Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Husqvarna
Rear-Engine Riding Mower

Model # MZ6128ZT-966613101 Official Husqvarna zero-turn riding lawn mower

Here are the diagrams and repair parts for Official Husqvarna MZ6128ZT-966613101 zero-turn riding lawn mower, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

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

Search
ALL PARTS
Showing 10 of 337 parts  |
Craftsman Lawn Tractor Shoulder Bolt 539107608
Craftsman lawn tractor shoulder bolt

Part #539107608

Replaced by #596434404

?
Manufacturer substitution
This part replaces 539107608. Substitute parts can look different from the original.
BEST SELLER
$6.64 | 
13% OFF Phone Price : $7.64
In Stock
Nut.9/16.top 539107590
Nut.9/16.top

Part #539107590

Replaced by #596134801

?
Manufacturer substitution
This part replaces 539107590. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Lawn & Garden Equipment Flat Washer 539990692
Lawn & garden equipment flat washer

Part #539990692

Replaced by #596134901

?
Manufacturer substitution
This part replaces 539990692. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$3.98 | 
20% OFF Phone Price : $4.98
In Stock
Lawn Tractor Washer 539990118
#20

Hydraulic pump-motor diagram

Lawn tractor washer

Part #539990118

Replaced by #596238701

?
Manufacturer substitution
This part replaces 539990118. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Idler Pulley 539107620
Idler pulley

Part #539107620

Replaced by #596481401

?
Manufacturer substitution
This part replaces 539107620. Substitute parts can look different from the original.
BEST SELLER
$30.64 | 
16% OFF Phone Price : $36.64
In Stock
Lawn Tractor Nut 539976978
Lawn tractor nut

Part #539976978

Replaced by #582478602

?
Manufacturer substitution
This part replaces 539976978. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$2.64 | 
27% OFF Phone Price : $3.64
In Stock
Lawn Tractor Lock Washer 539990247
#33

Engine plate-966690501 diagram

Lawn tractor lock washer

Part #539990247

Replaced by #596238901

?
Manufacturer substitution
This part replaces 539990247. Substitute parts can look different from the original.
This item is not returnable
$5.11
In Stock
Spacer Washer 539107520
Spacer washer

Part #539107520

Replaced by #532187690

?
Manufacturer substitution
This part replaces 539107520. Substitute parts can look different from the original.
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Craftsman Hour Meter 576179401
Craftsman hour meter

Part #576179401

Replaced by #594919101

?
Manufacturer substitution
This part replaces 576179401. Substitute parts can look different from the original.
This item is not returnable
$26.64 | 
18% OFF Phone Price : $32.64
In Stock
Lawn Tractor Bolt, 5/16-18 X 3/4-in 539990316
Lawn tractor bolt, 5/16-18 x 3/4-in

Part #539990316

Replaced by #595901601

?
Manufacturer substitution
This part replaces 539990316. Substitute parts can look different from the original.
This item is not returnable
$3.98 | 
20% OFF Phone Price : $4.98
In Stock

RECOMMENDED MAINTENANCE PARTS AND ACCESSORIES

Most common symptoms to help you fix your riding mowers & tractors

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

View all

Why is my riding mower not cutting evenly?

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…

Read more

Why won't my riding mower start?

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

Read more

Why is the steering loose on my riding mower?

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Read more

How do I fix a flat tire on my riding mower?

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Read more

Why won't my riding mower cut grass?

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Read more

How do I charge a dead battery on my riding mower?

Main causes: faulty battery, bad alternator…

Read more

Why does my riding mower deck vibrate?

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

Read more

Why does my riding mower creep in neutral?

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Read more

Why won't my riding mower move?

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Read more

Most common repair guides to help fix your riding mowers & tractors

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

View all
How to replace the seat switch on a riding lawn mower

How to replace the seat switch on a riding lawn mower

Follow the steps in this guide to install a new riding mower seat switch in about 15 minutes.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower spark plug

How to replace a riding lawn mower spark plug

If the engine is hard to start or if the spark plug electrode is burnt or cracked, take 15 minutes to replace it.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower rear tire

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.…

Read more
Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your 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.

View all
How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more
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
Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…

Read more

Parts & More