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Weed Eater
Rear-Engine Riding Mower

Model # 91728600 Official Weed Eater riding lawn mower

Here are the diagrams and repair parts for Official Weed Eater 91728600 riding lawn mower, as well as links to manuals and error code tables, if available.

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  • 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”.

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

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 212 parts  |
Lock Nut 73900600
#37

Mower deck diagram

Lock nut

Part #73900600

Replaced by #532409149

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Manufacturer substitution
This part replaces 73900600. Substitute parts can look different from the original.
BEST SELLER
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$5.31 | 
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In Stock
Lawn Tractor Bolt 173984
#27

Mower deck diagram

Lawn tractor bolt

Part #173984

Replaced by #584953901

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Manufacturer substitution
This part replaces 173984. Substitute parts can look different from the original.
BEST SELLER
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$5.31 | 
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Lawn Tractor Ignition Switch 193350
#3

Electrical diagram

Lawn tractor ignition switch

Part #193350

Replaced by #532193350

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Manufacturer substitution
This part replaces 193350. Substitute parts can look different from the original.
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$24.60 | 
20% OFF Phone Price : $30.60
In Stock
Lawn Tractor Deflector Shield Hinge Rod 131491
#12

Mower deck diagram

Lawn tractor deflector shield hinge rod

Part #131491

Replaced by #595297001

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Manufacturer substitution
This part replaces 131491. Substitute parts can look different from the original.
BEST SELLER
$7.05 | 
12% OFF Phone Price : $8.05
In Stock
Lawn Tractor Flange Nut 400234
#28

Mower deck diagram

Lawn tractor flange nut

Part #400234

Replaced by #596134801

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Manufacturer substitution
This part replaces 400234. 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 Tractor Bearing 3366R
#7

Steering diagram

Lawn tractor bearing

Part #3366R

Replaced by #532003366

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Manufacturer substitution
This part replaces 3366R. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
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Husqvarna Lawn Tractor Washer (replaces 819191912) 19191912
#17

Mower deck diagram

Husqvarna lawn tractor washer (replaces 819191912)

Part #19191912

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$2.71 | 
27% OFF Phone Price : $3.71
In Stock
Hardened Race Thrust Bearing 6266H
#6

Steering diagram

Hardened race thrust bearing

Part #6266H

Replaced by #532006266

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Manufacturer substitution
This part replaces 6266H. Substitute parts can look different from the original.
BEST SELLER
$11.30 | 
15% OFF Phone Price : $13.30
In Stock
Lawn Tractor Belt Keeper 432520
#3

Mower deck diagram

Lawn tractor belt keeper

Part #432520

Replaced by #589676103

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Manufacturer substitution
This part replaces 432520. Substitute parts can look different from the original.
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$9.31 | 
10% OFF Phone Price : $10.31
In Stock
Lock Nut 73800500
Lock nut

Part #73800500

Replaced by #596040501

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Manufacturer substitution
This part replaces 73800500. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.11
In Stock

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

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 does my riding mower run rough or misfire?

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

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

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…

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Why is my riding mower leaking oil or gas?

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

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Why does my riding mower creep in neutral?

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

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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

Why does my riding mower deck vibrate?

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

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

Main causes: faulty battery, bad alternator…

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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.

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How to replace a mandrel assembly on a riding lawn mower

How to replace a mandrel assembly on a riding lawn mower

Replace the mandrel assembly if the blade shaft vibrates or doesn't spin.…

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Repair difficulty
Time required
 30 minutes or less
How to replace the flywheel key on a riding lawn mower

How to replace the flywheel key on a riding lawn mower

If the engine won't restart after hitting a stump or rock, the problem could be a sheared flywheel key. Follow these ste…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower ignition coil

How to replace a riding lawn mower ignition coil

If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…

Read more
Repair difficulty
Time required
 30 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.

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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.…

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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.…

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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.…

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