

    Gear case diagram

    Button Plug

    Part #726-0331

    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.

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea...

Main causes: dirty carburetor, engine needs tune up, stale gas...

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter...

Main causes: broken shaft clevis pins, transmission failure...

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de...

Main causes: clutch cable problems, faulty transmission...

Main causes: worn or broken drive belts, bad transmission, clutch cable problems...

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.

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...

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.

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...

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....

Tiller common questions

Tiller common questions

These frequently asked questions might help you figure out what's wrong with your garden tiller....

Parts & More

Audio Equipment
Bottom-Mount Refrigerator
Compact Refrigerator
Dryer
Gas Pressure Washer
Gas Walk-Behind Mower
Microwave
Parts
Rear-Tine Tiller
Room Air Conditioner
Treadmill