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Model # 21AA414A752 Official MTD rear-tine tiller
Here are the diagrams and repair parts for Official MTD 21AA414A752 rear-tine tiller, as well as links to manuals and error code tables, if available.
 Owner’s manualBy Schematic
By Part
SELECT DIAGRAM
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21AA414A752 Tillers
#34
Gear case diagram
Bearing
Part #741-0124
Replaced by #941-0600
?
Manufacturer substitution
This part replaces 741-0124. Substitute parts can look different from the original.
$32.24 |Â
16% OFFÂ Phone Price : $38.24
In Stock
#9
Engine/wheels/tines diagram
Yard machines lawn & garden equipment bell washer (replaces 936-0242)
Part #736-0242
This item is not returnable
$6.58 |Â
13% OFFÂ Phone Price : $7.58
Back Order
#33
Shield & handle diagram
Tiller wing nut
Part #712-0421
Replaced by #712-0421
?
Manufacturer substitution
This part replaces 712-0421. Substitute parts can look different from the original.
This item is not returnable
$2.49 |Â
29% OFFÂ Phone Price : $3.49
In Stock
#38
Shield & handle diagram
Toro lawn & garden equipment lock washer (replaces 936-0169)
Part #736-0169
This item is not returnable
$5.26
In Stock
#8
Engine/wheels/tines diagram
Ryobi lawn & garden equipment hex nut (replaces 912-3010)
Part #712-3010
$48.86
In Stock
Aircap lawn & garden equipment hex screw
Part #710-0896
This item is not returnable
$5.22 |Â
16% OFFÂ Phone Price : $6.22
In Stock
#1
Gear case diagram
Shaft seal
Part #721-0378
Replaced by #921-0378
?
Manufacturer substitution
This part replaces 721-0378. Substitute parts can look different from the original.
This item is not returnable
$24.37 |Â
20% OFFÂ Phone Price : $30.37
In Stock
#2
Gear case diagram
Ryobi lawn & garden equipment hex nut, 7/16-20
Part #712-0378
This item is not returnable
$10.56 |Â
16% OFFÂ Phone Price : $12.56
In Stock
#7
Gear case diagram
Tiller shift fork (replaces 618-0245a)
Part #618-0245B
$112.79 |Â
10% OFFÂ Phone Price : $124.79
In Stock
#43
Gear case diagram
Ryobi tiller detent ball
Part #741-0862
This item is not returnable
$6.86 |Â
13% OFFÂ Phone Price : $7.86
In Stock
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
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.
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…