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Swisher
Rear-Engine Riding Mower

Model # ZT18542 Official Swisher zero-turn riding lawn mower

Here are the diagrams and repair parts for Official Swisher ZT18542 zero-turn 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 247 parts  |
12 Volt Lawn And Garden Battery (not Shown) U1L

#NI08

All parts diagram

12 volt lawn and garden battery (not shown)

Part #U1L

The manufacturer no longer makes this part, and there's no substitute part

5/16-18 X 1 NB253
5/16-18 x 1

Part #NB253

The manufacturer no longer makes this part, and there's no substitute part

Weld Idler 3850TK
#28

Mowing deck/deck idler diagram

Weld idler

Part #3850TK

The manufacturer no longer makes this part, and there's no substitute part

Seat 15" Back With Arm Rest (42" Mower Only) 3791
#1A

Seat base/control cover diagram

Seat 15" back with arm rest (42" mower only)

Part #3791

The manufacturer no longer makes this part, and there's no substitute part

Lawn & Garden Equipment Bolt NB509
#17

Deck lift/height adj. indicator diagram

Lawn & garden equipment bolt

Part #NB509

The manufacturer no longer makes this part, and there's no substitute part

Wheel Spacer 3825
#16

Wheel/transaxle/transmission diagram

Wheel spacer

Part #3825

The manufacturer no longer makes this part, and there's no substitute part

Park Decal OD99152
#5

Decals diagram

Park decal

Part #OD99152

The manufacturer no longer makes this part, and there's no substitute part

Nut - Jam 1/ NB118
#11

Wheel/transaxle/transmission diagram

Nut - jam 1/

Part #NB118

The manufacturer no longer makes this part, and there's no substitute part

Lawn Tractor Anti-sway Bar, Left 3665
#9

Mowing deck/deck idler diagram

Lawn tractor anti-sway bar, left

Part #3665

The manufacturer no longer makes this part, and there's no substitute part

Lawn & Garden Equipment Hex Nut NB170
Lawn & garden equipment hex nut

Part #NB170

The manufacturer no longer makes this part, and there's no substitute part

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

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

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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…

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Why won't my riding mower start?

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

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

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

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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…

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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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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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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 move?

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

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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 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.…

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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.…

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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.

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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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