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MTD 21A-450 rear tine gas tiller Parts
Here are the diagrams and repair parts for MTD 21A-450 rear tine gas tiller, as well as links to manuals and error code tables, if available.
Owner’s manual
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Browse Parts for 21A-450 Tillers
Gear case assembly diagram
Housing Assembly
Part #686-0108Replaced by #686-0108A-0637
Manufacturer substitutionThis part replaces 686-0108. Substitute parts can look different from the original.In Stock$373.87
Qty
Handle/tine adapter/shield diagram
Washer
Part #736-0253Replaced by #936-0253
Manufacturer substitutionThis part replaces 736-0253. Substitute parts can look different from the original.This item is not returnableIn Stock$5.8615% OFF Phone Price : $6.86
QtyHandle/tine adapter/shield diagram
Spacer
Part #750-0885Replaced by #750-0885A
Manufacturer substitutionThis part replaces 750-0885. Substitute parts can look different from the original.In Stock$21.00QtyGear case assembly diagram
Gear Assembly
Part #617-0062Replaced by #617-0062A
Manufacturer substitutionThis part replaces 617-0062. Substitute parts can look different from the original.In Stock$160.96QtyOuter and inner engine pulley/wheels diagram
Wheel Assembly
Part #634-0107
The manufacturer no longer makes this part, and there's no substitute part
#NI01
All parts diagram
Grease
Part #737-0300
The manufacturer no longer makes this part, and there's no substitute part
Handle/tine adapter/shield diagram
Front Tine Shield Scraper Bracket
Part #786-0180
The manufacturer no longer makes this part, and there's no substitute part
#0
All parts diagram
Gear Case As
Part #686-0107
The manufacturer no longer makes this part, and there's no substitute part
Outer and inner engine pulley/wheels diagram
Wheel Assembly
Part #634-0110
The manufacturer no longer makes this part, and there's no substitute part
Outer and inner engine pulley/wheels diagram
Keeper Belt Idler
Part #786-0193
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.
Thinking about tilling your garden this fall? Learn the pros and cons of fall tilling, when it makes sense, and how to p…
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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