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MTD
Front-Tine Tiller

Model # 21A-154A799 Official MTD front-tine tiller

Here are the diagrams and repair parts for Official MTD 21A-154A799 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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Showing 10 of 50 parts  |
Lawn & Garden Equipment Lock Nut, 5/16-18 (replaces 753-05591) 712-04063
#6

Cultivator assembly diagram

Lawn & garden equipment lock nut, 5/16-18 (replaces 753-05591)

Part #712-04063

BEST SELLER
This item is not returnable
$4.09 | 
20% OFF Phone Price : $5.09
In Stock
Lawn & Garden Equipment Nut 712-04064
#27

Cultivator assembly diagram

Lawn & garden equipment nut

Part #712-04064

BEST SELLER
This item is not returnable
$4.16 | 
19% OFF Phone Price : $5.16
In Stock
Bolt, Hex Wa 4543
#26

Cultivator assembly diagram

Bolt, hex wa

Part #4543

Replaced by #710-0599

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Manufacturer substitution
This part replaces 4543. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.91 | 
17% OFF Phone Price : $5.91
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Lawn & Garden Equipment Nut 712-0324
#5

Cultivator assembly diagram

Lawn & garden equipment nut

Part #712-0324

This item is not returnable
$4.72 | 
17% OFF Phone Price : $5.72
In Stock
Lawn Mower Wheel (replaces 734-04086) 734-1988
#50

Cultivator assembly diagram

Lawn mower wheel (replaces 734-04086)

Part #734-1988

This item is not returnable
$21.64 | 
23% OFF MSRP : $28.00
In Stock
Handle 749-1295A
#16

Cultivator assembly diagram

Handle

Part #749-1295A

Replaced by #749-1295A-0637

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Manufacturer substitution
This part replaces 749-1295A. Substitute parts can look different from the original.
$62.79
In Stock
Motor Strap 786-04268
#42

Cultivator assembly diagram

Motor strap

Part #786-04268

This item is not returnable
$3.88
In Stock
Lawn & Garden Equipment Hex Flange Screw 710-04468
#45

Cultivator assembly diagram

Lawn & garden equipment hex flange screw

Part #710-04468

This item is not returnable
$6.63
In Stock
Clevis Pin 711-1017
#47

Cultivator assembly diagram

Clevis pin

Part #711-1017

$12.09
In Stock
Lawn Mower Handle 731-05186
#10

Cultivator assembly diagram

Lawn mower handle

Part #731-05186

$16.74
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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