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Troybilt
Gas Line Trimmer

Model # TB4000 Official Troybilt trimmer

Here are the diagrams and repair parts for Official Troybilt TB4000 trimmer, as well as links to manuals and error code tables, if available.

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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 155 parts  |
Recoil Case (includes 89 And 90) 182120
#88

Engine parts diagram

Recoil case (includes 89 and 90)

Part #182120

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

Spacer 181731
#54

Engine parts diagram

Spacer

Part #181731

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

Spring 181038
#12

Engine parts diagram

Spring

Part #181038

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

Screw 182143
#91

Engine parts diagram

Screw

Part #182143

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

Trigger 181689
#5

Boom and trimmer diagram

Trigger

Part #181689

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

Line Trimmer Air Cleaner Cover 182115
#49

Engine parts diagram

Line trimmer air cleaner cover

Part #182115

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

Mounting Hardware 182195
#23

Boom and trimmer diagram

Mounting hardware

Part #182195

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

Mount 147492
#26

Boom and trimmer diagram

Mount

Part #147492

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

Arm 182189
#28

Boom and trimmer diagram

Arm

Part #182189

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

Switch 180252
#6

Boom and trimmer diagram

Switch

Part #180252

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

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 …

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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…

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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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Top 10 electric lawn and garden tools for 2023

Top 10 electric lawn and garden tools for 2023

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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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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Grass line trimmer maintenance checklist

Grass line trimmer maintenance checklist

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this help…

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