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Weed Eater
Gas Line Trimmer

Model # WT4000 Official Weed Eater gas line trimmer

Here are the diagrams and repair parts for Official Weed Eater WT4000 gas line trimmer, as well as links to manuals and error code tables, if available.

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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 75 parts  |
Lock Nut 83923
#27

Engine and wheels diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
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Hex Flange Lock Nut 145212
#14

Chassis and v-belt diagram

Hex flange lock nut

Part #145212

Replaced by #532409149

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Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
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Hndl.knob.bl 189713X428
#12

Engine and wheels diagram

Hndl.knob.bl

Part #189713X428

Replaced by #532185577

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This part replaces 189713X428. Substitute parts can look different from the original.
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Line Trimmer Belt 185476
#4

Chassis and v-belt diagram

Line trimmer belt

Part #185476

Replaced by #532185476

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Manufacturer substitution
This part replaces 185476. Substitute parts can look different from the original.
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Handle Bolt 191574
#11

Engine and wheels diagram

Handle bolt

Part #191574

Replaced by #532191574

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This part replaces 191574. Substitute parts can look different from the original.
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Lock Washer 10040600
#23

Chassis and v-belt diagram

Lock washer

Part #10040600

Replaced by #596238701

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Manufacturer substitution
This part replaces 10040600. Substitute parts can look different from the original.
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Jackshaft 172603
#28

Chassis and v-belt diagram

Jackshaft

Part #172603

Replaced by #596878501

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Manufacturer substitution
This part replaces 172603. Substitute parts can look different from the original.
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Carrier Plate 173531
#34

Chassis and v-belt diagram

Carrier plate

Part #173531

Replaced by #596878501

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This part replaces 173531. Substitute parts can look different from the original.
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Head 173619
#40

Chassis and v-belt diagram

Head

Part #173619

Replaced by #596878501

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This part replaces 173619. Substitute parts can look different from the original.
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Nut 132004
#33

Engine and wheels diagram

Nut

Part #132004

Replaced by #582478602

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This part replaces 132004. Substitute parts can look different from the original.
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Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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Why won't my gas line trimmer start?

Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…

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Why does my gas line trimmer run rough?

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

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Why does my gas line trimmer leak gas?

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

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Repair guides for gas line trimmers

These step-by-step repair guides will help you safely fix what’s broken on your grass line trimmer.

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How to rebuild a line trimmer carburetor

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

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Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

Read more
Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

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Grass line trimmer maintenance checklist

Grass line trimmer maintenance checklist

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