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MTD
Rear-Tine Tiller

Model # 21A-250M000 Official MTD rear-tine tiller

Here are the diagrams and repair parts for Official MTD 21A-250M000 rear-tine tiller, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 11 parts  |
Yard Machines Flange Screw 710-04398
#4

Rear tine tiller diagram

Yard machines flange screw

Part #710-04398

$22.37
In Stock
Yard Machines Tine Shield 786-04256
#18

Rear tine tiller diagram

Yard machines tine shield

Part #786-04256

$155.98
In Stock
Ace Retainer Ring 716-0208
#46

Rear tine tiller diagram

Ace retainer ring

Part #716-0208

$11.86
In Stock
Frame 786-04303
#11

Rear tine tiller diagram

Frame

Part #786-04303

$68.80
In Stock
Yard Machines Idler Pulley 756-04163
#6

Rear tine tiller diagram

Yard machines idler pulley

Part #756-04163

$59.53
In Stock
Clevis Pin 711-0415
#19

Rear tine tiller diagram

Clevis pin

Part #711-0415

$8.00
In Stock
Yard Machines Bracket:mt:c 786-04307
#44

Rear tine tiller diagram

Yard machines bracket:mt:c

Part #786-04307

$16.74
In Stock
Ace Shoulder Spacer 748-04125
#7

Rear tine tiller diagram

Ace shoulder spacer

Part #748-04125

This item is not returnable
$6.83
In Stock
Yard Machines Stud 738-04139
#14

Rear tine tiller diagram

Yard machines stud

Part #738-04139

This item is not returnable
$4.51
In Stock
Yard Machines Bracket Assembly 686-04072
#37

Rear tine tiller diagram

Yard machines bracket assembly

Part #686-04072

$75.53
In Stock

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

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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 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 won't my tillers wheels or tines turn?

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

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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 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'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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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 difficulty
Time required
 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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How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

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

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A guide to garden tillers

A guide to garden tillers

Rear tine tiller or front tine tiller, what to know to help in choosing the correct one for your needs.…

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