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MTD
Front-Tine Tiller

Model # 21A-332B729 Official MTD front-tine tiller

Here are the diagrams and repair parts for Official MTD 21A-332B729 front-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 83 parts  |
Ryobi Stop Nut 712-0429
#12

Tine assembly/wheels diagram

Ryobi stop nut

Part #712-0429

This item is not returnable
$7.06
In Stock
Ryobi Lawn & Garden Equipment Hex Nut (replaces 912-3010) 712-3010
#18

Tine assembly/wheels diagram

Ryobi lawn & garden equipment hex nut (replaces 912-3010)

Part #712-3010

$7.71
In Stock
Sears Lawn & Garden Equipment Hex Bolt 710-3180
#20

Tine assembly/wheels diagram

Sears lawn & garden equipment hex bolt

Part #710-3180

This item is not returnable
$6.93 | 
13% OFF Phone Price : $7.93
In Stock
Belt 754-0428
#49

Handle/tine shield/belt diagram

Belt

Part #754-0428

Replaced by #954-0428

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Manufacturer substitution
This part replaces 754-0428. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$39.73 | 
13% OFF Phone Price : $45.73
In Stock
Spacer 750-0456
#27

Tine assembly/wheels diagram

Spacer

Part #750-0456

$7.71
In Stock
Ryobi Lawn Tractor Screw 710-0604A
#27

Handle/tine shield/belt diagram

Ryobi lawn tractor screw

Part #710-0604A

This item is not returnable
$5.62 | 
15% OFF Phone Price : $6.62
In Stock
Lawn & Garden Equipment Lock Nut (replaces 912-0442) 712-0442
#5

Handle/tine shield/belt diagram

Lawn & garden equipment lock nut (replaces 912-0442)

Part #712-0442

$11.89
In Stock
Aircap Tiller Idler Pulley 756-0313
#64

Handle/tine shield/belt diagram

Aircap tiller idler pulley

Part #756-0313

This item is not returnable
$30.11 | 
17% OFF Phone Price : $36.11
In Stock
Sears Lawn & Garden Equipment Hex Bolt 710-0602
#28

Handle/tine shield/belt diagram

Sears lawn & garden equipment hex bolt

Part #710-0602

This item is not returnable
$5.63 | 
15% OFF Phone Price : $6.63
In Stock
Lawn Mower Shoulder Screw (replaces 938-1225) 738-1225
#6

Handle/tine shield/belt diagram

Lawn mower shoulder screw (replaces 938-1225)

Part #738-1225

$11.71
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

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

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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