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Rear-Tine Tiller

Model # 21A-644A711 Official Troybilt tiller

Here are the diagrams and repair parts for Official Troybilt 21A-644A711 tiller, as well as links to manuals and error code tables, if available.

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Browse Parts for
21A-644A711 Tillers
Lawn Tractor Screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599) 710-0599
Lawn tractor screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)

Part #710-0599

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This item is not returnable
$4.91
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Sears Lawn Tractor Screw 710-0627
#19

Belt cover/belts/engine bracket diagram

Sears lawn tractor screw

Part #710-0627

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$6.47
13% OFF Phone Price : $7.47
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Lock Washer 736-0119
Lock washer

Part #736-0119

Replaced by #936-0119

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Manufacturer substitution
This part replaces 736-0119. Substitute parts can look different from the original.
This item is not returnable
$6.05
14% OFF Phone Price : $7.05
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Lawn & Garden Equipment Screw, 3/8-16 X 1-3/4-in 710-0347
Lawn & garden equipment screw, 3/8-16 x 1-3/4-in

Part #710-0347

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$7.69
12% OFF Phone Price : $8.69
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Reverse Belt 1916658
#8

Belt cover/belts/engine bracket diagram

Reverse belt

Part #1916658

Replaced by #954-04091

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Manufacturer substitution
This part replaces 1916658. Substitute parts can look different from the original.
This item is not returnable

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$27.89
18% OFF Phone Price : $33.89
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Lawn Tractor Push Cap 726-0201
#3

Bumper diagram

Lawn tractor push cap

Part #726-0201

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$10.56
16% OFF Phone Price : $12.56
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Lawn Tractor Hex Bolt 710-3008
Lawn tractor hex bolt

Part #710-3008

This item is not returnable
$4.62
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Lawn & Garden Equipment Cable Tie 725-0157
#13

Cable assembly diagram

Lawn & garden equipment cable tie

Part #725-0157

Replaced by #726-0178

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Manufacturer substitution
This part replaces 725-0157. Substitute parts can look different from the original.
This item is not returnable
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Roll Pin 1/4 715-0108
#1

Tine hood/transmission diagram

Roll pin 1/4

Part #715-0108

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Ace Lawn & Garden Equipment Flat Washer 736-3078
#38

Belt cover/belts/engine bracket diagram

Ace lawn & garden equipment flat washer

Part #736-3078

This item is not returnable
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Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

Main causes: clutch cable problems, faulty transmission…

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

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

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

Main causes: broken shaft clevis pins, transmission failure…

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

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

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 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.

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.…

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.…

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.…