Ariens
Front-Engine Lawn Tractor

Model #A21A42-96046005400 Ariens lawn tractor

Here are the diagrams and repair parts for Ariens A21A42-96046005400 lawn tractor, as well as links to manuals and error code tables, if available.


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Showing 10 of 318 parts

Lawn Tractor Ignition Switch

#30

Electrical Diagram

$26.54

In Stock

Lawn Tractor Muffler

#2

Engine Diagram

Lawn tractor muffler

Part #532188655
$32.02 | 
41% OFF MSRP:$54.00

In Stock

Lawn Tractor Belt Keeper

#59

Mower deck Diagram

Lawn tractor belt keeper

Part #532141043
This item is not returnable
$4.52

In Stock

Lawn & Garden Equipment Bolt

#113

Mower deck Diagram

Lawn & garden equipment bolt

Part #817000510
This item is not returnable
$5.31

In Stock

Lawn Tractor Torque Bracket

#226

Drive Diagram

$13.63

In Stock

Lawn Tractor Shift Arm Knob

#23

Drive Diagram

Lawn tractor shift arm knob

Part #532106933
This item is not returnable
$4.88

In Stock

Lawn Tractor Brake Rod Spring

#17

Drive Diagram

Lawn tractor brake rod spring

Part #532413678
This item is not returnable
$4.35

In Stock

Lawn Tractor Shift Rod

#22

Drive Diagram

Lawn tractor shift rod

Part #532197660
$35.52 | 
80% OFF MSRP:$180.00

In Stock

Lawn Tractor Console

#70

Drive Diagram

Lawn tractor console

Part #532411329
$12.03

In Stock

Lawn Tractor E-Ring

#33

Drive Diagram

Lawn tractor e-ring

Part #812000001
This item is not returnable
$3.18

In Stock

Symptoms common to all riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, dirty carburetor
Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, broken fuel line
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tune up
Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged mandrel pulleys
Main causes: shift lever needs adjustment, neutral control needs adjustment
Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a tune up

Repair guides common to all riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replace it.

Repair difficulty
Time required
 30 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.

Repair difficulty
Time required
 60 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

May 1, 2017

Riding lawn mower engine spins but won't start video

By Sears PartsDirect staff

Troubleshoot fuel, spark and compression issues.

June 1, 2016

How to mow a lawn for healthier grass

By Erin Hynes

How often and tall you mow your lawn has a big impact on its health. Check out these 3 rules.

March 1, 2016

How to change the Smart Switch Ignition password on a lawn tractor video

By Sears PartsDirect staff

See how to unlock the factory default start code so you can set your own passcode.