MTD
Rear-Tine Tiller

Model #21AA40M1052 MTD rear-tine tiller

Here are the diagrams and repair parts for MTD 21AA40M1052 rear-tine tiller, as well as links to manuals and error code tables, if available.


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For DIY troubleshooting advice and repair guides, visit our repair help section.

    Showing 10 of 215 parts

    Lawn & Garden Equipment Lock Nut, 5/16-18

    #6

    Handle & tine shield Diagram

    Lawn & garden equipment lock nut, 5/16-18

    Part #712-04063
    This item is not returnable
    $3.21 | 
    20% OFF MSRP:$4.00

    In Stock

    Lawn & Garden Equipment Nut

    #11

    Drive system Diagram

    Lawn & garden equipment nut

    Part #712-04064
    This item is not returnable
    $2.95 | 
    8% OFF MSRP:$3.20

    In Stock

    Lawn Tractor Screw

    #6

    Drive system Diagram

    Lawn tractor screw

    Part #710-0599
    This item is not returnable
    $3.81

    In Stock

    Lawn & Garden Equipment Bell Washer

    #37

    Handle & tine shield Diagram

    Lawn & garden equipment bell washer

    Part #736-0242
    This item is not returnable
    $3.23 | 
    15% OFF MSRP:$3.80

    In Stock

    Lawn & Garden Equipment Lock Washer

    #16

    Drive system Diagram

    Lawn & garden equipment lock washer

    Part #936-0119
    This item is not returnable
    $3.65 | 
    21% OFF MSRP:$4.60

    In Stock

    Lawn Tractor Spring

    #15

    Drive system Diagram

    Lawn tractor spring

    Part #732-04276A
    This item is not returnable
    $6.25 | 
    17% OFF MSRP:$7.50

    In Stock

    Tiller Reverse Cable

    #38

    Handle & tine shield Diagram

    Tiller reverse cable

    Part #946-04504
    $24.23 | 
    7% OFF MSRP:$26.00

    In Stock

    Lawn Mower Roller Wheel

    #30

    Drive system Diagram

    Lawn mower roller wheel

    Part #756-0625
    This item is not returnable
    $5.94 | 
    10% OFF MSRP:$6.60

    In Stock

    Tiller Click Pin

    #2

    Drive system Diagram

    Tiller click pin

    Part #714-0143A
    This item is not returnable
    $3.90 | 
    22% OFF MSRP:$5.00

    In Stock

    Lawn & Garden Equipment Shoulder Screw

    #22

    Drive system Diagram

    Lawn & garden equipment shoulder screw

    Part #738-04425
    This item is not returnable
    $2.73 | 
    15% OFF MSRP:$3.20

    In Stock

    Symptoms common to all tillers

    Choose a symptom to see related tiller repairs.

    Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, leaky carburetor seal
    Main causes: broken shaft clevis pins, transmission failure
    Main causes: worn or broken drive belts, bad transmission, clutch cable problems
    Main causes: clutch cable problems, faulty transmission
    Main causes: dirty carburetor, engine needs tune up, stale gas
    Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter
    Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper depth-stake setting

    Repair guides common to all tillers

    These step-by-step repair guides will help you safely fix what’s broken on your tiller.

    May 1, 2013
    By Lyle Weischwill
    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 starter assembly is broken, follow the steps in this repair guide to replace it.

    Repair difficulty
    Time required
     15 minutes or less

    Articles and videos common to all tillers

    Use the advice and tips in these articles and videos to get the most out of your tiller.

    December 28, 2018

    Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

    By Sears PartsDirect staff

    This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.

    November 1, 2016

    A guide to garden tillers

    By Sears PartsDirect staff

    Rear tine tiller or front tine tiller, what to know to help in choosing the correct one for your needs.

    November 1, 2015

    Tiller common questions

    By Sears PartsDirect staff

    These frequently asked questions might help you figure out what's wrong with your garden tiller.