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

Troybilt 21A-644H766 tiller Parts

Here are the diagrams and repair parts for Troybilt 21A-644H766 tiller, as well as links to manuals and error code tables, if available.

Troybilt 21A-644H766 tiller
By Schematic
By Part
SELECT DIAGRAM
?

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

Browse Parts for 21A-644H766 Tillers

  • Lawn Mower Drive Control Cable for Troybilt 21A-644H766 - Part 946-04208

    Handlebar/cable diagram

    Drive Cable

    Part #1918745

    Replaced by #946-04208

    Info Icon
    Manufacturer substitution
    This part replaces 1918745. Substitute parts can look different from the original.
    In Stock
    $46.28
    11% OFF Phone Price : $52.28Info Icon
    Minus Item
    Qty
    Plus Item
  • Tiller Tine (powder Black) for Troybilt 21A-644H766 - Part 742-04032-0637

    Wheel shaft/tine shaft diagram

    "tine-11"""

    Part #1817060

    Replaced by #742-04032-0637

    Info Icon
    Manufacturer substitution
    This part replaces 1817060. Substitute parts can look different from the original.
    In Stock
    $37.02
    14% OFF Phone Price : $43.02Info Icon
    Minus Item
    Qty
    Plus Item
  • Tiller Gear Case Cover Gasket for Troybilt 21A-644H766 - Part 921-04229

    Transmission housing assembly diagram

    Housing Cover Gasket

    Part #GW-50032

    Replaced by #921-04229

    Info Icon
    Manufacturer substitution
    This part replaces GW-50032. Substitute parts can look different from the original.
    In Stock
    $12.49
    14% OFF Phone Price : $14.49Info Icon
    Minus Item
    Qty
    Plus Item
  • Tiller Tine Shaft Oil Seal for Troybilt 21A-644H766 - Part 921-04036

    Transmission housing assembly diagram

    Oil Seal

    Part #721-04036

    Replaced by #921-04036

    Info Icon
    Manufacturer substitution
    This part replaces 721-04036. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $25.63
    19% OFF Phone Price : $31.63Info Icon
    Minus Item
    Qty
    Plus Item
  • Shim - Front Bearing Cap, .010" Thick for Troybilt 21A-644H766 - Part 736-04308

    Shim/driveshaft diagram

    Shim

    Part #GW-1224-1

    Replaced by #736-04308

    Info Icon
    Manufacturer substitution
    This part replaces GW-1224-1. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $8.09
    Minus Item
    Qty
    Plus Item
  • Mtd Lawn & Garden Equipment Hex Nut for Troybilt 21A-644H766 - Part 712-3010

    Bumper diagram

    Hex Nut

    Part #712-0267

    Replaced by #712-3010

    Info Icon
    Manufacturer substitution
    This part replaces 712-0267. Substitute parts can look different from the original.
    In Stock
    $55.59
    10% OFF Phone Price : $61.59Info Icon
    Minus Item
    Qty
    Plus Item
  • Tiller Worm Gear for Troybilt 21A-644H766 - Part 917-04381

    Wheel shaft/shim diagram

    Worm Gear

    Part #1916542

    Replaced by #917-04381

    Info Icon
    Manufacturer substitution
    This part replaces 1916542. Substitute parts can look different from the original.
    In Stock
    $177.00
    6% OFF Phone Price : $189.00Info Icon
    Minus Item
    Qty
    Plus Item
  • Lawn & Garden Equipment Hex Lock Nut for Troybilt 21A-644H766 - Part 912-0291

    Nut

    Part #712-0291

    Replaced by #912-0291

    Info Icon
    Manufacturer substitution
    This part replaces 712-0291. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $7.77
    Minus Item
    Qty
    Plus Item
  • Shim - Same As Above, .062" Thick for Troybilt 21A-644H766 - Part 736-04305

    Shim/driveshaft diagram

    Shim

    Part #GW-1224-4

    Replaced by #736-04305

    Info Icon
    Manufacturer substitution
    This part replaces GW-1224-4. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $5.91
    Minus Item
    Qty
    Plus Item
  • Tiller Washer for Troybilt 21A-644H766 - Part 748-04087A

    Engine bracket/belt/cover diagram

    Shoulder Washer

    Part #1917746

    Replaced by #748-04087A

    Info Icon
    Manufacturer substitution
    This part replaces 1917746. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $11.86
    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

Aerator Attachment
Craftsman 48624326 aerator attachment parts
Chest Freezer
Shop Kenmore 25519502010 chest freezer parts
Electric Chainsaw
Shop McCulloch ELECTRAMAC EM 300S-16 electric chainsaw parts
Electric Walk-Behind Mower
Shop Black & Decker MM875 TYPE2 electric walk-behind mower parts
Front-Engine Lawn Tractor
Craftsman 917271141 front-engine lawn tractor parts
Lawn & Garden Engine
Shop Craftsman 143104081 lawn & garden engine partsShop Craftsman 143434452 lawn & garden engine partsShop Briggs & Stratton 252707-0625-01 lawn & garden engine parts
Parts
Range Oven Control Board 316207511Lawn Tractor Blade Engagement Cable 584243501 parts
Range
Roper Range Repair Parts
Rear-Engine Riding Mower
Shop Murray 9-30502 rear-engine riding mower parts
Side-By-Side Refrigerator
Shop Frigidaire FPE24VWDL2 side-by-side refrigerator partsShop Kenmore 25356279408 side-by-side refrigerator parts
Top-Mount Refrigerator
Shop Wards 10370 top-mount refrigerator partsShop GE TBX18SLRRWH top-mount refrigerator parts
Upright Vacuum
Dyson DC14 upright vacuum parts
Washer
Samsung WA456DRHDSU/AA-00 washer partsSamsung WF350ANW/XAA-00 washer parts
Wet/Dry Vacuum
Craftsman 12512007 wet/dry vacuum parts