Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Please enter one or more characters
Scan Icon
Tips to find your model number
Water filters
Water filter finder tool
DIY help
Featured products
Top brands
View all parts by brand
Top products and services
Products by brand
Orders
Customer Service
Schedule a repair
MTD 21A-450 rear tine gas tiller

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.

By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for 21A-450 Tillers

  • Tiller Tire for MTD 21A-450 - Part 734-0808A

    Outer and inner engine pulley/wheels diagram

    14"tler Tire

    Part #734-0808

    Replaced by #734-0808A

    Info Icon
    Manufacturer substitution
    This part replaces 734-0808. Substitute parts can look different from the original.
    In Stock
    $129.16
    9% OFF Phone Price : $141.16Info Icon
    Minus Item
    Qty
    Plus Item
  • Shoulder Spacer for MTD 21A-450 - Part 938-0958

    Handle/tine adapter/shield diagram

    Shoulder Spacer

    Part #738-0958

    Replaced by #938-0958

    Info Icon
    Manufacturer substitution
    This part replaces 738-0958. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $7.77
    Minus Item
    Qty
    Plus Item
  • Clutch Collar for MTD 21A-450 - Part 717-0853A

    Gear case assembly diagram

    Fork

    Part #717-0853

    Replaced by #717-0853A

    Info Icon
    Manufacturer substitution
    This part replaces 717-0853. Substitute parts can look different from the original.
    In Stock
    $152.02
    Minus Item
    Qty
    Plus Item
  • Tiller Handle Plug for MTD 21A-450 - Part 735-0246A

    Handle/tine adapter/shield diagram

    Plug-vinyl E

    Part #735-0246

    Replaced by #735-0246A

    Info Icon
    Manufacturer substitution
    This part replaces 735-0246. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $10.51
    Minus Item
    Qty
    Plus Item
  • Lawn Tractor Tire Valve Stem for MTD 21A-450 - Part 934-0255

    Outer and inner engine pulley/wheels diagram

    Air Valve

    Part #734-0255

    Replaced by #934-0255

    Info Icon
    Manufacturer substitution
    This part replaces 734-0255. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $7.54
    12% OFF Phone Price : $8.54Info Icon
    Minus Item
    Qty
    Plus Item
  • Snowblower Ball Bearing for MTD 21A-450 - Part 941-0563

    Gear case assembly diagram

    Ball Bearing

    Part #741-0563

    Replaced by #941-0563

    Info Icon
    Manufacturer substitution
    This part replaces 741-0563. Substitute parts can look different from the original.
    In Stock
    $44.09
    12% OFF Phone Price : $50.09Info Icon
    Minus Item
    Qty
    Plus Item
  • Tiller Input Shaft for MTD 21A-450 - Part 711-1349B

    Gear case assembly diagram

    Input Shaft

    Part #711-1349

    Replaced by #711-1349B

    Info Icon
    Manufacturer substitution
    This part replaces 711-1349. Substitute parts can look different from the original.
    In Stock
    $111.14
    Minus Item
    Qty
    Plus Item
  • Gear Asm-rev for MTD 21A-450 - Part 617-0058A

    Gear case assembly diagram

    Gear Assembly

    Part #617-0058

    Replaced by #617-0058A

    Info Icon
    Manufacturer substitution
    This part replaces 617-0058. Substitute parts can look different from the original.
    In Stock
    $108.31
    Minus Item
    Qty
    Plus Item
  • Troy-bilt Lawn & Garden Hex Lock Nut for MTD 21A-450 - Part 912-0431

    Handle/tine adapter/shield diagram

    Nut

    Part #712-0431

    Replaced by #912-0431

    Info Icon
    Manufacturer substitution
    This part replaces 712-0431. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $8.94
    10% OFF Phone Price : $9.94Info Icon
    Minus Item
    Qty
    Plus Item
  • Lawn & Garden Equipment Knob for MTD 21A-450 - Part 712-0421

    Handle/tine adapter/shield diagram

    Tiller Wing Nut

    Part #712-0421

    Replaced by #712-0421

    Info Icon
    Manufacturer substitution
    This part replaces 712-0421. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.90
    26% OFF Phone Price : $3.90Info Icon
    Minus Item
    Qty
    Plus Item

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

View all

Why does my tiller's engine leak oil or gas?

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

Read more

Why does my tiller's engine run roughly or misfire?

Main causes: dirty carburetor, engine needs tune up, stale gas…

Read more

Why won't my tiller's engine start?

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

Read more

Why do my tiller's wheels turn but the tines don't?

Main causes: broken shaft clevis pins, transmission failure…

Read more

Why does my tiller turn the soil poorly?

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

Read more

Why do my tiller's tines turn but the wheels don't?

Main causes: clutch cable problems, faulty transmission…

Read more

Why won't my tillers wheels or tines turn?

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

Read more

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.

View all
How to replace a tiller recoil starter

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…

Read more

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.

View all
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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

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

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

Read more
Tiller common questions

Tiller common questions

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

Read more

Parts & More

Air Compressor
Craftsman 900150350 air compressor parts
Dryer
Samsung DVG45M5500P/A3-00 dryer partsSamsung DV422GWHDWR/AA-00 dryer parts
Electric Range
Frigidaire FEF366CCE electric range parts
Front-Engine Lawn Tractor
Craftsman 917273020 front-engine lawn tractor parts
Garage Door Opener
Craftsman 139654002 garage door opener parts
Mechanical Sewing Machine
Kenmore 38515358600 mechanical sewing machine parts
Parts
Lawn Tractor Headlight Lens, Left 184246X599Free Wheel Rod 1721622SMDryer Wire Harness EAD60946201Lawn Tractor 46-in Deck Mulching Blade 33286Lawn Tractor 48-in Deck Bagging Blade 588811002Lawn & Garden Equipment Engine Standard Piston Ring Set 40013Range Surface Burner Valve WPW10206287Range Lock Adjusting Screw 318147811Tiller Handle Grip 720-0278ARefrigerator Inverter EBR64173903Refrigerator Door Handle WPW10298179
Top-Mount Refrigerator
Kenmore 25360082417 top-mount refrigerator parts
Washer
Maytag LAT2301AAE washer parts