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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 manualBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for 21A-450 Tillers
Handle/tine adapter/shield diagram
Nut
Part #712-0431Replaced by #912-0431
Manufacturer substitutionThis part replaces 712-0431. Substitute parts can look different from the original.This item is not returnableIn Stock$8.9410% OFF Phone Price : $9.94
Qty
Gear case assembly diagram
Housing Assembly
Part #786-0171Replaced by #686-04129-0637
Manufacturer substitutionThis part replaces 786-0171. Substitute parts can look different from the original.In Stock$339.36QtyHandle/tine adapter/shield diagram
Depth Bar Assembly
Part #786-0120Replaced by #786-0120-0637
Manufacturer substitutionThis part replaces 786-0120. Substitute parts can look different from the original.In Stock$101.0011% OFF Phone Price : $113.00QtyHandle/tine adapter/shield diagram
Shield
Part #786-0090Replaced by #786-0090A-0637
Manufacturer substitutionThis part replaces 786-0090. Substitute parts can look different from the original.In Stock$52.18Qty#0
All parts diagram
Gear Case As
Part #686-0107
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
Outer and inner engine pulley/wheels diagram
Shift Cover Bracket
Part #786-0187
The manufacturer no longer makes this part, and there's no substitute part
Gear case assembly diagram
#50 Chain 5/8 Pitch X 54 Links
Part #713-0484
The manufacturer no longer makes this part, and there's no substitute part
Gear case assembly diagram
Tiller Shaft Assembly
Part #611-0128
The manufacturer no longer makes this part, and there's no substitute part
#NI02
All parts diagram
Part
Part #737-0288
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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