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Troybilt 21A-654J66 rear-tine tiller Parts

Here are the diagrams and repair parts for Troybilt 21A-654J66 rear-tine tiller, as well as links to manuals and error code tables, if available.

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Owner’s manual

Troybilt 21A-654J66 rear-tine tiller

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Browse Parts for 21A-654J66 Tillers

Transmission diagram
Oil Seal
Part #721-04036
Replaced by #921-04036
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 : $31.63
Qty
Wheels and tires diagram
Shield Bolt
Part #738-0688
Replaced by #938-0688
Manufacturer substitution
This part replaces 738-0688. Substitute parts can look different from the original.
This item is not returnable
In Stock
$15.17
12% OFF Phone Price : $17.17
Qty
Transmission diagram
Thrust Washer
Part #736-0492
Replaced by #936-0492
Manufacturer substitution
This part replaces 736-0492. Substitute parts can look different from the original.
In Stock
$34.32
Qty
Handlebar and controls diagram
Lawn & Garden Equipment Cable Tie
Part #725-0157
Replaced by #726-0178
Manufacturer substitution
This part replaces 725-0157. Substitute parts can look different from the original.
This item is not returnable
In Stock
$25.35
Qty
Tine shield diagram
Spacer
Part #GW-9534
Replaced by #750-04556
Manufacturer substitution
This part replaces GW-9534. Substitute parts can look different from the original.
In Stock
$34.32
Qty
Drive system diagram
Belt Wheel
Part #754-0346
Replaced by #954-0346
Manufacturer substitution
This part replaces 754-0346. Substitute parts can look different from the original.
Get free shipping with Automatic Reorder
In Stock
$33.19
15% OFF Phone Price : $39.19
Qty
Wheels and tires diagram
Adapter Assembly, Tine
Part #642-04015
The manufacturer no longer makes this part, and there's no substitute part
Drive system diagram
Pulley, 3i, 3.088 Eff Dia
Part #756-04081
The manufacturer no longer makes this part, and there's no substitute part
Transmission diagram
Gear, Worm, 30t
Part #717-04093
The manufacturer no longer makes this part, and there's no substitute part
Handlebar and controls diagram
Screw, Shoulder, .373 X .180 X 1/4-20
Part #738-04088
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.

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…

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

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

Why won't my tiller's engine start?

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

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

Main causes: broken shaft clevis pins, transmission failure…

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…

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

Main causes: clutch cable problems, faulty transmission…

Why won't my tillers wheels or tines turn?

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

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.

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.…

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.…

Tiller common questions

Tiller common questions

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