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MTD 21AA412A000 rear-tine tiller Parts
Here are the diagrams and repair parts for MTD 21AA412A000 rear-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 21AA412A000 Tillers
Handle & tine shield diagram
Bracket Assembly
Part #686-0043A
The manufacturer no longer makes this part, and there's no substitute part
Gear case diagram
Spacer
Part #750-0938
The manufacturer no longer makes this part, and there's no substitute part
Drive system diagram
Rim Assembly (for Models 643b, 645a)
Part #634-04218
The manufacturer no longer makes this part, and there's no substitute part
Gear case diagram
Button Plug
Part #726-0331
The manufacturer no longer makes this part, and there's no substitute part
Drive system diagram
Belt Keeper Bracket Assembly
Part #686-0031A
The manufacturer no longer makes this part, and there's no substitute part
Handle & tine shield diagram
Retainer Bracket
Part #786-0118
The manufacturer no longer makes this part, and there's no substitute part
Handle & tine shield diagram
Hand Bracket
Part #786-0108
The manufacturer no longer makes this part, and there's no substitute part
Gear case diagram
Tiller Gear Case Gasket
Part #721-0295
The manufacturer no longer makes this part, and there's no substitute part
Gear case diagram
Spacer
Part #750-0935
The manufacturer no longer makes this part, and there's no substitute part
Gear case diagram
Case Assy Ge
Part #686-0038
The manufacturer no longer makes this part, and there's no substitute part
Most common symptoms to help you fix your 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, lea…
Main causes: dirty carburetor, engine needs tune up, stale gas…
Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…
Main causes: broken shaft clevis pins, transmission failure…
Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…
Main causes: clutch cable problems, faulty transmission…
Main causes: worn or broken drive belts, bad transmission, clutch cable problems…
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 time and Difficulty
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.
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.…
These frequently asked questions might help you figure out what's wrong with your garden tiller.…
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