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Model # 21A34M5099 Official MTD front-tine tiller
Here are the diagrams and repair parts for Official MTD 21A34M5099 front-tine tiller, as well as links to manuals and error code tables, if available.
 Owner’s manualBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for
21A34M5099 Tillers
#8
Tines/engine diagram
Lawn tractor screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)
Part #710-0599
This item is not returnable
$4.91 |Â
17% OFFÂ Phone Price : $5.91
In Stock
#28
Tines/engine diagram
Lawn & garden equipment lock washer
Part #936-0119
This item is not returnable
$6.05 |Â
14% OFFÂ Phone Price : $7.05
In Stock
#23
Tines/engine diagram
Ryobi lawn tractor bolt (replaces 01000369, 1509-091, 1509-117, 153015, 706-10123-20, 706-501277-1, 710-0342, 910-3005)
Part #710-3005
This item is not returnable
$5.11 |Â
16% OFFÂ Phone Price : $6.11
In Stock
#33
Handle/wheels diagram
Lawn tractor nut (replaces 162396, 712-0240, hu-a901790053)
Part #912-0240
This item is not returnable
$5.47 |Â
15% OFFÂ Phone Price : $6.47
In Stock
#15
Tines/engine diagram
Lawn tractor hex bolt
Part #710-3008
This item is not returnable
$4.62 |Â
18% OFFÂ Phone Price : $5.62
In Stock
#34
Handle/wheels diagram
Lawn & garden equipment hex nut
Part #912-0429
Replaced by #712-0429
?
Manufacturer substitution
This part replaces 912-0429. Substitute parts can look different from the original.
This item is not returnable
$7.06
Back Order
#35
Tines/engine diagram
Tiller drive belt (replaces 754-0428)
Part #954-0428
Get free shipping with Automatic Reorder
$39.73 |Â
13% OFFÂ Phone Price : $45.73
In Stock
#11
Tines/engine diagram
Ace lawn & garden equipment flange lock nut
Part #712-3004A
This item is not returnable
$4.92 |Â
17% OFFÂ Phone Price : $5.92
In Stock
#5
Handle/wheels diagram
Lawn & garden equipment shoulder screw
Part #738-0929
This item is not returnable
$13.80
In Stock
#4
Tines/engine diagram
Tiller tine assembly (replaces 642-0004)
Part #642-0004-0637
$90.19 |Â
6% OFFÂ Phone Price : $96.19
In Stock
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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
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.…
Rear tine tiller or front tine tiller, what to know to help in choosing the correct one for your needs.…