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Troybilt
Gas Line Trimmer

Model # TB425CS Official Troybilt 4-cycle gas trimmer

Here are the diagrams and repair parts for Official Troybilt TB425CS 4-cycle gas trimmer, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 135 parts  |
Screw 791-181080
#32

Engine parts diagram

Screw

Part #791-181080

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

Fuel Cap 753-1229
#28

Engine parts diagram

Fuel cap

Part #753-1229

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

Pal Nut 791-181560
#23

Boom and trimmer diagram

Pal nut

Part #791-181560

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

Spring 791-181459
#33

Boom and trimmer diagram

Spring

Part #791-181459

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

Clamp 791-181812
#9

Boom and trimmer diagram

Clamp

Part #791-181812

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

Washer 791-182409
#85

Engine parts diagram

Washer

Part #791-182409

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

Blade Assembly 791-181823
#28

Boom and trimmer diagram

Blade assembly

Part #791-181823

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

Valve 791-181040
#73

Engine parts diagram

Valve

Part #791-181040

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

Screw 791-180531
#26

Boom and trimmer diagram

Screw

Part #791-180531

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

Filter Cover 753-04316
#89

Engine parts diagram

Filter cover

Part #753-04316

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 …

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…

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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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