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Model # 21AA45M5031 Official MTD rear-tine tiller
Here are the diagrams and repair parts for Official MTD 21AA45M5031 rear-tine tiller, as well as links to manuals and error code tables, if available.
 Owner’s manual
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Browse Parts for21AA45M5031 Tillers
- #41
Drive system diagram
Mtd lawn and garden equipment nutPart #712-04064
This item is not returnable$4.49 |Â18% OFFÂ Phone Price : $5.49In Stock - Mtd lawn tractor screw
Part #710-0599
This item is not returnable$4.91 |Â17% OFFÂ Phone Price : $5.91In Stock - #45
Transmission assembly diagram
Mtd lawn tractor ball bearingPart #941-0600
$32.24 |Â16% OFFÂ Phone Price : $38.24In Stock - #36
Handle & tine shield diagram
Tiller wing nutPart #712-0421
Replaced by #712-0421
?Manufacturer substitutionThis part replaces 712-0421. Substitute parts can look different from the original.This item is not returnable$2.49 |Â29% OFFÂ Phone Price : $3.49In Stock - #43
Drive system diagram
Yard-man lawn tractor cotter pinPart #714-04043
This item is not returnable$7.49 |Â12% OFFÂ Phone Price : $8.49In Stock - #20
Drive system diagram
Tiller clutch cablePart #746-1117
Replaced by #946-1117
?Manufacturer substitutionThis part replaces 746-1117. Substitute parts can look different from the original.$73.10 |Â8% OFFÂ Phone Price : $79.10In Stock - Mtd lawn tractor hex bolt
Part #710-3008
This item is not returnable$4.62 |Â18% OFFÂ Phone Price : $5.62In Stock - #38
Handle & tine shield diagram
Mtd lawn & garden equipment flat washerPart #736-0204
This item is not returnable$5.43 |Â16% OFFÂ Phone Price : $6.43In Stock - #33
Handle & tine shield diagram
Yard-man lawn tractor hex boltPart #710-04482
This item is not returnable$5.18 |Â16% OFFÂ Phone Price : $6.18In Stock - #10
Drive system diagram
Lawn & garden equipment hex nutPart #912-3010
Replaced by #712-3010
?Manufacturer substitutionThis part replaces 912-3010. Substitute parts can look different from the original.$48.86In 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.…
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